Cheap flights from Washington, D.C. to London Heathrow Airport from £163
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 Heathrow Airport departing on 11/8. 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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TAP AIR PORTUGAL flights from Washington, D.C. to London Heathrow Airport
Our best TAP AIR PORTUGAL deals on Washington, D.C. to London Heathrow Airport flight tickets
Icelandair flights from Washington, D.C. to London Heathrow Airport
Our best Icelandair deals on Washington, D.C. to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Washington, D.C. to London Heathrow Airport
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 Heathrow Airport?
What is the cheapest month to fly to London Heathrow Airport?
In general, October is the cheapest month to fly from Washington, D.C. to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £501. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Washington, D.C. averaging around £512.
What is the cheapest day to depart on your flight to London Heathrow Airport?
On average, the least expensive day to fly to London Heathrow Airport from Washington, D.C. is on a Monday. momondo users have found tickets for Monday departures for as low as £553. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £658.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Washington, D.C. to London Heathrow Airport in the morning for as low as £0. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £634 on average. Flights to London Heathrow Airport from Washington, D.C. in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Washington, D.C. to London Heathrow flight route?
Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - London Heathrow flight prices
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £580 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Washington, D.C. for as low as £545 on momondo.
What cabin class options are available on Washington, D.C. to London Heathrow flights?
There are 4 cabin classes available to choose from on Washington, D.C. to London Heathrow 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 Heathrow?
TAP AIR PORTUGAL, Icelandair, and JetBlue are the most popular carriers operating from Washington, D.C. to London Heathrow
Which airlines fly to London Heathrow Airport?
British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Washington, D.C. according to our data. British Airways is the first choice among our users, with 41% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 8 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Washington, D.C. to London Heathrow Airport on average per day?
30 flights are operational daily from Washington, D.C. to London Heathrow Airport as of April 2025. The most popular departure time for this route is 22:00, with 72% of flights per day taking off in the evening.
How many flights depart from Washington, D.C. to London Heathrow Airport on average per week?
211 flights are operational weekly from Washington, D.C. to London Heathrow Airport as of April 2025. The most popular departure day for this route is Tue, with 15% of flights per week taking off on this day.
When to book flights from Washington, D.C. to London Heathrow Airport
Cheap Washington, D.C. to London Heathrow Airport (WAS to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to London Heathrow Airport
How far is Washington, D.C. to London Heathrow by plane?
There are 3649.4 mi between Washington, D.C. and London Heathrow. By plane, this route typically takes 7h 15m.
When did momondo last update prices for flights from Washington, D.C. to London Heathrow Airport?
Prices for flights from Washington, D.C. to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to London Heathrow Airport?
As of April 2025, there are 8 operators available to choose from for flights from Washington, D.C. to London Heathrow Airport.
How old do you have to be to fly from Washington, D.C. to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport 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 Heathrow Airport. 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 Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to London Heathrow Airport is Boeing 777 (38.23% of total bookings). The next most popular plane models are Airbus A380-800 (16.28%), Boeing 787-8 Dreamliner (7.36%), and Airbus A350-1000 (6.67%).
What is the most popular airline from Washington, D.C. to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to London Heathrow Airport is British Airways, representing 33% of all bookings. The subsequent popular airlines are Virgin Atlantic at 27%, Iberia at 16%, and Icelandair at 13%.
Best airlines flying from Washington, D.C. to London Heathrow Airport
Compare and see reviews for airlines that fly from Washington, D.C. to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £360 | Free Cancellation | Rating 7.0 484 reviews | |||
| PriceFrom £418 | Free Cancellation | Rating 7.0 2,686 reviews | |||
| PriceFrom £429 | Free Cancellation | Rating 7.4 1,444 reviews | |||
| PriceFrom £429 | Free Cancellation | Rating 6.6 6,815 reviews | |||
| PriceFrom £438 | Free Cancellation | Rating 7.4 642 reviews | |||
| PriceFrom £463 | Free Cancellation | Rating 7.8 1,333 reviews | |||
| PriceFrom £496 | Free Cancellation | Rating 6.7 7,030 reviews | |||
| PriceFrom £498 | Free Cancellation | Rating 7.4 8,685 reviews |
KLM Flights From Washington, D.C. to London Heathrow Airport
The lowest priced KLM flight from Washington, D.C. to London Heathrow Airport from the last 72 hours was £616. Generally, KLM has 5 flights on this route every week with an average price of £739. KLM is rated 7.8/10 by our users.
Air France Flights From Washington, D.C. to London Heathrow Airport
Across 1,444 Air France reviews on momondo, the average score is 7.4/10. Air France flies from Washington, D.C. to London Heathrow Airport about 5 times each week, with ticket deals ranging from £570 to £725. Price data is based on momondo searches in the last 72 hours.
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Why should I use momondo to find a flight deal from Washington, D.C. to London?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to London for you.
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?
Once you have performed a search for Washington, D.C. to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
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.