Cheap flights from London Heathrow Airport to Washington, D.C. from £308
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 14/8. 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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Scandinavian Airlines flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Our best Scandinavian Airlines deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets
KLM flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Our best KLM deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport 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. Dulles Intl 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 cheapest month to fly to Washington, D.C. Dulles Intl Airport?
The month of February is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London Heathrow Airport, with most prices found around £509. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport during March instead. Flights to Washington, D.C. Dulles Intl Airport in March, while not as cheap as those in February, still average around £523.
What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?
According to our data, Wednesday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was £617. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. 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 £692.
What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?
The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is in the evening when flights can be purchased for as low as £521. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £650.
What is the cheapest London Heathrow to Washington, D.C. Dulles Intl flight route?
Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London Heathrow - Washington, D.C. Dulles Intl flight prices
How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?
You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around £612 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport for as low as £564 on momondo.
What cabin class options are available on London Heathrow to Washington, D.C. Dulles Intl flights?
There are 4 cabin classes available to choose from on London Heathrow to Washington, D.C. Dulles Intl 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. Dulles Intl?
TAP AIR PORTUGAL, Scandinavian Airlines, and Aer Lingus are the most popular carriers operating from London Heathrow to Washington, D.C. Dulles Intl
Which airlines fly to Washington, D.C. Dulles Intl Airport?
British Airways, Virgin Atlantic and Lufthansa are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 16 different airlines that fly to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport on average per day?
24 flights are operational daily from London Heathrow Airport to Washington, D.C. Dulles Intl Airport as of June 2025. The most popular departure time for this route is 12:00, with 100% of flights per day taking off in the afternoon.
How many flights depart from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on average per week?
As of June 2025, 172 flights take off from London Heathrow Airport and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.
When to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Cheap London Heathrow Airport to Washington, D.C. Dulles Intl Airport (LHR to IAD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
How far is London Heathrow to Washington, D.C. Dulles Intl by plane?
London Heathrow and Washington, D.C. Dulles Intl are 3664.4 mi apart from one another. A reasonable flight in good conditions will take 8h 05m.
When did momondo last update prices for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Prices for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
The number of operators available for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 16 as of June 2025.
How old do you have to be to fly from London Heathrow Airport to Washington, D.C. Dulles Intl 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl 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 Washington, D.C. Dulles Intl 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is Boeing 777, representing 27.73% of all bookings. The subsequent popular models are Airbus A380-800 at 15.88%, Boeing 777-300ER at 10.29%, and Airbus A330-900neo at 10.01%.
What is the most popular airline from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is British Airways (27% of total bookings). The next most popular airlines are Virgin Atlantic (22%), Lufthansa (10%), and Aer Lingus (8%).
Best airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £186 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom £274 | Free Cancellation | Rating 7.0 102 reviews | |||
| PriceFrom £377 | Free Cancellation | Rating 7.4 355 reviews | |||
| PriceFrom £377 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom £386 | Free Cancellation | Rating 7.1 1,887 reviews | |||
| PriceFrom £433 | Free Cancellation | Rating 7.3 1,387 reviews | |||
| PriceFrom £435 | Free Cancellation | Rating 7.5 1,463 reviews | |||
| PriceFrom £437 | Free Cancellation | Rating 7.6 1,290 reviews | |||
| PriceFrom £448 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom £458 | Free Cancellation | Rating 6.6 7,011 reviews |
Delta Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Delta flies from London Heathrow Airport to Washington, D.C. Dulles Intl Airport around 7 times per week, with 7,946 momondo users rating the airline 8.0/10. The cheapest Delta deal from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in the last 72 hours was £253 (round-trip), much lower than the average airfare cost of £743 for Delta flights on this route.
KLM Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport
The best KLM deal for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets found on momondo in the last 72 hours was £644, round-trip. It should be noted that an average KLM flight deal for this route in this time was higher, at £851 round-trip. KLM operates 7 flights out of London Heathrow Airport into Washington, D.C. Dulles Intl Airport in an average week, so prices vary by time and availability. 1,358 KLM reviews by users on momondo have scored the airline at 7.8/10.
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Why should I use momondo to find a flight deal from London to Washington, D.C.?
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 London to Washington, D.C. for you.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
momondo does allow users to show only those flights to Washington, D.C. from London which offer a flexible booking policy as well as other useful filters and features.
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..
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Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.