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Cheap flights from Washington, D.C. Dulles Intl Airport to the United Kingdom from $211

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 9/14. 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 round-trip flights

TAP AIR PORTUGAL Logo
10:30 pm - 10:40 pmIAD-LHR
19h 10m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 3:15 pmLHR-IAD
25h 45m1 stop
$410TAP AIR PORTUGAL
Find Deal
Fri, Nov 28 - Wed, Jan 28
TAP AIR PORTUGAL Logo
5:30 pm - 3:50 pmIAD-LGW
17h 20m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 3:15 pmLGW-IAD
27h 40m1 stop
$416TAP AIR PORTUGAL
Find Deal
Thu, Nov 27 - Wed, Dec 3
United Airlines Logo
7:20 pm - 6:40 amIAD-LHR
7h 20mnonstop
United Airlines Logo
6:50 am - 2:35 pmLHR-IAD
12h 45m1 stop
$467United Airlines
Find Deal
Tue, Oct 28 - Fri, Nov 7
United Airlines Logo
5:31 pm - 9:20 amIAD-LHR
10h 49m1 stop
United Airlines Logo
6:50 am - 2:25 pmLHR-IAD
12h 35m1 stop
$472United Airlines
Find Deal
Sun, Aug 17 - Tue, Aug 26
British Airways Logo
5:50 pm - 6:15 amIAD-LHR
7h 25mnonstop
British Airways Logo
6:15 am - 3:00 pmLHR-IAD
13h 45m1 stop
$485British Airways
Find Deal
Tue, Sep 23 - Thu, Oct 9
Icelandair Logo
8:30 pm - 2:40 pmIAD-LGW
13h 10m1 stop
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
$488Icelandair
Find Deal
Fri, Oct 3 - Mon, Oct 6
Icelandair Logo
8:30 pm - 2:40 pmIAD-LGW
13h 10m1 stop
Icelandair Logo
3:40 pm - 10:10 pmLGW-IAD
11h 30m1 stop
$489Icelandair
Find Deal
Tue, Sep 30 - Sun, Oct 12
Iberia Logo
6:00 pm - 10:50 amIAD-LGW
11h 50m1 stop
Iberia Logo
11:45 am - 4:30 pmLGW-IAD
33h 45m1 stop
$513Iberia
Find Deal
Tue, Nov 18 - Wed, Dec 3
British Airways Logo
5:29 pm - 6:00 pmIAD-INV
19h 31m2 stops
British Airways Logo
8:30 pm - 7:21 pmINV-IAD
27h 51m2 stops
$529British Airways
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Tue, Nov 4 - Fri, Nov 14
Iberia Logo
4:35 pm - 6:35 pmIAD-MAN
21h 00m1 stop
Iberia Logo
7:15 pm - 3:00 pmMAN-IAD
24h 45m1 stop
$599Iberia
Find Deal
Mon, Oct 13 - Wed, Oct 22

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
Sep 23
IAD5:50 pmWashington, D.C. Dulles Intl
7h 25m
LHR6:15 amLondon Heathrow
Oct 9
LHR6:15 amLondon Heathrow
13h 45m
1 stop
IAD3:00 pmWashington, D.C. Dulles Intl
$485
Find similar
British Airways
Nov 4
IAD5:29 pmWashington, D.C. Dulles Intl
19h 31m
2 stops
INV6:00 pmInverness
Nov 14
INV8:30 pmInverness
27h 51m
2 stops
IAD7:21 pmWashington, D.C. Dulles Intl
$529
Find similar
British Airways
Sep 26
IAD7:21 pmWashington, D.C. Dulles Intl
19h 49m
2 stops
INV8:10 pmInverness
Oct 11
INV9:00 pmInverness
25h 11m
2 stops
IAD5:11 pmWashington, D.C. Dulles Intl
$532
Find similar

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to United Kingdom

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to United Kingdom flight tickets
TAP AIR PORTUGAL
Nov 28
IAD10:30 pmWashington, D.C. Dulles Intl
19h 10m
1 stop
LHR10:40 pmLondon Heathrow
Jan 28
LHR6:30 pmLondon Heathrow
25h 45m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
$410
Find similar
TAP AIR PORTUGAL
Nov 27
IAD5:30 pmWashington, D.C. Dulles Intl
17h 20m
1 stop
LGW3:50 pmLondon Gatwick
Dec 3
LGW4:35 pmLondon Gatwick
27h 40m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
$416
Find similar
TAP AIR PORTUGAL
Sep 15
IAD10:20 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:35 pmLondon Gatwick
Oct 1
LGW4:25 pmLondon Gatwick
27h 55m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
$418
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 6, 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 11/28

10:30 pm-10:40 pm

1 stop19h 10m

London Heathrow

Wed 1/28

6:30 pm-3:15 pm

1 stop25h 45m

$410

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 11/27

5:30 pm-3:50 pm

1 stop17h 20m

London Gatwick

Wed 12/3

4:35 pm-3:15 pm

1 stop27h 40m

$416

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 10/28

7:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Fri 11/7

6:50 am-2:35 pm

1 stop12h 45m

$467

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 8/17

5:31 pm-9:20 am

1 stop10h 49m

London Heathrow

Tue 8/26

6:50 am-2:25 pm

1 stop12h 35m

$472

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 9/23

5:50 pm-6:15 am

Nonstop7h 25m

London Heathrow

Thu 10/9

6:15 am-3:00 pm

1 stop13h 45m

$485

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 10/3

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Mon 10/6

3:40 pm-7:20 pm

1 stop32h 40m

$488

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 9/30

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Sun 10/12

3:40 pm-10:10 pm

1 stop11h 30m

$489

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 11/18

6:00 pm-10:50 am

1 stop11h 50m

London Gatwick

Wed 12/3

11:45 am-4:30 pm

1 stop33h 45m

$513

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

Tue 11/4

5:29 pm-6:00 pm

2 stops19h 31m

Inverness

Fri 11/14

8:30 pm-7:21 pm

2 stops27h 51m

$529

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Mon 10/13

4:35 pm-6:35 pm

1 stop21h 00m

Manchester

Wed 10/22

7:15 pm-3:00 pm

1 stop24h 45m

$599

Flights are sorted by cheapest round-trip 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. 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?

In general, January is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $619. If you aren’t able to travel to United Kingdom during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $624.

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 when prices can be found for as low as $755. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $899.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the morning. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to United Kingdom in the morning for as low as $748. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the afternoon, with an average ticket price of $824. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $758 when searching weeks out. 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 $685 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 59% 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

$211

Fastest flight time

7h 10m

Direct flights

Every day

Airports in United Kingdom

8 airports
The best one-way flight to United Kingdom from Washington, D.C. Dulles Intl Airport in the past 72 hours is $211. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to United Kingdom found on momondo in the last 72 hours is $410.
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 8 airports near United Kingdom: London City (LCY), London Heathrow (LHR), London Luton (LTN), 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?

    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. Dulles Intl Airport to United Kingdom.

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

    The required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable 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 $311Free CancellationRating
6.8
7,289 reviews
Search Lufthansa flights
PLAYPriceFrom $313Free CancellationRating
7.0
102 reviews
Search PLAY flights
Scandinavian AirlinesPriceFrom $409Free CancellationRating
7.4
1,463 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $433Free CancellationRating
7.0
524 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $441Free CancellationRating
7.1
1,942 reviews
Search TAP AIR PORTUGAL flights
Virgin AtlanticPriceFrom $536Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
Air CanadaPriceFrom $549Free CancellationRating
7.1
9,893 reviews
Search Air Canada flights
Aer LingusPriceFrom $557Free CancellationRating
7.1
1,201 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $558Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $565Free CancellationRating
6.6
7,245 reviews
Search British Airways flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to United Kingdom. momondo saves you time and could save you money on your trip.

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?

Yes. momondo can track prices for Washington, D.C. to United Kingdom flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in the United Kingdom

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