Heathrow SIM Card: Where to Buy One, Terminal by Terminal
You land at Heathrow, your bags are on the belt, and you still have to find your way into London. A Heathrow airport SIM card is sold inside the airport, so you can be connected before you leave the building. The catch is where, and when. Heathrow runs four terminals, 2, 3, 4, and 5, and the SIM shops keep shop hours, not airport hours. If your flight lands late at night, the counter you were counting on may be shut.
Here is the short version. You can buy a physical SIM at Heathrow from SIM Local stores in the arrivals areas. If your US phone has no SIM tray or is locked, or you land after the shops close, a travel eSIM set up at home is the simpler path, and our 5 GB UK plan is $9.50. If your US plan already covers the UK, you may not need either one. Check that first.
In short:
- Heathrow operates four terminals, 2, 3, 4, and 5. There is no Terminal 1; it closed years ago.
- SIM Local lists 11 stores across those four terminals, mostly open 06:00 to 22:00, so a late landing can miss them all.
- Heathrow's pages name no networks and list no prices at the counter, so ask before you pay.
- Our UK eSIM runs on EE and 3 and starts at $3.50 for 1 GB over 7 days, on 2026-11-02.
United Kingdom eSIM from $3.50Install at home, connect when you land.See plans
Where to buy a SIM at Heathrow, by terminal
Heathrow's own shop directory lists SIM Local as the SIM seller, with "11 Store across 4 Terminals" under tabs for Terminal 2, Terminal 3, Terminal 4, and Terminal 5. The stores sit where you arrive: in Arrivals halls, in Baggage Reclaim, and, in Terminal 5, by the B Gates. One or two are on the Departures side, which will not help you on the way in.
That terminal list is also the simplest proof that Heathrow has no Terminal 1. The Elizabeth line page backs it up: the railway lists stations only for Terminals 2 and 3, Terminal 4, and Terminal 5. So whatever an old sign or blog says about a "Terminal 1," there is nothing there to buy.
Opening hours and the late-landing trap
On 2026-11-02 the heathrow.com store page showed most SIM Local stores open 06:00 to 22:00. Two opened earlier, at 05:30, and one of those closed at 21:00. None was listed as open around the clock.
| Store area (as listed) | Opening hours |
|---|---|
| Arrivals, most stores | 06:00 to 22:00 |
| Two early stores | from 05:30 |
| One early store | 05:30 to 21:00 |
| Baggage Reclaim, Departures, T5 B Gates | not all listed |
So if you land near midnight, plan to arrive with data already working. Our guide to the SIM card at the airport covers how to set that up before you fly.
What a UK operator SIM gives a tourist
The names you will meet are EE, Vodafone, O2, Three, and the smaller brand giffgaff. Heathrow does not say which of them SIM Local stocks. Its service page only says "Various UK operators" sell cards for calls and texts, and it pushes a "free eSIM from Sim Local" that it says connects to "the UK's top networks." The SIM Local shop page names no network and no price either. It claims "significant savings on data, calls and texts versus roaming," with no figure. So treat the counter as a blank page until you ask.
We checked the operators' own sites on 2026-11-02. Here is what held up and what did not.
- O2. Pay as you go includes free use of up to 25 GB inside O2's Europe Zone at no extra cost, and its £30 rolling plan adds up to 500 international minutes to more than 42 countries. Its live Big Bundle data prices loaded by script and came back blank, so we quote none.
- EE. Pay as you go charges 40p a minute for calls and 20p a text, with data bought as an add-on. EU roaming of your allowance costs £2.50 for 24 hours or £10 for 7 days, Ireland counts as the UK, and Turkey is not included. Its pack prices also loaded by script and were not on the page.
- Three, Vodafone, giffgaff. Three and Vodafone prepaid prices are in our UK SIM card guide, so we will not repeat them here. The giffgaff price list would not load for us.
The honest takeaway: no official page publishes what a SIM costs at the Heathrow counter. Reseller blogs print price ranges, but we will not pass on numbers we cannot trace to a source. Ask the staff for the network, the data, the days, and the total before you pay.
Will a UK SIM even fit your phone?
Two checks decide this before you spend a penny.
- A tray. Apple sells iPhone 14 and later in the US with no SIM tray, so a plastic card cannot go in. Those phones take an eSIM only. See does my phone support eSIM.
- A lock. A phone tied to your US carrier may reject a UK SIM. Check your phone and ask your carrier before you leave home.
If your phone is eSIM only, the airport SIM counter cannot help you, and an eSIM is your route.
Buy at the airport, or set up an eSIM first?
A physical SIM at Heathrow suits you if your phone has a tray and is unlocked, you want a UK number, or you plan to use a lot of data and do not mind queuing after a long flight. You hand over a card, the staff can test the SIM, and you walk out connected.
An eSIM set up at home suits you if your phone is eSIM only, you land late, or you just want the first hour sorted before you fly. You install it over Wi-Fi with a QR code, and the days start on your first connection in the UK, not when you install it. Your US line stays on as a second line for bank texts, and you can add data to the same eSIM later. There is no UK phone number with it, since it is data only.
Why you want data the minute you land
Heathrow is far from central London, and the cheap ways in all lean on your phone.
- Elizabeth line. It has a station at every Heathrow rail stop: Terminals 2 and 3, Terminal 4, and Terminal 5. Six trains an hour serve Terminals 2 and 3. A journey to or from Heathrow starts from £13.90, and you tap in with contactless or an Oyster card, or buy a single or Zones 1 to 6 ticket from the station machines. To tap with your phone, or to check your platform, you want data or at least a charged contactless card.
- The Underground. The Piccadilly line runs from Heathrow into town for less money and more time. Same tap-in, same need to check the line status on your phone.
- Maps and your hotel. Save an offline map of your area and screenshot your hotel address while you are still on airport Wi-Fi, in case your data is not live yet.
Heathrow has free Wi-Fi in the terminals, so use it to message your hotel, load your route, and set up a plan before you step onto a train. Skip banking apps on open airport Wi-Fi.
For sizing, 1 GB is about 5 hours of maps and taxi apps, or about 1.5 hours of video calls. A few days in London with daily maps and a short video call sits inside 3 GB. Our guide on how much data you need has more.
Our UK eSIM
Prices on 2026-11-02, on the UK plans page:
| Data | Valid for | Price |
|---|---|---|
| 1 GB | 7 days | $3.50 |
| 3 GB | 30 days | $7 |
| 5 GB | 30 days | $9.50 |
| 10 GB | 30 days | $15.50 |
| 20 GB | 30 days | $28 |
The plan runs on EE and 3, per our catalog. We have not measured speeds ourselves, so ask staff to test any physical SIM, and compare against your own US plan. If your carrier already includes UK data at a fair daily rate, keep it and skip the extra purchase. For bank codes sent to your old number, see keeping your US number abroad.
Questions
Can I buy a SIM card at Heathrow Airport?
Yes. Heathrow lists 11 SIM Local stores across Terminals 2, 3, 4, and 5, mostly in the arrivals areas. Listed hours are mostly 06:00 to 22:00, and the airport pages give no prices, so ask at the counter.
Where is the SIM card shop at Heathrow?
SIM Local stores sit in Arrivals and Baggage Reclaim in Terminals 2, 3, and 4, and by the B Gates in Terminal 5. There is no Terminal 1 at Heathrow.
Is it cheaper to buy a SIM at Heathrow or an eSIM before I fly?
No official page lists the Heathrow counter price, so we cannot compare on cost alone. An eSIM set up at home is simpler if your phone is eSIM only or you land late. Our 5 GB UK eSIM was $9.50 on 2026-11-02.
Does Heathrow have free Wi-Fi?
Yes, Heathrow offers free Wi-Fi in its terminals. Use it to load your route and message your hotel before you leave the building.
Sources
- Heathrow, UK sims and phones, checked 2026-11-02
- Heathrow, Sim Local store, checked 2026-11-02
- Heathrow, Elizabeth line, checked 2026-11-02
- O2, Pay As You Go, checked 2026-11-02
- EE, pay as you go SIM, checked 2026-11-02