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Cheap flights from Washington, D.C. to London from £218

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
9 May — 16 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in September or January, booked 52 days in advance, depart on a Sunday or Tuesday and return on a Wednesday

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

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to London
Explore the most affordable flight options available from Washington, D.C. to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 April 2026.

Sun 26/422:35
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Wed 6/506:00
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Deal found 5/4£486
Sat 2/522:35
IAD
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Tue 5/506:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 4/4£487
Mon 27/422:35
IAD
-
LGW
1 stop12h 00m
TAP AIR PORTUGAL
Tue 19/516:25
LGW
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 5/4£487
Mon 20/422:35
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Wed 29/419:50
LHR
-
IAD
1 stop24h 20m
TAP AIR PORTUGAL
Deal found 7/4£487
Mon 27/422:35
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Wed 6/519:50
LHR
-
IAD
1 stop24h 20m
TAP AIR PORTUGAL
Deal found 6/4£488
Wed 15/413:20
IAD
-
LGW
1 stop18h 50m
Turkish Airlines
Fri 24/417:35
LGW
-
IAD
1 stop23h 00m
Turkish Airlines
Deal found 6/4£489
Sun 26/420:20
IAD
-
LHR
1 stop20h 20m
Scandinavian Airlines
Wed 29/419:30
LHR
-
IAD
1 stop26h 30m
Scandinavian Airlines
Deal found 4/4£489
Mon 20/420:20
IAD
-
STN
2 stops19h 15m
Multiple Airlines
Thu 23/417:25
STN
-
IAD
2 stops28h 35m
Multiple Airlines
Deal found 4/4£490
Sun 26/422:35
IAD
-
LHR
1 stop18h 25m
TAP AIR PORTUGAL
Tue 5/506:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 8/4£490
Sun 26/420:40
IAD
-
LTN
2 stops21h 10m
Multiple Airlines
Tue 5/508:00
LTN
-
IAD
2 stops17h 35m
Multiple Airlines
Deal found 7/4£490
Sun 26/420:20
IAD
-
LHR
2 stops17h 30m
Scandinavian Airlines
Thu 30/406:40
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 4/4£491
Sun 26/422:35
IAD
-
LGW
1 stop30h 10m
TAP AIR PORTUGAL
Tue 5/516:25
LGW
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 8/4£492

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 April 2026.

Round-trip from

£486

One-way from

£218

Popular in

June

Cheapest in

September

Average price

£522

Good round-trip deal

£637 or less

Good one-way deal

£331 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 26/4-6/5
  • 2 total stops
  • 38h 55m total
  • Washington, D.C. to London
Search Deals
20/4
  • 20/4
  • 3 total stops
  • 32h 45m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to London (LON).
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 April 2026.
Use the filters below to find and compare flights from Washington, D.C. to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/10

20:30-14:40

1 stop13h 10m

London Gatwick

Mon 5/10

15:40-19:20

1 stop32h 40m

£568

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 3/9

20:30-14:40

1 stop13h 10m

London Gatwick

Fri 11/9

15:40-22:15

1 stop11h 35m

£578

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 3/9

20:30-14:40

1 stop13h 10m

London Gatwick

Sat 12/9

15:40-22:15

1 stop11h 35m

£578

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Wed 26/8

20:30-11:45

1 stop10h 15m

London Gatwick

Thu 3/9

13:00-19:25

1 stop11h 25m

£578

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 25/4

13:20-09:55

1 stop15h 35m

London Stansted

Wed 6/5

06:55-19:50

1 stop17h 55m

£587

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 18/8

17:05-09:45

1 stop11h 40m

London Gatwick

Thu 27/8

10:35-20:35

1 stop15h 00m

£610

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 20/4

11:00-09:35

2 stops17h 35m

London Heathrow

Mon 11/5

07:05-23:24

2 stops21h 19m

£614

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 2/5

13:20-16:40

1 stop22h 20m

London Stansted

Fri 15/5

10:50-11:35

1 stop29h 45m

£614

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 5/9

21:45-09:55

1 stop31h 10m

London Stansted

Thu 10/9

17:35-11:35

1 stop23h 00m

£622

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 30/9

21:00-06:20

1 stop28h 20m

London Stansted

Mon 5/10

07:25-19:00

1 stop16h 35m

£639

Flights are sorted by cheapest return flights first.

Deals found on 8/4

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington, D.C. to London

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

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

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to London. Price data was last updated on 3 April 2026.

The best time to book flights from Washington, D.C. to London is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £266). Flying from Washington, D.C. to London in June is currently the most expensive (average of £563). 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 WAS to LON?

Find hourly flight availability from Washington, D.C. to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to London as you normally would.

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

Explore weekly flight availability from Washington, D.C. to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 9 April 2026.

The most flights from WAS to LON are scheduled on a Wednesday (30 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 on average).

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

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

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

Dublin (DUB) – chosen by Cheapflights users on 40% of one-stop itineraries from Washington, D.C. to London on Cheapflights.

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

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

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £358.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 25m.

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

Average stopover duration for one-stop one-way flights from Washington, D.C. to London, 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 stopover time of 1h 21m.

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

About 19% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 164 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

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

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

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

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 9 April 2026.
Read reviews from past customers who have flown with KLM,Virgin Atlantic, andUnited Airlines from Washington, D.C. to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,492 reviews
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
685 reviews
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,554 reviews
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,900 reviews
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,864 reviews
KLM
7.7
Good
1,492 reviews
Check prices

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Food

7.3

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to London. 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 Washington, D.C. to London?

    Departing from Washington, D.C. to London will take you 13h 10m. The distance between Washington, D.C. and London is about 3683 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Lufthansa, at £309, was found to be the cheapest airline from Washington, D.C. to London.Alternate airlines flying return to your destination include Icelandair and Virgin Atlantic. These flights start at 44% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £159. However, be on the lookout for offers from JetBlue and Virgin Atlantic, as they are both options that can get you from Washington, D.C. to London for a low price.

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

    The most popular route from Washington, D.C. to London is Washington, D.C. Dulles Intl - London Heathrow. You may also consider Baltimore/Washington - London Heathrow or Washington, D.C. Dulles Intl - London Stansted.

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

    Before booking your flight to London from Washington, D.C., check out the most reliable airlines to get you to your destination on time: United Airlines (89%), Delta (88%), Virgin Atlantic( 88%).

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

    Looking at all options, your cheapest flight can be booked for £276. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £388 on average, our data indicates £526 when flying from Washington, D.C. to London.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington, D.C. to London 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 Washington, D.C. to London?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £266). Flying from Washington, D.C. to London in June is currently the most expensive (average of £563). 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.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Hounslow
Gatwick
Luton
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Chelmsford
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Washington, D.C. to London

Discover the top 6 airlines that operate flights from Washington, D.C. to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£309Average£404FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£368Average£563FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£378Average£569FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£390Average£566FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£490Average£651FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£511Average£719FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington, D.C. to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Washington, D.C. to London.

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

Certainly. Search results for flights to London from Washington, D.C. shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Washington, D.C. today and book when prices fit your budget.

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