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

Reykjavik (KEF) – chosen by Cheapflights users on 53% of 1-stop itineraries from London to Washington, D.C. on Cheapflights.

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

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $478.

How much does it cost to fly round-trip 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 $561 and $781 in October. The cheapest round-trip price found within the last 3 days was $527 on Multiple Airlines (Oct 9-Oct 12).

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

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

For as low as $541, United Airlines can have you in Washington, D.C. from London in 11h 45m. The distance from London to Washington, D.C. is about 3641 mi. This flight may include one or multiple stops.

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

Flying on Delta is currently your cheapest option to Washington, D.C., with prices starting at $320. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Austrian Airlines, with the lowest prices starting at $390 and $431, respectively. These flights start at 56% lower than the current average price 3 months from now.

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

One-way options have recently been found by users for as low as $521 on Aer Lingus. Other airlines that offer cheap prices include United Airlines from $532 and British Airways from $540 one-way.

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

To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $292). Flying from London to Washington, D.C. in April is currently the most expensive (average of $337). 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.

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

Travelers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Tuesday at noon 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.

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

The most flights from LON to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

While some choose either London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..

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

Looking at all options, your cheapest flight can be booked for $564. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $440 on average, our data indicates $1,014 when flying from London to Washington, D.C..

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

Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: KLM (90%), Air France (90%), Delta( 90%).

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

When booking a flight from London to Washington, D.C., you may want to consider flying on American Airlines, Air Canada or British Airways as they are the most popular for this route.

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

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 13% on your trip compared to booking a flight at noon.

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

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

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

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..

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

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.

$429+ Cheap Flights from London to Washington, D.C.

Round-trip from	$527 (Norse)
One-way from	$429 (Kiwi.com)
Popular in	July
Cheapest in	February
Average price	$666
Good round-trip deal	$653 or less
Good one-way deal	$685 or less

United's Polaris Business Class features lie-flat seats, large screens, and Saks Fifth Avenue bedding.

United's Premium Plus offers bigger seats, extra legroom, and upgraded meals on international flights.

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest$304	Average$387	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$320	Average$949	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$984	FlexibilityNo cancel fee	On-time78%
TAP AIR PORTUGAL	Cheapest$473	Average$714	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$490	Average$680	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$562	Average$741	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$567	Average$826	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$595	Average$843	FlexibilityNo cancel fee	On-time70%
Air Canada	Cheapest$635	Average$663	FlexibilityNo cancel fee	On-time67%

$429+ Cheap flights from London (LON) to Washington, D.C. (WAS)

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Washington, D.C. with Cheapflights

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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 Thursday or Tuesday 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 septiembre 17, 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 septiembre 17, 2025.

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The best insider tips for London to Washington, D.C. flights

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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 round-trip flight from London to Washington, D.C.. Price data was last updated on September 12, 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 septiembre 17, 2025.

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

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

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

How much does it cost to fly round-trip from London to Washington, D.C.?

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

Share of 1-stop round-trip flights from London to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

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

Average round-trip fare for 1-stop flights from London to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

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

Shortest average travel time for 1-stop one-way flights from London to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

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

Average layover duration for 1-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.

Read through reviews of airlines operating flights from London to Washington, D.C., such as United Airlines, Virgin Atlantic, and American Airlines. Reviews also offer insight into each airline's 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.?

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.?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.

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 septiembre 17, 2025.