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Cheap flights from Washington, D.C. to London from £162

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
7 Feb — 14 Feb1
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 Wednesday or Sunday and return on a Thursday

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 8 January 2026.

Round-trip from

£384

One-way from

£162

Popular in

June

Cheapest in

September

Average price

£478

Good round-trip deal

£448 or less

Good one-way deal

£335 or less
Icelandair
  • Icelandair
  • 14/4-23/4
  • 2 total stops
  • 21h 45m total
  • Washington, D.C. to London
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25/3
  • 25/3
  • 1 total stop
  • 19h 03m 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 January 2026
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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).
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Find 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 8 January 2026.

Tue 14/420:30BWI - LHR
1 stop10h 25mIcelandair
Fri 24/413:05LHR - BWI
1 stop11h 20mIcelandair
Deal found 6/1£384
Wed 15/420:30BWI - LGW
1 stop13h 10mIcelandair
Wed 22/415:40LGW - BWI
1 stop32h 45mIcelandair
Deal found 6/1£384
Mon 6/420:30BWI - LHR
1 stop10h 25mIcelandair
Sat 11/413:05LHR - BWI
1 stop14h 25mIcelandair
Deal found 6/1£385
Thu 29/113:22BWI - LGW
1 stop15h 38mMultiple Airlines
Thu 5/214:00LGW - BWI
2 stops25h 27mMultiple Airlines
Deal found 6/1£385
Fri 23/119:40BWI - LGW
1 stop10h 15mIcelandair
Sun 1/211:55LGW - BWI
1 stop11h 45mIcelandair
Deal found 6/1£385
Tue 21/420:30BWI - LHR
1 stop18h 50mIcelandair
Sat 2/513:05LHR - BWI
1 stop14h 25mIcelandair
Deal found 6/1£386
Fri 30/116:01BWI - LGW
1 stop12h 59mMultiple Airlines
Mon 2/214:00LGW - BWI
1 stop32h 10mMultiple Airlines
Deal found 5/1£386
Thu 16/423:35BWI - LGW
1 stop10h 05mIcelandair
Sat 2/513:00LGW - BWI
1 stop14h 30mIcelandair
Deal found 6/1£387
Fri 23/119:40BWI - LHR
1 stop18h 50mIcelandair
Sun 1/212:15LHR - BWI
1 stop11h 25mIcelandair
Deal found 6/1£388
Tue 21/420:30BWI - LGW
1 stop13h 10mIcelandair
Sun 3/513:00LGW - BWI
1 stop11h 25mIcelandair
Deal found 6/1£388
Sun 18/119:40BWI - LGW
1 stop10h 15mIcelandair
Mon 26/111:55LGW - BWI
1 stop11h 45mIcelandair
Deal found 6/1£388
Sun 18/119:40BWI - LHR
1 stop18h 50mIcelandair
Tue 27/112:15LHR - BWI
1 stop11h 25mIcelandair
Deal found 6/1£389

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 8 January 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

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Fri 23/1

19:40-10:55

1 stop10h 15m

London Gatwick

Sun 1/2

11:55-18:40

1 stop11h 45m

£385

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Fri 17/4

20:30-11:55

1 stop10h 25m

London Heathrow

Wed 17/6

13:05-19:25

1 stop11h 20m

£421

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Mon 13/4

20:30-11:55

1 stop10h 25m

London Heathrow

Thu 18/6

13:05-19:25

1 stop11h 20m

£421

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 18/1

17:05-15:35

1 stop17h 30m

London Heathrow

Tue 27/1

08:50-15:35

1 stop11h 45m

£424

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 10/2

21:45-10:00

Nonstop7h 15m

London Heathrow

Mon 16/2

16:20-15:35

1 stop28h 15m

£425

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 23/2

20:30-15:45

1 stop14h 15m

London Stansted

Mon 2/3

07:35-17:15

1 stop14h 40m

£430

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 18/4

20:30-11:55

1 stop10h 25m

London Heathrow

Wed 17/6

13:05-19:20

1 stop11h 15m

£430

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 18/1

19:40-15:10

2 stops14h 30m

London Stansted

Mon 26/1

06:00-18:30

2 stops17h 30m

£434

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 21/2

20:30-23:25

2 stops21h 55m

London Stansted

Sat 28/2

06:45-18:50

2 stops17h 05m

£434

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Mon 26/1

17:18-07:10

2 stops32h 52m

London Heathrow

Mon 2/2

13:45-14:11

2 stops53h 26m

£436

Flights are sorted by cheapest return flights first.

Deals found on 7/1

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 2 January 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 £23). Flying from Washington, D.C. to London in June is currently the most expensive (average of £529). 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 8 January 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 8 January 2026.

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 (18 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 44% 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 £326.

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 25m.

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 159 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 Saturday 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 8 January 2026.
Read reviews from past customers who have flown with Finnair, 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.
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Finnair
7.6
Good
1,346 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Virgin Atlantic
7.5
Good
678 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
United Airlines
7.4
Good
9,142 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Iberia
7.0
Good
3,079 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
British Airways
6.7
Okay
7,659 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Overall

7.6

Comfort

7.4

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.

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 £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 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 £286. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £308 on average, our data indicates £501 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 £23). Flying from Washington, D.C. to London in June is currently the most expensive (average of £529). 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
Slough
Hounslow
Gatwick
Ilford
Wembley
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Bedford
Chelmsford
Eastbourne
Romford
Folkestone
Ipswich

Browse thousands of different options on Cheapflights for your next trip

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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 Edinburgh flights
Dulles Intl to Luton flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Reagan-National to Manchester flights
Reagan-National to Luton flights
Reagan-National to Stansted flights
Dulles Intl to Southampton flights
Dulles Intl to Leeds flights
Dulles Intl to Liverpool flights
Dulles Intl to Birmingham flights
Dulles Intl to Newcastle upon Tyne flights
Dulles Intl to Bristol flights
Reagan-National to Bristol flights
Dulles Intl to Exeter flights
Dulles Intl to East Midlands flights
Dulles Intl to Bournemouth flights

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 8 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£308Average£491FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£367Average£537FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£381Average£598FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£385Average£564FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£396Average£550FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£457Average£516FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£492Average£624FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£510Average£718FlexibilityNo 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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