Cheap flights from London Heathrow Airport to Washington, D.C. from £250
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Washington, D.C. departing on 27/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Washington, D.C.
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
British Airways flights from London Heathrow Airport to Washington, D.C.
Our best British Airways deals on London Heathrow Airport to Washington, D.C. flight tickets
United Airlines flights from London Heathrow Airport to Washington, D.C.
Our best United Airlines deals on London Heathrow Airport to Washington, D.C. flight tickets
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from London Heathrow Airport to Washington, D.C.
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 cheapest month to fly to Washington, D.C.?
The cheapest month to fly to Washington, D.C. from London Heathrow Airport is in February. Flight prices, which tend to average around £521, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £534.
What is the cheapest day to depart on your flight to Washington, D.C.?
On average, the least expensive day to fly to Washington, D.C. from London Heathrow Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £622. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £720.
What is the cheapest time of day to depart on your flight to Washington, D.C.?
In the evening is the cheapest time of day to fly from London Heathrow Airport to Washington, D.C. when you can find flight prices for as low as £512. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the afternoon, with an average ticket price of £657. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest London Heathrow to Washington, D.C. flight route?
Fly from London Heathrow to Baltimore/Washington for the best London Heathrow - Washington, D.C. flight prices
How far in advance should I book a flight to Washington, D.C.?
You are more likely to see cheaper flights to Washington, D.C. from London Heathrow Airport when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around £617 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London Heathrow Airport for as low as £553 on momondo.
What cabin class options are available on London Heathrow to Washington, D.C. flights?
There are 4 cabin classes available to choose from on London Heathrow to Washington, D.C. 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 London Heathrow to Washington, D.C.?
TAP AIR PORTUGAL and WestJet are the most popular carriers operating from London Heathrow to Washington, D.C.
Which airlines fly to Washington, D.C.?
British Airways, Virgin Atlantic and Icelandair are the top three most popular airlines that fly to Washington, D.C. from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when travelling to Washington, D.C.. Keep in mind that there are 19 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Washington, D.C. on average per day?
As of April 2025, there are 24 flights per day flying from London Heathrow Airport to Washington, D.C.. The most common time of day flights depart is 12:00, with 100% of flights taking off in the afternoon.
How many flights depart from London Heathrow Airport to Washington, D.C. on average per week?
170 flights are operational weekly from London Heathrow Airport to Washington, D.C. as of April 2025. The most popular departure day for this route is Wed, with 19% of flights per week taking off on this day.
When to book flights from London Heathrow Airport to Washington, D.C.
Cheap London Heathrow Airport to Washington, D.C. (LHR to WAS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Washington, D.C.
Best price found | £250 |
|---|---|
Fastest flight time | 8h 00m |
Direct flights | Every day |
Airports in Washington, D.C. | 3 airports |
How far is London Heathrow to Washington, D.C. by plane?
The straight-line distance from London Heathrow to Washington, D.C. is 3649.4 mi. Flights usually cover this in 8h 00m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Washington, D.C.?
Prices for flights from London Heathrow Airport to Washington, D.C. are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C.?
As of April 2025, there are 19 operators available to choose from for flights from London Heathrow Airport to Washington, D.C..
How old do you have to be to fly from London Heathrow Airport to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London Heathrow Airport to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Washington, D.C. is Boeing 777, representing 30.79% of all bookings. The subsequent popular models are Airbus A380-800 at 14.10%, Boeing 777-300ER at 11.04%, and Airbus A330-900neo at 8.97%.
What is the most popular airline from London Heathrow Airport to Washington, D.C.?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Washington, D.C. is British Airways, representing 29% of all bookings. The subsequent popular airlines are Virgin Atlantic at 17%, Icelandair at 9%, and Lufthansa at 7%.
Best airlines flying from London Heathrow Airport to Washington, D.C.
Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £276 | Free Cancellation | Rating 6.9 101 reviews | |||
| PriceFrom £319 | Free Cancellation | Rating 8.0 7,936 reviews | |||
| PriceFrom £364 | Free Cancellation | Rating 7.0 487 reviews | |||
| PriceFrom £382 | Free Cancellation | Rating 7.3 346 reviews | |||
| PriceFrom £382 | Free Cancellation | Rating 7.3 2,924 reviews | |||
| PriceFrom £391 | Free Cancellation | Rating 7.1 1,852 reviews | |||
| PriceFrom £439 | Free Cancellation | Rating 7.3 1,349 reviews | |||
| PriceFrom £440 | Free Cancellation | Rating 7.4 1,446 reviews | |||
| PriceFrom £449 | Free Cancellation | Rating 7.6 1,275 reviews | |||
| PriceFrom £460 | Free Cancellation | Rating 7.8 1,334 reviews |
Delta Flights From London Heathrow Airport to Washington, D.C.
Delta flies from London Heathrow Airport to Washington, D.C. around 7 times per week, with 7,936 momondo users rating the airline 8.0/10. The cheapest Delta deal from London Heathrow Airport to Washington, D.C. in the last 72 hours was £428 (round-trip), much lower than the average airfare cost of £1,022 for Delta flights on this route.
KLM Flights From London Heathrow Airport to Washington, D.C.
The best KLM deal for London Heathrow Airport to Washington, D.C. flight tickets found on momondo in the last 72 hours was £617, round-trip. It should be noted that an average KLM flight deal for this route in this time was higher, at £893 round-trip. KLM operates 7 flights out of London Heathrow Airport into Washington, D.C. in an average week, so prices vary by time and availability. 1,334 KLM reviews by users on momondo have scored the airline at 7.8/10.
Travelling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from London to Washington, D.C.?
Finding the right flight to Washington, D.C. from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
Flights from London to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from London to Washington, D.C.?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Washington, D.C..
I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of London to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.