London Heathrow Airport (LHR) serves London. Here is how to get online from the moment you land: the free Wi-Fi, where SIM cards are sold, and the eSIM you can install before you fly.
The free network is Heathrow Wi-Fi, in every terminal.
Sim Local runs 11 stores across Terminals 2, 3, 4 and 5, in the arrivals, baggage reclaim and departures areas. Most open 06:00 to 22:00 every day; some Terminal 5 stores open at 05:30 or close at 21:00. They sell SIM cards from several UK networks, plus handsets and accessories.
A guide updated in August 2026 puts 30-day plans at roughly 10 to 55 pounds depending on the network: about 10 to 30 pounds for O2, 10 to 40 for Vodafone, 20 to 45 for Three and 30 to 55 for EE (checked October 2026).
Install one at home before you fly and you are online when the wheels touch down, with no queue at a SIM counter.
The UK's main mobile networks are EE, O2, Vodafone and Three. Vodafone and Three merged into VodafoneThree in 2025 and still run under their own brands while their networks are combined. A travel eSIM connects to one of them as a roaming partner, which is why data roaming must be on for the eSIM line. The partner network can differ from plan to plan, so check the plan details, or ask us at support@esimlounge.com before you buy.
One eSIM that also works in the other countries of the bundle, for a trip that crosses borders.
One eSIM that also works in the other countries of the bundle, for a trip that crosses borders.
See every country in Global (170 countries)
One eSIM that also works in the other countries of the bundle, for a trip that crosses borders.
See every country in Global (75 countries)
Compare every United Kingdom eSIM plan Check your phone supports eSIM
The taxis, trains and private transfers from LHR into London are compared on our sister site: London Heathrow Airport on airporttransportation.com
Yes. Select Heathrow Wi-Fi, follow the on-screen steps and register. It is free in every terminal.
At Sim Local, which has 11 stores across Terminals 2, 3, 4 and 5, including arrivals and baggage reclaim. Most open 06:00 to 22:00.
Go to www.heathrow.com in your browser to bring it up. On a work laptop, turn off the proxy setting while you sign in.
