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Cheap flights from Washington, D.C. to London from £142

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
21 Dec — 28 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in September or October, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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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 November 2025.

Tue 30/1221:45IAD - LHR
Nonstop7h 15mBritish Airways
Tue 13/112:10LHR - IAD
Nonstop8h 25mBritish Airways
Deal found 19/11£444
Thu 27/1119:40IAD - LHR
1 stop18h 50mIcelandair
Wed 3/1220:35LHR - IAD
1 stop26h 55mIcelandair
Deal found 20/11£445
Wed 26/1109:00IAD - STN
3 stops32h 40mMultiple Airlines
Wed 3/1208:05STN - IAD
2 stops17h 00mMultiple Airlines
Deal found 19/11£446
Tue 9/1217:30IAD - LGW
1 stop11h 20mTAP AIR PORTUGAL
Mon 15/1216:35LGW - IAD
1 stop27h 00mTAP AIR PORTUGAL
Deal found 19/11£446
Tue 2/1219:40BWI - LGW
1 stop10h 15mIcelandair
Mon 15/1211:55LGW - BWI
1 stop11h 45mIcelandair
Deal found 19/11£447
Thu 4/1217:30IAD - LGW
1 stop17h 20mTAP AIR PORTUGAL
Wed 10/1210:40LGW - IAD
1 stop15h 20mTAP AIR PORTUGAL
Deal found 19/11£448
Wed 3/1219:40BWI - LHR
1 stop10h 10mIcelandair
Tue 6/120:35LHR - BWI
1 stop27h 05mIcelandair
Deal found 19/11£448
Sun 7/1222:30IAD - LHR
1 stop14h 00mTAP AIR PORTUGAL
Tue 23/1218:30LHR - IAD
1 stop31h 30mTAP AIR PORTUGAL
Deal found 19/11£448
Wed 26/1116:10DCA - LGW
2 stops17h 05mMultiple Airlines
Tue 2/1216:00LGW - DCA
3 stops32h 45mMultiple Airlines
Deal found 18/11£448
Thu 4/1219:40BWI - LGW
1 stop10h 15mIcelandair
Fri 12/1211:55LGW - BWI
1 stop11h 45mIcelandair
Deal found 19/11£448
Sun 7/1219:40IAD - LHR
1 stop10h 10mIcelandair
Wed 7/120:35LHR - IAD
1 stop26h 55mIcelandair
Deal found 19/11£449
Tue 9/1219:40BWI - LGW
1 stop10h 15mIcelandair
Tue 16/1211:55LGW - BWI
1 stop11h 45mIcelandair
Deal found 19/11£449

Cheap 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 November 2025.

Round-trip from

£443

One-way from

£142

Popular in

December

Cheapest in

September

Average price

£594

Good round-trip deal

£485 or less

Good one-way deal

£294 or less
16/2-23/2
  • 16/2-23/2
  • 2 total stops
  • 28h 55m total
  • Washington, D.C. to London
Search Deals
26/1
  • 26/1
  • 2 total stops
  • 37h 36m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£32 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 November 2025.
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

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 20/4

11:00-09:35

2 stops17h 35m

London Heathrow

Mon 27/4

19:50-23:12

2 stops32h 22m

£446

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 20/2

19:40-10:55

1 stop10h 15m

London Gatwick

Tue 24/2

11:55-18:30

1 stop11h 35m

£451

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Tue 31/3

10:57-10:00

1 stop18h 03m

London Gatwick

Tue 7/4

14:00-23:59

1 stop14h 59m

£456

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Wed 7/1

19:40-20:05

2 stops19h 25m

London Luton

Wed 14/1

07:00-18:40

2 stops16h 40m

£458

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 17/1

11:10-09:20

2 stops17h 10m

London Heathrow

Mon 26/1

19:30-19:52

2 stops29h 22m

£458

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 17/1

12:23-09:20

2 stops15h 57m

London Heathrow

Mon 26/1

06:40-19:09

2 stops17h 29m

£458

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 1/4

21:30-09:50

Nonstop7h 20m

London Heathrow

Wed 29/4

16:25-19:40

Nonstop8h 15m

£463

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Fri 30/1

19:40-21:55

2 stops21h 15m

London Luton

Sun 8/2

07:00-18:40

2 stops16h 40m

£465

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 13/2

22:15-10:50

Nonstop7h 35m

London Heathrow

Mon 16/2

06:50-14:35

1 stop12h 45m

£467

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 30/1

22:15-10:50

Nonstop7h 35m

London Heathrow

Fri 6/2

13:45-16:40

1 stop31h 55m

£467

Flights are sorted by cheapest return flights first.

Deals found on 20/11

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 14 November 2025.

The best time to book flights from Washington, D.C. to London is 70 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 £24). Flying from Washington, D.C. to London in June is currently the most expensive (average of £569). 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 November 2025.

It’s optimal to fly from Washington, D.C. to London in the evening. By choosing this option you can save up to 8% on the cost of your flight, compared to a flight in the afternoon.

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 November 2025.

The most flights from WAS to LON are scheduled on a Wednesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 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.

Reykjavik (KEF) – chosen by Cheapflights users on 60% 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 £336.

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 40m.

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 30m.

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

About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 158 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening 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 16% 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 21 November 2025.
Read reviews from past customers who have flown with Virgin Atlantic, United Airlines, andIcelandair 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
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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
674 reviews
Virgin Atlantic
7.5
Good
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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
9,029 reviews
Virgin Atlantic
7.5
Good
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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!
Icelandair
7.0
Good
581 reviews
Virgin Atlantic
7.5
Good
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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
3,027 reviews
Virgin Atlantic
7.5
Good
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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
7,533 reviews
Virgin Atlantic
7.5
Good
674 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Food

6.9

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 3622 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 £317, 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 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 JetBlue, with whom users have recently found tickets for as low as £234. However, be on the lookout for offers from Icelandair and Iberia, 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 (86%), Aer Lingus (82%), American Airlines( 82%).

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

    Looking at all options, your cheapest flight can be booked for £278. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £307 on average, our data indicates £466 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 £24). Flying from Washington, D.C. to London in June is currently the most expensive (average of £569). 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
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Alternative routes for Washington, D.C. to London

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Reagan-National to Gatwick flights
Dulles Intl to Luton flights
Dulles Intl to Edinburgh flights
Reagan-National to Edinburgh flights
Reagan-National to Luton flights
Dulles Intl to Manchester flights
Reagan-National to Manchester flights
Reagan-National to Stansted flights
Dulles Intl to Newcastle upon Tyne flights
Dulles Intl to Birmingham flights
Dulles Intl to Leeds flights
Dulles Intl to Southampton flights
Dulles Intl to Bristol flights
Dulles Intl to Liverpool flights
Reagan-National to Bristol flights
Dulles Intl to Exeter flights
Dulles Intl to East Midlands flights
Dulles Intl to Bournemouth flights

Top 9 airlines flying from Washington, D.C. to London

Discover the top 9 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 November 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£317Average£548FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£367Average£666FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£392Average£650FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£396Average£601FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£407Average£540FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£470Average£531FlexibilityNo cancel feeOn-time77%
Search Iberia flights
KLMCheapest£518Average£665FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£525Average£738FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£537Average£642FlexibilityNo 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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