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Cheap flights from Washington, D.C. Dulles Intl Airport to the United Kingdom from £159

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. Dulles Intl Airport to the United Kingdom departing on 14/9. 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. Dulles Intl Airport to the United Kingdom

Cheap return flights

TAP AIR PORTUGAL Logo
22:30 - 22:40IAD-LHR
19h 10m1 stop
TAP AIR PORTUGAL Logo
18:30 - 15:15LHR-IAD
25h 45m1 stop
£308TAP AIR PORTUGAL
Find Deal
Fri, 28 Nov - Wed, 28 Jan
TAP AIR PORTUGAL Logo
17:30 - 15:50IAD-LGW
17h 20m1 stop
TAP AIR PORTUGAL Logo
16:35 - 15:15LGW-IAD
27h 40m1 stop
£313TAP AIR PORTUGAL
Find Deal
Thu, 27 Nov - Wed, 3 Dec
Virgin Atlantic Logo
12:39 - 06:45IAD-LHR
13h 06m1 stop
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
£327Virgin Atlantic
Find Deal
Sun, 17 Aug - Tue, 26 Aug
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
£330Virgin Atlantic
Find Deal
Sun, 17 Aug - Tue, 26 Aug
British Airways Logo
17:50 - 06:15IAD-LHR
7h 25mdirect
British Airways Logo
06:15 - 15:00LHR-IAD
13h 45m1 stop
£365British Airways
Find Deal
Tue, 23 Sep - Thu, 9 Oct
British Airways Logo
19:25 - 07:45IAD-LHR
7h 20mdirect
British Airways Logo
06:10 - 15:00LHR-IAD
13h 50m1 stop
£367British Airways
Find Deal
Tue, 2 Sep - Tue, 9 Sep
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
£367Icelandair
Find Deal
Fri, 3 Oct - Mon, 6 Oct
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
Icelandair Logo
15:40 - 22:10LGW-IAD
11h 30m1 stop
£368Icelandair
Find Deal
Tue, 30 Sep - Sun, 12 Oct
Iberia Logo
16:35 - 18:35IAD-MAN
21h 00m1 stop
Iberia Logo
19:15 - 15:00MAN-IAD
24h 45m1 stop
£451Iberia
Find Deal
Mon, 13 Oct - Wed, 22 Oct
Iberia Logo
16:35 - 18:35IAD-MAN
21h 00m1 stop
Iberia Logo
19:15 - 15:00MAN-IAD
24h 45m1 stop
£452Iberia
Find Deal
Sun, 17 Aug - Wed, 27 Aug

British Airways flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best British Airways deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets
British Airways
23 Sept
IAD17:50Washington, D.C. Dulles Intl
7h 25m
LHR06:15London Heathrow
9 Oct
LHR06:15London Heathrow
13h 45m
1 stop
IAD15:00Washington, D.C. Dulles Intl
£365
Find similar
British Airways
2 Sept
IAD19:25Washington, D.C. Dulles Intl
7h 20m
LHR07:45London Heathrow
9 Sept
LHR06:10London Heathrow
13h 50m
1 stop
IAD15:00Washington, D.C. Dulles Intl
£367
Find similar
British Airways
21 Sept
IAD19:25Washington, D.C. Dulles Intl
7h 20m
LHR07:45London Heathrow
30 Sept
LHR17:00London Heathrow
8h 10m
IAD20:10Washington, D.C. Dulles Intl
£370
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Scandinavian Airlines flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best Scandinavian Airlines deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets
Scandinavian Airlines
28 Sept
IAD22:05Washington, D.C. Dulles Intl
37h 55m
2 stops
LHR17:00London Heathrow
1 Oct
LHR06:40London Heathrow
18h 19m
1 stop
IAD19:59Washington, D.C. Dulles Intl
£337
Find similar
Scandinavian Airlines
12 Nov
IAD20:30Washington, D.C. Dulles Intl
35h 25m
2 stops
LHR12:55London Heathrow
15 Nov
LHR10:20London Heathrow
13h 30m
1 stop
IAD18:50Washington, D.C. Dulles Intl
£338
Find similar
Scandinavian Airlines
26 Sept
IAD22:05Washington, D.C. Dulles Intl
33h 50m
2 stops
LHR12:55London Heathrow
29 Sept
LHR07:05London Heathrow
17h 54m
2 stops
IAD19:59Washington, D.C. Dulles Intl
£343
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momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 6 August 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 28/11

22:30-22:40

1 stop19h 10m

London Heathrow

Wed 28/1

18:30-15:15

1 stop25h 45m

£308

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 27/11

17:30-15:50

1 stop17h 20m

London Gatwick

Wed 3/12

16:35-15:15

1 stop27h 40m

£313

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 17/8

12:39-06:45

1 stop13h 06m

London Heathrow

Tue 26/8

12:35-16:00

Nonstop8h 25m

£327

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 17/8

17:50-06:20

Nonstop7h 30m

London Heathrow

Tue 26/8

12:35-16:00

Nonstop8h 25m

£330

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 23/9

17:50-06:15

Nonstop7h 25m

London Heathrow

Thu 9/10

06:15-15:00

1 stop13h 45m

£365

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 2/9

19:25-07:45

Nonstop7h 20m

London Heathrow

Tue 9/9

06:10-15:00

1 stop13h 50m

£367

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 3/10

20:30-14:40

1 stop13h 10m

London Gatwick

Mon 6/10

15:40-19:20

1 stop32h 40m

£367

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 30/9

20:30-14:40

1 stop13h 10m

London Gatwick

Sun 12/10

15:40-22:10

1 stop11h 30m

£368

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Mon 13/10

16:35-18:35

1 stop21h 00m

Manchester

Wed 22/10

19:15-15:00

1 stop24h 45m

£451

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Sun 17/8

16:35-18:35

1 stop21h 00m

Manchester

Wed 27/8

19:15-15:00

1 stop24h 45m

£452

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport is in January. Flight prices, which tend to average around £466, 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. Dulles Intl Airport during the month October is also very affordable. Most momondo users find prices during this month for around £470.

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

The cheapest day to depart from Washington, D.C. Dulles Intl Airport 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 £543. 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. Dulles Intl Airport to United Kingdom for around £631.

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 £571. Try not to purchase tickets in the afternoon because they tend to be around £595. 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. Dulles Intl to United Kingdom flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. Dulles Intl - 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. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £571 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. Dulles Intl Airport for as low as £515 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl 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. Dulles Intl Airport to United Kingdom flights?

You could potentially save up to 50% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to United Kingdom flight.

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

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

Best price found

£159

Fastest flight time

7h 10m

Direct flights

Every day

Airports in United Kingdom

9 airports
The best one-way flight to United Kingdom from Washington, D.C. Dulles Intl Airport in the past 72 hours is £159. The best return flight deal from Washington, D.C. Dulles Intl Airport to United Kingdom found on momondo in the last 72 hours is £308.
The fastest flight from Washington, D.C. Dulles Intl Airport to United Kingdom takes 7h 10m
Direct flights go from Washington, D.C. Dulles Intl Airport to United Kingdom every day.
There are 9 airports near United Kingdom: London City (LCY), London Heathrow (LHR), London Luton (LTN), Southampton Eastleigh (SOU), Manchester (MAN), Edinburgh Turnhouse (EDI), London Stansted (STN), London Gatwick (LGW), Glasgow Intl (GLA)
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  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to United Kingdom?

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to United Kingdom.

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

    The travel and health documents you'll need for your trip to United Kingdom may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at United Kingdom. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £312Free CancellationRating
6.8
7,287 reviews
Search Lufthansa flights
IcelandairPriceFrom £340Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £382Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
Air FrancePriceFrom £401Free CancellationRating
7.5
1,466 reviews
Search Air France flights
British AirwaysPriceFrom £411Free CancellationRating
6.6
7,237 reviews
Search British Airways flights
Aer LingusPriceFrom £446Free CancellationRating
7.1
1,197 reviews
Search Aer Lingus flights
United AirlinesPriceFrom £460Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
IberiaPriceFrom £462Free CancellationRating
7.0
2,865 reviews
Search Iberia flights
KLMPriceFrom £464Free CancellationRating
7.8
1,381 reviews
Search KLM flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to United Kingdom from Washington, D.C..

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

All flight searches from Washington, D.C. to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Washington, D.C. and United Kingdom by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Washington, D.C. to United Kingdom now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to United Kingdom and let you know when they change.

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