Heathrow Express
Terminal 4 is served by Heathrow Terminal 4 Underground station on the London Underground's Piccadilly line and by Heathrow Express trains at Heathrow Terminal 4. Heathrow Express provides a free shuttle service to Heathrow Central station. At Heathrow Central, passengers can change for free services to Terminal 5, and also for the main Heathrow Express service to Paddington or the TfL Rail (formally Heathrow Connect) stopping service. As of February 2019, a standard adult single ticket to Paddington on Heathrow Express is £25.00 (£22.00 off-peak) if purchased before travel, or £27.00 if purchased on the train.