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Cheap flights from Washington, D.C. to London from £131

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 20/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
9 nov — 16 nov1
1 adult
1 adult, Economy

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 Tuesday and return on a Wednesday

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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 10 outubro 2025.

seg 3/1119:40IAD - LHR
1 stop18h 50mIcelandair
ter 11/1120:35LHR - IAD
1 stop26h 55mIcelandair
Deal found 9/10£411
qua 12/1109:45IAD - STN
3 stops30h 00mMultiple Airlines
ter 18/1120:10STN - IAD
2 stops24h 40mMultiple Airlines
Deal found 9/10£411
qua 26/1109:45IAD - LGW
2 stops24h 25mMultiple Airlines
seg 1/1210:10LGW - IAD
2 stops35h 30mMultiple Airlines
Deal found 9/10£412
ter 18/1117:30IAD - LGW
1 stop17h 15mTAP AIR PORTUGAL
seg 24/1121:25LGW - IAD
2 stops22h 10mTAP AIR PORTUGAL
Deal found 8/10£413
ter 11/1117:30IAD - STN
2 stops25h 20mMultiple Airlines
seg 17/1112:00STN - IAD
2 stops31h 35mMultiple Airlines
Deal found 9/10£414
dom 16/1122:30IAD - LGW
1 stop30h 20mTAP AIR PORTUGAL
seg 24/1111:00LGW - IAD
2 stops32h 35mTAP AIR PORTUGAL
Deal found 9/10£414
dom 23/1122:55IAD - STN
2 stops18h 40mMultiple Airlines
ter 2/1207:30STN - IAD
2 stops18h 29mMultiple Airlines
Deal found 10/10£415
qui 27/1117:30IAD - LGW
1 stop11h 20mTAP AIR PORTUGAL
qua 3/1209:35LGW - IAD
2 stops16h 25mTAP AIR PORTUGAL
Deal found 9/10£415
seg 1/1219:40IAD - LHR
2 stops19h 15mMultiple Airlines
sex 5/1206:40LHR - IAD
2 stops16h 50mMultiple Airlines
Deal found 10/10£416
dom 9/1109:45IAD - LGW
2 stops22h 35mMultiple Airlines
ter 18/1116:00LGW - IAD
2 stops28h 50mMultiple Airlines
Deal found 9/10£417
ter 18/1112:15DCA - LHR
2 stops22h 45mScandinavian Airlines
seg 24/1106:40LHR - DCA
2 stops21h 16mScandinavian Airlines
Deal found 8/10£417
seg 29/1219:40IAD - LHR
1 stop10h 10mIcelandair
dom 11/120:35LHR - IAD
1 stop26h 55mIcelandair
Deal found 9/10£417

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 10 outubro 2025.

Round-trip from

£405

One-way from

£131

Popular in

June

Cheapest in

September

Average price

£497

Good round-trip deal

£461 or less

Good one-way deal

£282 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/2-21/2
  • 4 total stops
  • 41h 20m total
  • Washington, D.C. to London
Search Deals
20/10
  • 20/10
  • 1 total stop
  • 17h 29m 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 (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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 10 outubro 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

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

qua 28/1

12:30-16:00

2 stops22h 30m

London Heathrow

dom 1/2

21:05-17:15

2 stops25h 10m

£407

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

qua 12/11

09:45-20:45

3 stops30h 00m

London Stansted

ter 18/11

20:10-15:50

2 stops24h 40m

£411

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

dom 16/11

22:30-09:50

1 stop30h 20m

London Gatwick

seg 24/11

11:00-14:35

2 stops32h 35m

£414

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

qui 29/1

12:30-11:00

2 stops17h 30m

London Stansted

qua 4/2

06:00-17:15

1 stop16h 15m

£418

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

ter 25/11

20:30-20:30

2 stops19h 00m

London Stansted

qui 11/12

08:30-20:59

2 stops17h 29m

£419

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 13/3

20:40-10:55

1 stop10h 15m

London Gatwick

ter 17/3

11:55-19:30

1 stop11h 35m

£420

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

qua 14/1

19:40-20:55

2 stops20h 15m

London Stansted

seg 19/1

21:20-18:30

2 stops26h 10m

£420

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

sex 13/3

20:40-10:50

1 stop10h 10m

London Heathrow

ter 17/3

12:15-19:30

1 stop11h 15m

£423

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 13/2

22:30-15:45

1 stop12h 15m

London Gatwick

seg 16/2

21:25-14:35

2 stops22h 10m

£432

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sex 5/12

22:30-15:45

1 stop12h 15m

London Gatwick

sex 12/12

21:25-15:15

2 stops22h 50m

£444

Flights are sorted by cheapest return flights first.

Deals found on 10/10

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 3 October 2025.

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 £562). 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 10 outubro 2025.

It’s optimal to fly from Washington, D.C. to London at midday. By choosing this option you can save up to 9% 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 10 outubro 2025.

The most flights from WAS to LON are scheduled on a Wednesday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

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 61% 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 £329.

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 Philadelphia (PHL) have the shortest average one-way travel time for one-stop routes: 8h 50m.

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 Charlotte (CLT) offer the fastest connection on this route, with an average stopover time of 1h 18m.

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 10 outubro 2025.
Read reviews from past customers who have flown with United Airlines, Virgin Atlantic, 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.
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,972 reviews
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Virgin Atlantic
7.4
Good
665 reviews
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Icelandair
7.0
Good
553 reviews
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Iberia
7.0
Good
2,982 reviews
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
British Airways
6.7
Okay
7,449 reviews
United Airlines
7.4
Good
8,972 reviews
Check prices

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sept 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

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 3683 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 £311, 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 £184. However, be on the lookout for offers from JetBlue and Icelandair, 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: Aeromexico (100%), American Airlines (84%), British Airways( 84%).

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

    Looking at all options, your cheapest flight can be booked for £267. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £319 on average, our data indicates £462 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 £562). 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

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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 Luton flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Reagan-National to Manchester flights
Reagan-National to Stansted flights
Dulles Intl to Birmingham flights
Dulles Intl to Southampton flights
Dulles Intl to Leeds flights
Dulles Intl to Liverpool flights
Dulles Intl to Bristol flights
Dulles Intl to Newcastle upon Tyne 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 10 outubro 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£311Average£528FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£371Average£657FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£385Average£640FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£389Average£584FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£400Average£541FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£433Average£542FlexibilityNo cancel feeOn-time77%
Search Iberia flights
KLMCheapest£509Average£620FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£518Average£725FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£528Average£630FlexibilityNo 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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