The short verdict
For Greece, Flysimio runs on Vodafone Greece and Wind and was the best value we found — Airalo costs nearly double for comparable data on similar networks. Athens, Thessaloniki, and the major islands (Santorini, Mykonos, Crete, Rhodes, Corfu) all have strong 4G/5G, so most trips are well covered. For serious island-hopping, Cosmote (Deutsche Telekom) has the deepest reach on the smallest Aegean islands like Milos, Naxos, and Folegandros — and our 31-day Europe plans (10, 20, or 50 GB) connect to Cosmote, Vodafone, and Wind in Greece, so you can have Cosmote coverage on Flysimio if the tiny islands are the point of your trip. For mainland Greece and the popular islands, the Greece plan covers you at the best price.
Flysimio Greece eSIM
$1.43 from · instant QR · 7-day refund
Greece eSIM price index — October 2026
Across 4 providers and 16 plans compared in October 2026, the cheapest Greece eSIM data on a standard 3–50 GB plan works out at $1.05/GB (Flysimio, priced live). On the same measure the cheapest rival plan is Nomad at $0.62/GB — cheaper than our best equivalent plan, which costs 69% more per gigabyte.
| Provider | Plan | Price | Price per GB | Network | Best for | Price checked |
|---|---|---|---|---|---|---|
| Nomad | 50 GB / 30 days | $31.00 | $0.62/GB | Vodafone / Wind | Easy app | Oct 8, 2026 |
| FlysimioBuy$52.50 | 50 GB / 30 days | $52.50 | $1.05/GB | Vodafone / Wind | Live | |
| Nomad | 20 GB / 30 days | $21.00 | $1.05/GB | Vodafone / Wind | Easy app | Oct 8, 2026 |
| FlysimioBuy$10.70 | 10 GB / 30 days | $10.70 | $1.07/GB | Vodafone / Wind | Live | |
| FlysimioBuy$23.65 | 20 GB / 30 days | $23.65 | $1.18/GB | Vodafone / Wind | Live | |
| FlysimioBuy$5.95 | 5 GB / 30 days | $5.95 | $1.19/GB | Vodafone / Wind | Live | |
| FlysimioBuy$3.75 | 3 GB / 15 days | $3.75 | $1.25/GB | Vodafone / Wind | Live | |
| FlysimioBuy$1.43 | 1 GB / 7 days | $1.43 | $1.43/GB | Vodafone / Wind | Live | |
| Nomad | 10 GB / 30 days | $18.00 | $1.80/GB | Vodafone / Wind | Easy app | Oct 8, 2026 |
| Nomad | 5 GB / 30 days | $11.00 | $2.20/GB | Vodafone / Wind | Easy app | Oct 8, 2026 |
| Nomad | 1 GB / 7 days | $4.00 | $4.00/GB | Vodafone / Wind | Easy app | Oct 8, 2026 |
| Airalo | Unlimited (3 GB/day) / 7 days | $27.00 | — | Nova | Coverage & app | Oct 8, 2026 |
| Holafly | Unlimited / 7 days | $27.50 | — | Vodafone Greece / Nova | Unlimited data | Oct 8, 2026 |
| Airalo | Unlimited (3 GB/day) / 30 days | $69.00 | — | Nova | Coverage & app | Oct 8, 2026 |
| FlysimioBuy$75.90 | Unlimited (2 GB/day) / 30 days | $75.90 | — | Vodafone / Wind | Live | |
| Holafly | Unlimited / 30 days | $76.50 | — | Vodafone Greece / Nova | Unlimited data | Oct 8, 2026 |
- Airalo · Unlimited (3 GB/day) / 7 days: Airalo bills this as "Unlimited": 3 GB per day at full speed, then throttled to about 1 Mbps. Airalo's Greece store lists unlimited packages only.
- Holafly · Unlimited / 7 days: Unlimited with no daily high-speed cap; Holafly applies a fair-use policy for at most one day at a time.
- Airalo · Unlimited (3 GB/day) / 30 days: Airalo bills this as "Unlimited": 3 GB per day at full speed, then throttled to about 1 Mbps.
- Flysimio · Unlimited (2 GB/day) / 30 days: 2 GB per day at full speed, then 1 Mbps. Sold as 1–30-day passes; 30 days is priced here for comparison.
- Holafly · Unlimited / 30 days: Unlimited with no daily high-speed cap; Holafly applies a fair-use policy for at most one day at a time.
How this table is priced. Flysimio prices are read live from our carrier catalog every time this page loads, so the figure here is the figure at checkout. Competitor prices are the US-dollar price shown on each provider's own site, read on the date in the last column and linked to the page we read it from; promotional prices are marked alongside the list price. Price per GB is the plan price divided by its included data — unlimited passes have no per-GB figure and are ranked by total price instead. Full method: how we test, the eSIM Price Index and what an eSIM costs.
- Nomad — checked Oct 8, 2026 — www.nomadesim.com/greece-eSIM
- Airalo — checked Oct 8, 2026 — www.airalo.com/greece-esim
- Holafly — checked Oct 8, 2026 — esim.holafly.com/esim-greece/
Cosmote vs Vodafone GR vs Wind/Nova
| Carrier | Coverage | Best for |
|---|---|---|
| Cosmote | Best overall, best islands | Any trip including Aegean and Ionian islands |
| Vodafone GR | Strong in mainland cities | Athens, Thessaloniki, Patras |
| Wind / Nova | Good urban, weak on small islands | Athens and major tourist islands only |
Coverage across Greece's top destinations
| Destination | Coverage | Notes |
|---|---|---|
| Athens | 5G on all carriers | Excellent coverage throughout the city and port of Piraeus |
| Santorini | 4G on Cosmote and Vodafone | Strong in Fira and Oia; caldera viewpoints covered |
| Mykonos | 4G on all carriers | Full coverage of Mykonos Town and beaches |
| Crete | 4G on Cosmote and Vodafone | Heraklion and Chania strong; rural south coast weaker |
| Rhodes | 4G on Cosmote | Rhodes Town and north coast strong; rural interior patchy |
| Corfu | 4G on Cosmote | Strong in Corfu Town; north coast good |
| Milos, Naxos, Folegandros | 4G on Cosmote | Cosmote is the only carrier with reliable signal on smaller islands |
| Thessaloniki | 5G on Cosmote and Vodafone | Strong throughout the city |
Staying online on the Aegean ferries
Island-hopping means hours on open water, and this is where every Greek eSIM behaves the same way: mobile signal comes from land-based towers, so it holds near port and along the coast, then fades mid-crossing on longer open-sea routes regardless of carrier. Short hops — Piraeus–Aegina, Santorini–Ios, Mykonos–Paros — keep 4G for most of the ride; long crossings such as Piraeus–Crete, Piraeus–Rhodes, and Piraeus–Milos go dark for stretches in the middle. Download your tickets, maps, and anything you need before you sail.
Can you use your American phone in Greece?
Yes, if it is unlocked. Some US plans include basic roaming in Greece, so check yours first. For island-hopping with full-speed data, add a Greece eSIM, which connects to Vodafone and Wind, and keep your US line on for calls and texts with data roaming off. Phone settings (data roaming, keeping your number) are covered step by step in how to use an eSIM abroad.
Greece is included in every tier of the Europe eSIM, so an Athens + Italy or Greece + Croatia trip can run on one plan.
Installing your Greece eSIM
- Buy before you fly — install on home Wi-Fi.
- Open the Flysimio email for the QR code.
- iPhone: Settings → Cellular → Add eSIM → Use QR Code.
- Android: Settings → Network & Internet → SIMs → Add SIM.
- Scan the QR code. Installation: under 30 seconds.
- Label it "Greece" and set it as your data line.
- Turn off Data Roaming on your home SIM only.
- Your phone connects to Cosmote when you land at Athens (ATH) or Thessaloniki (SKG).
Frequently asked questions
Can I use my US cell phone in Greece?
Yes, if it is unlocked. Install a Greece eSIM before you fly for data, and keep your US line on for calls and texts with data roaming off. Check your US plan first: some include basic roaming in Greece, and carrier day passes cost around $10–$12 a day.
Can you use mobile data in Greece?
Yes. Greece has strong 4G and 5G in Athens, Thessaloniki and on the popular islands, and a travel eSIM gives you data from the moment you land, with coverage thinning only on remote islets and at sea.
What is the best eSIM for Greece?
Flysimio is a strong Greece pick in 2026, with the Greece plan running on Vodafone Greece and Wind. Cosmote has the edge on the smaller Aegean islands, so island-hoppers can take one of our 31-day Europe plans instead, which add Cosmote. On price we were cheaper than Nomad at 5 GB in October 2026 but Nomad undercuts us per gigabyte on larger plans; the dated index above shows both. Airalo uses the same network but costs nearly double.
Does eSIM work on Greek islands?
Yes, on Cosmote. Cosmote has the best Greek island coverage — including Santorini, Mykonos, Crete, Rhodes, Corfu, and smaller islands like Milos, Naxos, and Folegandros. Wind and Vodafone have weaker signals on smaller islands.
Does eSIM work in Santorini?
Yes. Santorini has 4G LTE coverage on Cosmote and Vodafone GR throughout Fira, Oia, and Akrotiri. The caldera viewpoints and main villages are well covered. Remote hiking trails on the southern tip may have reduced signal.
Is Holafly good for Greece?
Holafly is a good choice for Athens and major islands but uses the Wind/Nova network, which has weaker signal on smaller Aegean islands. For island-hopping, Cosmote (Flysimio) is the safer choice.
Does a Greece eSIM work on ferries between islands?
At port and close to shore, yes. On open water between islands, eSIM signal depends on distance from land. On short routes (Athens–Aegina, Piraeus–Heraklion), 4G is available for much of the journey. On longer open-sea crossings, signal drops mid-route.
Do I need a Greece SIM card or can I use eSIM?
eSIM is the better choice for most visitors. It is cheaper than airport kiosks, no SIM-swapping required, and your home SIM stays active. The only reason for a physical SIM is if your phone does not support eSIM.
Flysimio Greece eSIM
$1.43 from · instant QR · 7-day refund
Sources & further reading
Maya Okafor
Senior Travel Connectivity Editor
Maya has tested eSIMs across 40+ countries over five years of full-time travel — from Tokyo subways to Patagonian backroads. She runs Flysimio’s hands-on network and speed testing.