Quick verdict: which Czech Republic eSIM to buy
Prague and the wider Czech Republic have dense, fast 4G/5G coverage, and O2 and T-Mobile keep prices low even on fixed-data plans. This is one of the rare countries where a small local competitor prices a fixed 10 GB plan close to Flysimio — worth knowing before you buy.
| Trip length | Recommended plan | Approximate cost |
|---|---|---|
| Long weekend in Prague | Flysimio 3 GB / 30 days | $5.75 |
| 1–2 weeks (Prague + Český Krumlov) | Flysimio 5 GB / 30 days | $8.50 |
| 2–3 weeks, remote work or heavy use | Flysimio 10 GB / 30 days | $15.25 |
| Extended stay | Flysimio 20 GB / 30 days | $24.75 |
Flysimio Czech Republic eSIM
$1.43 from · instant QR · 7-day refund
Flysimio Czech Republic eSIM plans
Most travelers pick the 5 GB / 30-day plan at $5.95 — about $1.19/GB, typically 40–50% cheaper per GB than Airalo for Czech Republic. Full live range (prices update hourly):
| Data | Validity | Price | Per GB |
|---|---|---|---|
| 1 GB | 7 days | $1.43 | $1.43/GB |
| 3 GB | 15 days | $3.75 | $1.25/GB |
| 5 GB | 30 days | $5.95 | $1.19/GB |
| 10 GB | 30 days | $10.70 | $1.07/GB |
| 20 GB | 30 days | $23.65 | $1.18/GB |
| 50 GB | 180 days | $71.18 | $1.42/GB |
Every plan: instant QR delivery, no physical SIM, and a 7-day money-back guarantee.
Czech Republic eSIM comparison (2026)
| Provider | Plan | Price | Carrier | Price/GB | Best for |
|---|---|---|---|---|---|
| Flysimio | 5 GB / 30 days | $5.95 | O2 | $1.19/GB | Lowest price |
| Flysimio | 10 GB / 30 days | $10.70 | O2 | $1.07/GB | Lowest price |
| Airalo | 10 GB / 30 days (data + calls + texts) | $16.00 | O2 | $1.60/GB | Coverage & app |
| Airalo | Unlimited / 30 days | $69.00 | O2 | Unlimited | Coverage & app |
Czech Republic coverage: Prague and beyond
- Prague Metro (lines A, B, C): 4G in stations and throughout tunnels between stations — a genuine rarity among European metros.
- Český Krumlov: solid 4G across the historic centre, the castle, and the Vltava riverbank.
- Bohemian Switzerland National Park (Hřensko, Pravčická Gate): 4G at the main tourist sites; deep gorge hiking trails thin to 3G.
- Karlovy Vary spa zone: 4G throughout.
- The Prague–Brno D1 motorway: continuous 4G along the route.
Frequently asked questions
What is the best eSIM for the Czech Republic?
Flysimio and Airalo are close in price for fixed-data plans here — Flysimio's 10 GB plan is marginally cheaper unless you specifically want Airalo's bundled calls and texts, which are worth a small premium if you need a Czech number.
Does the eSIM work on the Prague Metro?
Yes. All three Prague Metro lines (A, B, C) have 4G in stations and throughout tunnels between stations — most European metros don't manage in-tunnel coverage this well.
Is there coverage in Český Krumlov?
Yes. The historic centre, the castle, and the Vltava riverbank all have solid 4G.
Does this eSIM work in Bohemian Switzerland National Park?
Yes at Hřensko village and Pravčická Gate, the largest natural arch in Central Europe. Deep gorge hiking trails thin to 3G.
What currency does the Czech Republic use?
Czech koruna (CZK / Kč) — the Czech Republic is an EU member but has not adopted the euro. Most tourist venues accept card payments.
How much data do I need for a week in Prague?
For typical use — maps, messaging, and photos — 3 GB comfortably covers a long weekend, and 5 GB covers a full week to ten days.
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.