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Cheap flights from Washington, D.C. to the United Kingdom from $193

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 3/20. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
8:30 pm - 11:55 am
IAD
-
LHR
10h 25m
1 stop
Icelandair Logo
1:05 pm - 7:20 pm
LHR
-
IAD
11h 15m
1 stop
$522Icelandair
Tue, Apr 21 - Thu, Apr 30
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
$523Icelandair
Sun, Feb 15 - Sun, Feb 22
Icelandair Logo
8:30 pm - 11:55 am
IAD
-
LHR
10h 25m
1 stop
Icelandair Logo
1:05 pm - 7:20 pm
LHR
-
IAD
11h 15m
1 stop
$523Icelandair
Thu, Apr 16 - Tue, Apr 21
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
16h 25m
1 stop
Air Canada Logo
1:25 pm - 9:56 pm
LHR
-
DCA
12h 31m
1 stop
$611Air Canada
Wed, Mar 18 - Wed, Mar 25
British Airways Logo
11:35 am - 7:30 am
DCA
-
LGW
14h 55m
1 stop
British Airways Logo
11:20 am - 11:45 pm
LGW
-
DCA
16h 25m
1 stop
$619British Airways
Wed, Mar 4 - Wed, Mar 11
Air Canada Logo
4:10 pm - 7:10 am
DCA
-
LHR
10h 00m
1 stop
Air Canada Logo
11:10 am - 7:45 pm
LHR
-
DCA
12h 35m
1 stop
$621Air Canada
Thu, Mar 5 - Sun, Mar 8
Virgin Atlantic Logo
6:05 pm - 8:50 am
IAD
-
LCY
9h 45m
1 stop
Virgin Atlantic Logo
10:00 am - 4:05 pm
LCY
-
IAD
11h 05m
1 stop
$633Virgin Atlantic
Mon, Feb 16 - Wed, Feb 25
Virgin Atlantic Logo
6:05 pm - 6:25 pm
IAD
-
LCY
19h 20m
1 stop
Virgin Atlantic Logo
8:05 pm - 5:05 pm
LCY
-
IAD
25h 00m
1 stop
$636Virgin Atlantic
Wed, Mar 4 - Mon, Mar 9
Scandinavian Airlines Logo
8:20 pm - 4:15 pm
IAD
-
EDI
14h 55m
2 stops
Scandinavian Airlines Logo
7:10 pm - 4:50 pm
EDI
-
IAD
26h 40m
1 stop
$646Scandinavian Airlines
Sun, Apr 26 - Tue, May 5
Scandinavian Airlines Logo
8:20 pm - 4:15 pm
IAD
-
EDI
38h 55m
2 stops
Scandinavian Airlines Logo
7:10 pm - 4:50 pm
EDI
-
IAD
26h 40m
1 stop
$647Scandinavian Airlines
Sat, Apr 25 - Wed, May 6

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

Our best Icelandair deals on Washington, D.C. to United Kingdom flight tickets
Icelandair
Apr 21
IAD8:30 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
LHR11:55 amLondon Heathrow
Apr 30
LHR1:05 pmLondon Heathrow
11h 15m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$522
Icelandair
Apr 16
IAD8:30 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
LHR11:55 amLondon Heathrow
Apr 21
LHR1:05 pmLondon Heathrow
11h 15m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$523
Icelandair
Apr 16
IAD8:30 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
LHR11:55 amLondon Heathrow
Apr 19
LHR9:25 pmLondon Heathrow
26h 55m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$524

Scandinavian Airlines flights from Washington, D.C. to United Kingdom

Our best Scandinavian Airlines deals on Washington, D.C. to United Kingdom flight tickets
Scandinavian Airlines
Feb 25
IAD8:30 pmWashington, D.C. Dulles Intl
17h 00m
1 stop
LHR6:30 pmLondon Heathrow
Mar 4
LHR7:05 amLondon Heathrow
15h 10m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
$557
Scandinavian Airlines
Apr 22
IAD8:20 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
LHR5:40 pmLondon Heathrow
Apr 26
LHR10:20 amLondon Heathrow
11h 30m
1 stop
IAD4:50 pmWashington, D.C. Dulles Intl
$560
Scandinavian Airlines
May 1
IAD8:20 pmWashington, D.C. Dulles Intl
32h 00m
1 stop
LHR9:20 amLondon Heathrow
May 4
LHR6:40 amLondon Heathrow
15h 10m
2 stops
IAD4:50 pmWashington, D.C. Dulles Intl
$561

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated February 3, 2026.
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 - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 4/21

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

Thu 4/30

1:05 pm-7:20 pm

1 stop11h 15m

$522

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 2/15

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sun 2/22

11:55 am-6:30 pm

1 stop11h 35m

$523

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 4/16

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

Tue 4/21

1:05 pm-7:20 pm

1 stop11h 15m

$523

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 3/18

12:55 pm-9:20 am

1 stop16h 25m

London Heathrow

Wed 3/25

1:25 pm-9:56 pm

1 stop12h 31m

$611

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 3/4

11:35 am-7:30 am

1 stop14h 55m

London Gatwick

Wed 3/11

11:20 am-11:45 pm

1 stop16h 25m

$619

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 3/5

4:10 pm-7:10 am

1 stop10h 00m

London Heathrow

Sun 3/8

11:10 am-7:45 pm

1 stop12h 35m

$621

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mon 2/16

6:05 pm-8:50 am

1 stop9h 45m

London City

Wed 2/25

10:00 am-4:05 pm

1 stop11h 05m

$633

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 3/4

6:05 pm-6:25 pm

1 stop19h 20m

London City

Mon 3/9

8:05 pm-5:05 pm

1 stop25h 00m

$636

Washington, D.C.Edinburgh

IAD - EDI

IADEDI

Washington, D.C. Dulles Intl

Sun 4/26

8:20 pm-4:15 pm

2 stops14h 55m

Edinburgh Turnhouse

Tue 5/5

7:10 pm-4:50 pm

1 stop26h 40m

$646

Washington, D.C.Edinburgh

IAD - EDI

IADEDI

Washington, D.C. Dulles Intl

Sat 4/25

8:20 pm-4:15 pm

2 stops38h 55m

Edinburgh Turnhouse

Wed 5/6

7:10 pm-4:50 pm

1 stop26h 40m

$647

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. 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, September is the cheapest month to fly from Washington, D.C. to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $628. If you aren’t able to travel to United Kingdom during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $642.

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 when prices can be found for as low as $757. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $885.

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 afternoon. momondo users have found flights departing from Washington, D.C. to United Kingdom in the afternoon for as low as $807. 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 evening, with an average ticket price of $813. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

Fly from Baltimore/Washington 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 $754 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. for as low as $706 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 33% 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

$374

Fastest flight time

7h 05m

Direct flights

Mon, Wed, Thu, Fri, Sat and Sun

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from Washington, D.C. in the past 72 hours is $374. The best round-trip flight deal from Washington, D.C. to United Kingdom found on momondo in the last 72 hours is $656.
The fastest flight from Washington, D.C. to United Kingdom takes 7h 05m
Direct flights go from Washington, D.C. to United Kingdom on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is British Airways.
There are 1,286 airports in United Kingdom. From Washington, D.C. there are direct flights to London Heathrow (LHR).
Search flight deals

  • 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 are refreshed on a daily basis.

  • 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 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. 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
JetBluePriceFrom $31Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights
LufthansaPriceFrom $311Free CancellationRating
6.8
7,758 reviews
Search Lufthansa flights
PLAYPriceFrom $374Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom $411Free CancellationRating
7.1
2,133 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $415Free CancellationRating
7.1
606 reviews
Search Icelandair flights
Air FrancePriceFrom $442Free CancellationRating
7.4
1,531 reviews
Search Air France flights
Scandinavian AirlinesPriceFrom $454Free CancellationRating
7.3
1,676 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $462Free CancellationRating
7.4
9,235 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $471Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
KLMPriceFrom $488Free CancellationRating
7.7
1,448 reviews
Search KLM flights

Why use momondo?

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

It is quick and easy to find Washington, D.C. to United Kingdom flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to United Kingdom that suits you.

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

momondo does allow users to show only those flights to United Kingdom from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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?

Price alerts on flights to United Kingdom from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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
Flights to Londonfrom $323
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Flights to Bristolfrom $510
Flights to Invernessfrom $423
Flights to Liverpoolfrom $393
Flights to Aberdeenfrom $492
Flights to Leedsfrom $451