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

For as low as $612, United Airlines can have you in Washington, D.C. from London in 10h 40m. The distance from London to Washington, D.C. is about 3664 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 Lufthansa is currently your cheapest option to Washington, D.C., with prices starting at $556. Additional round-trip tickets that might be worth considering are offered by American Airlines and British Airways, with the lowest prices starting at $559 and $566, respectively. These flights start at 20% 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 $334 on Virgin Atlantic. Other airlines that offer cheap prices include Icelandair from $407 and Aer Lingus from $412 one-way.

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 $453. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $406 on average, our data indicates $1,973 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: Air Canada (86%), Austrian Airlines (86%), Copa Airlines( 86%).

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 British Airways, Lufthansa or United Airlines as they are the most popular for this route.

Most accurate provider : When it comes to deals on London-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Washington, D.C. flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$215+ Cheap Flights from London to Washington, D.C.

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or January, booked 57 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

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

Cheapest

Best

Last-minute

One-way

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 August 26, 2026.

Thu 9/2411:30 am -

1 stop13h 05m

Sat 10/310:05 pm -

Nonstop7h 35m

Deal found 8/21

$591

Thu 10/15:10 pm -

1 stop27h 25m

Sat 10/1010:05 pm -

Nonstop7h 35m

Deal found 8/22

$592

Thu 10/18:55 am -

1 stop12h 10m

Mon 10/510:05 pm -

Nonstop7h 35m

Deal found 8/23

$593

Fri 10/233:40 pm -

1 stop32h 40m

Sun 11/17:40 pm -

1 stop10h 15m

Deal found 8/23

$593

Thu 10/11:55 pm -

2 stops32h 05m

Sat 10/108:20 pm -

2 stops18h 35m

Deal found 8/23

$594

Wed 10/2811:55 am -

1 stop11h 35m

Tue 11/37:40 pm -

1 stop10h 15m

Deal found 8/21

$594

Sat 11/217:55 am -

2 stops15h 35m

Sat 11/287:40 pm -

2 stops15h 00m

Deal found 8/22

$594

Thu 10/111:00 am -

2 stops35h 00m

Sat 10/108:20 pm -

2 stops18h 15m

Deal found 8/23

$595

Thu 9/31:00 pm -

1 stop11h 20m

Thu 9/108:30 pm -

1 stop13h 10m

Deal found 8/23

$596

Tue 9/89:25 am -

1 stop12h 20m

Tue 9/158:20 pm -

1 stop16h 30m

Deal found 8/21

$597

Wed 10/286:50 pm -

2 stops28h 40m

Sun 11/17:40 pm -

2 stops20h 55m

Deal found 8/22

$597

Tue 10/69:40 am -

1 stop11h 39m

Tue 10/131:20 pm -

1 stop12h 25m

Deal found 8/22

$597

Best flights from London to Washington, D.C.
Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Wed 12/29:00 am -

1 stop13h 00m

Sun 12/610:15 pm -

Nonstop7h 35m

Deal found 8/25

$607

Fri 9/49:55 am -

1 stop10h 40m

Mon 9/710:05 pm -

Nonstop7h 35m

Deal found 8/21

$612

Fri 9/188:40 am -

1 stop11h 55m

Mon 9/2110:05 pm -

Nonstop7h 35m

Deal found 8/25

$613

Sat 10/108:30 am -

1 stop11h 40m

Sat 10/174:02 pm -

1 stop11h 28m

Deal found 8/25

$613

Tue 9/2210:35 am -

1 stop14h 00m

Tue 12/112:35 pm -

2 stops22h 10m

Deal found 8/24

$623

Sun 9/68:50 am -

1 stop11h 55m

Thu 9/175:45 pm -

Nonstop7h 35m

Deal found 8/22

$632

Sat 10/109:25 am -

1 stop12h 20m

Sat 10/178:20 pm -

1 stop16h 30m

Deal found 8/25

$652

Thu 10/83:40 pm -

1 stop32h 45m

Tue 10/1311:20 pm -

1 stop10h 20m

Deal found 8/26

$667

Thu 12/1710:10 am -

2 stops39h 25m

Tue 1/55:25 pm -

2 stops35h 00m

Deal found 8/25

$716

Tue 11/245:20 pm -

1 stop23h 25m

Tue 12/19:20 pm -

1 stop38h 00m

Deal found 8/22

$934

Sat 10/248:45 am -

1 stop13h 00m

Wed 10/287:20 pm -

Nonstop7h 20m

Deal found 8/23

$614

Wed 10/281:20 pm -

Nonstop8h 40m

Thu 11/58:45 pm -

Nonstop7h 25m

Deal found 8/21

$625

Thu 10/19:40 am -

1 stop11h 24m

Sat 10/105:15 pm -

1 stop11h 00m

Deal found 8/22

$631

Thu 10/19:25 am -

2 stops14h 55m

Tue 10/68:30 pm -

2 stops20h 40m

Deal found 8/25

$641

Wed 10/710:25 am -

1 stop14h 45m

Wed 10/1410:14 am -

2 stops18h 11m

Deal found 8/23

$641

Sun 11/2212:55 pm -

1 stop11h 20m

Mon 11/305:14 pm -

1 stop10h 21m

Deal found 8/24

$658

Wed 10/78:40 am -

1 stop13h 05m

Wed 10/146:35 pm -

Nonstop7h 20m

Deal found 8/20

$615

Wed 9/93:40 pm -

1 stop32h 45m

Sun 10/258:40 pm -

1 stop13h 00m

Deal found 8/23

$677

Sat 10/109:00 am -

1 stop12h 45m

Sat 10/178:20 pm -

1 stop12h 25m

Deal found 8/25

$689

Tue 12/158:40 am -

1 stop12h 05m

Wed 12/306:40 pm -

1 stop10h 50m

Deal found 8/25

$635

Wed 11/410:00 am -

2 stops19h 42m

Sat 11/76:40 pm -

1 stop16h 05m

Deal found 8/25

$641

Fri 10/99:20 am -

1 stop11h 15m

Mon 10/126:10 pm -

1 stop9h 40m

Deal found 8/23

$647

Wed 12/29:35 am -

2 stops34h 40m

Sun 12/610:30 pm -

2 stops17h 05m

Deal found 8/22

$717

Mon 9/143:00 pm -

1 stop11h 59m

Tue 9/296:23 pm -

1 stop10h 27m

Deal found 8/21

$658

Mon 10/269:30 am -

1 stop11h 25m

Fri 10/306:10 am -

1 stop11h 10m

Deal found 8/24

$622

Tue 10/137:10 am -

2 stops20h 05m

Sat 10/1711:20 pm -

2 stops19h 45m

Deal found 8/24

$687

Wed 9/93:40 pm -

1 stop32h 45m

Tue 9/158:30 pm -

1 stop13h 10m

Deal found 8/23

$693

Tue 9/227:15 pm -

1 stop25h 10m

Tue 9/295:45 pm -

1 stop13h 50m

Deal found 8/22

$696

Fri 9/184:20 pm -

1 stop11h 39m

Mon 9/216:10 am -

1 stop9h 00m

Deal found 8/24

$635

Tue 10/610:35 am -

1 stop14h 00m

Tue 10/139:45 pm -

1 stop13h 15m

Deal found 8/22

$641

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated August 26, 2026 and is based on user searches.

Thu 9/31:00 pm -

1 stop11h 20m

Thu 9/108:30 pm -

1 stop13h 10m

Deal found 8/23

$596

Fri 9/43:40 pm -

1 stop11h 35m

Thu 9/108:30 pm -

1 stop13h 10m

Deal found 8/21

$593

Sat 9/58:40 am -

1 stop11h 55m

Tue 9/812:25 pm -

1 stop13h 20m

Deal found 8/21

$597

Sat 9/53:40 pm -

1 stop11h 35m

Thu 9/108:30 pm -

1 stop13h 10m

Deal found 8/23

$598

Tue 9/89:25 am -

1 stop12h 20m

Tue 9/158:20 pm -

1 stop16h 30m

Deal found 8/21

$597

Wed 9/96:00 am -

1 stop15h 45m

Sun 9/138:20 pm -

1 stop11h 40m

Deal found 8/21

$598

Wed 9/96:00 am -

1 stop15h 45m

Wed 11/48:10 pm -

1 stop15h 10m

Deal found 8/23

$599

Thu 9/101:00 pm -

1 stop11h 20m

Wed 10/711:20 pm -

1 stop10h 20m

Deal found 8/21

$599

Sat 9/196:00 am -

1 stop15h 45m

Tue 10/68:20 pm -

1 stop15h 05m

Deal found 8/21

$596

Thu 9/2411:30 am -

1 stop13h 05m

Sat 10/310:05 pm -

Nonstop7h 35m

Deal found 8/21

$591

Mon 9/286:00 am -

1 stop13h 00m

Fri 10/23:47 pm -

1 stop12h 13m

Deal found 8/24

$595

Wed 9/303:50 pm -

Nonstop8h 25m

Tue 10/610:05 pm -

Nonstop7h 35m

Deal found 8/21

$600

One-way flights from London to Washington, D.C.
Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

Wed 9/236:30 am -

2 stops31h 55m

Deal found 8/21

$215

Thu 9/245:30 pm -

2 stops51h 38m

Deal found 8/21

$215

Wed 10/216:30 am -

2 stops31h 33m

Deal found 8/21

$218

Wed 9/239:45 am -

2 stops28h 40m

Deal found 8/21

$222

Fri 9/256:35 am -

2 stops38h 33m

Deal found 8/21

$224

Thu 9/2410:05 pm -

3 stops47h 03m

Deal found 8/21

$245

Mon 9/2810:45 pm -

3 stops38h 46m

Deal found 8/21

$265

Tue 10/1310:35 pm -

3 stops39h 28m

Deal found 8/21

$266

Mon 9/288:40 am -

3 stops37h 06m

Deal found 8/21

$268

Tue 10/133:00 pm -

3 stops47h 03m

Deal found 8/21

$274

Thu 10/221:10 pm -

2 stops24h 53m

Deal found 8/21

$274

Tue 10/208:50 pm -

3 stops41h 13m

Deal found 8/21

$284

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$591 (TravelUp)
One-way from	$215 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$712
Good round-trip deal	$475 or less
Good one-way deal	$479 or less

Provider with most accurate pricing for London (LON)-Washington, D.C. (WAS) flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. (WAS) flights.

Search Deals

From London (LON) to Washington, D.C. (WAS)

Search Deals

One-way flight from London (LON) to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($73 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from London (LON) to Washington, D.C. (WAS).

Search Deals

Price to beat on a one-way flight from London (LON) to Washington, D.C. (WAS).

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Wed 12/2

9:00 am-5:00 pm

1 stop13h 00m

Washington, D.C. Dulles Intl

Sun 12/6

10:15 pm-10:50 am

Nonstop7h 35m

$607

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Fri 9/4

9:55 am-3:35 pm

1 stop10h 40m

Washington, D.C. Dulles Intl

Mon 9/7

10:05 pm-10:40 am

Nonstop7h 35m

$612

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Fri 9/18

8:40 am-3:35 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Mon 9/21

10:05 pm-10:40 am

Nonstop7h 35m

$613

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Sat 10/10

8:30 am-3:10 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Sat 10/17

4:02 pm-8:30 am

1 stop11h 28m

$613

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Sat 10/24

8:45 am-4:45 pm

1 stop13h 00m

Washington, D.C. Dulles Intl

Wed 10/28

7:20 pm-6:40 am

Nonstop7h 20m

$614

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Wed 10/7

8:40 am-4:45 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Wed 10/14

6:35 pm-6:55 am

Nonstop7h 20m

$615

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Mon 10/26

9:30 am-4:55 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Fri 10/30

6:10 am-9:20 pm

1 stop11h 10m

$622

LondonWashington, D.C.

LGW London Gatwick - IAD Washington, D.C. Dulles Intl

LGWIAD

London Gatwick

Tue 9/22

10:35 am-7:35 pm

1 stop14h 00m

Washington, D.C. Dulles Intl

Tue 12/1

12:35 pm-3:45 pm

2 stops22h 10m

$623

Quickest round-trip

LondonWashington, D.C.

LHR London Heathrow - IAD Washington, D.C. Dulles Intl

LHRIAD

London Heathrow

Wed 10/28

1:20 pm-6:00 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

Thu 11/5

8:45 pm-9:10 am

Nonstop7h 25m

$625

LondonWashington, D.C.

LHR London Heathrow - DCA Washington, D.C. Reagan-National

LHRDCA

London Heathrow

Thu 10/1

9:40 am-4:04 pm

1 stop11h 24m

Washington, D.C. Reagan-National

Sat 10/10

5:15 pm-9:15 am

1 stop11h 00m

$631

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Showing 1-10 of 60 resultsSorted by cheapest first

...

Compare providers for flights from London to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Washington, D.C. in August.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Washington, D.C. flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

LON-WAS

LHR-IAD

LGW-IAD

STN-IAD

LHR-DCA

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

LON-WAS

LHR-IAD

LGW-IAD

STN-IAD

LHR-DCA

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

Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $633). Flying from London to Washington, D.C. in June is currently the most expensive (average of $775). 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 time of day to fly from LON to WAS?

When flying from London to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The most flights from LON to WAS are scheduled on a Tuesday (29 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

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 $615 and $799 in September.
The cheapest round-trip price found within the last 5 days was $591 on Virgin Atlantic (Sep 24-Oct 3).

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

Dublin (DUB) – chosen by Cheapflights users on 44% 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.?

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $519.

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 05m.

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 25m.

How often are flights from London to Washington, D.C. delayed?

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 140 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

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 81 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.

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

Cheapflights partnered with top experts to bring you the best recommendations for your London to Washington, D.C. trip

Our travel experts

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Ramsey Qubein

Expert on LHR and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read through reviews of airlines operating flights from London to Washington, D.C., such as United Airlines,Virgin Atlantic, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

United Airlines

7.4

Good

10,125 reviews

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Virgin Atlantic

7.4

Good

695 reviews

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

American Airlines

7.1

Good

11,995 reviews

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Lufthansa

6.8

Okay

8,223 reviews

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

British Airways

6.7

Okay

8,192 reviews

United Airlines

7.4

Good

10,125 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

How long is the flight from London to Washington, D.C.?
For as low as $612, United Airlines can have you in Washington, D.C. from London in 10h 40m. The distance from London to Washington, D.C. is about 3664 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 Lufthansa is currently your cheapest option to Washington, D.C., with prices starting at $556. Additional round-trip tickets that might be worth considering are offered by American Airlines and British Airways, with the lowest prices starting at $559 and $566, respectively. These flights start at 20% 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 $334 on Virgin Atlantic. Other airlines that offer cheap prices include Icelandair from $407 and Aer Lingus from $412 one-way.
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 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: Air Canada (86%), Austrian Airlines (86%), Copa Airlines( 86%).
What are the cheapest flights from London to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $453. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $406 on average, our data indicates $1,973 when flying from London to Washington, D.C..
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.
What is the cheapest month to book a flight from London to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $633). Flying from London to Washington, D.C. in June is currently the most expensive (average of $775). 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.

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Top 9 airlines flying from London to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$535	Average$636	FlexibilityNo cancel fee	On-time76%
Lufthansa	Cheapest$556	Average$740	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$559	Average$835	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$566	Average$732	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$567	Average$791	FlexibilityNo cancel fee	On-time69%
Austrian Airlines	Cheapest$567	Average$743	FlexibilityNo cancel fee	On-time78%
Delta	Cheapest$591	Average$872	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$640	Average$776	FlexibilityNo cancel fee	On-time72%
Aer Lingus	Cheapest$658	Average$786	FlexibilityNo cancel fee	On-timeN/A

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$215+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap 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 August 26, 2026.

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 August 26, 2026.

Best flights from London to Washington, D.C.Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Last-minute flights from London to Washington, D.C.Discover last-minute flight deals from London to Washington, D.C.. Data last updated August 26, 2026 and is based on user searches.

Discover last-minute flight deals from London to Washington, D.C.. Data last updated August 26, 2026 and is based on user searches.

One-way flights from London to Washington, D.C.Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

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Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Compare providers for flights from London to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Washington, D.C. in August.

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

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 August 26, 2026.

When flying from London to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The most flights from LON to WAS are scheduled on a Tuesday (29 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

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 $615 and $799 in September.The cheapest round-trip price found within the last 5 days was $591 on Virgin Atlantic (Sep 24-Oct 3).

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.

Dublin (DUB) – chosen by Cheapflights users on 44% 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.?

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.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $519.

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.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 05m.

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.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 25m.

How often are flights from London to Washington, D.C. delayed?

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 140 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

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 81 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.

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

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your London to Washington, D.C. trip

Our travel experts

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, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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.?

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 August 26, 2026.

Best flights from London to Washington, D.C.
Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated August 26, 2026 and is based on user searches.

One-way flights from London to Washington, D.C.
Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

London to Washington, D.C. flights typically cost between $615 and $799 in September.
The cheapest round-trip price found within the last 5 days was $591 on Virgin Atlantic (Sep 24-Oct 3).