May is by far the best month, wherein you can get cheapest flights for Washington to London. Meanwhile, May is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
May- During this month the footfall is less so, the flight is gradually inexpensive.
May - is the cheapest month to book round trip flights.
Disclaimer - All the above-mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.

Washington
22:35
Washington
Washington Dulles International Airport
Tue , 09 Jun 2026

London
17:45
London
London Heathrow Airport
Wed, 10 Jun 2026

Washington
22:35
Washington
Washington Dulles International Airport
Tue , 02 Jun 2026

London
22:00
London
London Heathrow Airport
Wed, 03 Jun 2026

Washington
17:05
Washington
Washington Dulles International Airport
Fri , 05 Jun 2026

London
10:20
London
London Heathrow Airport
Sat, 06 Jun 2026

Washington
20:30
Washington
Washington Dulles International Airport
Wed , 03 Jun 2026

London
20:20
London
London Heathrow Airport
Thu, 04 Jun 2026

Washington
20:30
Washington
Washington Dulles International Airport
Tue , 02 Jun 2026

London
11:55
London
London Heathrow Airport
Wed, 03 Jun 2026

Washington
20:30
Washington
Washington Dulles International Airport
Mon , 01 Jun 2026

London
11:55
London
London Heathrow Airport
Tue, 02 Jun 2026

Washington
21:00
Washington
Washington Dulles International Airport
Sat , 27 Jun 2026

London
16:50
London
London Heathrow Airport
Sun, 28 Jun 2026

Washington
21:00
Washington
Washington Dulles International Airport
Tue , 23 Jun 2026

London
16:50
London
London Heathrow Airport
Wed, 24 Jun 2026

Washington
21:00
Washington
Washington Dulles International Airport
Sun , 28 Jun 2026

London
16:50
London
London Heathrow Airport
Mon, 29 Jun 2026

Washington
22:15
Washington
Washington Dulles International Airport
Wed , 03 Jun 2026

London
10:40
London
London Heathrow Airport
Thu, 04 Jun 2026

Washington
08:05
Washington
Washington Dulles International Airport
Wed , 03 Jun 2026

London
06:25
London
London Heathrow Airport
Thu, 04 Jun 2026










Flying from Washington to London has never been easier. Whether you’re planning a short business trip, a weekend getaway, or reconnecting with family and friends, Easemytrip brings you the best deals, seamless booking, and flexible options for this popular flight route. Our platform is built to help travellers like you compare flight prices, explore direct and connecting options, and find the perfect departure time — all within a few clicks.
The air route between Washington to London is one of the most frequently travelled, offering reliable services from top airlines and excellent connectivity between Washington Dulles International Airport (IAD) and London Heathrow Airport (LHR). You can expect a flight distance of approximately 5901 km, and most direct services cover it in around 18:58.
Let’s take a closer look at everything you need to know before booking your flight from Washington to London.
| Flight Details | Information |
|---|---|
| Route Distance | 5901 km |
| Average Flight Time | 18:58 hrs |
| Departure Airport | Washington Dulles International Airport (IAD) |
| Arrival Airport | London Heathrow Airport (LHR) |
| Cabin Classes Available | Economy Class, Premium Economy, Business Class, First Class |
| Direct Flights | YES |
| Common Airlines | TAP Air Portugal, Icelandair, Royal Air Maroc, United Airlines |
The route is serviced regularly by both full-service and budget airlines, catering to all types of travellers — from those looking for no-frills budget options to those preferring business and first-class comfort. If you're flying for business, early morning weekday flights are a great choice, while leisure travellers often opt for weekend and evening departures.