Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Washington, D.C. from £178

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — WAS
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or November, booked 84 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

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

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Washington, D.C. (WAS). 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 11 July 2025.

Round-trip from

£474

One-way from

£178

Popular in

July

Cheapest in

February

Average price

£657

Good round-trip deal

£538 or less

Good one-way deal

£589 or less
Icelandair
  • Icelandair
  • 3/10-25/10
  • 2 total stops
  • 43h 10m total
  • London to Washington, D.C.
Search Deals
6/10
  • 6/10
  • 2 total stops
  • 39h 43m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from London (LON) to Washington, D.C. (WAS).
Search Deals

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

Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Fri 3/1015:40LGW - IAD
1 stop11h 30mIcelandair
Sat 25/1023:15IAD - LGW
1 stop31h 40mIcelandair
Deal found 10/7£474
Mon 17/1106:40LHR - IAD
2 stops15h 35mScandinavian Airlines
Sat 29/1120:30IAD - LHR
2 stops14h 55mScandinavian Airlines
Deal found 11/7£476
Sat 6/1213:30LHR - DCA
1 stop11h 41mAmerican Airlines
Fri 19/1218:29DCA - LHR
1 stop9h 51mAmerican Airlines
Deal found 11/7£477
Thu 7/808:25LHR - DCA
1 stop11h 43mJetBlue
Thu 14/806:30DCA - LHR
1 stop9h 15mJetBlue
Deal found 10/7£478
Thu 6/1109:15LCY - IAD
1 stop12h 15mSWISS
Mon 10/1117:20IAD - LCY
2 stops14h 30mSWISS
Deal found 10/7£478
Thu 4/908:40LHR - IAD
1 stop11h 55mKLM
Wed 10/917:25IAD - LHR
1 stop12h 20mKLM
Deal found 9/7£479
Fri 29/811:55LHR - DCA
2 stops30h 03mIcelandair
Sun 31/806:30DCA - LHR
1 stop22h 00mIcelandair
Deal found 9/7£479
Tue 2/910:00LCY - IAD
1 stop10h 35mVirgin Atlantic
Fri 12/917:25IAD - LCY
1 stop9h 45mVirgin Atlantic
Deal found 9/7£479
Thu 21/813:10STN - IAD
3 stops35h 49mMultiple Airlines
Tue 26/822:05IAD - STN
2 stops19h 50mMultiple Airlines
Deal found 11/7£480
Wed 27/810:35LGW - IAD
1 stop15h 15mTAP AIR PORTUGAL
Tue 2/917:00IAD - LGW
2 stops13h 20mTAP AIR PORTUGAL
Deal found 9/7£481
Sat 13/1219:55LHR - IAD
1 stop30h 05mTAP AIR PORTUGAL
Sat 27/1217:30IAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Deal found 10/7£481
Mon 17/1107:50LHR - IAD
1 stop12h 45mAer Lingus
Wed 19/1121:00IAD - LHR
1 stop9h 25mAer Lingus
Deal found 9/7£482

Cheapflights Fare Finder

Customise your flight search to find flights from London to Washington, D.C. 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 11 July 2025.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

London

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 3/10

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sat 25/10

23:15-10:55

1 stop31h 40m

£474

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 17/11

06:40-17:15

2 stops15h 35m

Washington, D.C. Dulles Intl

Sat 29/11

20:30-16:25

2 stops14h 55m

£476

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Fri 31/10

09:55-21:15

1 stop15h 20m

Washington, D.C. Dulles Intl

Mon 3/11

22:00-16:40

1 stop13h 40m

£476

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sat 6/12

13:30-20:11

1 stop11h 41m

Washington, D.C. Reagan-National

Fri 19/12

18:29-09:20

1 stop9h 51m

£477

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 7/8

08:25-15:08

1 stop11h 43m

Washington, D.C. Reagan-National

Thu 14/8

06:30-20:45

1 stop9h 15m

£478

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Thu 6/11

09:15-16:30

1 stop12h 15m

Washington, D.C. Dulles Intl

Mon 10/11

17:20-12:50

2 stops14h 30m

£478

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 4/9

08:40-15:35

1 stop11h 55m

Washington, D.C. Dulles Intl

Wed 10/9

17:25-10:45

1 stop12h 20m

£479

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Tue 2/9

10:00-15:35

1 stop10h 35m

Washington, D.C. Dulles Intl

Fri 12/9

17:25-08:10

1 stop9h 45m

£479

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 29/8

11:55-12:58

2 stops30h 03m

Washington, D.C. Reagan-National

Sun 31/8

06:30-09:30

1 stop22h 00m

£479

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 21/8

13:10-19:59

3 stops35h 49m

Washington, D.C. Dulles Intl

Tue 26/8

22:05-22:55

2 stops19h 50m

£480

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 59 results
1
2
3
...
6

Best time to book a flight from London to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London 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 London to Washington, D.C.

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

Use this chart to determine the optimal time to book a return flight from London to Washington, D.C.. Price data was last updated on 27 June 2025.

Booking 84 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). 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 LON to WAS?

Find hourly flight availability from London to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the evening. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly return from London to Washington, D.C.. Price data was last updated on 16 December 2024.

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

Weekly flight availability from London to Washington, D.C.

Explore weekly flight availability from London to Washington, D.C.. 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 11 July 2025.

The most flights from LON to WAS are scheduled on a Wednesday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

How much does it cost for a return flight from London to Washington, D.C.?

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated 11 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andFinnair from London to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,312 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,467 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from London to Washington, D.C.. 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 London to Washington, D.C. round-trip?

    According to our current data, Icelandair (£474), Scandinavian Airlines (£476), and American Airlines (£477) offers the cheapest pricing from London to Washington, D.C.. Users have found that Icelandair is 13% cheaper than the other options available to this destination.

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

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as £391. Users have also found prices from £395 and £411 on TAP AIR PORTUGAL and Aer Lingus, respectively.

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

    When deciding which route to take from London to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Gatwick - Baltimore/Washington as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. on time: Air Canada (76%), Austrian Airlines (76%), Copa Airlines (76%).

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

    While on average a flight from London to Washington, D.C. is generally £1,778, our data shows the cheapest flight currently is £431. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £343 for that flight.

  • Where are the most common stopover locations when flying from London to Washington, D.C.?

    Most of the time, London to Washington, D.C. flights that have stopovers will stop in Reykjavik.

  • What are some popular things to do or see while on a stopover in Reykjavik?

    If you're on a stopover in Reykjavik and looking for things to do, consider visiting Harpa, National Cathedral, or Hallgrímskirkja. Travelers on a layover in Reykjavik can visit Harpa, National Cathedral, and Hallgrímskirkja, by traveling 23.3 mi, 23.0 mi, and 23.2 mi, respectively after landing at Reykjavik Keflavik Intl. Travellers can book a car hire at Reykjavik Keflavik Intl for about £46 per day to make their sightseeing more efficient.

  • Where are the least popular stopover locations for London to Washington, D.C. flights?

    Flights departing from London and landing in Washington, D.C. stopover in Dublin least frequently.

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

    Yes. In addition to deals on London to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Washington, D.C..

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

    Yes. Cheapflights offers flight deals from London to Washington, D.C. 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 London to Washington, D.C.?

    Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). 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
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
College Park
Laurel
Tysons

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from London to Washington, D.C. on these airlines

Choose from the following airlines for your flight from London to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 11 July 2025.
PLAY flights from London to Washington, D.C.
British Airways flights from London to Washington, D.C.
Virgin Atlantic flights from London to Washington, D.C.
Finnair flights from London to Washington, D.C.

Top 10 airlines flying from London to Washington, D.C.

Discover the top 10 airlines that operate flights from London to Washington, D.C.. 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£186Average£531FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£246Average£396FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
Air FranceCheapest£290Average£600FlexibilityNo cancel feeOn-time77%
Search Air France flights
IcelandairCheapest£352Average£519FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£365Average£547FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
JetBlueCheapest£370Average£617FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Scandinavian AirlinesCheapest£433Average£569FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
FinnairCheapest£433Average£624FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£442Average£627FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£446Average£688FlexibilityNo 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 London to Washington, D.C.?

When you search for this flight from London to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?

Cheapflights simply makes it quick and affordable to book flights from London to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to Washington, D.C. with no change fees?

Need flexible booking options for your flight to Washington, D.C. from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?

Of course! You can now track prices for flights from London to Washington, D.C. and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights