O2 roaming in 2026: free in Europe, £7 a day further away

O2 includes Europe roaming up to 25 GB on pay monthly and pay as you go. Further away, O2 Travel costs £7 a day. See when a travel eSIM is cheaper.

O2 includes roaming in Europe on pay monthly and pay as you go plans, with no daily charge, up to 25 GB of data a month. Outside Europe, the O2 Travel Bolt On costs £7 a day in 75 destinations, charged only on days you use your phone. A travel eSIM costs one upfront price for the whole trip, and your O2 number keeps working for calls and texts.

How O2 roaming works

Europe: included, using your UK allowance up to 25 GB a month. Past that, buy a data bolt on.

O2 Travel: £7 a day for unlimited calls, texts and data in 75 destinations, with speeds capped at 2 Mbps.

Other countries: standard roaming rates, which can be expensive. Check O2's list before you go.

What a trip costs

One week in Portugal: nothing extra, within 25 GB.

One week in the US: about £49 on O2 Travel.

Two weeks in Thailand: about £98 on O2 Travel.

When a travel eSIM is better

Trips outside Europe, where a week of O2 Travel costs about £49.

Heavy data use in Europe, above the 25 GB limit.

When you need faster speeds than O2 Travel's 2 Mbps cap.

How to switch to a travel eSIM

Check that your phone is unlocked and supports eSIM on our supported devices page.

Buy a plan for your destination and install it at home on Wi-Fi. It takes about two minutes.

When you land, turn on the travel eSIM, choose it for mobile data and turn on data roaming for it.

Keep your O2 line on for calls and texts, with its data roaming off, so no pass or daily charge starts.

Bottom line

In Europe, O2 customers usually need nothing extra. For the US, Thailand and other places outside Europe, a travel eSIM usually costs less than O2 Travel. Find a plan for your destination.

Prices checked on 1 November 2026. Carriers change roaming prices often, so check your own plan before you travel.