London Heathrow is the largest airport in Europe. To get from from one terminal to another is a shuttle train ride, walking to your departure gate alone can take 20+ minutes. For an early morning flight, or after a long international flight, plan to stay in a hotel at the airport.

Here's Travel for Kids list of best family hotels for London Heathrow Airport, in or around the airport.

Hotels are selected for their amenities for families, such as indoor swimming pools, on-site restaurants with children's menu, early morning breakfast, coin-operated laundry, and more. Hotel policies can change, however, so be sure to check with the hotel at the time you make your reservation to be sure your desired family amenities are still available.

Tip: Also check out London family hotels and London family apartments rentals.

• Hilton Garden Inn Terminal 2 - Located inside Terminal 2, walkway to Terminal 3; family rooms, junior suites with king bed plus sofa bed (sleep 4); rooms with two twin beds (sleep 2), connecting rooms available; on-site restaurant serving breakfast, lunch, dinner, room service; air conditioning; cafes (Caffe Nero), bakeries, sandwiches (Pret a Manger), more restaurants close by.
Terminal 4
• Hilton London Heathrow Airport - Rooms with queen bed or two twin beds (sleep 2), two bedroom connecting rooms (sleep 4); crib or high chair available upon request; babysitting can be arranged; on-site restaurants serving breakfast, lunch and dinner with children's menu and room service; car parking (fee).
• Crowne Plaza London Heathrow - Indoor swimming pool and jacuzzi; rooms with two double beds (sleep 4), rooms with two twin beds, (sleep 2); air-conditioning; mini-fridge in rooms; car parking (fee); on-site restaurant with children's menu; babysitting can be arranged.
• Holiday Inn Express London Heathrow - Rooms with double bed plus sofa bed (sleep 4), rooms with twin beds (sleep 2) connecting rooms available; breakfast is included in room rate; two on-site restaurants serving breakfast, lunch and dinner, kid's menu; air conditioning; car parking (fee).
Terminal 5
• Sofitel London Heathrow - Walkway to Terminal 5 from the hotel; junior suites with king bed plus sofa bed, one bedroom suites with queen bed plus sofa bed (sleep 4), rooms with two twin beds (sleep 2); suites have mini-fridge with complimentary cold drinks; air conditioning; on-site restaurant serving breakfast and dinner, kids meals available, plus more excellent restaurants in Terminal 5; parking available (fee).
Around the Airport
• London Heathrow Marriott Hotel - Indoor swimming pool and jacuzzi; rooms with double or two twin beds (sleep 2), triples (sleep 3); family rooms (sleep 4); mini-fridge in rooms; room service and on-site restaurants with family friendly food; car parking (fee).
• Hilton Garden Inn Heathrow - Rooms with king/queen bed plus sofa bed, or two double beds (sleep 4); mini-fridge in rooms; convenience store; air-conditioning; on site restaurant with children's menu; car parking (fee); coin-operated laundry.
• Novotel Hotel Heathrow - Indoor swimming pool; standard or superior rooms with queen bed plus sofa bed (sleep 4); breakfast is included in the room rate; room service, restaurant with children's menu; play area for kids; car parking; shuttle to airport.
• Sheraton Skyline Heathrow - Indoor swimming pool; rooms with double or two twin beds (sleep 2), triples (sleep 3); family rooms (sleep 4); mini-fridge in rooms; air-conditioning; on-site restaurants serving breakfast, lunch and dinner, with family-friendly food; shuttle to airport.
• Holiday Inn Heathrow - Rooms with double bed plus sofa bed (sleep 4), room with two twin beds (sleep 2), connecting rooms available; breakfast buffet included in room rate; car parking (fee); on-site restaurant serving breakfast, lunch and dinner, kids menu, kids eat free with paying adult; crib available upon request; airport shuttle.
• Hyatt Place London Heathrow - Rooms with two twin beds or king bed (sleep 2), plus extra bed (sleep 3); air conditioning; mini-fridge in rooms; on-site restaurant serving breakfast and dinner, with kid's menu, room service; convenience store with snacks and cold drinks; car parking.