Best time to book Washington to London
Fares vary significantly by season. Booking at the right time can save you considerably.
Searching for cheap flights from Washington to London? Compare departures from Dulles International (IAD) to Heathrow (LHR). Find the best time to book, top airlines, flight duration, and money-saving tips for your US East Coast to UK trip.
Compare departure and arrival airports for the Washington to London route.
Dulles International (IAD)
Silver Line Metro to downtown Washington in 60 minutes.
Heathrow (LHR)
Heathrow Express to Paddington in 15 minutes.
British Airways, United, and American Airlines operate nonstop transatlantic flights between Washington Dulles and London Heathrow.
Fares vary significantly by season. Booking at the right time can save you considerably.
Nonstop flights from Washington to London take approximately ~7h 20m. The distance is 3673 miles. Around 8+ flights operate daily on this route.
United has a hub at Dulles — often competitive fares.
Book 6–10 weeks ahead for best transatlantic fares.
January and February offer the lowest fares.
Discover what awaits after your flight from Washington.
~7h 20m nonstop. Distance ~3673 miles.
British Airways, United, American Airlines nonstop.
January, February, November.
No visa up to 6 months. eTA required from 2025.
6–10 weeks in advance.