What are the cheapest airlines flying from Washington, D.C. to London round-trip?

PLAY, at £425, was found to be the cheapest airline from Washington, D.C. to London.Alternate airlines flying return to your destination include Icelandair and Scandinavian Airlines. These flights start at 26% 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 Icelandair, with whom users have recently found tickets for as low as £177. However, be on the lookout for offers from PLAY and TAP AIR PORTUGAL, as they are both options that can get you from Washington, D.C. to London for a low price.

What is the cheapest day to fly from Washington, D.C. to London?

Travellers seeking maximum savings on their Washington, D.C. to London flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 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 £339 on average our data indicates £1,576 when flying from Washington, D.C. to London.

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 (94%), Delta (94%), Air France( 93%).

What are the most popular airlines that fly from Washington, D.C. to London?

Before booking your flight from Washington, D.C. to London check out the most popular airlines for this route: Air France, British Airways or Icelandair.

What is the cheapest day to fly round-trip from Washington, D.C. to London?

Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 20% on the overall cost on flights from Washington, D.C. to London.

How far in advance should I book a flight from Washington, D.C. to London?

Find a great deal and save up to 16% by booking at least 39 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. to London within the next two weeks, with the cheapest ticket starting at £620.

What is the cheapest month to fly from Washington, D.C. to London?

January is one of the best times of the year to fly to London from Washington, D.C.. Prices for January average £579 per person but you can even find prices for as low as £298. The most expensive prices can be found in the month of June. Opting for a January flight can save you 34% on your journey compared to booking in June

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.

£123+ Flights from Washington, D.C. to London

Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in January or October, booked 73 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from Washington, D.C. to London

Round-trip from	£425
One-way from	£123
Popular in	June
Cheapest in	January
Average price	£521
Good round-trip deal	£483 or less
Good one-way deal	£312 or less

28/4-20/5
3 total stops
44h 15m total
Washington, D.C. to London

Search Deals

5/4
1 total stop
22h 49m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£77 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 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

Find flight deals from Washington, D.C. to London

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 26 March 2025.

Mon 28/418:50BWI - LHR

2 stops19h 00mMultiple Airlines

Tue 20/521:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 25/3£425

Fri 26/920:30BWI - LGW

1 stop13h 10mIcelandair

Fri 3/1015:40LGW - BWI

1 stop32h 45mIcelandair

Deal found 25/3£425

Tue 22/418:50BWI - STN

1 stop10h 50mPLAY

Wed 14/511:40STN - BWI

1 stop11h 00mPLAY

Deal found 26/3£425

Sun 27/420:30BWI - LHR

1 stop18h 50mIcelandair

Tue 6/513:05LHR - BWI

1 stop11h 20mIcelandair

Deal found 25/3£426

Thu 8/519:38BWI - LGW

1 stop30h 17mMultiple Airlines

Mon 12/510:00LGW - BWI

1 stop18h 33mMultiple Airlines

Deal found 26/3£427

Wed 23/418:50BWI - STN

2 stops16h 30mMultiple Airlines

Tue 29/411:15STN - BWI

2 stops35h 25mMultiple Airlines

Deal found 25/3£432

Mon 21/422:05IAD - LHR

1 stop18h 35mScandinavian Airlines

Tue 29/407:05LHR - IAD

2 stops17h 54mScandinavian Airlines

Deal found 25/3£456

Tue 25/312:29DCA - LHR

1 stop13h 26mJetBlue

Sun 30/308:15LHR - DCA

1 stop17h 44mJetBlue

Deal found 25/3£457

Thu 24/420:30IAD - LGW

1 stop13h 10mIcelandair

Wed 30/415:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 26/3£459

Tue 22/415:55IAD - LHR

1 stop9h 35mMultiple Airlines

Tue 29/419:30LHR - IAD

1 stop24h 05mMultiple Airlines

Deal found 24/3£459

Wed 7/522:05IAD - STN

2 stops17h 50mMultiple Airlines

Thu 15/509:20STN - IAD

2 stops15h 39mMultiple Airlines

Deal found 26/3£463

Wed 2/420:30IAD - LHR

1 stop10h 25mIcelandair

Wed 23/421:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 25/3£463

Best flights from Washington, D.C. to London
Discover carefully curated flight deals from Washington, D.C. to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 26 March 2025.

Mon 28/418:50BWI - LHR

2 stops19h 00mMultiple Airlines

Tue 20/521:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 25/3£425

Tue 22/418:50BWI - STN

1 stop10h 50mPLAY

Wed 14/511:40STN - BWI

1 stop11h 00mPLAY

Deal found 26/3£425

Sun 27/420:30BWI - LHR

1 stop18h 50mIcelandair

Tue 6/513:05LHR - BWI

1 stop11h 20mIcelandair

Deal found 25/3£426

Mon 21/422:05IAD - LHR

1 stop18h 35mScandinavian Airlines

Tue 29/407:05LHR - IAD

2 stops17h 54mScandinavian Airlines

Deal found 25/3£456

Tue 29/413:00DCA - LHR

1 stop12h 30mJetBlue

Wed 21/508:25LHR - DCA

1 stop14h 40mJetBlue

Deal found 25/3£459

Mon 22/917:45IAD - LGW

2 stops21h 40mTAP AIR PORTUGAL

Tue 30/916:25LGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Deal found 26/3£470

Sun 4/521:20BWI - LHR

Nonstop7h 15mIberia

Tue 13/516:35LHR - BWI

Nonstop8h 00mIberia

Deal found 24/3£470

Mon 21/420:25IAD - LHR

1 stop9h 45mAer Lingus

Tue 29/409:50LHR - IAD

1 stop11h 00mAer Lingus

Deal found 25/3£478

Sun 4/518:30IAD - LHR

Nonstop7h 25mUnited Airlines

Tue 13/513:45LHR - IAD

1 stop31h 30mUnited Airlines

Deal found 24/3£481

Wed 16/417:50IAD - LHR

Nonstop7h 30mDelta

Tue 22/406:15LHR - IAD

1 stop15h 05mDelta

Deal found 24/3£489

Wed 30/412:30DCA - LGW

1 stop14h 40mBritish Airways

Tue 6/515:05LGW - DCA

1 stop12h 31mBritish Airways

Deal found 26/3£490

Mon 28/411:00DCA - LHR

1 stop18h 00mAir Canada

Wed 14/509:30LHR - DCA

1 stop11h 19mAir Canada

Deal found 26/3£496

Direct flights from Washington, D.C. to London
Explore direct flight options from Washington, D.C. to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 26 March 2025.

Sun 21/921:20BWI - LHR

Nonstop7h 15mIberia

Tue 30/916:35LHR - BWI

Nonstop8h 00mIberia

Deal found 24/3£452

Tue 29/417:40IAD - LHR

Nonstop7h 35mIberia

Wed 7/512:45LHR - IAD

Nonstop8h 00mIberia

Deal found 24/3£456

Tue 22/422:40IAD - LHR

Nonstop7h 25mFinnair

Tue 29/417:00LHR - IAD

Nonstop8h 10mFinnair

Deal found 24/3£487

Wed 23/417:50IAD - LHR

Nonstop7h 30mDelta

Tue 6/512:35LHR - IAD

Nonstop8h 25mDelta

Deal found 25/3£495

Sun 21/921:20BWI - LHR

Nonstop7h 15mBritish Airways

Tue 7/1016:35LHR - BWI

Nonstop8h 00mBritish Airways

Deal found 26/3£497

Sun 21/917:50IAD - LHR

Nonstop7h 25mBritish Airways

Tue 30/912:45LHR - IAD

Nonstop8h 15mBritish Airways

Deal found 25/3£497

Mon 21/417:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 29/412:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 25/3£504

Tue 15/421:20BWI - LHR

Nonstop7h 15mAmerican Airlines

Thu 1/516:35LHR - BWI

Nonstop8h 00mAmerican Airlines

Deal found 25/3£518

Tue 8/421:20BWI - LHR

Nonstop7h 15mFinnair

Tue 15/416:35LHR - BWI

Nonstop8h 00mFinnair

Deal found 25/3£534

Mon 18/822:20IAD - LHR

Nonstop7h 20mUnited Airlines

Fri 29/812:15LHR - IAD

Nonstop8h 20mUnited Airlines

Deal found 26/3£552

Last-minute flights from Washington, D.C. to London
Discover last-minute flight deals from Washington, D.C. to London. Data last updated 26 March 2025 and is based on user searches.

Sun 30/322:20IAD - LGW

2 stops17h 05mTAP AIR PORTUGAL

Wed 2/410:35LGW - IAD

1 stop15h 15mTAP AIR PORTUGAL

Deal found 26/3£463

Mon 31/318:50BWI - STN

2 stops20h 20mMultiple Airlines

Wed 30/411:40STN - BWI

1 stop11h 00mMultiple Airlines

Deal found 24/3£446

Mon 31/309:00DCA - LHR

1 stop16h 30mJetBlue

Fri 25/408:15LHR - DCA

1 stop17h 44mJetBlue

Deal found 25/3£459

Mon 31/322:20IAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Wed 9/416:25LGW - IAD

1 stop33h 25mTAP AIR PORTUGAL

Deal found 26/3£509

Mon 31/322:20IAD - LHR

1 stop15h 30mTAP AIR PORTUGAL

Wed 9/419:50LHR - IAD

1 stop30h 00mTAP AIR PORTUGAL

Deal found 26/3£510

Tue 1/415:13BWI - LGW

1 stop13h 47mMultiple Airlines

Mon 14/406:20LGW - BWI

2 stops32h 47mMultiple Airlines

Deal found 26/3£449

Wed 2/418:50BWI - STN

1 stop10h 50mPLAY

Mon 14/411:40STN - BWI

1 stop11h 00mPLAY

Deal found 25/3£436

Wed 2/420:30IAD - LHR

1 stop10h 25mIcelandair

Wed 23/421:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 25/3£463

Wed 2/420:30BWI - LHR

1 stop10h 25mIcelandair

Mon 14/421:25LHR - BWI

1 stop27h 00mIcelandair

Deal found 25/3£472

Wed 2/422:05IAD - STN

2 stops16h 00mMultiple Airlines

Wed 9/406:00STN - IAD

2 stops18h 59mMultiple Airlines

Deal found 24/3£513

Thu 3/420:30IAD - LGW

1 stop10h 15mIcelandair

Tue 15/415:40LGW - IAD

1 stop32h 40mIcelandair

Deal found 26/3£492

Fri 4/418:50BWI - LHR

2 stops32h 00mMultiple Airlines

Wed 23/421:25LHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 25/3£509

One-way flights from Washington, D.C. to London
Search for one-way flight options from Washington, D.C. to London. Find affordable one-way fares based on user searches. Data last updated 26 March 2025.

Sat 5/406:11BWI - LGW

1 stop22h 49mMultiple Airlines

Deal found 26/3£123

Sat 5/720:30BWI - LGW

1 stop10h 15mIcelandair

Deal found 26/3£177

Mon 28/420:30BWI - LHR

1 stop10h 25mIcelandair

Deal found 26/3£186

Mon 28/418:50BWI - STN

1 stop10h 50mPLAY

Deal found 26/3£186

Mon 31/318:50BWI - STN

2 stops40h 05mMultiple Airlines

Deal found 26/3£188

Tue 22/713:29IAD - LGW

1 stop15h 31mMultiple Airlines

Deal found 26/3£189

Sun 20/722:20IAD - LHR

1 stop18h 40mTAP AIR PORTUGAL

Deal found 25/3£190

Wed 30/420:30IAD - LHR

1 stop18h 50mIcelandair

Deal found 25/3£191

Tue 8/409:00DCA - LHR

1 stop16h 30mJetBlue

Deal found 25/3£193

Sun 17/817:45IAD - STN

2 stops25h 14mMultiple Airlines

Deal found 26/3£194

Mon 7/420:30IAD - LHR

2 stops19h 50mMultiple Airlines

Deal found 25/3£198

Sat 2/822:35IAD - LGW

1 stop30h 10mTAP AIR PORTUGAL

Deal found 26/3£199

Cheapflights Fare Finder

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

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Mon 28/4

18:50-18:50

2 stops19h 00m

London Heathrow

Tue 20/5

21:25-17:40

1 stop25h 15m

£425

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Tue 22/4

18:50-10:40

1 stop10h 50m

London Stansted

Wed 14/5

11:40-17:40

1 stop11h 00m

£425

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 27/4

20:30-20:20

1 stop18h 50m

London Heathrow

Tue 6/5

13:05-19:25

1 stop11h 20m

£426

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Thu 8/5

19:38-06:55

1 stop30h 17m

London Gatwick

Mon 12/5

10:00-23:33

1 stop18h 33m

£427

BaltimoreLondon

BWI - LGW

BWILGW

Baltimore/Washington

Sun 21/9

20:30-14:40

1 stop13h 10m

London Gatwick

Sun 28/9

15:40-19:25

1 stop32h 45m

£430

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Wed 23/4

18:50-16:20

2 stops16h 30m

London Stansted

Tue 29/4

11:15-17:40

2 stops35h 25m

£432

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 21/4

22:05-21:40

1 stop18h 35m

London Heathrow

Tue 29/4

07:05-19:59

2 stops17h 54m

£456

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 24/4

20:30-14:40

1 stop13h 10m

London Gatwick

Wed 30/4

15:40-19:20

1 stop32h 40m

£459

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 29/4

13:00-06:30

1 stop12h 30m

London Heathrow

Wed 21/5

08:25-18:05

1 stop14h 40m

£459

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Tue 9/9

13:45-09:35

1 stop14h 50m

London Gatwick

Wed 1/10

12:10-20:51

1 stop13h 41m

£463

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 60 results

...

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?

The best time to book flights from Washington, D.C. to London is 73 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, January is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £112). Flying from Washington, D.C. to London in August is currently the most expensive (average of £164). 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?

It’s optimal to fly from Washington, D.C. to London in the afternoon. By choosing this option you can save up to 57% on the cost of your flight, compared to a flight in the morning.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Read through reviews of airlines operating flights from Washington, D.C. to London, such as Delta, Porter Airlines and KLM. 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.

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,895 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

7.9

Good

276 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,319 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,266 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Washington, D.C. to London round-trip?
PLAY, at £425, was found to be the cheapest airline from Washington, D.C. to London.Alternate airlines flying return to your destination include Icelandair and Scandinavian Airlines. These flights start at 26% 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 Icelandair, with whom users have recently found tickets for as low as £177. However, be on the lookout for offers from PLAY and TAP AIR PORTUGAL, 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 (94%), Delta (94%), Air France( 93%).
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 £339 on average our data indicates £1,576 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, January is the cheapest month in which you can book a flight from Washington, D.C. to London (average of £112). Flying from Washington, D.C. to London in August is currently the most expensive (average of £164). 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

Hounslow

Deal

Milton Keynes

Gatwick

Croydon

Luton

Slough

Eastbourne

Wembley

Hayes

Ilford

Crawley

Southend-on-Sea

Winchester

Maidstone

Ipswich

Watford

Southall

Dartford

Folkestone

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Washington, D.C. to London

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

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£371	Average£673	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Iberia	Cheapest£431	Average£594	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Air France	Cheapest£442	Average£562	FlexibilityNo cancel fee	On-time77%	Search Air France flights
British Airways	Cheapest£442	Average£611	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£452	Average£687	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£481	Average£583	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Lufthansa	Cheapest£512	Average£763	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£514	Average£723	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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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Cheap flights from Washington, D.C. to London from £123

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in January or October, booked 73 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from Washington, D.C. to London

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Find flight deals from Washington, D.C. to London

Cheapest flights from Washington, D.C. to LondonExplore 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 26 March 2025.

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 26 March 2025.

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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.

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 21 March 2025.

What is the cheapest month to book a flight from Washington, D.C. to London?

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 26 March 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

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 26 March 2025.

Read through reviews of airlines operating flights from Washington, D.C. to London, such as Delta, Porter Airlines and KLM. 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.

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.

What are the cheapest airlines flying from Washington, D.C. to London round-trip?

What are the cheapest airlines to fly from Washington, D.C. to London one-way?

What are the most popular routes from Washington, D.C. to London?

What are the most reliable airlines from Washington, D.C. to London?

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

Can I find deals for flights from Washington, D.C. to London that include hotel bookings?

How can I find direct flights from Washington, D.C. to London?

Can I find deals for business class flights from Washington, D.C. to London?

What is the cheapest month to book a flight from Washington, D.C. to London?

Travelling to a place near Washington, D.C.?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to London

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

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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 26 March 2025.