The Heathrow Hoppa bus is the main way to travel between the nearby airport hotels and the terminals, since hotels at Heathrow airport aren't allowed to operate their own shuttle service, to help ease congestion. The Heathrow Hoppa operates 900 services a day, offering direct transfers from 27 London Heathrow hotels to all 5 terminals, around the clock. Prices are £4.50 for a single, or £8 for a return. View the full range of bus services on the official website.