Hotel Transportation: The blue buses of Hotel Hoppa links Heathrow's 4 terminals with 15 of the Airport's major hotels. The services are not direct from Terminal 4 there is a free shuttle bus to Terminal 3 where passengers can connect with the other six Heathrow Hotel Hoppa Services. There are no individual hotel shuttle buses, just the "Hotel Hoppa." The service costs £5. each, round trip ($8.45US). It has many routes, and you have to make sure you are on the correct bus.