Cheap flights from Washington, D.C. to London from $189
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Iberia flights from Washington, D.C. to London
Our best Iberia deals on Washington, D.C. to London flight tickets
Finnair flights from Washington, D.C. to London
Our best Finnair deals on Washington, D.C. to London flight tickets
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How to get the cheapest flight ticket from Washington, D.C. to London
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Washington, D.C. and London?
What is the cheapest month to fly to London?
The cheapest month to fly to London from Washington, D.C. is in January. Flight prices, which tend to average around $643, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Washington, D.C. averaging around $654.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from Washington, D.C. to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $793. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $924. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from Washington, D.C. in the morning is the least expensive time of day to depart. momondo users have found prices as low as $692 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $850. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Washington, D.C. to London flight route?
Fly from Baltimore/Washington to London Heathrow for the best Washington, D.C. - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from Washington, D.C. when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to London for around $772 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. for as low as $726 on momondo.
What cabin class options are available on Washington, D.C. to London flights?
There are 4 cabin classes available to choose from on Washington, D.C. to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Washington, D.C. to London?
Icelandair, TAP AIR PORTUGAL, and PLAY are the most popular carriers operating from Washington, D.C. to London
What airlines fly to London?
British Airways, Iberia and United Airlines are the top three most popular airlines that fly to London from Washington, D.C. according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when traveling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from Washington, D.C. to London on average per day?
26 flights are operational daily from Washington, D.C. to London as of May 2025. The most popular departure time for this route is 10:00PM, with 70% of flights per day taking off in the evening.
How many flights depart from Washington, D.C. to London on average per week?
As of May 2025, there are 186 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Wed, with 17% of flights taking off on this day.
When to book flights from Washington, D.C. to London
Cheap Washington, D.C. to London (WAS to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to London
How far is Washington, D.C. to London by plane?
Washington, D.C. and London are 3662.3 mi apart from one another. A reasonable flight in good conditions will take 7h 15m.
When did momondo last update prices for flights from Washington, D.C. to London?
Prices for flights from Washington, D.C. to London were last updated today.
How many operators does momondo search for flights from Washington, D.C. to London?
As of May 2025, there are 17 operators available to choose from for flights from Washington, D.C. to London.
How old do you have to be to fly from Washington, D.C. to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to London?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to London is Boeing 777 (37.86% of total bookings). The next most popular plane models are Airbus A380-800 (18.07%), Boeing 787-8 Dreamliner (8.20%), and Airbus A330-900neo (7.03%).
What is the most popular airline from Washington, D.C. to London?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to London is British Airways, representing 21% of all bookings. The subsequent popular airlines are United Airlines at 15%, Iberia at 13%, and PLAY at 12%.
Best airlines flying from Washington, D.C. to London
Compare and see reviews for airlines that fly from Washington, D.C. to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $369 | Free Cancellation | Rating 6.9 101 reviews | |||
| PriceFrom $370 | Free Cancellation | Rating 7.3 1,351 reviews | |||
| PriceFrom $421 | Free Cancellation | Rating 8.0 7,944 reviews | |||
| PriceFrom $474 | Free Cancellation | Rating 7.0 489 reviews | |||
| PriceFrom $486 | Free Cancellation | Rating 7.1 1,862 reviews | |||
| PriceFrom $545 | Free Cancellation | Rating 7.0 1,082 reviews | |||
| PriceFrom $549 | Free Cancellation | Rating 7.0 9,282 reviews | |||
| PriceFrom $562 | Free Cancellation | Rating 7.0 2,710 reviews | |||
| PriceFrom $570 | Free Cancellation | Rating 6.7 7,061 reviews | |||
| PriceFrom $572 | Free Cancellation | Rating 7.5 1,590 reviews |
Delta Flights From Washington, D.C. to London
The lowest priced Delta flight from Washington, D.C. to London from the last 72 hours was $421. Generally, Delta has 5 flights on this route every week with an average price of $849. Delta is rated 8.0/10 by our users.
Finnair Flights From Washington, D.C. to London
Finnair (7.6/10 from 1,276 reviews) operates around 13 flights from Washington, D.C. to London in any given week. The average Finnair airfare for this route is around $759, with deals from around $573 rare but found on momondo. Referenced prices are for round-trip Washington, D.C. to London flight searches in the last 72 hours.
Traveling to a place near London?
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Why should I use momondo to find a flight deal from Washington, D.C. to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Washington, D.C..
Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?
momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Washington, D.C. to London?
momondo helps you find the best flight between Washington, D.C. and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.