The average train between London St. Pancras Int. and London Heathrow Airport (LHR) takes 33 min and the fastest train takes 28 min. The train runs at least 3 times per hour from London St. Pancras Int. to London Heathrow Airport (LHR). The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 20 minutes between London St. Pancras Int. and London Heathrow Airport (LHR). The earliest departure is at 5:33 AM in the morning, and the last departure from London St. Pancras Int. is at 5:37 PM which arrives into London Heathrow Airport (LHR) at 6:10 PM. All services require a transfer at Paddington and take an average of 33 min. The schedules shown below are for the next available departures.

37 min • 1 change

36 min • 1 change

31 min • 1 change

29 min • 1 change
Want to know about travelling from London St. Pancras Int. to London Heathrow Airport (LHR)? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from London St. Pancras Int. to London Heathrow Airport (LHR). However, there are services departing from London St. Pancras Int. station and arriving at London Heathrow Airport (LHR) station via Paddington. The journey, including transfers, takes approximately 33 min.
London St. Pancras Int. to London Heathrow Airport (LHR) train services, operated by London Underground (Tube), depart from King's Cross St. Pancras station.
London St. Pancras Int. to London Heathrow Airport (LHR) train services, operated by London Underground (Tube), arrive at Heathrow Terminals 2 & 3 station.
Book your London St. Pancras Int. to London Heathrow Airport (LHR) train tickets online with London Underground (Tube), Heathrow Express and Elizabeth Line (TfL).
The distance between London St. Pancras Int. and London Heathrow Airport (LHR) is 23.7 km. The road distance is 27 km.
London Underground (Tube) operates a subway from King's Cross St. Pancras station to Heathrow Terminals 1-2-3 station every 10 minutes. Tickets cost £14–55 and the journey takes 57 min.