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. One honest note for serious island-hopping: Cosmote (Deutsche Telekom) has the deepest reach on the smallest Aegean islands like Milos, Naxos, and Folegandros — worth knowing if the tiny islands are the whole point of your trip. For mainland Greece and the popular islands, you're covered at the best price.
Flysimio Greece eSIM
$1.43 from · instant QR · 7-day refund
Greece eSIM price index — August 2026
Across 4 providers and 16 plans compared in August 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 | Aug 14, 2026 |
| Flysimio | 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 | Aug 14, 2026 |
| Flysimio | 10 GB / 30 days | $10.70 | $1.07/GB | Vodafone / Wind | Live | |
| Flysimio | 20 GB / 30 days | $23.65 | $1.18/GB | Vodafone / Wind | Live | |
| Flysimio | 5 GB / 30 days | $5.95 | $1.19/GB | Vodafone / Wind | Live | |
| Flysimio | 3 GB / 15 days | $3.75 | $1.25/GB | Vodafone / Wind | Live | |
| Flysimio | 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 | Aug 14, 2026 |
| Nomad | 5 GB / 30 days | $11.00 | $2.20/GB | Vodafone / Wind | Easy app | Aug 14, 2026 |
| Nomad | 1 GB / 7 days | $4.00 | $4.00/GB | Vodafone / Wind | Easy app | Aug 14, 2026 |
| Airalo | Unlimited (3 GB/day) / 7 days | $27.00 | — | Nova | Coverage & app | Aug 14, 2026 |
| Holafly | Unlimited / 7 days | $27.50 | — | Vodafone Greece / Nova | Unlimited data | Aug 14, 2026 |
| Airalo | Unlimited (3 GB/day) / 30 days | $69.00 | — | Nova | Coverage & app | Aug 14, 2026 |
| Holafly | Unlimited / 30 days | $73.90 | — | Vodafone Greece / Nova | Unlimited data | Aug 14, 2026 |
| Flysimio | Unlimited (2 GB/day) / 30 days | $75.90 | — | Vodafone / Wind | Live |
- 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.
- 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.
- 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.
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 Aug 14, 2026 — www.nomadesim.com/greece-eSIM
- Airalo — checked Aug 14, 2026 — www.airalo.com/greece-esim
- Holafly — checked Aug 14, 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.
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
What is the best eSIM for Greece?
Flysimio is a strong Greece pick in 2026, running on Vodafone Greece and Wind rather than Cosmote — worth knowing if you are island-hopping, because Cosmote has the edge on the smaller Aegean islands. On price we were cheaper than Nomad at 5 GB in August 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.
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.