Hilton London Heathrow Airport hotel connects directly to London Heathrow Airport via Terminal 4. Complimentary shuttle bus service is available from and to Terminal 5. Within eight kilometers of the hotel, the 45,000 square meter Windsor Castle is an official residence of British royalty. Thorpe Park, London’s popular amusement park, also stands eight kilometers away. Hotel Features. Among the hotel’s numerous services, the hotel offers a beauty salon, newsstand and car rental desk. Aiming to rejuvenate, the hotel also features an indoor pool, sauna and fitness room stocked with an array cardio and weight training equipment.