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Cheap flights from Washington, D.C. to London from £191

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 18/7. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
21 May — 28 May1
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 52 days in advance, depart on a Tuesday or Wednesday 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 April 2026.

Wed 11/1119:40
BWI
-
LHR
1 stop10h 10m
Icelandair
Sun 15/1112:15
LHR
-
BWI
1 stop11h 25m
Icelandair
Deal found 17/4£500
Wed 11/1119:40
BWI
-
LGW
1 stop10h 15m
Icelandair
Sun 15/1111:55
LGW
-
BWI
1 stop11h 45m
Icelandair
Deal found 17/4£500
Wed 15/709:24
BWI
-
LGW
1 stop19h 36m
Multiple Airlines
Wed 2/914:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 19/4£501
Thu 21/515:45
IAD
-
LHR
1 stop13h 15m
Air Canada
Thu 4/608:30
LHR
-
IAD
1 stop11h 59m
Air Canada
Deal found 16/4£505
Wed 20/515:45
IAD
-
LHR
1 stop13h 15m
Air Canada
Fri 5/609:30
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 16/4£507
Wed 15/718:00
BWI
-
LGW
2 stops15h 40m
Multiple Airlines
Tue 1/914:00
LGW
-
BWI
1 stop24h 06m
Multiple Airlines
Deal found 19/4£507
Tue 19/515:45
IAD
-
LHR
1 stop13h 15m
Air Canada
Tue 2/609:30
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 16/4£507
Fri 8/523:20
IAD
-
STN
2 stops16h 10m
Multiple Airlines
Wed 13/521:30
STN
-
IAD
2 stops28h 05m
Multiple Airlines
Deal found 16/4£508
Sun 17/515:45
IAD
-
LHR
1 stop13h 15m
Air Canada
Tue 2/609:30
LHR
-
IAD
1 stop14h 28m
Air Canada
Deal found 16/4£508
Wed 20/515:45
IAD
-
LHR
1 stop9h 45m
Air Canada
Mon 1/608:30
LHR
-
IAD
1 stop11h 59m
Air Canada
Deal found 16/4£509
Tue 5/520:30
IAD
-
STN
2 stops17h 00m
Multiple Airlines
Tue 2/618:55
STN
-
IAD
2 stops30h 40m
Multiple Airlines
Deal found 16/4£510
Tue 19/515:45
IAD
-
LHR
1 stop9h 45m
Air Canada
Mon 1/608:30
LHR
-
IAD
1 stop11h 59m
Air Canada
Deal found 16/4£510

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 April 2026.

Round-trip from

£501

One-way from

£191

Popular in

June

Cheapest in

September

Average price

£524

Good round-trip deal

£644 or less

Good one-way deal

£379 or less
15/7-2/9
  • 15/7-2/9
  • 2 total stops
  • 43h 42m total
  • Washington, D.C. to London
Search Deals
18/7
  • 18/7
  • 1 total stop
  • 31h 01m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£70 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 April 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 - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/10

21:45-16:50

1 stop38h 05m

London Stansted

Mon 19/10

10:50-19:50

1 stop38h 00m

£568

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Sun 23/8

23:20-11:45

1 stop31h 25m

London Gatwick

Sat 5/9

15:40-19:25

1 stop32h 45m

£580

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Fri 8/5

15:26-10:00

1 stop13h 34m

London Gatwick

Tue 2/6

14:00-19:06

1 stop34h 06m

£616

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 22/9

22:55-11:20

Nonstop7h 25m

London Heathrow

Tue 29/9

06:30-15:35

1 stop14h 05m

£630

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 12/8

18:30-06:55

Nonstop7h 25m

London Heathrow

Wed 19/8

06:50-13:30

1 stop11h 40m

£631

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 2/9

08:15-08:35

1 stop19h 20m

London Heathrow

Mon 28/9

12:10-16:45

1 stop33h 35m

£631

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Fri 8/5

13:43-10:00

1 stop15h 17m

London Gatwick

Wed 27/5

14:00-12:38

1 stop27h 38m

£638

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Wed 6/5

17:33-16:00

2 stops17h 27m

London Gatwick

Fri 15/5

10:25-20:50

2 stops15h 25m

£650

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Sun 3/5

20:30-14:40

1 stop13h 10m

London Gatwick

Thu 7/5

13:00-19:25

1 stop11h 25m

£652
Fastest return journey

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 3/5

22:55-11:20

Nonstop7h 25m

London Heathrow

Tue 12/5

17:55-20:55

Nonstop8h 00m

£652

Flights are sorted by cheapest return flights first.

Deals found on 20/4

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

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 17 April 2026.

The best time to book flights from Washington, D.C. to London is 52 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, October is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £456). Flying from Washington, D.C. to London in December is currently the most expensive (average of £769). 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 April 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 April 2026.

The most flights from WAS to LON are scheduled on a Monday (30 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 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 41% 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 £356.

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 20% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 167 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?

Tuesday 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.

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 April 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
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,501 reviews
KLM
7.8
Good
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
687 reviews
KLM
7.8
Good
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,611 reviews
KLM
7.8
Good
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,935 reviews
KLM
7.8
Good
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,896 reviews
KLM
7.8
Good
1,501 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 £307, 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 44% 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 £158. 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. 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: United Airlines (89%), Delta (85%), Virgin Atlantic( 85%).

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

    Looking at all options, your cheapest flight can be booked for £329. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £526 on average, our data indicates £751 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, October is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £456). Flying from Washington, D.C. to London in December is currently the most expensive (average of £769). 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
Wembley
Croydon
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

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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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£307Average£401FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£365Average£559FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£375Average£565FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£387Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£487Average£655FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£507Average£714FlexibilityNo 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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