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

For as low as $570, United Airlines can have you in Washington, D.C. from London in 8h 15m. 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 American Airlines is currently your cheapest option to Washington, D.C., with prices starting at $528. Additional round-trip tickets that might be worth considering are offered by United Airlines and Lufthansa, with the lowest prices starting at $544 and $556, respectively. These flights start at 24% 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 Gatwick - Washington, D.C. Dulles Intl, 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 $452. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $433 on average, our data indicates $2,134 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 (78%), Austrian Airlines (78%), Copa Airlines( 78%).

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 Virgin Atlantic 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.

$288+ Cheap Flights from London to Washington, D.C.

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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 Wednesday or Friday 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 September 28, 2026.

Thu 10/296:50 am -

2 stops17h 33m

Thu 11/51:19 pm -

1 stop15h 01m

Deal found 9/28

$545

Thu 10/298:25 pm -

1 stop24h 30m

Thu 11/58:45 pm -

Nonstop7h 25m

Deal found 9/28

$547

Thu 10/296:50 am -

2 stops17h 33m

Tue 11/101:19 pm -

1 stop12h 51m

Deal found 9/28

$548

Sat 10/36:50 am -

1 stop11h 40m

Tue 10/64:00 pm -

1 stop9h 35m

Deal found 9/26

$549

Thu 10/229:25 am -

1 stop12h 20m

Thu 10/299:10 pm -

1 stop16h 40m

Deal found 9/24

$549

Sat 10/36:50 am -

2 stops15h 08m

Sat 10/1711:45 am -

2 stops13h 45m

Deal found 9/25

$549

Sat 10/33:50 pm -

Nonstop8h 25m

Sun 10/1110:05 pm -

Nonstop7h 35m

Deal found 9/25

$550

Sun 10/410:25 am -

1 stop14h 10m

Sat 10/176:15 pm -

1 stop10h 05m

Deal found 9/27

$550

Fri 11/209:40 am -

1 stop13h 19m

Mon 11/306:45 pm -

1 stop10h 10m

Deal found 9/27

$550

Fri 10/239:15 am -

1 stop12h 30m

Fri 10/309:10 pm -

1 stop10h 30m

Deal found 9/27

$550

Wed 10/78:40 am -

2 stops32h 10m

Mon 10/125:13 pm -

1 stop32h 57m

Deal found 9/28

$551

Tue 11/248:40 am -

1 stop13h 20m

Tue 12/18:10 pm -

1 stop30h 30m

Deal found 9/24

$551

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 September 28, 2026.

Sat 11/214:20 pm -

Nonstop8h 55m

Sun 11/2910:15 pm -

Nonstop7h 35m

Deal found 9/25

$570

Thu 10/1512:15 pm -

Nonstop8h 15m

Sat 10/247:20 pm -

Nonstop7h 20m

Deal found 9/27

$570

Wed 10/1410:25 am -

1 stop14h 10m

Tue 11/36:40 pm -

1 stop16h 05m

Deal found 9/26

$573

Thu 10/83:50 pm -

1 stop12h 05m

Wed 12/91:25 pm -

1 stop12h 25m

Deal found 9/23

$577

Tue 11/310:00 am -

1 stop10h 45m

Thu 11/125:45 pm -

1 stop9h 25m

Deal found 9/23

$596

Thu 11/267:40 am -

1 stop13h 40m

Mon 11/308:50 pm -

1 stop10h 50m

Deal found 9/26

$609

Sun 12/1310:40 am -

1 stop14h 55m

Thu 1/75:25 pm -

1 stop17h 25m

Deal found 9/27

$650

Thu 10/223:40 pm -

1 stop11h 35m

Mon 10/268:40 pm -

1 stop10h 15m

Deal found 9/25

$650

Tue 11/39:20 am -

1 stop11h 35m

Thu 11/58:55 am -

1 stop17h 00m

Deal found 9/27

$778

Mon 11/3011:45 am -

2 stops36h 30m

Thu 5/61:56 pm -

2 stops15h 54m

Deal found 9/23

$840

Sun 12/277:05 pm -

1 stop25h 25m

Sun 1/35:25 pm -

1 stop14h 25m

Deal found 9/27

$879

Tue 11/105:20 pm -

1 stop31h 05m

Tue 11/179:20 pm -

1 stop38h 00m

Deal found 9/26

$978

Thu 10/154:40 pm -

Nonstop8h 40m

Fri 10/2310:05 pm -

Nonstop7h 35m

Deal found 9/25

$570

Wed 12/212:05 pm -

Nonstop8h 35m

Sun 12/66:20 pm -

Nonstop7h 20m

Deal found 9/27

$571

Thu 10/2210:25 am -

1 stop14h 10m

Mon 10/267:40 pm -

1 stop16h 05m

Deal found 9/28

$574

Thu 10/298:55 am -

1 stop13h 32m

Tue 11/102:00 pm -

1 stop11h 25m

Deal found 9/24

$577

Tue 12/19:20 am -

1 stop11h 25m

Sun 12/65:45 pm -

1 stop9h 25m

Deal found 9/23

$597

Mon 10/2612:05 pm -

Nonstop8h 35m

Mon 11/210:15 pm -

Nonstop7h 35m

Deal found 9/27

$571

Thu 10/224:40 pm -

Nonstop8h 40m

Mon 10/267:20 pm -

Nonstop7h 20m

Deal found 9/27

$571

Wed 12/27:40 am -

1 stop13h 40m

Sun 12/65:15 pm -

1 stop19h 15m

Deal found 9/25

$631

Wed 11/41:20 pm -

Nonstop8h 40m

Wed 11/116:55 pm -

Nonstop7h 25m

Deal found 9/23

$575

Sun 2/2810:00 am -

2 stops18h 02m

Sun 3/76:40 pm -

1 stop16h 05m

Deal found 9/27

$589

Fri 10/99:25 pm -

1 stop27h 00m

Sun 1/247:40 pm -

1 stop18h 50m

Deal found 9/24

$653

Wed 12/24:35 pm -

1 stop27h 40m

Sun 12/610:30 pm -

1 stop12h 15m

Deal found 9/24

$668

Wed 10/212:10 pm -

1 stop26h 59m

Sun 10/253:00 pm -

1 stop15h 25m

Deal found 9/27

$571

Sat 11/149:40 am -

1 stop15h 22m

Sat 11/2111:13 am -

1 stop15h 02m

Deal found 9/25

$575

Sun 11/81:45 pm -

2 stops24h 24m

Sun 11/156:20 pm -

2 stops17h 15m

Deal found 9/24

$598

Wed 10/213:00 pm -

1 stop12h 17m

Mon 10/267:55 pm -

Nonstop7h 10m

Deal found 9/25

$668

Thu 10/89:20 pm -

2 stops22h 05m

Wed 12/910:30 pm -

1 stop11h 35m

Deal found 9/23

$692

Wed 12/164:20 pm -

Nonstop8h 55m

Mon 12/2810:15 pm -

Nonstop7h 35m

Deal found 9/25

$572

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated September 28, 2026 and is based on user searches.

Sat 10/36:50 am -

1 stop11h 40m

Tue 10/64:00 pm -

1 stop9h 35m

Deal found 9/26

$549

Sat 10/36:50 am -

2 stops15h 08m

Sat 10/1711:45 am -

2 stops13h 45m

Deal found 9/25

$549

Sat 10/33:50 pm -

Nonstop8h 25m

Sun 10/1110:05 pm -

Nonstop7h 35m

Deal found 9/25

$550

Sat 10/38:30 am -

1 stop29h 25m

Fri 10/168:40 pm -

1 stop28h 55m

Deal found 9/26

$550

Sun 10/410:25 am -

1 stop14h 10m

Sat 10/176:15 pm -

1 stop10h 05m

Deal found 9/27

$550

Tue 10/66:55 am -

2 stops14h 10m

Tue 10/2010:20 pm -

1 stop13h 45m

Deal found 9/28

$552

Wed 10/78:40 am -

2 stops32h 10m

Mon 10/125:13 pm -

1 stop32h 57m

Deal found 9/28

$551

Wed 10/78:40 am -

2 stops19h 15m

Mon 10/267:40 pm -

1 stop12h 00m

Deal found 9/27

$551

Wed 10/78:40 am -

2 stops19h 15m

Mon 10/126:08 am -

1 stop19h 37m

Deal found 9/27

$552

Thu 10/229:25 am -

1 stop12h 20m

Thu 10/299:10 pm -

1 stop16h 40m

Deal found 9/24

$549

Fri 10/239:15 am -

1 stop12h 30m

Fri 10/309:10 pm -

1 stop10h 30m

Deal found 9/27

$550

Wed 10/2810:00 am -

1 stop10h 55m

Mon 11/236:15 pm -

1 stop9h 35m

Deal found 9/25

$551

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 September 28, 2026.

Tue 12/812:15 pm -

1 stop11h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/23

$288

Sun 3/218:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$378

Sun 12/278:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$379

Tue 12/2911:55 am -

1 stop11h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$379

Tue 12/158:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/28

$381

Tue 3/238:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$384

Tue 11/2412:15 pm -

1 stop11h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$385

Wed 2/1011:55 am -

1 stop11h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$385

Sun 11/228:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$388

Tue 11/1712:15 pm -

1 stop11h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$389

Sun 1/248:35 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$390

Wed 3/1711:55 am -

1 stop11h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/23

$390

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$549 (Cheapflightsfares)
One-way from	$288
Popular in	June
Cheapest in	February
Average price	$667
Good round-trip deal	$582 or less
Good one-way deal	$532 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. 8% potential increase in price ($68 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 September 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

LondonBaltimore

LHR London Heathrow - BWI Baltimore/Washington

LHRBWI

London Heathrow

Sun 2/28

8:35 pm-6:40 pm

1 stop27h 05m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$416

LondonBaltimore

LGW London Gatwick - BWI Baltimore/Washington

LGWBWI

London Gatwick

Thu 10/29

11:00 am-8:57 pm

1 stop13h 57m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$460

LondonBaltimore

LGW London Gatwick - BWI Baltimore/Washington

LGWBWI

London Gatwick

Thu 1/7

11:00 am-12:44 am

1 stop18h 44m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$460

LondonBaltimore

LGW London Gatwick - BWI Baltimore/Washington

LGWBWI

London Gatwick

Tue 10/27

10:10 am-6:12 pm

1 stop36h 02m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$472

LondonBaltimore

LGW London Gatwick - BWI Baltimore/Washington

LGWBWI

London Gatwick

Sat 11/21

10:00 am-8:52 pm

2 stops15h 52m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$480

LondonBaltimore

LHR London Heathrow - BWI Baltimore/Washington

LHRBWI

London Heathrow

Mon 3/1

11:45 am-10:00 am

2 stops27h 15m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$485

LondonBaltimore

LHR London Heathrow - BWI Baltimore/Washington

LHRBWI

London Heathrow

Thu 3/4

10:00 am-10:55 pm

2 stops17h 55m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$485

LondonWashington, D.C.

STN London Stansted - IAD Washington, D.C. Dulles Intl

STNIAD

London Stansted

Tue 1/5

10:15 am-2:45 pm

3 stops33h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$485

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Wed 3/17

5:20 pm-5:20 pm

2 stops28h 00m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$487

LondonBaltimore

LGW London Gatwick - BWI Baltimore/Washington

LGWBWI

London Gatwick

Sun 2/28

10:00 am-10:00 am

2 stops29h 00m

Baltimore/Washington

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$489

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

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 September.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
Gotogate	Price Accuracy2 stars	Trust Score*3 stars
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

LHR-DCA

LCY-IAD

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

LHR-DCA

LCY-IAD

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 $643). Flying from London to Washington, D.C. in June is currently the most expensive (average of $774). 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 Wednesday (29 on average). You will have fewer flight options on Friday, 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 $599 and $791 in October.
The cheapest round-trip price found within the last 5 days was $549 on SWISS (Oct 20-Nov 6).

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

Dublin (DUB) – chosen by Cheapflights users on 43% 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 $446.

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 38m.

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 morning are less likely to be delayed, whereas flights leaving in the evening 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, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,247 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

10,247 reviews

United Airlines

7.4

Good

10,247 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

694 reviews

United Airlines

7.4

Good

10,247 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

Icelandair

6.9

Okay

753 reviews

United Airlines

7.4

Good

10,247 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

8,245 reviews

United Airlines

7.4

Good

10,247 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

8,238 reviews

United Airlines

7.4

Good

10,247 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 $570, United Airlines can have you in Washington, D.C. from London in 8h 15m. 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 American Airlines is currently your cheapest option to Washington, D.C., with prices starting at $528. Additional round-trip tickets that might be worth considering are offered by United Airlines and Lufthansa, with the lowest prices starting at $544 and $556, respectively. These flights start at 24% 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 Gatwick - Washington, D.C. Dulles Intl, 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 (78%), Austrian Airlines (78%), Copa Airlines( 78%).
What are the cheapest flights from London to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $452. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $433 on average, our data indicates $2,134 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 $643). Flying from London to Washington, D.C. in June is currently the most expensive (average of $774). 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 10 airlines flying from London to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$535	Average$624	FlexibilityNo cancel fee	On-time76%
Lufthansa	Cheapest$556	Average$740	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$563	Average$818	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$566	Average$741	FlexibilityNo cancel fee	On-time70%
Austrian Airlines	Cheapest$567	Average$743	FlexibilityNo cancel fee	On-time78%
American Airlines	Cheapest$568	Average$839	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$581	Average$757	FlexibilityNo cancel fee	On-time72%
Delta	Cheapest$581	Average$872	FlexibilityNo cancel fee	On-timeN/A
Air France	Cheapest$582	Average$730	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$658	Average$783	FlexibilityNo cancel fee	On-timeN/A

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$288+ Cheap flights from London (LON) to Washington, D.C. (WAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. 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 September 28, 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 September 28, 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 September 28, 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 September 28, 2026.

Last-minute flights from London to Washington, D.C.Discover last-minute flight deals from London to Washington, D.C.. Data last updated September 28, 2026 and is based on user searches.

Discover last-minute flight deals from London to Washington, D.C.. Data last updated September 28, 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 September 28, 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 September 28, 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 September.

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 September 28, 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 Wednesday (29 on average). You will have fewer flight options on Friday, 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 $599 and $791 in October.The cheapest round-trip price found within the last 5 days was $549 on SWISS (Oct 20-Nov 6).

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 43% 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.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $446.

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 38m.

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 morning are less likely to be delayed, whereas flights leaving in the evening 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, andIcelandair. 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 September 28, 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 September 28, 2026.

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated September 28, 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 September 28, 2026.

London to Washington, D.C. flights typically cost between $599 and $791 in October.
The cheapest round-trip price found within the last 5 days was $549 on SWISS (Oct 20-Nov 6).