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Cheap flights from Washington, D.C. Reagan-National Airport to London from $379

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. Reagan-National Airport to London departing on 1/31. 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. Reagan-National Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:15 pm - 7:10 am
DCA
-
LHR
9h 55m1 stop
Multiple Airlines Logo
6:50 am - 3:33 pm
LHR
-
DCA
13h 43m2 stops
$587Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
10h 45m1 stop
JetBlue Logo
12:20 pm - 10:59 pm
LHR
-
DCA
14h 39m1 stop
$589JetBlue
Mon, Mar 9 - Thu, Mar 12
Multiple Airlines Logo
12:55 pm - 7:10 am
DCA
-
LHR
13h 15m2 stops
Multiple Airlines Logo
6:50 am - 3:33 pm
LHR
-
DCA
13h 43m2 stops
$592Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
9h 45m1 stop
JetBlue Logo
9:20 am - 4:19 pm
LHR
-
DCA
11h 59m1 stop
$595JetBlue
Fri, Jan 16 - Fri, Jan 23
Multiple Airlines Logo
4:15 pm - 7:10 am
DCA
-
LHR
9h 55m1 stop
Multiple Airlines Logo
6:50 am - 3:33 pm
LHR
-
DCA
13h 43m2 stops
$600Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m1 stop
Air Canada Logo
9:00 am - 7:45 pm
LHR
-
DCA
15h 45m2 stops
$608Air Canada
Sun, Jan 11 - Fri, Jan 16
Air Canada Logo
12:55 pm - 7:10 am
DCA
-
LHR
13h 15m2 stops
Air Canada Logo
9:00 am - 7:45 pm
LHR
-
DCA
15h 45m2 stops
$611Air Canada
Sun, Jan 11 - Fri, Jan 16
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
9h 45m1 stop
JetBlue Logo
9:20 am - 5:34 pm
LHR
-
DCA
13h 14m1 stop
$614JetBlue
Mon, Jan 12 - Fri, Jan 23
Multiple Airlines Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m1 stop
Multiple Airlines Logo
10:30 am - 8:55 am
LHR
-
DCA
27h 25m2 stops
$615Multiple Airlines
Wed, Jan 21 - Sat, Jan 31
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
15h 05m1 stop
Air Canada Logo
6:50 am - 3:33 pm
LHR
-
DCA
13h 43m2 stops
$616Air Canada
Tue, Feb 17 - Wed, Feb 25

JetBlue flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Our best JetBlue deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
JetBlue
Mar 9
DCA6:00 amWashington, D.C. Reagan-National
10h 45m
1 stop
LHR8:45 pmLondon Heathrow
Mar 12
LHR12:20 pmLondon Heathrow
14h 39m
1 stop
DCA10:59 pmWashington, D.C. Reagan-National
$589
Find similar
JetBlue
Jan 16
DCA6:00 amWashington, D.C. Reagan-National
9h 45m
1 stop
LHR8:45 pmLondon Heathrow
Jan 23
LHR9:20 amLondon Heathrow
11h 59m
1 stop
DCA4:19 pmWashington, D.C. Reagan-National
$595
Find similar
JetBlue
Jan 12
DCA6:00 amWashington, D.C. Reagan-National
9h 45m
1 stop
LHR8:45 pmLondon Heathrow
Jan 23
LHR9:20 amLondon Heathrow
13h 14m
1 stop
DCA5:34 pmWashington, D.C. Reagan-National
$614
Find similar

Air Canada flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Our best Air Canada deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
Air Canada
Jan 11
DCA12:55 pmWashington, D.C. Reagan-National
15h 25m
1 stop
LHR9:20 amLondon Heathrow
Jan 16
LHR9:00 amLondon Heathrow
15h 45m
2 stops
DCA7:45 pmWashington, D.C. Reagan-National
$608
Find similar
Air Canada
Jan 11
DCA12:55 pmWashington, D.C. Reagan-National
13h 15m
2 stops
LHR7:10 amLondon Heathrow
Jan 16
LHR9:00 amLondon Heathrow
15h 45m
2 stops
DCA7:45 pmWashington, D.C. Reagan-National
$611
Find similar
Air Canada
Feb 17
DCA12:55 pmWashington, D.C. Reagan-National
13h 15m
2 stops
LHR7:10 amLondon Heathrow
Feb 25
LHR6:50 amLondon Heathrow
13h 43m
2 stops
DCA3:33 pmWashington, D.C. Reagan-National
$616
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport 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 December 21, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 2/3

4:15 pm-7:10 am

1 stop9h 55m

London Heathrow

Tue 2/10

6:50 am-3:33 pm

2 stops13h 43m

$587

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 3/9

6:00 am-8:45 pm

1 stop10h 45m

London Heathrow

Thu 3/12

12:20 pm-10:59 pm

1 stop14h 39m

$589

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 2/3

12:55 pm-7:10 am

2 stops13h 15m

London Heathrow

Tue 2/10

6:50 am-3:33 pm

2 stops13h 43m

$592

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 1/16

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Fri 1/23

9:20 am-4:19 pm

1 stop11h 59m

$595

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 2/3

4:15 pm-7:10 am

1 stop9h 55m

London Heathrow

Tue 2/10

6:50 am-3:33 pm

2 stops13h 43m

$600

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 1/11

12:55 pm-9:20 am

1 stop15h 25m

London Heathrow

Fri 1/16

9:00 am-7:45 pm

2 stops15h 45m

$608

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 1/11

12:55 pm-7:10 am

2 stops13h 15m

London Heathrow

Fri 1/16

9:00 am-7:45 pm

2 stops15h 45m

$611

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 1/12

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Fri 1/23

9:20 am-5:34 pm

1 stop13h 14m

$614

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 1/21

12:55 pm-9:20 am

1 stop15h 25m

London Heathrow

Sat 1/31

10:30 am-8:55 am

2 stops27h 25m

$615

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 2/17

11:05 am-7:10 am

1 stop15h 05m

London Heathrow

Wed 2/25

6:50 am-3:33 pm

2 stops13h 43m

$616

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 London from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to London Heathrow Airport

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 London Heathrow Airport?

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C. Reagan-National Airport, with most prices found around $579. If you’re not able to fly to London Heathrow Airport in January, then October is your next best option. Flight prices from Washington, D.C. Reagan-National Airport to London Heathrow Airport during October average around $639.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $760. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $893.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Washington, D.C. Reagan-National Airport to London Heathrow Airport in the afternoon for as low as $810. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $811.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $760 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Washington, D.C. Reagan-National Airport for as low as $625 on momondo.

Can stopping save me money on Washington, D.C. Reagan-National Airport to London Heathrow Airport flights?

You could potentially save up to 4% on your flight if you consider stops on a Washington, D.C. Reagan-National Airport to London Heathrow Airport flight.

How have Washington, D.C. Reagan-National Airport to London Heathrow Airport flight prices changed over time?

As of December 2025, prices for Washington, D.C. Reagan-National Airport to London Heathrow Airport flights are approximately 42% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to London Heathrow Airport (DCA to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Fastest flight time

9h 15m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 15m
There are no direct flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport. There are no popular flight routes from Washington, D.C. Reagan-National Airport to London Heathrow Airport.
Search flight deals

  • How far is Washington, D.C. Reagan-National to London Heathrow by plane?

    The straight-line distance from Washington, D.C. Reagan-National to London Heathrow is 3651.9 mi. A reasonable flight in good conditions will take 9h 15m.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

    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. Reagan-National Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The required travel and health documents for your London Heathrow Airport 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 London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

Best airlines flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $31Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom $497Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom $497Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
British AirwaysPriceFrom $529Free CancellationRating
6.7
7,602 reviews
Search British Airways flights
DeltaPriceFrom $558Free CancellationRating
7.9
8,013 reviews
Search Delta flights
IberiaPriceFrom $562Free CancellationRating
7.0
3,055 reviews
Search Iberia flights
United AirlinesPriceFrom $598Free CancellationRating
7.4
9,102 reviews
Search United Airlines flights
Air CanadaPriceFrom $632Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Stratford-upon-Avon
Crawley
Brentwood
Salisbury
Wembley
Watford
Ilford
Cobham
Folkestone
Romford
Richmond

Why use momondo?

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

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 London from Washington, D.C..

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

Yes. All flights to London from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Washington, D.C. to London 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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