Bus from Watford to Heathrow Airport T2 & T3 (also T4 & T5 via Shuttle)

Use Heathrow Airport's terminal guide to check which terminal you need.
You should plan to be at check-in:
• Long-haul and El Al: three hours
• UK and European flights: two hours
before scheduled departure.

Terminals 2 & 3
You can walk between Terminals 2 & 3 via the pedestrian underpass. The route is well signposted and can be followed on the interactive Heathrow map. If you have walking difficulties, find out about special assistance.

Terminals 4 & 5
Free shuttle trains run between Heathrow Central station (Terminals 2 & 3) and Terminal 4 or 5. There are four trains an hour. To travel on the shuttle trains, you can get a free Inter-Terminal Transfer ticket from the machines in the station.