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Cheap flights from Washington, D.C. to London from £164

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
6 Sep — 13 Sep1
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 39 days in advance, depart on a Tuesday or Monday and return on a Friday

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 7 August 2026.

Mon 21/922:35 -
1 stop12h 00m
Tue 29/916:25 -
1 stop27h 45m
Deal found 2/8£459
Tue 6/1022:35 -
1 stop12h 00m
Thu 15/1010:35 -
1 stop15h 00m
Deal found 2/8£461
Mon 21/917:40 -
2 stops15h 25m
Tue 29/913:40 -
2 stops35h 55m
Deal found 2/8£461
Wed 11/1120:30 -
2 stops17h 05m
Sat 14/1107:55 -
2 stops15h 55m
Deal found 2/8£462
Mon 24/812:00 -
2 stops17h 00m
Fri 11/914:00 -
1 stop25h 17m
Deal found 3/8£462
Tue 29/922:35 -
1 stop18h 25m
Thu 8/1016:35 -
1 stop26h 50m
Deal found 3/8£462
Fri 16/1022:50 -
1 stop11h 50m
Tue 20/1016:25 -
1 stop27h 45m
Deal found 2/8£462
Mon 21/920:20 -
2 stops17h 55m
Tue 29/913:10 -
2 stops32h 50m
Deal found 3/8£463
Mon 21/917:40 -
1 stop11h 40m
Wed 7/1008:00 -
1 stop17h 35m
Deal found 2/8£463
Mon 7/920:20 -
3 stops33h 00m
Wed 16/911:00 -
3 stops35h 00m
Deal found 6/8£464
Mon 21/917:40 -
1 stop11h 40m
Tue 13/1006:00 -
1 stop14h 10m
Deal found 6/8£464
Thu 5/1120:30 -
2 stops14h 50m
Tue 10/1113:00 -
2 stops33h 15m
Deal found 2/8£465

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 7 August 2026.

Round-trip from

£459

One-way from

£164

Popular in

June

Cheapest in

January

Average price

£641

Good round-trip deal

£662 or less

Good one-way deal

£348 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 21/9-29/9
  • 2 total stops
  • 39h 45m total
  • Washington, D.C. to London
Search Deals
17/10
  • 17/10
  • 1 total stop
  • 31h 08m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£120 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 7 August 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 Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 14/10

17:45-22:55

1 stop24h 10m

London Heathrow

Sun 18/10

19:50-15:10

1 stop24h 20m

£479

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Tue 1/12

17:25-20:50

2 stops22h 25m

London Luton

Wed 9/12

07:45-20:35

2 stops17h 50m

£499

BaltimoreLondon

BWI Baltimore/Washington - LGW London Gatwick

BWILGW

Baltimore/Washington

Thu 3/12

19:40-10:55

1 stop10h 15m

London Gatwick

Wed 9/12

11:55-18:40

1 stop11h 45m

£511

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Sat 28/11

19:40-10:50

1 stop10h 10m

London Heathrow

Sat 5/12

12:15-18:40

1 stop11h 25m

£512

BaltimoreLondon

BWI Baltimore/Washington - LGW London Gatwick

BWILGW

Baltimore/Washington

Mon 21/9

20:30-14:40

1 stop13h 10m

London Gatwick

Sat 3/10

15:40-22:15

1 stop11h 35m

£517

BaltimoreLondon

BWI Baltimore/Washington - LGW London Gatwick

BWILGW

Baltimore/Washington

Mon 21/9

20:30-14:40

1 stop13h 10m

London Gatwick

Sun 4/10

15:40-19:25

1 stop32h 45m

£519

BaltimoreLondon

BWI Baltimore/Washington - LGW London Gatwick

BWILGW

Baltimore/Washington

Thu 10/9

21:32-10:00

1 stop31h 28m

London Gatwick

Mon 21/9

14:00-08:31

1 stop23h 31m

£526

BaltimoreLondon

BWI Baltimore/Washington - LTN London Luton

BWILTN

Baltimore/Washington

Thu 19/11

19:40-13:00

1 stop12h 20m

London Luton

Sun 22/11

06:00-18:40

1 stop17h 40m

£537

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Thu 22/10

20:30-20:30

3 stops19h 00m

London Luton

Sun 25/10

07:45-20:05

2 stops16h 20m

£548

Washington, D.C.London

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

IADLGW

Washington, D.C. Dulles Intl

Sun 18/10

22:35-20:25

2 stops40h 50m

London Gatwick

Sun 8/11

10:40-20:35

1 stop14h 55m

£550

Flights are sorted by cheapest return flights first.

Deals found on 7/8

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, February is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £494). Flying from Washington, D.C. to London in June is currently the most expensive (average of £937). 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 7 August 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 7 August 2026.

The most flights from WAS to LON 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 (21 on average).

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

Airfare is below average for this route at the moment.
Washington, D.C. to London flights typically cost between £523 and £746 in September.
The cheapest return price found within the last 5 days was £459 on TAP AIR PORTUGAL (21 Sept–29 Sept).

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 47% 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 £357.

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 42m.

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 28m.

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

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 183 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?

Saturday tends to have the lowest number of delays on this route, whereas Wednesday 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 13% 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 73 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 7 August 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
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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
1,553 reviews
KLM
7.8
Good
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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
694 reviews
KLM
7.8
Good
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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
10,086 reviews
KLM
7.8
Good
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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
TAP AIR PORTUGAL
7.2
Good
2,358 reviews
KLM
7.8
Good
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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
8,153 reviews
KLM
7.8
Good
1,553 reviews
Check prices

Crew

8.4

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

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 15m. The distance between Washington, D.C. and London is about 3641 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 £300, was found to be the cheapest airline from Washington, D.C. to London.Alternate airlines flying return to your destination include Icelandair and British Airways. These flights start at 51% 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 JetBlue, with whom users have recently found tickets for as low as £227. However, be on the lookout for offers from British Airways 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: Finnair (79%), KLM (71%), Air France( 71%).

  • 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 £451 on average, our data indicates £553 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, February is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £494). Flying from Washington, D.C. to London in June is currently the most expensive (average of £937). 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
Gatwick
Luton
Wembley
Slough
Ilford
Hayes
Croydon
Colchester
Eastbourne
Brentford
Watford
Southend-on-Sea
Enfield
Kingston upon Thames
Southall
Dover
Romford
Borehamwood

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 7 August 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£300Average£573FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£367Average£613FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£419Average£590FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£424Average£589FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£491Average£713FlexibilityNo 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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