Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Washington, D.C. to London from £168

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 20/7. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
20 Jun — 27 Jun1
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 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 21 May 2026.

Wed 19/820:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Mon 24/813:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 18/5£614
Thu 10/923:20
BWI
-
LGW
1 stop10h 20m
Multiple Airlines
Mon 14/914:00
LGW
-
BWI
1 stop24h 28m
Multiple Airlines
Deal found 16/5£618
Tue 11/820:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Wed 19/813:05
LHR
-
BWI
1 stop14h 10m
Icelandair
Deal found 16/5£619
Wed 19/823:20
BWI
-
LGW
2 stops14h 05m
Multiple Airlines
Thu 27/814:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 16/5£620
Thu 13/823:20
BWI
-
LGW
2 stops14h 55m
Multiple Airlines
Sat 29/814:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 16/5£621
Tue 4/819:27
BWI
-
LGW
1 stop33h 33m
Multiple Airlines
Wed 19/814:00
LGW
-
BWI
2 stops30h 33m
Multiple Airlines
Deal found 18/5£622
Thu 23/723:20
BWI
-
LGW
1 stop10h 20m
Icelandair
Wed 12/815:40
LGW
-
BWI
1 stop11h 35m
Icelandair
Deal found 16/5£623
Wed 7/1020:30
BWI
-
LGW
1 stop13h 10m
Icelandair
Wed 14/1015:40
LGW
-
BWI
1 stop32h 45m
Icelandair
Deal found 16/5£623
Tue 6/1023:20
BWI
-
LGW
1 stop10h 20m
Icelandair
Wed 14/1015:40
LGW
-
BWI
1 stop32h 45m
Icelandair
Deal found 16/5£624
Wed 5/821:28
BWI
-
LGW
1 stop31h 32m
Multiple Airlines
Wed 19/814:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 18/5£625
Thu 1/1020:20
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Sun 11/1010:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 18/5£626
Sun 31/506:00
DCA
-
STN
3 stops34h 55m
Multiple Airlines
Sat 6/606:35
STN
-
DCA
2 stops16h 38m
Multiple Airlines
Deal found 16/5£626

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 21 May 2026.

Round-trip from

£614

One-way from

£168

Popular in

June

Cheapest in

January

Average price

£659

Good round-trip deal

£759 or less

Good one-way deal

£368 or less
Icelandair
  • Icelandair
  • 19/8-24/8
  • 2 total stops
  • 21h 45m total
  • Washington, D.C. to London
Search Deals
20/7
  • 20/7
  • 1 total stop
  • 31h 22m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£91 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 May 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 21 May 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 - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 9/9

22:55-11:20

Nonstop7h 25m

London Heathrow

Wed 23/9

09:55-15:35

1 stop10h 40m

£635

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 6/10

13:20-09:55

1 stop15h 35m

London Stansted

Tue 13/10

17:35-19:50

1 stop31h 15m

£637

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 28/10

18:10-11:40

1 stop13h 30m

London Heathrow

Wed 11/11

11:45-22:55

2 stops16h 10m

£646

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 29/9

18:15-16:00

1 stop16h 45m

London Gatwick

Tue 6/10

10:35-23:02

2 stops17h 27m

£652

Washington, D.C.London

DCA - STN

DCASTN

Washington, D.C. Reagan-National

Wed 15/7

06:00-22:50

3 stops35h 50m

London Stansted

Mon 20/7

22:25-22:31

2 stops29h 06m

£652

Washington, D.C.London

DCA - STN

DCASTN

Washington, D.C. Reagan-National

Sun 12/7

18:55-15:20

2 stops15h 25m

London Stansted

Tue 21/7

08:10-21:48

3 stops18h 38m

£655

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Thu 17/9

09:00-18:30

2 stops28h 30m

London Heathrow

Tue 22/9

06:40-22:13

2 stops20h 33m

£656
Fastest return journey

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 16/9

22:25-10:50

Nonstop7h 25m

London Heathrow

Thu 24/9

17:05-20:20

Nonstop8h 15m

£657

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 26/8

18:10-09:30

1 stop10h 20m

London City

Wed 16/9

09:20-15:35

1 stop11h 15m

£658

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 28/10

19:20-09:30

1 stop10h 10m

London City

Wed 4/11

09:20-15:55

1 stop11h 35m

£658

Flights are sorted by cheapest return flights first.

Deals found on 19/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 £493). Flying from Washington, D.C. to London in June is currently the most expensive (average of £901). 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 21 May 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 21 May 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 45% 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 170 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, Virgin Atlantic 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 72 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 21 May 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
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

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
1,518 reviews
KLM
7.8
Good
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

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
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

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
9,746 reviews
KLM
7.8
Good
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,018 reviews
KLM
7.8
Good
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

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
7,991 reviews
KLM
7.8
Good
1,518 reviews
Check prices

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

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 7h 25m. The distance between Washington, D.C. and London is about 3664 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 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: United Airlines (86%), Aer Lingus (83%), Finnair( 83%).

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

    Looking at all options, your cheapest flight can be booked for £365. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £459 on average, our data indicates £854 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 £493). Flying from Washington, D.C. to London in June is currently the most expensive (average of £901). 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
Hounslow
Croydon
Wembley
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Southall
Chelmsford

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 21 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£309Average£405FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£368Average£649FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£378Average£570FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£386Average£575FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£491Average£660FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£511Average£720FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.