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Cheap flights from Washington, D.C. to London from £161

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 20/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
22 Mar — 29 Mar1
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 47 days in advance, depart on a Sunday or Wednesday 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 20 February 2026.

Sat 2/520:30
IAD
-
LHR
1 stop18h 50m
Icelandair
Sat 9/521:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£405
Thu 2/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 7/421:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£406
Thu 1/1020:30
IAD
-
LHR
1 stop18h 50m
Icelandair
Sat 10/1021:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£407
Mon 5/1020:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Tue 20/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Deal found 16/2£408
Tue 6/1020:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Fri 16/1021:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£408
Mon 13/420:30
IAD
-
STN
2 stops22h 50m
Multiple Airlines
Mon 27/422:45
STN
-
IAD
2 stops26h 44m
Multiple Airlines
Deal found 16/2£408
Mon 5/1020:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 20/1021:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£408
Wed 15/420:30
IAD
-
STN
2 stops15h 40m
Multiple Airlines
Mon 20/408:15
STN
-
IAD
2 stops16h 05m
Multiple Airlines
Deal found 16/2£409
Tue 6/1020:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Mon 19/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Deal found 16/2£409
Sat 12/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Sat 17/1021:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 16/2£409
Tue 28/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Thu 28/513:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 16/2£410
Tue 28/420:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Thu 28/513:00
LGW
-
IAD
1 stop11h 20m
Icelandair
Deal found 16/2£411

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 20 February 2026.

Round-trip from

£405

One-way from

£161

Popular in

June

Cheapest in

September

Average price

£478

Good round-trip deal

£441 or less

Good one-way deal

£295 or less
Icelandair
  • Icelandair
  • 2/5-9/5
  • 2 total stops
  • 45h 45m total
  • Washington, D.C. to London
Search Deals
20/3
  • 20/3
  • 1 total stop
  • 32h 05m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 20 February 2026.
Use the filters below to find and compare flights from Washington, D.C. to London that are best for you.

Fly from

Washington, D.C.

Fly to

London

Route

Depart

Return

Price

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 16/8

23:20-11:45

1 stop31h 25m

London Gatwick

Sun 23/8

15:40-22:15

1 stop11h 35m

£418

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Wed 18/3

20:40-21:50

2 stops21h 10m

London Luton

Mon 30/3

09:55-19:25

2 stops14h 30m

£439

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 9/3

19:20-06:40

Nonstop7h 20m

London Heathrow

Tue 17/3

06:50-15:35

1 stop12h 45m

£458

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 4/5

20:30-15:45

2 stops14h 15m

London Luton

Wed 13/5

06:15-19:20

2 stops18h 05m

£458

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 19/3

23:20-10:40

Nonstop7h 20m

London Heathrow

Thu 26/3

10:00-17:05

1 stop11h 05m

£460

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/3

23:20-10:40

Nonstop7h 20m

London Heathrow

Tue 24/3

10:00-17:05

1 stop11h 05m

£460

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 3/3

09:45-07:10

1 stop16h 25m

London Heathrow

Fri 20/3

09:00-17:40

1 stop12h 40m

£462

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 9/4

20:20-19:55

2 stops18h 35m

London Heathrow

Tue 14/4

19:50-17:00

2 stops26h 10m

£465

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 5/3

09:00-18:40

3 stops28h 40m

London Stansted

Fri 13/3

07:30-20:54

2 stops17h 24m

£465

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 15/4

20:20-14:05

1 stop12h 45m

London Stansted

Mon 20/4

08:15-17:00

1 stop13h 45m

£470

Flights are sorted by cheapest return flights first.

Deals found on 18/2

Showing 1-10 of 60 results
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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 20 February 2026.

The best time to book flights from Washington, D.C. to London is 47 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 £64). Flying from Washington, D.C. to London in June is currently the most expensive (average of £524). 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 20 February 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 20 February 2026.

The most flights from WAS to LON are scheduled on a Tuesday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 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 36% 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.

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £400.

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 Thursday 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 20 February 2026.
Read reviews from past customers who have flown with Virgin Atlantic, United Airlines, andIberia 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.
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
679 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,331 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
3,118 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,795 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,757 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Overall

7.5

Comfort

7.3

Crew

8.2

Entertainment

7.6

Food

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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 20m. 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 £308, was found to be the cheapest airline from Washington, D.C. to London.Alternate airlines flying return to your destination include Virgin Atlantic and British Airways. These flights start at 43% 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 Virgin Atlantic and British Airways, 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 Gatwick.

  • 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: KLM (85%), Air France (85%), Delta( 85%).

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

    Looking at all options, your cheapest flight can be booked for £269. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £328 on average, our data indicates £420 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 £64). Flying from Washington, D.C. to London in June is currently the most expensive (average of £524). 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
Luton
Croydon
Wembley
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
Bedford
Crawley
Romford

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 8 airlines flying from Washington, D.C. to London

Discover the top 8 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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£308Average£490FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£376Average£507FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£380Average£589FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£384Average£546FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£395Average£552FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£456Average£557FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£492Average£622FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£509Average£717FlexibilityNo 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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