Cheap flights from London to Washington, D.C. from £223
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 to Washington, D.C. departing on 31/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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 to Washington, D.C.
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Scandinavian Airlines flights from London to Washington, D.C. Dulles Intl Airport
Our best Scandinavian Airlines deals on London to Washington, D.C. Dulles Intl Airport flight tickets
KLM flights from London to Washington, D.C. Dulles Intl Airport
Our best KLM deals on London 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 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 March is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London, with most prices found around £499. If you aren’t able to travel during the month of March, then book flights to Washington, D.C. Dulles Intl Airport from London during February instead. Flights to Washington, D.C. Dulles Intl Airport in February, while not as cheap as those in March, still average around £510.
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. 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 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 to Washington, D.C. Dulles Intl flight route?
Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London - 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 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 for as low as £564 on momondo.
What cabin class options are available on London to Washington, D.C. Dulles Intl flights?
There are 4 cabin classes available to choose from on London 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 to Washington, D.C. Dulles Intl?
TAP AIR PORTUGAL, Scandinavian Airlines, and Aer Lingus are the most popular carriers operating from London 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 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 to Washington, D.C. Dulles Intl Airport on average per day?
24 flights are operational daily from London 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 to Washington, D.C. Dulles Intl Airport on average per week?
The number of flights available between London and Washington, D.C. Dulles Intl Airport is 172 per week as of June 2025. The most frequent departure day is Wed, with 16% of weekly flights leaving on this day.
When to book flights from London to Washington, D.C. Dulles Intl Airport
Cheap London to Washington, D.C. Dulles Intl Airport (LON to IAD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Washington, D.C. Dulles Intl Airport
How far is London to Washington, D.C. Dulles Intl by plane?
There are 3677.3 mi between London and Washington, D.C. Dulles Intl. Typically, this will take 8h 05m by plane in normal conditions.
When did momondo last update prices for flights from London to Washington, D.C. Dulles Intl Airport?
Prices for flights from London to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London to Washington, D.C. Dulles Intl Airport?
As of June 2025, there are 16 operators available to choose from for flights from London to Washington, D.C. Dulles Intl Airport.
How old do you have to be to fly from London 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 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 required for your trip to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport. 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 to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for flights between London and Washington, D.C. Dulles Intl Airport, the leading plane model is Boeing 777, making up 27.73% of the total bookings. Other popular models include Airbus A380-800 with 15.88%, Boeing 777-300ER with 10.29%, and Airbus A330-900neo with 10.01%.
What is the most popular airline from London to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London to Washington, D.C. Dulles Intl Airport is British Airways (22% of total bookings). The next most popular airlines are Virgin Atlantic (19%), PLAY (16%), and Lufthansa (8%).
Best airlines flying from London to Washington, D.C. Dulles Intl Airport
Compare and see reviews for airlines that fly from London 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 £246 | Free Cancellation | Rating 7.0 102 reviews | |||
| PriceFrom £346 | Free Cancellation | Rating 7.1 1,887 reviews | |||
| PriceFrom £370 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom £377 | Free Cancellation | Rating 7.4 355 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 to Washington, D.C. Dulles Intl Airport
The lowest priced Delta flight from London to Washington, D.C. Dulles Intl Airport from the last 72 hours was £253. Generally, Delta has 7 flights on this route every week with an average price of £743. Delta is rated 8.0/10 by our users.
KLM Flights From London to Washington, D.C. Dulles Intl Airport
Across 1,358 KLM reviews on momondo, the average score is 7.8/10. KLM flies from London to Washington, D.C. Dulles Intl Airport about 7 times each week, with ticket deals ranging from £644 to £851. Price data is based on momondo searches in the last 72 hours.
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.?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.
How can momondo help me find flights from London to Washington, D.C.?
Once you have performed a search for London to Washington, D.C. 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 London to Washington, D.C. right now. Can momondo alert me if prices change?
If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.