Best eSIM for the UK (2026): Prices Compared, Plus the Cheaper Local Options

Updated October 2026 · Airalo and EE prices checked on their websites on 16 October 2026 · Saily and Yesim prices from eSIMDB (updated 4 October 2026)

Disclosure: this guide contains affiliate links. If you buy an eSIM through them, WingReserve may earn a commission at no extra cost to you. The UK is one of the few countries where local options are often cheaper than travel eSIMs, and we show you those too, even though we earn nothing from them. How this works

Arrive at Heathrow and you'll need data before you've even found the Tube: to check which train to take, to pay contactless fares and track your route, and to message your hotel. The good news is that staying connected in the UK is easy and, compared with most countries, cheap. The catch is that there are more options than anywhere else in Europe, and the best one depends on how long you're staying and how much data you use.

This guide compares the three travel eSIMs most visitors look at (Airalo, Saily and Yesim) plan by plan. It then shows the two UK options eSIM sellers rarely mention: EE's own visitor eSIM and the British pay-as-you-go SIMs sold in every supermarket. By the end you'll know exactly which one to buy for your trip.

UK eSIM Prices Compared: Airalo vs Saily vs Yesim

Prices are in US dollars for UK-only plans. Validity is shown under each price, because a cheap plan that expires after 3 days is no bargain on a week in London. The cheapest price in each row is highlighted.

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Sources: Airalo unlimited prices from airalo.com (16 October 2026); Airalo fixed-data, Saily and Yesim prices from eSIMDB (updated 4 October 2026). Yesim's prices are converted to dollars, so the exact amount depends on your currency. Prices change often; the checkout page always shows the current price.

The Best eSIM for the UK, by Type of Traveller

1Best value: Yesim

• 10GB / 30 days: about $18
• Every fixed plan lasts 30 days
• Europe & UK at the same price

Why it stands out: in our comparison Yesim was the cheapest for every fixed-data size and for most unlimited plans. Its fixed plans all last 30 days, so you won't lose data because a plan expired before your trip ended. Its Europe & UK plans cost the same as UK-only ones for 1GB to 20GB, which makes it the easy choice if you're also visiting Paris or Amsterdam.

2Best if you need a UK number: Airalo

• Runs on EE
• Uki Mobile+ includes a +44 number
• Unlimited 7 days: $27

Why it stands out: Airalo's UK eSIM runs on EE, according to its UK page. Its Uki Mobile+ plans add a UK +44 number with calls and texts, from $5 for 1GB over 3 days, or $14 for 5GB over 7 days. That's useful if you need to receive a text from a UK bank or a restaurant booking, or call a taxi firm. It also had the cheapest 7-day unlimited plan of the three.

3Best for heavier daily use: Saily

• Unlimited: 5GB/day full speed
• Fixed plans up to 20GB

Why it stands out: Saily's UK unlimited plans give 5GB of full-speed data a day before slowing, more than Airalo's 3GB, for nearly the same price. If you'll use a lot of data on some days, that headroom matters. London Travel Geek also reports that Saily allows hotspot use and gives you 180 days to activate the plan.

The Cheaper Local Options Most eSIM Guides Skip

Prepaid mobile data in the UK is cheap, and visitors can use it too. There are two ways.

EE Travel eSIM: truly unlimited, from the UK's own network

EE, one of the UK's main networks, sells a data-only eSIM made for visitors. You buy it online before you travel, and you have 90 days to start using it. Unlike the travel eSIMs above, the data is unlimited with no speed cap:

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Source: ee.co.uk, checked 16 October 2026.

The trade-offs: it's data-only (no number and, on Android, no SMS), your phone must be unlocked, and all plans block 18-rated content, a setting you can't change. For most visitors who want unlimited data, those don't matter, and it beats every unlimited travel eSIM in our table on price.

A UK pay-as-you-go SIM: the most data for the money

British prepaid SIMs aren't registered, so you don't normally need ID to buy one. Starter SIMs are sold in supermarkets, newsagents and phone shops. Examples from London Travel Geek's September 2026 price check:

• Three: £10 for 40GB for a month, with a UK number. Also available as an eSIM.
• Lebara (Vodafone network): £5 for 5GB, or £10 for 30GB, for 30 days.
• EE pay-as-you-go: £10 for 20GB for 30 days.

The trade-offs: you need to find a shop after you land; airport shops charge more, according to the same guide. Some networks' online payments reject foreign cards, and a physical SIM replaces your home SIM unless your phone has two slots.

How Much Data Do You Need in the UK?

Less than you'd think. Hotels, cafés and many attractions have free Wi-Fi, and what really uses mobile data is video, not maps or messages.

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Planning ranges, not measurements. All three travel eSIM providers let you top up in the app if you run low.

Visiting the UK and Mainland Europe? Get a Europe & UK Plan

The UK isn't in the EU, so an EU-only plan won't work there, and if your phone plan is from an EU country, EU roaming rules don't cover you in the UK either. If your trip combines London with Paris, Amsterdam or Rome, one regional plan that includes the UK is simplest. For 10GB over 30 days, the prices we found were:

• Yesim Europe & UK: $17.92, the same price as its UK-only plan.
• Airalo EUconnect: $24. Airalo's Eurolink, which covers more countries, is $31.
• Saily Europe: $35.99.

Before buying, open the plan's country list and check every country on your route. Heading to Italy too? See our best eSIM for Italy guide.

How to Set Up Your UK eSIM Before You Fly

1. Check your phone supports eSIM and is unlocked. EE's compatibility guide says iPhone XS, XS Max, XR and later models are compatible (except iPhones made for mainland China). On Android, dial *#06#: if an EID number appears, your phone supports eSIM.
2. Buy and install at home, on Wi-Fi. Installing needs internet, so don't leave it until you land. Check your plan's activation rule; most only start counting days when they first connect in the UK.
3. Label your lines "Home" and "UK" so you know which is which.
4. When you land: set mobile data to the UK eSIM and switch on data roaming for that line. Travel eSIMs connect as roaming, so they won't work without it.
5. Turn off data roaming on your home line, but keep the line on so you still receive bank codes by SMS.

Five Mistakes to Avoid

• Buying a SIM at the airport. Airport shops and vending machines tend to charge more than supermarkets and network shops.
• Paying for "unlimited" travel eSIM data you can't use at full speed. If you need unlimited, EE's visitor eSIM has no daily cap.
• Choosing a 3- or 7-day plan for a longer trip. Check validity before data.
• Assuming EU roaming covers you. The UK isn't in the EU; check your own plan's UK rules before you rely on it.
• Leaving data roaming on for your home line. Background app updates can cost more than the whole eSIM.

UK eSIM: Frequently Asked Questions

Airalo's UK unlimited prices and network, and EE Travel eSIM prices and terms, were checked on airalo.com and ee.co.uk on 16 October 2026. Airalo fixed-data prices and Saily and Yesim prices are from eSIMDB's UK listings, updated 4 October 2026; eSIMDB notes its data updates automatically and may not be complete. UK pay-as-you-go prices and buying tips are from London Travel Geek (prices checked 14 September 2026). Always confirm the current price and terms on the provider's page before buying.