Most travel data advice assumes a region behaves like a region. Buy for Europe and the price barely moves between Lisbon and Warsaw. The Caribbean does not work like that. Martinique and Saint Lucia are twenty-five miles apart, you can see one from the other on a clear day, and a month of data costs about nine times more on Saint Lucia. That is not a rounding difference or a promotion; it is the ordinary price on both islands, and the same pattern repeats across the whole arc. Which island you have booked matters more here than how much data you need, how long you are staying, or which seller you buy from. This guide is organised around that fact. It covers what the regional Caribbean plan actually includes, the handful of islands where that regional plan costs less than the island's own, the crossover point where a second island changes the answer, the well-known destinations that are not on the list at all, and the three places in the region you cannot buy data for. Read the section for your island rather than the whole thing.
Your island sets the price, and the spread here is the widest we sell
Across the whole range there are just under two hundred destinations sold as their own plan at a standard monthly size. Sort that list by price and the Caribbean does something no other region does: it appears at both ends. Twenty-one of the forty most expensive destinations in the whole range are in the Caribbean and on its rim. At the same time, four Caribbean addresses sit at the very cheapest price in the range, level with France, Spain and the United Kingdom.
The dearest end is genuinely steep. Aruba, Haiti, Bonaire, Saint Vincent and the Grenadines and the Bahamas all cost ten to twelve times what the cheapest Caribbean addresses cost for the same amount of data over the same month. Belize, which is not an island but gets booked on the same trips, is the single most expensive destination in the Americas in the range. Between those extremes sits a broad middle band — Curaçao, Turks and Caicos, Jamaica, Barbados, Dominica, Anguilla, Montserrat, Trinidad and Tobago, Bermuda, the Cayman Islands, Antigua and Barbuda — where a month of data costs seven to eight times what the same month costs in Western Europe.
What the pattern does not track is anything a traveller would guess. It is not distance from anywhere. It is not remoteness: Montserrat has a population under five thousand and costs less than Aruba, which has a hundred thousand people and an international airport with long-haul flights. It is not how expensive the hotels are. Saint Barthélemy is one of the most expensive places on earth to have lunch and one of the cheapest places in the range to buy a month of data.
What it does track is which country the island belongs to. Islands that are legally part of a large European state ride that state's networks and inherit its prices. Islands that are small independent nations, or dependencies with their own telecoms market, are priced as small markets. The Caribbean has an unusual concentration of both, sitting side by side, which is why the arc reads like two different continents on a price list.
The practical consequence is that the usual sizing instinct fails here. On a cheap destination, buying a size bigger than you need is insurance that costs pocket change. On a Caribbean island in the upper band, the same step up costs more than the flight's seat selection. It is worth spending five minutes on the right plan for the specific island rather than reaching for whatever is familiar.
The French addresses are the cheapest data in the region, by a distance
Five destinations in the region are French territory: Guadeloupe, Martinique, Saint Barthélemy, the French half of Saint Martin, and French Guiana on the South American mainland. All five are sold at the floor price of the entire range for a standard monthly plan — the same price as a month of data in Paris, Madrid or London. They are also the region's fastest: Orange runs 5G on them, alongside Digicel on 4G.
This is not a discount or a quirk of one seller. These islands are administratively part of France, their networks are French networks, and the price follows the network rather than the latitude. It is the single most useful thing to know about buying data in the Caribbean, because it turns several very expensive-looking itineraries into cheap ones.
If your trip is Guadeloupe or Martinique only, buy that island's own plan and stop reading about regional coverage. Nothing wider comes close, and the gap is not marginal. A month on Martinique costs less than a single day of data on several of its neighbours.
The same logic rescues a few island-hopping routes. Guadeloupe and Martinique are both served by the inter-island ferry route that also calls at Dominica and Saint Lucia, and the two French stops are the cheap ones. If your route weights towards the French islands, buying each of them separately is cheaper than any wider plan, even after you add a plan for the non-French stop.
Saint Barthélemy deserves a specific note because it is easy to get wrong. It is French, it is at the floor price, and it is not on the regional Caribbean coverage list. If Saint Barthélemy is on your itinerary you buy its own plan, and it is one of the cheapest lines on the whole trip.
French Guiana sits awkwardly in every list because it is geographically South American and administratively French. It is on the regional Caribbean coverage list despite being on the mainland, it is priced at the French floor, and travellers heading there for Kourou or the interior should simply buy it directly.
Five islands where the regional plan costs less than the island's own plan
In every other region we have written about, the arithmetic runs the same way: a single-country plan is cheaper than the wide regional one, and the regional plan only earns its price when the trip spans several countries. The Caribbean inverts that on a specific list of islands, and this is the most useful finding in this guide.
At all three monthly sizes, the regional plan covering twenty-five destinations costs less than the island's own plan on the British Virgin Islands, Grenada, Saint Kitts and Nevis, Saint Lucia, and Saint Vincent and the Grenadines. Not less per gigabyte, not less once you account for coverage — less in absolute terms, for the same data over the same month. On Saint Vincent the difference is substantial rather than marginal.
Antigua and Barbuda and the Cayman Islands are near-misses with an odd shape: the regional plan is cheaper than the island's own at the smallest and the largest monthly size, and dearer at the one in between. At the smallest monthly size, Dominica and Montserrat come out level with the regional plan rather than behind it.
For a traveller going to exactly one of those islands, the regional plan is a strict upgrade. You pay less than you would for the island-only plan, and you also get coverage of two dozen other destinations you may never touch. There is no catch to look for and no downside to weigh. If you are flying to Tortola, Bequia, Castries or Basseterre for a week, this is the buy.
The regional plan does have two real limits, and they are worth knowing before you commit. Its largest size is a ten-gigabyte month — there is no twenty-gigabyte option and no fifty-gigabyte option — so a heavy user staying a full month will run out and need to top it up. And there is no unlimited version of it at all. If you genuinely want unlimited data you are buying it per island, and on most of these islands it is not sold at all.
The islands where the regional plan does not win are the cheap ones and the broad middle. On the Dominican Republic, Puerto Rico, Guadeloupe, Turks and Caicos, Jamaica, Barbados, Anguilla and Dominica, the island's own plan is the cheaper buy for a single-island trip, and on the first three it is dramatically cheaper.
Where a second island changes the answer, and the three names that break the rule
Island-hopping is common here in a way it is not in most regions, so the second-island question is worth answering precisely rather than with a rule of thumb. We compared every possible pair of covered Caribbean islands against the regional plan at each monthly size, rather than picking a few examples.
At the smallest monthly size, the regional plan beats buying two separate island plans in one hundred and four of the one hundred and five possible pairs. At the middle monthly size it wins one hundred and twelve of one hundred and twenty. At the largest, one hundred and four of one hundred and five. For three islands, the regional plan wins essentially every combination at every size.
So the crossover in the Caribbean is two islands, not the four to six that holds in Europe or Asia. If you are visiting two islands, take the regional plan and stop calculating.
The exceptions are worth memorising because they are the same three names every time: Guadeloupe, the Dominican Republic and Puerto Rico. These are the cheap entries on the coverage list, and any pair that includes one of them can still come out ahead bought separately. Guadeloupe plus Dominica, Guadeloupe plus Barbados, Guadeloupe plus Jamaica, the Dominican Republic plus Puerto Rico — all of those are cheaper as two plans. Everything else is cheaper as one.
There is a second reason the two-island rule holds so strongly here, and it is not about price. Regional flights between Caribbean islands are short, frequent and unreliable. A plan that reconnects on its own the moment you land on the next island removes an errand you would otherwise be running in an arrivals hall at ten at night. That is worth something even in the rare pair where the arithmetic is a wash.
One caveat on the coverage list itself: it is not a map of the Caribbean. Alongside the seventeen Caribbean entries it carries seven South American countries and French Guiana. That is useful if your trip continues south, and irrelevant otherwise, but it explains why the coverage count is higher than the number of islands you will actually visit.
Eight well-known destinations that are not on the regional list at all
This is the mistake that costs people the most, because the destinations missing from the regional coverage list are not obscure. They are some of the most-visited places in the region.
The Bahamas is not on it. Aruba is not on it. Neither is Curaçao, Bonaire, Trinidad and Tobago, Bermuda, Haiti, or Belize. None of those eight appears on any multi-country plan we sell — not the regional Caribbean one, not the wider global ones. For each of them the island's own plan is not the better option, it is the only option, so the decision collapses to which size to buy.
Several of those are also in the upper price band, which compounds the problem. Aruba, Bonaire and Haiti are among the most expensive destinations in the whole range, and the Bahamas is not far behind. If one of those is your destination, the useful move is to be honest about how much data you will actually use rather than buying a large plan as insurance. Fixed monthly plans can be topped up mid-trip in a couple of minutes, so starting modest costs you nothing but a moment in your account if you run short.
Martinique is the odd one out in the opposite direction. It is covered by wider lists that reach beyond the Caribbean, but it is not on the regional Caribbean list, even though Guadeloupe is. Since Martinique is also at the floor price, this is academic for most people: buy the island plan.
Puerto Rico is the opposite again, and the most-covered destination in the region. It appears on the regional Caribbean list, on the South American regional list, and on both wide global lists. It is also cheap on its own, so for a Puerto Rico-only trip the island plan is still the buy — but if Puerto Rico is one stop on a longer route, there is a good chance whatever you already bought covers it.
The general discipline is the same one we give for every region and it matters more here than anywhere: open the coverage list on the plan you are about to buy and look for your specific island by name before you pay. The region has real gaps, they are not signposted by geography, and 'it is in the Caribbean' predicts nothing.
One island, two countries, and only one of them is buyable
Saint Martin is a single island of about thirty-four square miles with an international border across the middle of it. The northern half is French; the southern half, Sint Maarten, is a constituent country of the Kingdom of the Netherlands. There is no checkpoint, the road simply continues, and most visitors cross several times a day without noticing.
The two halves are completely different propositions on a price list. The French half is sold as its own destination at the floor price of the range, the same as Guadeloupe or metropolitan France. The Dutch half is not sold as its own destination at all.
This matters more than the acreage suggests, because most of what visitors arrive for is on the Dutch side. Princess Juliana International Airport is on the Dutch side. The cruise pier at Philipsburg is on the Dutch side. Maho Beach, with the aircraft passing overhead, is on the Dutch side.
If your stay is on the island, the practical approach is to buy the French plan, which is inexpensive enough that it is worth having regardless, and to treat coverage on the southern half as something to verify rather than assume. Phones near the border frequently pick up networks from the other half, which cuts both ways: you can find yourself connected where you did not expect it, and disconnected where you did.
The wider lesson generalises across the region. In the Caribbean, political geography and physical geography come apart constantly — a French department fifteen miles from an independent nation, a British overseas territory next to a Dutch one, an American territory an hour's flight from a Spanish-speaking republic. Coverage lists follow the political map, not the one in the ferry brochure.
Cuba, the US Virgin Islands, and a country that stopped existing in 2010
Three things in this region cannot be bought, and it is better to know before you are standing in an arrivals hall.
Cuba is not in the range. There is no Cuban plan and Cuba is not on any multi-country list we sell. Travellers to Cuba should plan for the local options on arrival and for hotel connectivity rather than expecting a travel plan to work there.
The US Virgin Islands — Saint Thomas, Saint John, Saint Croix — has no plan of its own either. This one surprises Americans in particular, because it is a US territory and it feels like it should be domestic. We will not tell you whether any particular wide plan reaches it, because that is not something we can state with confidence from the coverage lists as they are published; what we can tell you is that it is not sold as its own destination, so if you are heading there you should read the coverage list of whatever you are buying and look for it by name.
The third case is stranger. The regional Caribbean coverage list contains an entry called the Netherlands Antilles. That country was dissolved in October 2010 and split into Curaçao, Sint Maarten, Bonaire, Saba and Sint Eustatius. The entry survives on the coverage list as a legacy name, and there is no plan you can buy called that.
The tempting inference is that this entry quietly covers Curaçao or Bonaire, since those were part of it. Do not make that inference and do not let any seller make it for you. Curaçao and Bonaire are sold as their own destinations with their own prices, which is the strongest signal available about how they are treated. If you are going to either one, buy its own plan and you have removed the question entirely.
These three cases share a lesson that applies to the whole region: in the Caribbean, the absence of a destination from a coverage list is information, and it is usually the most reliable information available. A place that is genuinely covered is named.
Thirty days is the ceiling across the entire region
Every destination in this region shares a limit that trips up longer stays: nothing sold for any Caribbean island, and nothing on the regional plan, runs longer than thirty days. There is no ninety-day option, no one-hundred-and-eighty-day option, and no annual option anywhere in the arc.
For a week in Barbados this is irrelevant. For the people who spend a Caribbean winter — the sailing season through the Grenadines, a month in the Dominican Republic, a long stay in Bermuda — it is the constraint that shapes the whole purchase, and it is worth planning for rather than discovering in week five.
There are two workable approaches. The first is to buy a monthly plan and top it up when the data runs out, which adds data but does not extend the window. The second, for stays that run past a month, is to plan on a second purchase when the first plan's window closes. Neither is elegant, and we would rather say so than let you find out.
One shape to avoid outright on longer stays is the single-day option. The regional list has two of them and they are expensive relative to everything else on it; a single day of regional data costs more than a whole week of data on the same list. Single-day plans also cannot be topped up, so when one runs out mid-afternoon you are buying again from scratch rather than adding to what you have. They exist for a specific case — a day in port, a short layover — and they are the wrong shape for anything longer.
The fixed monthly plans, by contrast, can be topped up, which is what makes starting modest a safe strategy in an expensive region. Buy for what you expect to use, and add more from your account if the second week turns out heavier than the first.
One network, and what that means when the data is slow
Coverage advice written for Europe or East Asia usually includes some version of: if your data is slow, select a different network by hand. Across most of the Caribbean there is nothing to select.
Of the thirty Caribbean and adjacent destinations in the range, twenty-one carry 4G as their top speed with no 5G at all. That is the normal case here, not the exception, and it is worth setting expectations before you land rather than diagnosing a problem that is not one. Video calls, maps and messaging work fine on 4G. What changes is that the peak speeds people are used to at home are not available at any price.
The nine faster addresses are the Cayman Islands, Guadeloupe, Jamaica, Martinique, Puerto Rico, Saint Barthélemy, the French half of Saint Martin, French Guiana and, on the mainland, Costa Rica. Five of those nine are French or American territory, which is the same pattern that governs the prices.
The other structural fact is network count. Much of the Eastern Caribbean runs on a single network — FLOW is the operator listed for Anguilla, Antigua and Barbuda, Barbados, Dominica, Grenada, Montserrat, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Turks and Caicos and the Cayman Islands. Digicel is widely present across the region and is the second network on the British Virgin Islands. The Dominican Republic has Altice and Claro; Puerto Rico has Claro and Liberty; the Bahamas has BTC.
On a single-network island, manual network selection is not a tool you have. If the data is slow, the realistic levers are the ordinary ones: move outside or towards a window, check whether the phone has dropped to a slower generation, and accept that a small island at cruise-ship o'clock has a finite amount of capacity being shared by everyone who just walked down the gangway.
Signal also thins faster here than the map suggests. The interiors of Dominica and Saint Vincent, the windward coasts of several islands, and the passages between them on a boat are all places where coverage goes patchy. Downloading offline maps before a drive or a sail is the single habit that saves the most frustration, and it costs nothing.
What to buy, island by island
Putting all of it together, the Caribbean sorts into five groups, and knowing which group your island is in answers the question.
If you are going to Guadeloupe, Martinique, Saint Barthélemy, the French half of Saint Martin or French Guiana, buy that destination's own plan. It is at the cheapest price in the range, it is one of the faster networks in the region, and nothing wider will improve on it.
If you are going to the Dominican Republic or Puerto Rico, buy that destination's own plan too. Both are well below the regional price and well below their neighbours. Puerto Rico is also carried on several wider lists, so check what you already own before buying again.
If you are going to the British Virgin Islands, Grenada, Saint Kitts and Nevis, Saint Lucia or Saint Vincent and the Grenadines, buy the regional plan. It costs less than the island's own plan at the monthly sizes and covers two dozen other destinations as a bonus. Antigua and Barbuda and the Cayman Islands belong here for the smallest and largest monthly sizes only; at the size in between, their own plan is cheaper.
If you are going to two or more covered islands, buy the regional plan, unless one of your islands is Guadeloupe, the Dominican Republic or Puerto Rico — in which case compare, because separate plans may still win.
If you are going to the Bahamas, Aruba, Curaçao, Bonaire, Trinidad and Tobago, Bermuda, Haiti or Belize, buy that destination's own plan, because there is no multi-country alternative. These are the expensive ones, so size the plan to what you will actually use and top it up if you need more.
And whatever group you are in, do the thirty-second check before you pay: open the coverage list, find your island by name, and confirm the window is long enough for the trip you have booked. In a region where the price can move nine times between two islands you can see from each other, that check is the highest-value half-minute of the whole purchase.
Frequently asked questions
What is the best eSIM for the Caribbean?
There is no single answer, because the price varies more between Caribbean islands than in any other region. For a one-island trip to Guadeloupe, Martinique, Saint Barthélemy, the French side of Saint Martin, the Dominican Republic or Puerto Rico, that destination's own plan is clearly cheapest. For a one-island trip to the British Virgin Islands, Grenada, Saint Kitts and Nevis, Saint Lucia or Saint Vincent and the Grenadines, the regional plan costs less than the island's own plan. For two or more covered islands, the regional plan wins almost every time.
Which islands are covered by a Caribbean eSIM plan?
The regional plan covers twenty-five destinations. Seventeen are in the Caribbean: Anguilla, Antigua and Barbuda, Barbados, the British Virgin Islands, the Cayman Islands, Dominica, the Dominican Republic, Grenada, Guadeloupe, Jamaica, Montserrat, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Turks and Caicos, and a legacy entry for the former Netherlands Antilles. The remaining eight are South American: Argentina, Bolivia, Brazil, Colombia, Paraguay, Peru, Uruguay and French Guiana. Always check the live coverage list on the plan itself before buying, because catalogues change.
What is the best eSIM for the British Virgin Islands?
The regional Caribbean plan, which is genuinely cheaper than the British Virgin Islands plan at every monthly size while also covering two dozen other destinations. This is unusual — in most regions the single-country plan is the cheaper choice — but the arithmetic in the British Virgin Islands runs the other way at every size we sell. The islands run on two networks, Digicel and FLOW, both 4G.
What is the best eSIM for the Dominican Republic?
The Dominican Republic's own plan. It is one of the two cheapest entries on the regional Caribbean coverage list and costs a small fraction of the regional plan for the same amount of data, so there is no reason to buy wider coverage unless you are genuinely visiting another island on the same trip. Data there runs on Altice and Claro, both 4G. Punta Cana, Santo Domingo and Samaná are all well covered; the mountain roads inland are where signal thins.
Should I buy one Caribbean plan or one plan per island?
One plan per island if you are visiting exactly one island and it is one of the cheaper ones — Guadeloupe, Martinique, the Dominican Republic or Puerto Rico. The regional plan if you are visiting two or more islands, or if your single island is one of the dearer ones such as the British Virgin Islands, Grenada, Saint Kitts and Nevis, Saint Lucia or Saint Vincent. Comparing every possible pair of covered islands, the regional plan wins well over ninety percent of them, and for three islands it wins essentially all of them.
Why does data cost so much more in the Caribbean than in Europe?
Because most Caribbean destinations are small independent markets rather than parts of large ones. A month of data on a mid-range Caribbean island costs roughly seven to eight times what the same month costs in Western Europe. The exceptions prove the point: Guadeloupe, Martinique, Saint Barthélemy and the French half of Saint Martin are administratively part of France, ride French networks, and are priced identically to mainland France despite being in the middle of the Caribbean Sea.
Is there an eSIM for Aruba, Curaçao or the Bahamas?
Yes, each of them is sold as its own destination — but none of the three is on any multi-country plan, so the destination plan is the only option rather than the cheaper one. The same is true of Bonaire, Trinidad and Tobago, Bermuda, Haiti and Belize. All of these sit in the region's upper price band, so buy for the data you will realistically use and top up mid-trip if you need more, rather than buying a large plan as insurance.
Can I get an eSIM for Cuba?
Not from us. Cuba is not sold as a destination and is not on any multi-country coverage list in our range. If you are travelling to Cuba, plan around local options bought on arrival and around hotel and casa connectivity, and do not assume a travel plan bought for a neighbouring island will work there.
Is there an eSIM for the US Virgin Islands?
The US Virgin Islands is not sold as its own destination in our range, which surprises people because it is a US territory. We will not claim that any particular wider plan does or does not reach Saint Thomas, Saint John or Saint Croix, because that is not something the published coverage lists let us state with confidence. If you are travelling there, read the coverage list of whatever plan you are considering and look for it by name before you pay.
Which eSIM covers Saint Martin and Sint Maarten?
The French half, Saint Martin, is sold as its own destination at the cheapest price in the range. The Dutch half, Sint Maarten, is not sold as its own destination at all — which matters because the airport, the cruise pier at Philipsburg and Maho Beach are all on the Dutch side. There is no border checkpoint and phones routinely pick up networks from the other half, so treat coverage on the southern half as something to verify rather than assume.
Do Caribbean eSIM plans come with unlimited data?
The regional Caribbean plan has no unlimited option at all — its largest size is a ten-gigabyte month. Unlimited is sold on some individual islands, including the Dominican Republic, Guadeloupe, Martinique, Antigua and Barbuda, Anguilla, Barbados, Aruba, Bonaire, Curaçao and Haiti, but not on the British Virgin Islands, Grenada, Saint Kitts and Nevis, Saint Lucia, Saint Vincent, Dominica, Turks and Caicos, Jamaica, the Cayman Islands, Montserrat, the Bahamas, Bermuda, Trinidad and Tobago or Puerto Rico. Where it does exist on an expensive island it costs several times the largest fixed monthly plan there, so it is rarely the right shape.
Can I buy a Caribbean eSIM that lasts longer than a month?
No. Nothing sold for any Caribbean destination, and nothing on the regional plan, runs longer than thirty days — there is no ninety-day, one-hundred-and-eighty-day or annual option anywhere in the region. If you are staying a winter, plan on a second purchase when the first plan's window closes. Topping up a plan adds data but does not extend the window.
Which Caribbean islands have 5G?
Nine destinations in and around the Caribbean carry 5G: the Cayman Islands, Guadeloupe, Jamaica, Martinique, Puerto Rico, Saint Barthélemy, the French half of Saint Martin, French Guiana, and Costa Rica on the mainland. The other twenty-one destinations in the region are 4G at best. Five of the nine faster ones are French or American territory, which is the same pattern that governs the prices.
What is the best eSIM for Antigua, Saint Lucia or Grenada?
The regional Caribbean plan for all three, though for slightly different reasons. On Saint Lucia and Grenada it costs less than the island's own plan at every monthly size. On Antigua and Barbuda it wins at the smallest and the largest monthly size, while the island's own plan is cheaper at the size in between. All three run on FLOW as the listed network, on 4G, so there is no faster plan to buy and no second network to switch to if things are slow.