Choose a data plan for your trip
Select your destination and buy your travel eSIM data plan. Pay with card, Apple Pay, Google Pay, or PayPal — no account hoops.
United Kingdom eSIM
A Flylo unlimited-data eSIM for United Kingdom is from $1.97/day — around 49% below Holafly's lowest unlimited rate ($3.90/day). It runs on Three UK and O2 UK and Vodafone UK at up to 5G, and installs from your browser in about 60 seconds — no app to download.
Choose your eSIM data plan for United Kingdom:
How many travelers?
One eSIM per person
1
Buy before you fly — your plan only starts when you first connect in United Kingdom.
Visiting more than United Kingdom?
Secure checkout
- Unlimited 4G/5G
- Works in 190+ countries
- Install in 60 seconds
- Tether / hotspot included
- Ultra-fast internet anywhere you travel
United Kingdom eSIM: Flylo vs Holafly vs Airalo
Flylo's unlimited United Kingdom eSIM is around 49% cheaper per day than Holafly's lowest advertised unlimited plan.
| Provider | Plan | Lowest advertised price |
|---|---|---|
| Flylo | Unlimited data | from $1.97/day |
| Holafly | Unlimited data | from $3.90/day |
| Airalo | 1 GB - 3 days (capped) | from £3.50 |
Competitor prices checked automatically from their public pages — last checked 2026-07-13. Flylo prices are our live rates. Comparison is each provider's lowest advertised price for an eSIM in United Kingdom; competitors' plans differ in data and duration.
Cheapest United Kingdom eSIM → · eSIM Price Index → · Flylo vs Holafly →
Networks & coverage in United Kingdom
Your Flylo eSIM connects to United Kingdom's leading mobile networks, with speeds up to 5G where available:
- Three UK2G / 3G / 4G / 5G
- O2 UK2G / 3G / 4G / 5G
- Vodafone UK2G / 3G / 4G / 5G
Coverage is excellent across cities, large towns, motorways and mainline rail, with 5G widespread in urban areas; the weak spots are remote rural regions such as the Scottish Highlands and islands, mid-Wales, the Lake District and open moorland, where signal on any network can be patchy.
Staying connected in United Kingdom
The UK is one of the easiest places in Europe to stay online. Your Flylo eSIM connects to Three UK, O2 UK or Vodafone UK, picking up whichever gives the strongest signal wherever you happen to be. Across London and the major cities — Manchester, Birmingham, Edinburgh, Glasgow, Cardiff and Belfast — 4G is effectively everywhere and 5G reaches most central areas, so maps, ride-hailing apps and video calls hold up while you're on the move. Mobile coverage is also being rolled out across the London Underground, so you're no longer cut off between stations on much of the network.
Step outside the towns and it becomes more mixed. Motorways and mainline rail routes are generally well covered, though signal can drop in tunnels, deep railway cuttings and long stretches of open countryside. The known weak spots are the genuinely remote parts — the Scottish Highlands and islands, mid-Wales, the Lake District fells and stretches of Cornish and Pennine moorland — where any network can thin out to a single bar or nothing at all. If you're heading somewhere rural, download offline maps and any tickets or boarding passes before you set off.
For everyday city and town travel, though, you can expect a fast, reliable connection the moment you land. Install the eSIM before you fly and it activates automatically on arrival, with no local SIM to hunt down and no app to set up.
Setting up your United Kingdom eSIM
Install the eSIM before you travel, then keep it as your data line and turn Data Roaming ON for it once you arrive — the eSIM works by roaming onto the UK networks, so it won't pull data without that toggle. It then registers automatically, usually within a minute or two of landing.
How much data will you need?
As a rough guide, five days of maps, messaging and social media is around 3-5 GB, and that climbs quickly once you add streaming or frequent video calls. Estimate your trip with our data calculator →
How to get an eSIM for United Kingdom
Three steps. No SIM swap, no waiting at the airport, no roaming bill shock.
Set up your eSIM
One tap on a modern iPhone (iOS 17.4+) or Android — your eSIM installs straight into Settings. No app required if you don't want one.
Land in United Kingdom, you're online
Your plan activates the moment your phone connects to a local tower. Your home SIM stays active for calls + texts; Flylo handles data.
How Flylo stacks up
Real comparison against the four big eSIM providers — same destination, same plan length.
| Feature |  |
 |
 |
||
|---|---|---|---|---|---|
| Unlimited data plans | |||||
| From $1.97 / day | |||||
| No app required to install | |||||
| Apple Pay + Google Pay + PayPal | |||||
| Tether / hotspot included | |||||
| 5G where carriers support it | |||||
| Cheaper than competitors | |||||
| Refunds if it doesn't work |
Get the Flylo app
Same eSIMs, same prices — plus saved plans, in-app install, and a single tap to top up when you cross a border. Free on iOS & Android.
Travelling beyond United Kingdom?
Popular eSIM destinations travellers pair with United Kingdom:
FAQs about eSIMs for United Kingdom
Will a Flylo eSIM work in the UK?
Yes. It connects to Three UK, O2 UK or Vodafone UK, so you'll have mobile data across the country the moment you arrive — no local SIM to buy and no app to install.
Does it include a UK phone number for calls and texts?
No — it's a data-only eSIM. You can still call and message over the internet using apps like WhatsApp, FaceTime, Signal or your usual calling apps.
Can I use the Flylo eSIM alongside my normal SIM?
Yes. Most modern phones run two lines at once, so you can keep your home number active for calls and texts while using the Flylo eSIM for data. Just set Flylo as your data line.
Do I need to switch Data Roaming on?
Yes. Because the eSIM connects by roaming onto UK networks, Data Roaming must be turned ON for the Flylo line — this won't affect your home SIM. Without it, the eSIM won't pick up data.
Can I share the connection or use a personal hotspot?
Yes, tethering is supported. You can share your data with a laptop, tablet or a travel companion's phone using your device's personal hotspot.
How good is coverage away from the cities?
Cities, large towns, motorways and mainline railways are well served with 4G, and 5G is widespread in urban areas. Coverage thins out in remote spots such as the Scottish Highlands and islands, mid-Wales, the Lake District and open moorland, where any network can be patchy.
It's unlimited — is there a catch?
You can use data without a fixed cap, but like most unlimited plans there's a fair-use policy, so speeds may be reduced after a period of very heavy use. For normal travel — maps, browsing, messaging and streaming — it's designed to keep you connected throughout your trip.
When and how does the eSIM activate?
Install it before you travel and it activates automatically when you land and connect to a UK network, usually within a minute or two. Just make sure it's set as your data line with Data Roaming switched on.
Are eSIMs available in United Kingdom?
Yes. Flylo eSIMs work across United Kingdom on the strongest local 4G/5G carriers, with automatic network fallover so you stay online in cities, airports, on trains, and in rural stretches.
What is the best eSIM for travelling in United Kingdom?
Flylo is one of the cheapest unlimited-data eSIMs for United Kingdom — typically well below Holafly's and Airalo's per-day prices on the routes we track, and you can check our live comparison on the page. Install in 60 seconds, no SIM swap, no roaming bill.
How much does an eSIM for United Kingdom cost?
Flylo United Kingdom eSIMs start at $1.97/day for unlimited data. Durations run from short-stay plans up to a month — pick the length that matches your trip. No overages, no per-MB billing, and the price you see is the price you pay at checkout.
How do I buy an eSIM for United Kingdom?
Pick a plan above (1 to 30 days, all unlimited), pay with card, Apple Pay, Google Pay or PayPal, and the eSIM arrives by email in under a minute. No account hoops, no app forced on you.
How do I activate an eSIM in United Kingdom instantly?
Install the eSIM before you fly — it takes 60 seconds on a modern iPhone or Android. The eSIM activates the moment your phone connects to a tower in United Kingdom, typically as you taxi off the runway.
Does Flylo eSIM in United Kingdom support 5G?
Yes — Flylo plans run at full 5G speeds in any region of United Kingdom where the local carrier supports it, and 4G LTE everywhere else. Unlimited plans include a generous daily full-speed allowance; beyond it, speeds may be reduced until the allowance refreshes — your data never cuts off.