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Cheap flights from London Heathrow Airport to Washington, D.C. from $449

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Washington, D.C. departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London Heathrow Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
6:50 am - 3:24 pm
LHR
-
DCA
13h 34m
2 stops
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m
1 stop
$587Air Canada
Wed, Nov 11 - Thu, Nov 19
Air Canada Logo
6:50 am - 3:24 pm
LHR
-
DCA
13h 34m
2 stops
Air Canada Logo
11:05 am - 8:30 am
DCA
-
LHR
16h 25m
2 stops
$598Air Canada
Wed, Nov 11 - Thu, Nov 19
Air Canada Logo
6:00 am - 9:59 pm
LHR
-
DCA
20h 59m
2 stops
Air Canada Logo
6:00 am - 7:10 am
DCA
-
LHR
20h 10m
1 stop
$612Air Canada
Sun, Nov 22 - Sun, Nov 29
Air Canada Logo
9:00 am - 7:58 pm
LHR
-
DCA
15h 58m
2 stops
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
15h 05m
1 stop
$615Air Canada
Thu, Nov 19 - Sun, Nov 29
Air Canada Logo
1:00 pm - 9:59 pm
LHR
-
DCA
13h 59m
1 stop
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m
1 stop
$617Air Canada
Wed, Nov 11 - Thu, Nov 19
Air Canada Logo
9:00 am - 7:58 pm
LHR
-
DCA
15h 58m
2 stops
Air Canada Logo
12:55 pm - 11:20 am
DCA
-
LHR
17h 25m
2 stops
$620Air Canada
Sun, Nov 22 - Sun, Nov 29
Air Canada Logo
2:05 pm - 9:48 pm
LHR
-
DCA
12h 43m
1 stop
Air Canada Logo
4:20 pm - 10:00 am
DCA
-
LHR
12h 40m
1 stop
$621Air Canada
Thu, Aug 20 - Wed, Aug 26
Air Canada Logo
9:00 am - 7:58 pm
LHR
-
DCA
15h 58m
2 stops
Air Canada Logo
4:00 pm - 11:20 am
DCA
-
LHR
14h 20m
2 stops
$623Air Canada
Thu, Nov 19 - Sun, Nov 29
Air Canada Logo
9:00 am - 7:58 pm
LHR
-
DCA
15h 58m
2 stops
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
15h 05m
1 stop
$626Air Canada
Wed, Jan 6 - Wed, Jan 20
British Airways Logo
5:25 pm - 11:10 pm
LHR
-
DCA
10h 45m
1 stop
British Airways Logo
5:18 pm - 7:50 am
DCA
-
LHR
9h 32m
1 stop
$630British Airways
Wed, Sep 23 - Sun, Sep 27

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

Our best Air Canada deals on London Heathrow Airport to Washington, D.C. Reagan-National Airport flight tickets
Air Canada
Nov 11
LHR6:50 amLondon Heathrow
13h 34m
2 stops
DCA3:24 pmWashington, D.C. Reagan-National
Nov 19
DCA12:55 pmWashington, D.C. Reagan-National
15h 25m
1 stop
LHR9:20 amLondon Heathrow
$587
Air Canada
Nov 11
LHR6:50 amLondon Heathrow
13h 34m
2 stops
DCA3:24 pmWashington, D.C. Reagan-National
Nov 19
DCA11:05 amWashington, D.C. Reagan-National
16h 25m
2 stops
LHR8:30 amLondon Heathrow
$598
Air Canada
Nov 22
LHR6:00 amLondon Heathrow
20h 59m
2 stops
DCA9:59 pmWashington, D.C. Reagan-National
Nov 29
DCA6:00 amWashington, D.C. Reagan-National
20h 10m
1 stop
LHR7:10 amLondon Heathrow
$612

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

Our best United Airlines deals on London Heathrow Airport to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Sep 10
LHR6:50 amLondon Heathrow
15h 08m
2 stops
DCA4:58 pmWashington, D.C. Reagan-National
Sep 16
DCA10:30 amWashington, D.C. Reagan-National
17h 00m
1 stop
LHR8:30 amLondon Heathrow
$639
United Airlines
Sep 10
LHR2:05 pmLondon Heathrow
30h 35m
1 stop
DCA3:40 pmWashington, D.C. Reagan-National
Sep 12
DCA2:59 pmWashington, D.C. Reagan-National
25h 21m
1 stop
LHR9:20 pmLondon Heathrow
$646
United Airlines
Aug 28
LHR2:05 pmLondon Heathrow
12h 43m
1 stop
DCA9:48 pmWashington, D.C. Reagan-National
Sep 4
DCA6:00 amWashington, D.C. Reagan-National
9h 40m
1 stop
LHR8:40 pmLondon Heathrow
$662

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Washington, D.C. Reagan-National 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 July 23, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 11/11

6:50 am-3:24 pm

2 stops13h 34m

Washington, D.C. Reagan-National

Thu 11/19

12:55 pm-9:20 am

1 stop15h 25m

$587

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 11/11

6:50 am-3:24 pm

2 stops13h 34m

Washington, D.C. Reagan-National

Thu 11/19

11:05 am-8:30 am

2 stops16h 25m

$598

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sun 11/22

6:00 am-9:59 pm

2 stops20h 59m

Washington, D.C. Reagan-National

Sun 11/29

6:00 am-7:10 am

1 stop20h 10m

$612

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 11/19

9:00 am-7:58 pm

2 stops15h 58m

Washington, D.C. Reagan-National

Sun 11/29

11:05 am-7:10 am

1 stop15h 05m

$615

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 11/11

1:00 pm-9:59 pm

1 stop13h 59m

Washington, D.C. Reagan-National

Thu 11/19

12:55 pm-9:20 am

1 stop15h 25m

$617

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sun 11/22

9:00 am-7:58 pm

2 stops15h 58m

Washington, D.C. Reagan-National

Sun 11/29

12:55 pm-11:20 am

2 stops17h 25m

$620

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 8/20

2:05 pm-9:48 pm

1 stop12h 43m

Washington, D.C. Reagan-National

Wed 8/26

4:20 pm-10:00 am

1 stop12h 40m

$621

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 11/19

9:00 am-7:58 pm

2 stops15h 58m

Washington, D.C. Reagan-National

Sun 11/29

4:00 pm-11:20 am

2 stops14h 20m

$623

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 1/6

9:00 am-7:58 pm

2 stops15h 58m

Washington, D.C. Reagan-National

Wed 1/20

11:05 am-7:10 am

1 stop15h 05m

$626
Quickest round-trip

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 9/23

5:25 pm-11:10 pm

1 stop10h 45m

Washington, D.C. Reagan-National

Sun 9/27

5:18 pm-7:50 am

1 stop9h 32m

$630

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 Washington, D.C. from

How to get the cheapest flight ticket from London Heathrow Airport to Washington, D.C. Reagan-National 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 typical price of a round-trip flight between London Heathrow Airport and Washington, D.C. Reagan-National Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $670 to $811.
The lowest price recently found on this route was $587.

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of February is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from London Heathrow Airport, with most prices found around $583. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $599.

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

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

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

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

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

Fastest flight time

10h 45m

Direct flights

None
The fastest flight from London Heathrow Airport to Washington, D.C. Reagan-National Airport takes 10h 45m
There are no direct flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport. There are no popular flight routes from London Heathrow Airport to Washington, D.C. Reagan-National Airport.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Washington, D.C. Reagan-National Airport

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

    Washington, D.C. Reagan-National is 3651.9 mi away from London Heathrow. Flights usually cover this in 10h 45m, depending on flying conditions and air traffic around both airports.

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The travel and health documents required for your trip to Washington, D.C. Reagan-National Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Reagan-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Manassas
Towson
Silver Spring
Colonial Beach
Springfield
Tysons
Fairfax
College Park
Edgewood

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Washington, D.C. for you.

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

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

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

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

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

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.

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