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Cheap flights from the United Kingdom to Washington, D.C. from £252

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
16 Aug — 23 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Washington, D.C.
Explore the most affordable flight options available from United Kingdom to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 July 2026.

Mon 24/806:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Wed 9/922:35
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Deal found 14/7£435
Mon 24/815:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Wed 9/920:30
IAD
-
LGW
1 stop13h 10m
Icelandair
Deal found 14/7£435
Tue 22/913:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Wed 30/923:20
IAD
-
LHR
1 stop16h 00m
Icelandair
Deal found 12/7£436
Wed 26/813:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Wed 9/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 13/7£437
Tue 22/1211:55
LGW
-
IAD
1 stop11h 35m
Icelandair
Wed 30/1219:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 13/7£437
Wed 2/906:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Wed 16/922:35
IAD
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 16/7£438
Thu 3/906:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Wed 9/922:35
IAD
-
LHR
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 14/7£438
Tue 22/915:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Wed 30/923:20
IAD
-
LGW
1 stop10h 20m
Icelandair
Deal found 12/7£438
Wed 7/1015:30
STN
-
IAD
2 stops28h 40m
Multiple Airlines
Wed 21/1017:45
IAD
-
STN
2 stops20h 35m
Multiple Airlines
Deal found 12/7£438
Wed 9/913:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Mon 14/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 16/7£439
Thu 17/910:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Sat 3/1017:05
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 14/7£439
Mon 31/813:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Thu 10/920:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 12/7£440

Find flight deals from United Kingdom to Washington, D.C.

Keep the following information in mind while searching for United Kingdom to Washington, D.C. flight deals. Data was last updated 17 July 2026.

Round-trip from

£435

One-way from

£252

Popular in

June

Cheapest in

February

Average price

£563

Good round-trip deal

£471 or less

Good one-way deal

£445 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 24/8-9/9
  • 2 total stops
  • 29h 25m total
  • United Kingdom to Washington, D.C.
Search Deals
25/8
  • 25/8
  • 3 total stops
  • 26h 39m total
  • United Kingdom to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from United Kingdom to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 17 July 2026.
Use the filters below to find and compare flights from the United Kingdom to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Wed 7/10

09:40-15:10

2 stops34h 30m

Washington, D.C. Dulles Intl

Wed 21/10

17:45-18:05

2 stops19h 20m

£453

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 9/9

19:50-15:10

1 stop24h 20m

Washington, D.C. Dulles Intl

Mon 21/9

17:40-22:55

1 stop24h 15m

£458

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 23/9

08:40-16:45

1 stop13h 05m

Washington, D.C. Dulles Intl

Sun 27/9

18:35-06:55

Nonstop7h 20m

£469

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Thu 17/9

08:00-18:55

1 stop15h 55m

Washington, D.C. Dulles Intl

Sun 20/9

17:00-14:05

1 stop16h 05m

£482

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 14/10

13:05-19:25

1 stop11h 20m

Baltimore/Washington

Sun 18/10

20:30-20:20

1 stop18h 50m

£485

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Wed 7/10

15:40-19:25

1 stop32h 45m

Baltimore/Washington

Mon 12/10

20:30-14:40

1 stop13h 10m

£490

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 18/8

07:00-14:15

1 stop12h 15m

Washington, D.C. Dulles Intl

Tue 8/9

08:35-06:30

2 stops16h 55m

£492

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 1/9

09:30-21:29

2 stops40h 59m

Baltimore/Washington

Fri 11/9

08:25-09:00

1 stop19h 35m

£498

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 8/10

14:05-21:50

1 stop12h 45m

Washington, D.C. Reagan-National

Tue 13/10

14:59-05:55

1 stop9h 56m

£500

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Tue 15/9

15:40-19:25

1 stop32h 45m

Baltimore/Washington

Fri 25/9

20:30-14:40

1 stop13h 10m

£504

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from United Kingdom to Washington, D.C.

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

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

Currently, February is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. (average of £495). Flying from United Kingdom to Washington, D.C. in August is currently the most expensive (average of £605). 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 GB to WAS?

Find hourly flight availability from United Kingdom 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 17 July 2026.

When flying from United Kingdom to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from United Kingdom to Washington, D.C.

Explore weekly flight availability from United Kingdom 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 17 July 2026.

The most flights from GB0 to WAS are scheduled on a Tuesday (29 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

How often are flights from the United Kingdom to Washington, D.C. delayed?

About 17% of weekly flights between United Kingdom and Washington, D.C. have experienced delays in the past year, with the average delay time being 139 minutes.

What is the most punctual flight time for the United Kingdom to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on the United Kingdom to Washington, D.C. flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

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

The best time to book flights from United Kingdom to Washington, D.C. is 81 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.

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 17 July 2026.
Check out reviews from past customers who have flown with Virgin Atlantic,Aer Lingus, andIcelandair from the United Kingdom 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.
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
693 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Aer Lingus
7.3
Good
1,670 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
710 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,143 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,124 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.5

Boarding

7.7

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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.

  • How long is the flight from United Kingdom to Washington, D.C.?

    For as low as £485, TAP AIR PORTUGAL can have you in Washington, D.C. from United Kingdom in 11h 20m. The distance between United Kingdom and Washington, D.C. is about 3622 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    £300 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on British Airways and Aer Lingus, with prices starting from £342 and £351, respectively.

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

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

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

    The top 3 most reliable airlines when flying from United Kingdom to Washington, D.C. are Air Canada (85%), Austrian Airlines (85%) and Copa Airlines (85%).

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

    While on average a flight from United Kingdom to Washington, D.C. is generally £1,514, our data shows the cheapest flight currently is £372. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £350 for that flight.

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

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

  • How can I find direct flights from United Kingdom 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 United Kingdom to Washington, D.C..

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

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

    Currently, February is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. (average of £495). Flying from United Kingdom to Washington, D.C. in August is currently the most expensive (average of £605). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria

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Alternative routes for United Kingdom to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Gatwick to Dulles Intl flights
Heathrow to Reagan-National flights
London City to Dulles Intl flights
Stansted to Dulles Intl flights
Luton to Dulles Intl flights
Gatwick to Reagan-National flights
Manchester to Dulles Intl flights
Edinburgh to Dulles Intl flights
Manchester to Reagan-National flights
Birmingham to Dulles Intl flights
Birmingham to Reagan-National flights
Edinburgh to Reagan-National flights
Glasgow Intl to Dulles Intl flights
London City to Reagan-National flights
Glasgow Intl to Reagan-National flights
Dublin to Dulles Intl flights
Leeds to Dulles Intl flights
Bristol to Dulles Intl flights
Amsterdam to Dulles Intl flights
Southampton to Dulles Intl flights
Newcastle upon Tyne to Dulles Intl flights
Frankfurt to Dulles Intl flights
Leeds to Reagan-National flights
Belfast Intl to Dulles Intl flights
Southend to Dulles Intl flights
Belfast City to Dulles Intl flights
Newcastle upon Tyne to Reagan-National flights
Cardiff to Dulles Intl flights
Aberdeen to Dulles Intl flights
Madrid to Dulles Intl flights
Norwich to Dulles Intl flights
Inverness to Dulles Intl flights
Southampton to Reagan-National flights
Norwich to Reagan-National flights
Inverness to Reagan-National flights
Cardiff to Reagan-National flights
Bristol to Reagan-National flights
Istanbul to Dulles Intl flights
Exeter to Dulles Intl flights
Aberdeen to Reagan-National flights

Top 10 airlines flying from United Kingdom to Washington, D.C.

Discover the top 10 airlines that operate flights from United Kingdom 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 17 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£322Average£529FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£331Average£645FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
TAP AIR PORTUGALCheapest£347Average£505FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£361Average£649FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£363Average£607FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£363Average£647FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£374Average£602FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£380Average£672FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£403Average£607FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£404Average£637FlexibilityNo cancel feeOn-time70%
Search British Airways 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 United Kingdom to Washington, D.C.?

Cheapflights helps you search for flights from United Kingdom to Washington, D.C. via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from United Kingdom to Washington, D.C. for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to Washington, D.C. from United Kingdom? 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 United Kingdom to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on United Kingdom to Washington, D.C. flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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