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Cheap flights from London Heathrow Airport to Washington, D.C. from $486

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 4/19. 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 London Heathrow Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:25 pm - 11:41 pm
LHR
-
DCA
15h 16m
1 stop
Delta Logo
11:48 am - 6:45 am
DCA
-
LHR
13h 57m
1 stop
$540Delta
Thu, Apr 23 - Thu, Apr 30
Multiple Airlines Logo
9:00 am - 9:56 pm
LHR
-
DCA
16h 56m
2 stops
Multiple Airlines Logo
12:55 pm - 9:20 am
DCA
-
LHR
16h 25m
1 stop
$543Multiple Airlines
Wed, Mar 11 - Wed, Mar 18
Air Canada Logo
9:00 am - 9:56 pm
LHR
-
DCA
16h 56m
2 stops
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
16h 25m
1 stop
$544Air Canada
Wed, Mar 11 - Wed, Mar 18
Air Canada Logo
9:00 am - 9:56 pm
LHR
-
DCA
16h 56m
2 stops
Air Canada Logo
12:55 pm - 7:10 am
DCA
-
LHR
14h 15m
2 stops
$546Air Canada
Thu, Mar 12 - Mon, Mar 16
Air Canada Logo
9:00 am - 9:56 pm
LHR
-
DCA
16h 56m
2 stops
Air Canada Logo
12:55 pm - 7:10 am
DCA
-
LHR
14h 15m
2 stops
$547Air Canada
Wed, Mar 11 - Mon, Mar 23
Air Canada Logo
9:00 am - 7:59 pm
LHR
-
DCA
15h 59m
2 stops
Air Canada Logo
12:55 pm - 8:35 am
DCA
-
LHR
14h 40m
1 stop
$549Air Canada
Wed, Feb 25 - Wed, Apr 29
Air Canada Logo
9:00 am - 10:35 pm
LHR
-
DCA
17h 35m
2 stops
Air Canada Logo
12:55 pm - 7:10 am
DCA
-
LHR
14h 15m
2 stops
$552Air Canada
Mon, Mar 9 - Mon, Mar 16
Air Canada Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
15h 05m
1 stop
$553Air Canada
Thu, Feb 26 - Thu, Mar 5
Air Canada Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
Air Canada Logo
4:10 pm - 7:10 am
DCA
-
LHR
11h 00m
1 stop
$554Air Canada
Wed, Mar 4 - Wed, Mar 11
Air Canada Logo
6:50 am - 3:31 pm
LHR
-
DCA
13h 41m
2 stops
Air Canada Logo
12:55 pm - 7:10 am
DCA
-
LHR
14h 15m
2 stops
$555Air Canada
Thu, Mar 5 - Mon, Mar 16

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
Mar 3
LHR1:25 pmLondon Heathrow
13h 31m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
Mar 8
DCA2:00 pmWashington, D.C. Reagan-National
11h 55m
1 stop
LHR5:55 amLondon Heathrow
$582
United Airlines
Mar 1
LHR8:00 amLondon Heathrow
11h 33m
1 stop
DCA2:33 pmWashington, D.C. Reagan-National
Mar 26
DCA7:00 amWashington, D.C. Reagan-National
9h 35m
1 stop
LHR8:35 pmLondon Heathrow
$583
United Airlines
Feb 21
LHR3:00 pmLondon Heathrow
11h 56m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
Feb 28
DCA6:00 amWashington, D.C. Reagan-National
10h 20m
1 stop
LHR9:20 pmLondon Heathrow
$585

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
Mar 3
LHR1:45 pmLondon Heathrow
37h 11m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
Mar 8
DCA12:55 pmWashington, D.C. Reagan-National
16h 25m
1 stop
LHR9:20 amLondon Heathrow
$537
Air Canada
Mar 11
LHR9:00 amLondon Heathrow
16h 56m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
Mar 18
DCA12:55 pmWashington, D.C. Reagan-National
16h 25m
1 stop
LHR9:20 amLondon Heathrow
$544
Air Canada
Mar 3
LHR6:50 amLondon Heathrow
20h 06m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
Mar 8
DCA12:55 pmWashington, D.C. Reagan-National
15h 35m
2 stops
LHR8:30 amLondon Heathrow
$545

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 February 10, 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

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 4/23

1:25 pm-11:41 pm

1 stop15h 16m

Washington, D.C. Reagan-National

Thu 4/30

11:48 am-6:45 am

1 stop13h 57m

$540

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 3/11

9:00 am-9:56 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Wed 3/18

12:55 pm-9:20 am

1 stop16h 25m

$543

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 3/11

9:00 am-9:56 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Wed 3/18

12:55 pm-9:20 am

1 stop16h 25m

$544

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 3/12

9:00 am-9:56 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Mon 3/16

12:55 pm-7:10 am

2 stops14h 15m

$546

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 3/11

9:00 am-9:56 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Mon 3/23

12:55 pm-7:10 am

2 stops14h 15m

$547

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 2/25

9:00 am-7:59 pm

2 stops15h 59m

Washington, D.C. Reagan-National

Wed 4/29

12:55 pm-8:35 am

1 stop14h 40m

$549

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 3/9

9:00 am-10:35 pm

2 stops17h 35m

Washington, D.C. Reagan-National

Mon 3/16

12:55 pm-7:10 am

2 stops14h 15m

$552

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 2/26

6:50 am-3:31 pm

2 stops13h 41m

Washington, D.C. Reagan-National

Thu 3/5

11:05 am-7:10 am

1 stop15h 05m

$553

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 3/4

6:50 am-3:31 pm

2 stops13h 41m

Washington, D.C. Reagan-National

Wed 3/11

4:10 pm-7:10 am

1 stop11h 00m

$554

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 3/5

6:50 am-3:31 pm

2 stops13h 41m

Washington, D.C. Reagan-National

Mon 3/16

12:55 pm-7:10 am

2 stops14h 15m

$555

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

The month of January is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from London Heathrow Airport, with most prices found around $627. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $643.

How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $767 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from London Heathrow Airport for as low as $634 on momondo.

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

11h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Washington, D.C. Reagan-National Airport takes 11h 00m
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

  • 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 11h 00m, 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
Gettysburg
Arlington
Waldorf
Woodbridge
Laurel
Colonial Beach
Tysons
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
Glen Burnie

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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