Q: How much does it cost for a return flight from London to Washington, D.C.?

Airfare is below average for this route at the moment. London to Washington, D.C. flights typically cost between £496 and £792 in September. The cheapest return flight price found within the last 3 days was £423 on Icelandair (25 Sept-1 Oct).

Question 1

What’s the top stopover airport for flights from London to Washington, D.C.?

Accepted Answer

Reykjavik (KEF) – chosen by Cheapflights users on 51% of one-stop itineraries from London to Washington, D.C. on Cheapflights.

Question 2

What’s the cheapest stopover airport for flights from London to Washington, D.C.?

Accepted Answer

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £289.

Question 3

Which airport typically offers the quickest stopover for flights from London to Washington, D.C.?

Accepted Answer

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 10m.

Question 4

What’s the fastest stopover option from London to Washington, D.C.?

Accepted Answer

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 10h 35m.

Question 5

How much does it cost for a return flight from London to Washington, D.C.?

Accepted Answer

Airfare is below average for this route at the moment.London to Washington, D.C. flights typically cost between £496 and £792 in September.
The cheapest return flight price found within the last 3 days was £423 on Icelandair (25 Sept-1 Oct).

Question 6

How long is the flight from London to Washington, D.C.?

Accepted Answer

For as low as £426, Icelandair can have you in Washington, D.C. from London in 11h. The distance from London to Washington, D.C. is about 3641 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

Question 7

What are the cheapest airlines flying from London to Washington, D.C. round-trip?

Accepted Answer

According to our current data, Delta (£187), PLAY (£247), and Icelandair (£344) offers the cheapest pricing from London to Washington, D.C.. Users have found that Delta is 65% cheaper than the other options available to this destination.

Question 8

What are the cheapest airlines to fly from London to Washington, D.C. one-way?

Accepted Answer

For one-way options, check prices for PLAY. According to our data, you can fly for as low as £225. Users have also found prices from £397 and £398 on TAP AIR PORTUGAL and Icelandair, respectively.

Question 9

How far ahead should I book a flight from London to Washington, D.C.?

Accepted Answer

Booking 84 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 10

What is the cheapest month to book a flight from London to Washington, D.C.?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 11

What is the cheapest day to fly from London to Washington, D.C.?

Accepted Answer

Travellers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 12

Weekly flight availability from London to Washington, D.C.

Accepted Answer

The most flights from LON to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 on average).

Question 13

E

Accepted Answer

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Question 14

E

Accepted Answer

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Question 15

What are the most popular routes from London to Washington, D.C.?

Accepted Answer

When deciding which route to take from London to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Gatwick - Washington, D.C. Dulles Intl as they are the most popular.

Question 16

What are the cheapest flights from London to Washington, D.C.?

Accepted Answer

While on average a flight from London to Washington, D.C. is generally £1,372, our data shows the cheapest flight currently is £405. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £384 for that flight.

Question 17

What are the most reliable airlines from London to Washington, D.C.?

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. on time: KLM (75%), Air France (75%), Delta (75%).

Question 18

What are the most popular airlines that fly from London to Washington, D.C.?

Accepted Answer

Before booking your flight from London to Washington, D.C. check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

Question 19

Where are the most common stopover locations when flying from London to Washington, D.C.?

Accepted Answer

Most of the time, London to Washington, D.C. flights that have stopovers will stop in Reykjavik.

Question 20

Where are the least popular stopover locations for London to Washington, D.C. flights?

Accepted Answer

Flights departing from London and landing in Washington, D.C. stopover in Dublin least frequently.

Question 21

What are some popular things to do or see while on a stopover in Reykjavik?

Accepted Answer

If you're on a stopover in Reykjavik and looking for things to do, consider visiting Harpa, National Cathedral, or Reykjavik Free Church. Travelers on a layover in Reykjavik can visit Harpa, National Cathedral, and Reykjavik Free Church, by traveling 23.3 mi, 23.0 mi, and 22.9 mi, respectively after landing at Reykjavik Keflavik Intl. Travellers can book a car hire at Reykjavik Keflavik Intl for about £44 per day to make their sightseeing more efficient.

Question 22

What is the cheapest day to fly round-trip from London to Washington, D.C.?

Accepted Answer

Users have found that flying from London to Washington, D.C. on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Question 23

How far in advance should I book a flight from London to Washington, D.C.?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 51 days in advance, which can save you up to 44% on flights from London to Washington, D.C. compared to booking the week you need them. Waiting 51 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £539. For sooner than that we have options available in the next 3 days from £830.

Question 24

What is the cheapest month to fly from London to Washington, D.C.?

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from London in February are about £542 on average during February, but can be found for as low as £225.

Question 25

What is the cheapest time of day to fly from LON to WAS?

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the evening. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the afternoon.

Question 26

Can I find deals for flights from London to Washington, D.C. that include hotel bookings?

Accepted Answer

Yes. In addition to deals on London to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 27

How can I find direct flights from London to Washington, D.C.?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Washington, D.C..

Question 28

Can I find deals for business class flights from London to Washington, D.C.?

Accepted Answer

Yes. Cheapflights offers flight deals from London to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 29

How does Cheapflights help users find flights from London to Washington, D.C.?

Accepted Answer

When you search for this flight from London to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 30

Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from London to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 31

Can Cheapflights find flights from London to Washington, D.C. with no change fees?

Accepted Answer

Need flexible booking options for your flight to Washington, D.C. from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 32

Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?

Accepted Answer

Of course! You can now track prices for flights from London to Washington, D.C. and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	£423
One-way from	£187
Popular in	July
Cheapest in	February
Average price	£604
Good round-trip deal	£487 or less
Good one-way deal	£597 or less

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£187	Average£530	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£247	Average£384	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	Cheapest£350	Average£512	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£352	Average£512	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
JetBlue	Cheapest£372	Average£627	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£434	Average£623	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£435	Average£610	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Air France	Cheapest£435	Average£588	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Scandinavian Airlines	Cheapest£435	Average£569	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
United Airlines	Cheapest£443	Average£642	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Cheap flights from London to Washington, D.C. from £187

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or November, booked 84 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from London to Washington, D.C.

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Find flight deals from London to Washington, D.C.

Cheapest flights from London to Washington, D.C.Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

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Best time to book a flight from London to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C.

How far ahead should I book a flight from London to Washington, D.C.?

Use this chart to determine the optimal time to book a return flight from London to Washington, D.C.. Price data was last updated on 8 August 2025.

What is the cheapest month to book a flight from London to Washington, D.C.?

What is the cheapest time of day to fly from LON to WAS?

Find hourly flight availability from London to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 August 2025.

What is the cheapest day to fly from London to Washington, D.C.?

Use this chart to determine the cheapest time to fly return from London to Washington, D.C.. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Washington, D.C.

How much does it cost for a return flight from London to Washington, D.C.?

What’s the top stopover airport for flights from London to Washington, D.C.?

Share of one-stop return flights from London to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from London to Washington, D.C.?

Average return fare for one-stop flights from London to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from London to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from London to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C.?

Average stopover duration for one-stop one-way flights from London to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Washington, D.C.

Check out reviews from past customers who have flown with Virgin Atlantic, Icelandair, andPLAY from London to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London to Washington, D.C.?

What are the cheapest airlines flying from London to Washington, D.C. round-trip?

What are the cheapest airlines to fly from London to Washington, D.C. one-way?

What are the most popular routes from London to Washington, D.C.?

What are the most reliable airlines from London to Washington, D.C.?

What are the cheapest flights from London to Washington, D.C.?

Where are the most common stopover locations when flying from London to Washington, D.C.?

What are some popular things to do or see while on a stopover in Reykjavik?

Where are the least popular stopover locations for London to Washington, D.C. flights?

Can I find deals for flights from London to Washington, D.C. that include hotel bookings?

How can I find direct flights from London to Washington, D.C.?

Can I find deals for business class flights from London to Washington, D.C.?

What is the cheapest month to book a flight from London to Washington, D.C.?

Travelling to a place near Washington, D.C.?

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Fly from London to Washington, D.C. on these airlines

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Top 10 airlines flying from London to Washington, D.C.

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How does Cheapflights help users find flights from London to Washington, D.C.?

Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?

Can Cheapflights find flights from London to Washington, D.C. with no change fees?

Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?

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Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.