Cheap flights from London Heathrow Airport to Washington, D.C. from £411
This is the cheapest return 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 3/9. 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
Iberia flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport
Our best Iberia deals on London Heathrow Airport to Washington, D.C. Reagan-National Airport flight tickets
American Airlines flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport
Our best American Airlines deals on London Heathrow Airport to Washington, D.C. Reagan-National 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. Reagan-National 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 London Heathrow Airport and Washington, D.C. Reagan-National Airport?
What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?
The month of January is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from London Heathrow Airport, with most prices found around £485. If you aren’t able to travel during the month of January, then book flights to Washington, D.C. Reagan-National Airport from London Heathrow Airport during March instead. Flights to Washington, D.C. Reagan-National Airport in March, while not as cheap as those in January, still average around £496.
What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?
The cheapest day to depart from London Heathrow Airport to Washington, D.C. Reagan-National Airport is on a Thursday. Travellers who choose to depart for Washington, D.C. Reagan-National Airport on a Thursday will often find tickets for as low as £550. 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 Washington, D.C. Reagan-National Airport on Saturday is £611.
What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?
Our data shows that the cheapest London Heathrow Airport to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the morning. Our users have found flights to Washington, D.C. Reagan-National Airport in the morning for as low as £564. Try not to purchase tickets in the evening because they tend to be around £624. Of course, these prices can vary depending on the time of year and what airport you fly to.
How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?
You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from London Heathrow Airport when booking 23 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around £639 when searching 23 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from London Heathrow Airport for as low as £473 on momondo.
What is the cheapest airline that flies from London Heathrow to Washington, D.C. Reagan-National?
Scandinavian Airlines, Finnair, and British Airways are the most popular carriers operating from London Heathrow to Washington, D.C. Reagan-National
Which airlines fly to Washington, D.C. Reagan-National Airport?
British Airways, Finnair and Icelandair are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 30% of people opting to fly with this airline when travelling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 9 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport
Cheap London Heathrow Airport to Washington, D.C. Reagan-National Airport (LHR to DCA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Washington, D.C. Reagan-National Airport
How far is London Heathrow to Washington, D.C. Reagan-National by plane?
A flight from London Heathrow to Washington, D.C. Reagan-National will travel around 3651.9 mi. By plane, this route typically takes 11h 07m.
When did momondo last update prices for flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport?
Prices for flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport?
The number of operators available for flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport is 9 as of June 2025.
How old do you have to be to fly from London Heathrow Airport to Washington, D.C. Reagan-National 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. Reagan-National Airport.
What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?
The necessary travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London Heathrow Airport to Washington, D.C. Reagan-National Airport?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Washington, D.C. Reagan-National Airport is British Airways, representing 21% of all bookings. The subsequent popular airlines are Finnair at 19%, Icelandair at 18%, and JetBlue at 12%.
Best airlines flying from London Heathrow Airport to Washington, D.C. Reagan-National Airport
Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. Reagan-National Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £273 | Free Cancellation | Rating 7.0 102 reviews | |||
| PriceFrom £373 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom £375 | Free Cancellation | Rating 7.3 2,925 reviews | |||
| PriceFrom £474 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom £482 | Free Cancellation | Rating 6.6 7,011 reviews | |||
| PriceFrom £485 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom £496 | Free Cancellation | Rating 7.6 1,290 reviews | |||
| PriceFrom £513 | Free Cancellation | Rating 7.1 9,539 reviews | |||
| PriceFrom £545 | Free Cancellation | Rating 7.4 652 reviews |
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.?
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 Washington, D.C. from London.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
Yes. All flights to Washington, D.C. from London on momondo can be compared and filtered by various policies on offer, including flexible booking.
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 simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.