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Cheap flights from Washington, D.C. to the United Kingdom from £149

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to the United Kingdom departing on 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to the United Kingdom

Cheap return flights

Logo
19:40 - 15:30IAD-LGW
14h 50m1 stop
Logo
07:40 - 18:30LGW-IAD
15h 50m1 stop
£367
Find Deal
Mo, 1 Dez - Mo, 8 Dez
Scandinavian Airlines Logo
22:05 - 17:40IAD-LHR
14h 35m1 stop
Scandinavian Airlines Logo
06:40 - 19:59LHR-IAD
18h 19m1 stop
£367Scandinavian Airlines
Find Deal
Mo, 13 Okt - Do, 16 Okt
Icelandair Logo
23:15 - 14:40IAD-LGW
10h 25m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£412Icelandair
Find Deal
So, 5 Okt - Di, 14 Okt
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
£419Icelandair
Find Deal
Di, 25 Nov - Fr, 5 Dez
British Airways Logo
15:35 - 08:10DCA-LGW
11h 35m1 stop
British Airways Logo
15:05 - 22:57LGW-DCA
12h 52m1 stop
£454British Airways
Find Deal
Di, 30 Sep - Di, 7 Okt
British Airways Logo
15:35 - 08:10DCA-LGW
11h 35m1 stop
British Airways Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
£457British Airways
Find Deal
Mi, 10 Sep - Mi, 1 Okt
Iberia Logo
18:00 - 20:00DCA-LGW
21h 00m2 stops
Iberia Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
£462Iberia
Find Deal
Mo, 8 Sep - Do, 18 Sep
Iberia Logo
15:35 - 06:20DCA-LHR
9h 45m1 stop
Iberia Logo
19:10 - 23:07LHR-DCA
32h 57m2 stops
£468Iberia
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So, 7 Sep - Mo, 15 Sep
Virgin Atlantic Logo
12:20 - 10:00DCA-LGW
16h 40m2 stops
Virgin Atlantic Logo
12:00 - 10:14LGW-DCA
27h 14m1 stop
£496Virgin Atlantic
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Di, 2 Sep - So, 7 Sep
Virgin Atlantic Logo
17:25 - 08:10IAD-LCY
9h 45m1 stop
Virgin Atlantic Logo
10:00 - 15:35LCY-IAD
10h 35m1 stop
£502Virgin Atlantic
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Mo, 1 Sep - Di, 9 Sep

KLM flights from Washington, D.C. to United Kingdom

Our best KLM deals on Washington, D.C. to United Kingdom flight tickets
KLM
7 Sept
DCA17:00Washington, D.C. Reagan-National
10h 50m
1 stop
LHR08:50London Heathrow
16 Sept
LHR10:55London Heathrow
12h 02m
1 stop
DCA17:57Washington, D.C. Reagan-National
£455
Find similar
KLM
2 Sept
BWI19:29Baltimore/Washington
13h 01m
1 stop
LHR13:30London Heathrow
9 Sept
LHR15:15London Heathrow
14h 06m
1 stop
BWI00:21Baltimore/Washington
£477
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Air Canada flights from Washington, D.C. to United Kingdom

Our best Air Canada deals on Washington, D.C. to United Kingdom flight tickets
Air Canada
5 Oct
DCA16:35Washington, D.C. Reagan-National
12h 00m
1 stop
LHR09:35London Heathrow
14 Oct
LHR09:30London Heathrow
11h 21m
1 stop
DCA15:51Washington, D.C. Reagan-National
£456
Find similar
Air Canada
7 Sept
DCA20:40Washington, D.C. Reagan-National
32h 20m
1 stop
LHR10:00London Heathrow
16 Sept
LHR09:30London Heathrow
17h 21m
1 stop
DCA21:51Washington, D.C. Reagan-National
£459
Find similar
Air Canada
25 Nov
DCA16:10Washington, D.C. Reagan-National
10h 00m
1 stop
LHR07:10London Heathrow
2 Dec
LHR06:50London Heathrow
13h 41m
2 stops
DCA15:31Washington, D.C. Reagan-National
£493
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momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to United Kingdom 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, momondo users made 279,928 searches. Data last updated 21 August 2025.
Use the filters below to find and compare flights from Washington, D.C. to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mo 1/12

19:40-15:30

1 stop14h 50m

London Gatwick

Mo 8/12

07:40-18:30

1 stop15h 50m

£367

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mo 13/10

22:05-17:40

1 stop14h 35m

London Heathrow

Do 16/10

06:40-19:59

1 stop18h 19m

£367

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

So 5/10

23:15-14:40

1 stop10h 25m

London Gatwick

Di 14/10

15:40-19:20

1 stop32h 40m

£412

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Di 25/11

19:40-10:55

1 stop10h 15m

London Gatwick

Fr 5/12

11:55-18:30

1 stop11h 35m

£419

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Di 30/9

15:35-08:10

1 stop11h 35m

London Gatwick

Di 7/10

15:05-22:57

1 stop12h 52m

£454

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Mi 10/9

15:35-08:10

1 stop11h 35m

London Gatwick

Mi 1/10

15:05-23:07

1 stop13h 02m

£457

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Mo 8/9

18:00-20:00

2 stops21h 00m

London Gatwick

Do 18/9

15:05-23:07

1 stop13h 02m

£462

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

So 7/9

15:35-06:20

1 stop9h 45m

London Heathrow

Mo 15/9

19:10-23:07

2 stops32h 57m

£468

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Di 2/9

12:20-10:00

2 stops16h 40m

London Gatwick

So 7/9

12:00-10:14

1 stop27h 14m

£496

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mo 1/9

17:25-08:10

1 stop9h 45m

London City

Di 9/9

10:00-15:35

1 stop10h 35m

£502

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Washington, D.C. to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to United Kingdom?

The cheapest month to fly to United Kingdom from Washington, D.C. is in January. Flight prices, which tend to average around £478, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of January, then departing from Washington, D.C. during the month September is also very affordable. Most momondo users find prices during this month for around £483.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Washington, D.C. to United Kingdom is on a Wednesday. Travellers who choose to depart for United Kingdom on a Wednesday will often find tickets for as low as £531. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to United Kingdom for around £619.

What is the cheapest time of day to depart on your flight to United Kingdom?

The cheapest time of day to fly to United Kingdom is in the evening when flights can be purchased for as low as £565. Try not to purchase tickets in the afternoon because they tend to be around £582. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Washington, D.C. to United Kingdom flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - United Kingdom flight prices

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £559 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Washington, D.C. for as low as £514 on momondo.

What cabin class options are available on Washington, D.C. to United Kingdom flights?

There are 4 cabin classes available to choose from on Washington, D.C. to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. to United Kingdom flights?

You could potentially save up to 53% on your flight if you consider stops on a Washington, D.C. to United Kingdom flight.

Cheap Washington, D.C. to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to United Kingdom

Best price found

£284

Fastest flight time

7h 05m

Direct flights

Every day

Airports in United Kingdom

2 airports
The best one-way flight to United Kingdom from Washington, D.C. in the past 72 hours is £284. The best return flight deal from Washington, D.C. to United Kingdom found on momondo in the last 72 hours is £419.
The fastest flight from Washington, D.C. to United Kingdom takes 7h 05m
Direct flights go from Washington, D.C. to United Kingdom every day.
There are 2 airports near United Kingdom: London Heathrow (LHR), Edinburgh Turnhouse (EDI)
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  • When did momondo last update prices for flights from Washington, D.C. to United Kingdom?

    Prices for flights from Washington, D.C. to United Kingdom refresh daily.

  • How many operators does momondo search for flights from Washington, D.C. to United Kingdom?

  • How old do you have to be to fly from Washington, D.C. to United Kingdom?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Washington, D.C. to United Kingdom?

Best airlines flying from Washington, D.C. to United Kingdom

Compare and see reviews for airlines that fly from Washington, D.C. to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £308Free CancellationRating
6.8
7,344 reviews
Search Lufthansa flights
IcelandairPriceFrom £310Free CancellationRating
7.0
528 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £376Free CancellationRating
7.4
658 reviews
Search Virgin Atlantic flights
Air FrancePriceFrom £395Free CancellationRating
7.4
1,469 reviews
Search Air France flights
British AirwaysPriceFrom £406Free CancellationRating
6.7
7,291 reviews
Search British Airways flights
IberiaPriceFrom £413Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
Aer LingusPriceFrom £440Free CancellationRating
7.1
1,228 reviews
Search Aer Lingus flights
KLMPriceFrom £457Free CancellationRating
7.8
1,388 reviews
Search KLM flights
United AirlinesPriceFrom £485Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
American AirlinesPriceFrom £492Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to United Kingdom?

Finding the right flight to United Kingdom from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to United Kingdom quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to United Kingdom with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to United Kingdom from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to United Kingdom?

Once you have performed a search for Washington, D.C. to United Kingdom flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to United Kingdom right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to United Kingdom flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your United Kingdom trip

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Find better results for your trip to the United Kingdom

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
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