CityRailTransit
Timeline of the London Heathrow Express

Commuter Railway

23-06-1998: Heathrow Express > (Paddington) - Hayes & Harlington - Heathrow Terminal 4 (+7.2 km)
27-06-2008: Heathrow Express > Heathrow Terminals 1, 2, 3 - Heathrow Terminal 5 (+2.1 km)