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Cheap flights from Washington, D.C. to London from £159

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 29/7. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
4 Jul — 11 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in January or February, booked 52 days in advance, depart on a Tuesday or Monday and return on a Thursday

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 4 June 2026.

Thu 15/1020:30
BWI
-
LHR
1 stop10h 25m
Multiple Airlines
Sat 24/1016:25
LHR
-
BWI
Nonstop8h 15m
Multiple Airlines
Deal found 3/6£631
Wed 29/715:21
BWI
-
LGW
1 stop13h 39m
Multiple Airlines
Wed 12/814:00
LGW
-
BWI
1 stop15h 23m
Multiple Airlines
Deal found 3/6£631
Mon 10/820:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Wed 19/813:05
LHR
-
BWI
1 stop14h 10m
Icelandair
Deal found 31/5£632
Sat 8/815:21
BWI
-
LGW
1 stop13h 39m
Multiple Airlines
Mon 17/814:00
LGW
-
BWI
1 stop15h 23m
Multiple Airlines
Deal found 31/5£632
Thu 20/823:20
BWI
-
LHR
1 stop16h 00m
Icelandair
Mon 24/813:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 31/5£632
Mon 10/823:20
BWI
-
LGW
1 stop10h 20m
Icelandair
Wed 19/815:40
LGW
-
BWI
1 stop11h 35m
Icelandair
Deal found 1/6£632
Sun 16/823:20
BWI
-
LHR
1 stop31h 35m
Icelandair
Mon 24/813:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 31/5£633
Wed 19/815:09
BWI
-
LGW
1 stop13h 51m
Multiple Airlines
Sun 23/814:00
LGW
-
BWI
2 stops29h 14m
Multiple Airlines
Deal found 3/6£633
Mon 6/715:21
BWI
-
LGW
1 stop13h 39m
Multiple Airlines
Wed 19/814:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 31/5£634
Wed 7/1020:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Sat 24/1021:25
LHR
-
BWI
1 stop27h 15m
Icelandair
Deal found 31/5£635
Thu 10/923:20
BWI
-
LGW
1 stop10h 20m
Icelandair
Sun 20/915:40
LGW
-
BWI
1 stop11h 35m
Icelandair
Deal found 2/6£635
Wed 19/820:30
BWI
-
LHR
1 stop18h 50m
Icelandair
Mon 24/813:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 4/6£635

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 4 June 2026.

Round-trip from

£631

One-way from

£159

Popular in

June

Cheapest in

January

Average price

£834

Good round-trip deal

£759 or less

Good one-way deal

£364 or less
Finnair
  • Finnair
  • 15/10-24/10
  • 1 total stop
  • 18h 40m total
  • Washington, D.C. to London
Search Deals
29/7
  • 29/7
  • 1 total stop
  • 22h 55m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£98 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 4 June 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

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 19/8

14:18-11:20

1 stop16h 02m

London Heathrow

Tue 25/8

06:15-17:51

2 stops16h 36m

£650

Washington, D.C.London

DCA - STN

DCASTN

Washington, D.C. Reagan-National

Mon 15/6

14:59-21:20

2 stops25h 21m

London Stansted

Thu 25/6

06:30-12:00

3 stops34h 30m

£664

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 17/9

21:45-16:50

1 stop38h 05m

London Stansted

Mon 28/9

10:50-11:35

1 stop29h 45m

£665

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 1/9

15:11-06:55

1 stop10h 44m

London Heathrow

Tue 20/10

16:35-22:57

1 stop11h 22m

£665

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 1/9

21:05-12:40

1 stop10h 35m

London Heathrow

Mon 7/9

09:50-15:45

1 stop10h 55m

£665

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 9/10

21:45-09:55

1 stop31h 10m

London Stansted

Tue 20/10

06:55-11:35

1 stop33h 40m

£665

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 18/9

13:20-16:50

1 stop22h 30m

London Stansted

Tue 22/9

17:35-19:50

1 stop31h 15m

£665

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 12/8

18:27-09:15

1 stop9h 48m

London Heathrow

Fri 21/8

13:25-21:27

1 stop13h 02m

£666

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mon 28/9

15:25-08:40

1 stop12h 15m

London City

Thu 8/10

09:15-16:05

1 stop11h 50m

£671

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 26/8

15:25-08:40

1 stop12h 15m

London City

Tue 8/9

09:15-16:05

1 stop11h 50m

£671

Flights are sorted by cheapest return flights first.

Deals found on 3/6

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

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

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £498). Flying from Washington, D.C. to London in June is currently the most expensive (average of £975). 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 4 June 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 4 June 2026.

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

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 46% 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 38m.

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 Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 30m.

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 168 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 morning 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, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.

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

The best time to book flights from Washington, D.C. to London is 68 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.

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 4 June 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
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,524 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.5
Good
689 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,772 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Aer Lingus
7.3
Good
1,594 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,023 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 10h 44m. The distance between Washington, D.C. and London is about 3652 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 £308, 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 46% 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. Reagan-National - London Heathrow.

  • 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: Aer Lingus (82%), Finnair (82%), Iberia( 82%).

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

    Looking at all options, your cheapest flight can be booked for £334. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £456 on average, our data indicates £1,022 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, August is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £498). Flying from Washington, D.C. to London in June is currently the most expensive (average of £975). 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
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Kingston upon Thames
Eastbourne
Watford
Ipswich
Romford
Guildford
Borehamwood
Folkestone
Southall

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Washington, D.C. to London

Discover the top 5 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 4 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£308Average£404FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£367Average£679FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£377Average£568FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£385Average£576FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£490Average£659FlexibilityNo cancel feeOn-time69%
Search United 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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