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Cheap flights from Washington, D.C. Reagan-National Airport to London from $345

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 2/7. 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
12:55 pm - 7:10 am
DCA
-
LHR
13h 15m
2 stops
Multiple Airlines Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
$594Multiple Airlines
Wed, Feb 18 - Fri, Mar 6
Multiple Airlines Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m
1 stop
Multiple Airlines Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
$595Multiple Airlines
Wed, Feb 18 - Fri, Mar 6
Multiple Airlines Logo
6:00 am - 7:10 am
DCA
-
LHR
20h 10m
1 stop
Multiple Airlines Logo
6:50 am - 9:56 pm
LHR
-
DCA
19h 06m
2 stops
$602Multiple Airlines
Fri, Mar 6 - Sat, Mar 14
Multiple Airlines Logo
9:40 am - 11:20 am
DCA
-
LHR
20h 40m
1 stop
Multiple Airlines Logo
6:50 am - 9:56 pm
LHR
-
DCA
19h 06m
2 stops
$603Multiple Airlines
Thu, Mar 5 - Thu, Mar 12
Air Canada Logo
6:00 am - 9:20 am
DCA
-
LHR
23h 20m
2 stops
Air Canada Logo
6:50 am - 9:56 pm
LHR
-
DCA
19h 06m
2 stops
$606Air Canada
Wed, Mar 11 - Mon, Mar 16
Air Canada Logo
6:00 am - 7:10 am
DCA
-
LHR
21h 10m
1 stop
Air Canada Logo
6:50 am - 9:56 pm
LHR
-
DCA
19h 06m
2 stops
$609Air Canada
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
4:10 pm - 7:10 am
DCA
-
LHR
10h 00m
1 stop
Multiple Airlines Logo
10:30 am - 8:55 am
LHR
-
DCA
26h 25m
2 stops
$614Multiple Airlines
Fri, Mar 6 - Sun, Mar 15
Multiple Airlines Logo
4:10 pm - 9:20 am
DCA
-
LHR
12h 10m
2 stops
Multiple Airlines Logo
10:30 am - 8:55 am
LHR
-
DCA
26h 25m
2 stops
$616Multiple Airlines
Fri, Mar 6 - Sun, Mar 15
Air Canada Logo
4:15 pm - 7:10 am
DCA
-
LHR
9h 55m
1 stop
Air Canada Logo
1:25 pm - 9:56 pm
LHR
-
DCA
13h 31m
1 stop
$619Air Canada
Sun, Feb 22 - Tue, Mar 3
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

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
United Airlines
Feb 28
DCA5:05 pmWashington, D.C. Reagan-National
31h 50m
1 stop
LHR5:55 amLondon Heathrow
Mar 10
LHR1:25 pmLondon Heathrow
24h 56m
1 stop
DCA10:21 amWashington, D.C. Reagan-National
$639
United Airlines
Mar 21
DCA6:00 amWashington, D.C. Reagan-National
11h 20m
1 stop
LHR9:20 pmLondon Heathrow
Mar 24
LHR1:25 pmLondon Heathrow
26h 53m
2 stops
DCA12:18 pmWashington, D.C. Reagan-National
$642
United Airlines
Mar 13
DCA7:00 amWashington, D.C. Reagan-National
9h 35m
1 stop
LHR8:35 pmLondon Heathrow
Mar 19
LHR1:25 pmLondon Heathrow
12h 31m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
$650

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
Mar 11
DCA6:00 amWashington, D.C. Reagan-National
23h 20m
2 stops
LHR9:20 amLondon Heathrow
Mar 16
LHR6:50 amLondon Heathrow
19h 06m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
$606
Air Canada
Mar 11
DCA6:00 amWashington, D.C. Reagan-National
21h 10m
1 stop
LHR7:10 amLondon Heathrow
Mar 16
LHR6:50 amLondon Heathrow
19h 06m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
$609
Air Canada
Feb 22
DCA4:15 pmWashington, D.C. Reagan-National
9h 55m
1 stop
LHR7:10 amLondon Heathrow
Mar 3
LHR1:25 pmLondon Heathrow
13h 31m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
$619

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 February 4, 2026.
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

Wed 2/18

12:55 pm-7:10 am

2 stops13h 15m

London Heathrow

Fri 3/6

6:50 am-3:31 pm

2 stops13h 41m

$594

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 2/18

12:55 pm-9:20 am

1 stop15h 25m

London Heathrow

Fri 3/6

6:50 am-3:31 pm

2 stops13h 41m

$595

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 3/6

6:00 am-7:10 am

1 stop20h 10m

London Heathrow

Sat 3/14

6:50 am-9:56 pm

2 stops19h 06m

$602

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 3/5

9:40 am-11:20 am

1 stop20h 40m

London Heathrow

Thu 3/12

6:50 am-9:56 pm

2 stops19h 06m

$603

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 3/11

6:00 am-9:20 am

2 stops23h 20m

London Heathrow

Mon 3/16

6:50 am-9:56 pm

2 stops19h 06m

$606

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 3/11

6:00 am-7:10 am

1 stop21h 10m

London Heathrow

Mon 3/16

6:50 am-9:56 pm

2 stops19h 06m

$609

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 3/6

4:10 pm-7:10 am

1 stop10h 00m

London Heathrow

Sun 3/15

10:30 am-8:55 am

2 stops26h 25m

$614

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 3/6

4:10 pm-9:20 am

2 stops12h 10m

London Heathrow

Sun 3/15

10:30 am-8:55 am

2 stops26h 25m

$616

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 2/22

4:15 pm-7:10 am

1 stop9h 55m

London Heathrow

Tue 3/3

1:25 pm-9:56 pm

1 stop13h 31m

$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

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 October is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C. Reagan-National Airport, with most prices found around $639. If you’re not able to fly to London Heathrow Airport in October, then November is your next best option. Flight prices from Washington, D.C. Reagan-National Airport to London Heathrow Airport during November average around $644.

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 $757. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $886.

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 $806. 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 $814.

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 $785 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 $655 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 5% 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 February 2026, 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 01m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 01m
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 01m.

  • 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
2,893 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom $497Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom $497Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights
British AirwaysPriceFrom $529Free CancellationRating
6.7
7,714 reviews
Search British Airways flights
DeltaPriceFrom $558Free CancellationRating
7.9
8,141 reviews
Search Delta flights
IberiaPriceFrom $562Free CancellationRating
7.0
3,104 reviews
Search Iberia flights
United AirlinesPriceFrom $598Free CancellationRating
7.4
9,235 reviews
Search United Airlines flights
Air CanadaPriceFrom $633Free CancellationRating
7.1
10,687 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
Luton
Dover
Slough
Guildford
Crawley
Wembley
Dartford
Stratford-upon-Avon
Hayes
Croydon
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted

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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