Reunion (La Réunion) is one of those destinations that will throw you off: you're in the middle of the Indian Ocean, between Madagascar and Mauritius, but you're on French and European soil. This changes everything when it comes to having internet in Reunion compared to its neighboring islands. In this guide, I'll tell you the good surprise: as an overseas department of France, your Spanish EU tariff travels with you almost as if you were in Madrid. I'll review all the real options—your own tariff, Wi-Fi, a local Orange or SFR SIM, and a travel eSIM—coverage across the island, and when it pays to have extra data for hiking trails.
Internet in Reunion: the quick answer
In Reunion, your Spanish tariff with EU data works without surcharge because the island is French and European territory. For most people, this is enough. You only need a travel eSIM if your plan includes limited data or if you plan to use maps extensively on your routes.
That's the short version, and it already suggests that Reunion plays in a different league than Mauritius or Seychelles: roaming charges soar there, but not here. As an overseas department of France, it falls into the same "like at home" zone as mainland France, so your gigabytes cross the Indian Ocean with you at no extra cost, within reasonable usage limits that almost no tourist reaches.
So, why complicate things? For three very specific reasons: because your tariff has limited data and in Reunion, you'll be walking with your GPS on for hours; because your plan isn't an "EU" type (or you're coming from outside the Union); or simply because you want plenty of data without monitoring your usage. In these cases, a local data SIM provides peace of mind. In the following sections, I'll break down each option with prices, coverage, and real nuances, so you can make an informed decision.
Reunion is France: why you have an EU tariff
Here's the key that almost no one understands before flying. Reunion is not a foreign country: it is a French overseas department (DOM), with the same status as mainland France. And since France is in the European Union, Reunion is one of the outermost regions of the EU, just as the Canary Islands are to Spain or Madeira to Portugal. Although it appears on the map 9,000 km from Europe, right next to Madagascar, for telephony purposes it counts as EU territory.
What does this mean for you? That the European "roam like at home" regulation applies, the same one that allows you to use your data in France, Italy, or Germany without paying extra. When you land, your mobile connects to Orange, SFR, or Free—the local operators—and you continue to use your Spanish allowance at the usual price. No international rates of several euros per megabyte, as is the case in neighboring Mauritius, which despite being half an hour away by plane is already outside the EU.
It's a huge and little-known advantage: you can find yourself on an active volcano in the Indian Ocean and reply to WhatsApp messages with your local neighborhood tariff. That said, it's worth knowing the fine print of this free roaming, because it does have conditions. We'll look at this in the next section.
All options at a glance
Before we go into detail, here's the complete overview. In Reunion, there are four realistic ways to get connected, and because the starting scenario—your EU tariff working for free—is so good, the balance shifts compared to other destinations. Pay attention to the "who it's for" column, because the best option depends heavily on your mobile plan in Spain.
| Option | Approximate price | Process | Who it's suitable for |
|---|---|---|---|
| Your Spanish tariff (EU zone) | Free, included in your plan | None | Most people: plans with plenty of data |
| Accommodation Wi-Fi | Free | None | Support at the hotel, never outside |
| Local SIM (Orange, SFR, Free) | ~€20-40 for 10-50 GB | Medium: document in-store | Long stays or high consumption |
| Travel eSIM | From ~€10 for a few GB | None: QR and ready | Short data plans or coming from outside the EU |
As you can see, the novelty compared to a "normal" destination is that the first row is no longer a trap: here, your own tariff is a full-fledged option and, for many, the winner. The local SIM and travel eSIM come into play when your allowance is insufficient. A pocket router is almost irrelevant on an island with good mobile coverage; if you're traveling in a large group and still consider it, check the comparison of eSIM vs. pocket Wi-Fi.
Your Spanish tariff: free, but with fine print
This is the star option in Reunion, so it deserves a good explanation. With a Spanish tariff that includes "EU roaming"—which is the vast majority today—when you land, you continue to use your calls, SMS, and data at the same price as at home. You don't have to activate anything or install anything: your mobile connects to the local network automatically. For a week's vacation with normal use, this is usually sufficient and costs nothing.
Now, the three nuances you should check before flying. First, the fair usage policy: operators set a data cap for roaming linked to the price of your tariff, so a cheap plan with many gigabytes might have less available outside Spain than you think. Second, permanent use: roaming is intended for travel, not for living abroad for months; if you spend more than a few weeks, they might notify you. Third, and very important:
Some low-cost tariffs expressly exclude overseas departments (Reunion, Guadeloupe, Martinique) from their EU zone, or place them in a separate zone. Check your operator's terms for Reunion before assuming it's free.
The recommendation is simple: go into your operator's app and look for "Reunion" or "DOM" in the roaming conditions. If it appears within the European zone and your plan has plenty of data, then you're all set: you don't need anything else. If you get confused with the zones, it helps to read how much international roaming costs.
When a travel eSIM is still worthwhile
Just because you have free roaming doesn't mean it's always the best idea. There are three clear profiles for whom a travel data eSIM is still worthwhile, even if your tariff is from the EU, and it's good to see if you're one of them before discarding it.
- Your plan has limited data. Reunion is pure hiking: GPS for routes, updating offline maps, uploading photos... these burn through gigabytes quickly. If your Spanish plan includes 5 or 10 GB and you already use them at home, you'll run out on the island, and a data eSIM with plenty of data will save you from frustration.
- Your plan is not "EU-compatible" or you're coming from outside. If you're traveling with a tariff that excludes DOMs, or you live outside the EU (Latin America, UK, etc.), you won't have free roaming and will incur expensive international rates. In that case, a travel eSIM is your savior.
- You want plenty of data with no monitoring. Some prefer not to check their usage or worry about fair use. A generous, separate plan offers that peace of mind.
The big advantage of a travel eSIM is that you buy it from home, install it with a QR code, and arrive with active data, without touching your physical card. If this is your first time, start with what an eSIM is and then check out the eSIM guide for Reunion, with step-by-step installation and compatible phones.
Accommodation Wi-Fi: support, not the main pillar
Almost all hotels, gîtes, and accommodations in Reunion offer free Wi-Fi, and the temptation is to think, "I'll manage with that." It works as support, but building your entire trip around it is a mistake, especially on an island where you'll spend all day outside, hiking through the cirques or climbing the volcano.
The first limitation is always the same: hotel Wi-Fi stays at the hotel. As soon as you hit the road on the west coast, head to the Saint-Paul market, or embark on a mountain trail, you lose signal. And in Reunion, the real appeal is outside the accommodation, not in your room. The second limitation is quality: in many mountain gîtes and ecolodges, the connection is slow, intermittent, or only reaches common areas. Don't rely on it for a work video call or uploading large videos.
My advice is to use it for what it's good for: downloading offline maps and GPX tracks for the next day's routes at night, syncing photo backups, and streaming something without using your data. For everything else—moving around, browsing, sharing on the go—you need your own connection, whether it's your EU tariff or a data eSIM. Wi-Fi is the perfect complement, never the primary plan.
Local Reunion SIM: Orange, SFR, and Free
If you're staying for a long time or have high data consumption, a local SIM is a solid alternative. Four networks operate in Reunion—Orange Réunion, SFR Réunion, Free, and Telco OI (Only)—with stores in Saint-Denis, Saint-Pierre, and coastal shopping centers. Orange has the most extensive network, including part of the cirques; Free is usually the cheapest for data. Roland Garros airport has fewer options than city stores, so many people buy their SIM in town.
Since it's France, to activate a SIM, you need to identify yourself with a document (ID card or passport), which is a slightly more formal process than in other beach destinations. Reference prices for 2026 are approximately:
- Orange: prepaid packages from around €20 with approximately 10 GB, with the advantage of the best coverage in inland areas.
- SFR: competitive options for tourists with generous data blocks for a similar price.
- Free: the most economical per gigabyte, ideal if you need a lot of data and you're moving around the coast.
The "but" isn't the price, which is fair, but the logistics: taking out your Spanish card, storing it, inserting the new one, and losing your Spanish number (unless you have a Dual SIM). Since you already have free EU roaming in Reunion, a local SIM only really pays off if you're going to consume a lot or stay for weeks. I compare it in detail in eSIM vs. local SIM.
Local SIM vs. eSIM, face to face
When your EU tariff falls short and you need to boost your data, the real decision is between a local Reunion SIM and a travel eSIM. Both use the same networks, so the signal is identical: what changes is convenience, paperwork, and whether you keep your number. This table compares them.
| Criterion | Local SIM (Orange / SFR / Free) | Travel eSIM |
|---|---|---|
| Price | ~€20-40 for 10-50 GB | From ~€10, depending on days and GB |
| Documents | ID or passport in-store | None |
| Where to buy | Physical store in Reunion, in person | Online, from home, before flying |
| Time to get data | Go to the store and activate | Minutes: scan QR and done |
| Network used | Orange, SFR, Free, or Telco OI | The same local network |
| Your Spanish number | Lost with a single slot | Remains active with Dual SIM |
My take for Reunion: if you're staying for a month or consuming 40-50 GB, a Free or Orange prepaid plan is very worthwhile. But for the typical traveler—one or two weeks of trails and beaches who just wants to boost their data—the travel eSIM wins for convenience: you install it at home, arrive with data, don't change your physical SIM, and keep your Spanish number active for bank SMS. No queues or hassles after an eleven-hour flight.
Coverage: coast, cirques, and the volcano
Reunion is a small but brutally mountainous volcanic island, and that affects its coverage. The good news: 4G covers about 98% of the coastal population and all major towns—Saint-Denis, Saint-Paul, Saint-Pierre, Saint-Gilles-les-Bains—with 5G already present in urban areas. The coast, where you sleep and drive, is well covered. The problem arises inland, and there it's wise to be prepared.
- Coast and cities: reliable and fast coverage. West coast beaches (Saint-Gilles, L'Hermitage), capital, and coastal roads, no surprises.
- The three cirques: Cilaos and Salazie have signal in the villages and road accesses, although with dead spots in the gorges. Mafate is a different story: it has no roads, can only be accessed on foot or by helicopter, and there is virtually no coverage throughout the cirque.
- Piton de la Fournaise: the active volcano and the route to Pas de Bellecombe have very irregular coverage; on the ascent to the crater, expect to lose signal.
The golden rule for hiking in Reunion: always download offline maps and GPX tracks before heading out, especially if you're going down to Mafate or up the volcano. No SIM card, local or digital, will give you signal where there isn't any. For daily life on the coast, however, coverage is more than adequate for any use.
How much data you need in Reunion
Before buying anything, calculate by days and by actual usage. In Reunion, you'll mostly spend data on maps and GPS for routes—the big data hog here—messaging, social media to show off the cirques, and some videos. That's why consumption tends to be a bit higher than on a purely beach trip. This table gives you a reference by activity and day.
| Daily activity | Approximate consumption |
|---|---|
| WhatsApp and messaging | ~20-50 MB/day |
| Hiking maps and GPS | ~100-250 MB/day |
| Social media (scrolling and stories) | ~150-300 MB/day |
| Uploading photos and some videos | ~200-400 MB/day |
| Video call (30 min) | ~300-500 MB |
| Video streaming (1 h) | ~1 GB |
Summing up active tourist use, it comes to about 600 MB to 1 GB per day. With that reference, for a week of trails, 5-7 GB would be good; for two weeks exploring the island, a 10-15 GB plan would be comfortable; and if you're going to telework, livestream, or rely on GPS daily, aim for 20 GB or more. Remember to leave heavy streaming and photo backups for your accommodation's Wi-Fi at night: that way, you stretch every gigabyte, whether you have your EU tariff or a separate travel eSIM.
Frequently asked questions
Do I have free EU roaming in Reunion?
Yes. Reunion is a French overseas department and, therefore, European Union territory. With a Spanish tariff that includes the EU zone, you use your data, calls, and SMS without surcharge, just like on the mainland, subject to your operator's fair usage policy.
So, do I need an eSIM if I go to Reunion?
Not always. If your tariff has plenty of gigabytes, EU roaming is sufficient. A travel eSIM is worthwhile if your plan has limited data, if your tariff excludes DOMs, if you're coming from outside the Union, or if you want abundant data without monitoring your usage during your routes.
Does my low-cost tariff include Reunion in the EU zone?
Almost all do, but some low-cost tariffs exclude overseas departments or place them in a separate zone with a surcharge. Before flying, search for "Reunion" or "DOM" in your operator's roaming conditions to confirm and avoid bill shocks.
Is there coverage in Mafate and on the volcano?
Practically none. The cirque of Mafate has no roads or coverage: you enter on foot or by helicopter. On Piton de la Fournaise, the signal is very erratic. Download maps and GPX tracks offline before you go; no card will give you a signal where there isn't one.
Where can I buy a local SIM in Reunion?
In Orange, SFR, or Free stores in Saint-Denis, Saint-Pierre, and coastal shopping centers; Roland Garros airport has fewer options. Since it's France, you'll need an ID document to activate it. Prepaid plans range from €20-40 for 10-50 GB.
How many GB do I need for a week of hiking?
For active use with a lot of hiking GPS, messaging, social media, and some photos, 5-7 GB will be fine for a week. For two weeks touring the island, a 10-15 GB plan will be ample. If you work remotely or do live streams, choose 20 GB or more.
Does the eSIM work as soon as I land in Reunion?
Yes. You install the plan from home with the QR code and activate it upon landing, so you leave the airport with data and without changing cards. It relies on the local networks of Orange, SFR, or Free, the same coverage an island resident would have.
Is a local SIM better or should I stick with my Spanish plan?
If your plan includes the EU and you have plenty of gigabytes, stick with it: it's free and you don't change anything. A local SIM only pays off for long stays or very high consumption (40-50 GB). For temporary boosts, an eSIM is more convenient because you keep your number.
Conclusion
The great news about Reunion is that you don't have to struggle with international rates here: since it's France, and therefore part of the European Union, your Spanish EU plan travels with you without extra charges, despite being in the middle of the Indian Ocean. For most travelers, that's enough and at no cost. A digital travel card comes into play when your allowance runs short for so much hiking GPS, when your plan doesn't cover the DOMs, or when you're coming from outside the Union. And remember the essential thing about this volcanic island: on the coast, you'll have plenty of coverage, but in Mafate and on the volcano, you'll lose signal, so always have your maps downloaded. Before flying, check if your operator includes Reunion in the European zone; if not, or if you want plenty of data without watching the meter, check out the eSIM for Reunion and compare it with your current roaming.
