Getting your tickets
Self-service ticket machines have been installed at Heathrow airport terminals. You can now buy your train ticket in advance on trainline.com for collection upon arriving at Heathrow airport. Ticket machine location..
Heathrow Terminal 2 and 3 - Opposite the Heathrow Express Ticket desk in the Central Terminal area - this is after you enter the station and before the lifts to platform level.
Heathrow Terminal 4 - on the Arrivals level opposite the Heathrow Express Ticket desk.
Heathrow Terminal 5 - to the left of the ticket desk on Arrivals level. Another at platform level which is opposite from the lift exit.