Good to Know: LHR to IAD Flights
Useful information for finding cheap flights from London Heathrow to Washington Dulles International and booking your next trip
Cheapest One way Flight
£1253
Delta Airlines• 1 stop• 19h 8mAug 26
The cheapest one way flight from London Heathrow to Washington Dulles International is currently £1253
Fastest Flight
13h 35m
The fastest nonstop flight from London Heathrow to Washington Dulles International takes 13h 35m
Best Flight Deals from London to Washington
Explore the lowest round-trip fares from London to Washington. We've compared hundreds of airlines and travel sites so you don't have to.
Whether you're moving or just visiting, here are some of the best one-way flight options from LHR to IAD—searched and filtered with flexibility in mind.
Need to fly soon? We've surfaced some of the most affordable last-minute flights from London to Washington, ideal for urgent plans or spontaneous trips.
Looking for the fastest way to Washington? These direct flight options from LHR to IAD offer both convenience and value—no layovers, just straight to your destination.
Flights from London to Washington
| Origin Airport | London Heathrow , London, GB |
| Destination Airport | Washington Dulles International , Washington, US |
| Distance | miles |
More Flight Options for London (LHR) and Washington (IAD)
Why Fareleaders for LHR to IAD Flights
Lowest Prices
Uncover the best deals on LHR to IAD flights by comparing fares from hundreds of airlines and agencies.
New Deals Everyday
Get the best prices on LHR to IAD flights—we update our fares daily so you never miss a saving.
Best Travel Options
Compare hundreds of LHR to IAD flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the London (LHR) to Washington (IAD)
Terms and Conditions*