Cheapest Way to Call Czech Republic from the UK
Every option compared honestly — WhatsApp, Rebtel, VoIP apps and eSIMs. The right answer depends on your situation, so we cover all of them.
Calling Czech Republic from Your UK Mobile
Your standard mobile network will charge 50p–£1.50 per minute for international calls to Czech Republic. Here are the two options that actually make sense.
Rebtel
The key advantage over WhatsApp: the person you're calling doesn't need a smartphone, internet connection, or any app. Rebtel routes your call over the internet on your end but delivers it as a normal phone call at the Czech Republic end. Rates from around 1–3p per minute.
WhatsApp (Free — with a caveat)
Completely free if the person you're calling has WhatsApp and a reliable internet connection. That caveat matters — if they have unreliable WiFi or data, call quality suffers. Best for regular calls to people you know are online.
Used Skype to call Czech Republic?
Microsoft shut Skype down in May 2025. The best direct replacement for calling Czech Republic landlines and mobiles is Rebtel — same principle, no account needed. For free app-to-app calls, WhatsApp is the natural replacement.
Travelling to Czech Republic? Avoid Roaming Charges
If you're visiting Czech Republic, your UK SIM will cost you significantly more than you expect. EE charges up to £8.45 per day for data outside Europe — which adds up to over £59 on a week's trip just for mobile internet. An eSIM costs a fraction of that and activates before you board.
Airalo
Best for most travellers. Buy a data plan before you leave, scan a QR code, and you have local data rates the moment you land in Czech Republic. No physical SIM swap, no queues at the airport. Plans start from around £3.
Holafly
Better for longer stays or heavy data users. Unlimited data plans mean you never worry about running out — useful if you're making lots of WhatsApp video calls home, using Google Maps constantly, or working remotely during your trip.
Use code ADM for 5% off any plan, or 10% off your first 12 months
Get a Czech Republic eSIM on Holafly →ℹ️ eSIMs are data-only — calls and texts still go through apps like WhatsApp. Your UK number stays active on your phone's physical SIM alongside the eSIM.
Calling Czech Republic from a UK Home Phone
You can still make cheap calls to Czech Republic from a landline — you just need to use Rebtel. Rebtel gives you a personal UK number to ring; your call goes via the internet on Rebtel's side but arrives as a completely normal phone call at the Czech Republic end. No internet needed in your home, and nothing needed at their end either.
Rebtel — from your landline
Sign up at Rebtel, get a dedicated UK number for Czech Republic, then dial that number from your home phone whenever you want to call. The person you're calling receives a normal phone call — no app, no internet, no smartphone needed at their end.
📋 BT Digital Voice switch-over (January 2027)
BT is migrating copper landlines to Digital Voice (internet-based) by January 2027. Rebtel works with Digital Voice landlines just as it does with copper — no changes needed on your end.
All Options at a Glance
Not sure which suits you? Here is a quick summary — use the cards at the top of the page to jump straight to the right section.
| Method | Typical Cost | Needs Internet | Best For |
|---|---|---|---|
|
|
Free | Both ends | Best if both online |
|
|
~1–3p/min | UK end only | Mobile & landline |
|
Standard UK Mobile
EE / O2 / Vodafone — international direct dial
|
50p–£1.50/min | No | Avoid — very expensive |
💡 The most important caveat on WhatsApp: it is genuinely free — but only works if the person you are calling also has a good internet connection. For calling elderly relatives or anyone without reliable WiFi or data, you need a paid option.
How to Dial Czech Republic from the UK
📞 Dialling format
Dial 00 + the country code + the full local number (omitting any leading zero).
Dialling code for Czech Republic
The dialling code for Czech Republic is +420.
When calling Czech Republic from the UK you must dial 00420 followed by the Czech Republic number in full.
When using our service to make cheap calls to Czech Republic, you need to:
- Dial the access number
- When you hear the voice prompt, dial the Czech Republic number starting with 00420
- When you have finished inputting the number, wait to be connected.
That’s it….easy!
Best time to call Czech Republic from UK
The time in Czech Republic is 2 hours ahead the time in the UK (GMT +2). On that basis the best time to call Czech Republic is 7am until 7pm UK time. The whole of Czech Republic is covered by a single time zone so you don’t need to worry about which part of Czech Republic you are calling.
Czech Republic Area Codes
| City | Czech Dialing Codes from UK |
| Brno | 00420 54 |
| Cheb | 00420 166 |
| Liberec | 00420 48 |
| Ostrava | 00420 69 |
| Plzen | 00420 377 |
| Prague | 00420 |
| Tabor | 00420 712 |
