Given Heathrow’s fantastic public transportation options, airport shuttle buses aren’t particularly popular. However, there are bus services linking the airport with the national rail network. They stop at stations in Watford, Woking, Reading and Feltham. Passengers can purchase a combined bus and rail ticket to cover the entire journey.
As mentioned in the hotels section, there is also a convenient hotel shuttle service. The Heathrow Hotel Hoppa operates from 04:00 to midnight, stops right in front of each of the terminals and connects to a variety of hotels in the surrounding area.