Best eSIM for Europe from the UK in 2026: Roaming Charges vs Travel eSIMs

Do you still pay to use your phone in Europe? A few years ago most of us didn't have to think about it. Now many UK plans charge you a daily fee as soon as you land in France or Spain. On a two-week trip that adds up quickly. So is it cheaper to pay your network's roaming charge, or to buy a travel eSIM?

I've compared the roaming rules of the big UK networks with some popular Europe eSIMs, so you don't have to. I also share what we did in Switzerland, where data from home can be really expensive. All prices are as of November 2026, and they change often, so always check before you book.

Quick answer

• Check your plan first. Some UK plans still include Europe roaming. If yours does, you may not need anything else.
• Daily roaming fees add up. For example, Three charges £2.75 a day on plans taken out since 18 December 2025. That is £38.50 for two weeks.
• Vodafone sells European Roaming Passes to pay monthly customers without Europe roaming: £16 for 8 days or £21 for 15 days.
• A Europe eSIM can be cheaper for longer trips or heavy data use. As of November 2026, Airalo's unlimited Europe eSIM costs €25 for 7 days and Holafly's costs $27.50 for 7 days.
• Many travel eSIMs are data only. Keep your UK SIM switched on for calls and bank texts, but turn off its data roaming.
• Switzerland is not in the EU. Check whether your plan or eSIM includes it. We bought a local Swisscom SIM at Zurich Airport.

Roaming in Europe from the UK in 2026

Each UK network now sets its own rules for Europe. Some plans include roaming, some charge a daily fee, and some offer passes. Here is what the official pages of two big networks say as of November 2026.

Three

• Some Three Your Way Value and Complete plans include roaming, and others come with daily Go Roam passes. Check your plan in the Three app.
• If your plan doesn't include it, Go Roam in Europe costs £2 a day if you joined or upgraded between 1 October 2021 and 17 December 2025.
• If you joined or upgraded on or after 18 December 2025, it costs £2.75 a day from 1 April 2026. Three says this is subject to annual price rises.
• Go Roam in Europe covers 49 destinations. Pay monthly customers can use up to 12GB of data a month there.
• There is no charge in the Republic of Ireland or the Isle of Man.

Vodafone

• All pay monthly plans include Zone A: the Republic of Ireland, the Isle of Man, Iceland and Norway.
• Zone B covers 47 European destinations, including France, Spain, Poland and Greece. Whether it is included depends on your plan.
• Pay monthly customers without European roaming can buy a pass: £16 for 8 days or £21 for 15 days. It lets you use your UK allowance in Zone B.
• The roaming fair use limit on pay monthly plans is 25GB.

EE, O2 and other networks

EE, O2, giffgaff, VOXI, Smarty and the other networks all have their own rules, and they depend on when you took out your plan. I couldn't check their 2026 prices on their official pages, so I won't guess. Open your network's app or roaming page before you travel. Look for three things: the daily or pass price, the fair use data limit and the list of countries.

What is a travel eSIM?

An eSIM is a digital SIM card. Instead of putting a plastic SIM in your phone, you install a data plan through an app or by scanning a QR code. Many phones can use your normal UK SIM and a travel eSIM at the same time. So you can use cheap local data from the eSIM while your UK number still receives calls and texts.

Before you buy one, check two things:

• Your phone supports eSIM. You can usually find this in your phone settings under SIM or mobile data.
• Your phone is unlocked. If you bought it from a network on a contract, it may be locked to that network.

I suggest installing the eSIM at home on Wi-Fi a day or two before you fly. Then you only need to switch it on when you land.

Popular Europe eSIMs compared

There are lots of eSIM brands now. These are two of the biggest names, with the prices from their own websites in November 2026.

You will also see names like Saily, Nomad and Ubigi. They work in a similar way, so compare the countries, data and days for your trip. If you mainly need maps and messages, compare a small fixed-data pack with the unlimited price.

Roaming or eSIM: which is cheaper?

Here is a simple comparison for a one-week trip using the prices above.

So the answer really depends on your plan. If roaming is included, just use it. If you pay a daily fee, a pass or an eSIM is often cheaper on longer trips. An eSIM also makes sense if your plan's fair use limit is low and you will use a lot of data. Also think about which countries you are visiting. Not every Europe plan covers the same list.

Switzerland and other non-EU countries

This is where you can get a nasty surprise. Switzerland is not part of the EU, so it may not be in your network's Europe zone. On our two-week trip I bought a local SIM card at Zurich Airport. Until you have a local SIM or an eSIM, make sure mobile data is turned off on your phone. Otherwise you can easily spend a fortune just using your phone.

We went with Swisscom, and the staff in the shop were really helpful and set it up for me. I paid CHF 20 for the SIM, which came with CHF 20 of credit. Internet cost CHF 2 a day, and only on days I used it. I was amazed by the connection. I had 4G even on mountain tops and in tunnels! As of 2026 it is still CHF 20 with CHF 2 a day for data, slowed after 10GB in 30 days. You can also get it as an eSIM, but you need your passport to register. You can read our full budget breakdown in how much our 2-week trip to Switzerland cost.

Other popular places for UK hikers are also outside the EU. Vodafone includes Iceland and Norway in Zone A, but other networks may not. Check before you go to Iceland or on a road trip to Preikestolen and Kjerag in Norway.

How to avoid a big phone bill abroad

• Check your plan before you go. Find out if roaming is included, the daily price and the fair use limit.
• Turn off data roaming on your UK SIM if you use an eSIM. Otherwise your phone may still use your UK data.
• Keep your UK SIM on for texts. Your bank may send one-time codes by text, and you don't want to be locked out of your account abroad.
• Use Wi-Fi where you can, for example at your accommodation, for big downloads and app updates.
• Download offline maps before hiking. There is often no signal in the mountains, whatever SIM you use.

Remember, a phone is not a rescue plan in remote places. If you hike or paddle off-grid, read my guide to the best personal locator beacons and emergency GPS devices.

FAQ

Is roaming free in Europe for UK customers?

Only on some plans. Each UK network sets its own rules. For example, Three charges £2 or £2.75 a day on many plans, and Vodafone sells 8-day and 15-day passes. Check your network's app before you travel.

Can I keep my UK number with a travel eSIM?

Yes, if your phone supports two SIMs at once. Keep your UK SIM switched on for calls and texts, and use the eSIM for data. Holafly says its Europe eSIM is data only, so you can't make normal calls with it. You can still use apps like WhatsApp.

Does a Europe eSIM work in Switzerland?

It depends on the eSIM. Check the country list before you buy. In Switzerland we used a local Swisscom SIM, which had a great signal even in the mountains.

When should I install my eSIM?

Install it at home on Wi-Fi before you fly, then switch it on when you land. Check the provider's rules on when the validity period starts, so you don't lose any days.

What is the best eSIM for Europe?

There isn't one best eSIM for everyone. If you just need maps and messages for a week, a small data pack or your network's pass may be cheapest. If you stream, hotspot or work online, an unlimited plan may suit you better. Always compare the countries covered.

How do you stay connected when you travel in Europe? Do you use an eSIM or your normal plan? Let me know in the comments!