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Cheap flights from London Heathrow Airport to Washington, D.C. from $572

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 1/20. 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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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.
JetBlue Logo
9:20 am - 4:04 pm
LHR
-
DCA
11h 44m1 stop
JetBlue Logo
6:00 am - 9:40 pm
DCA
-
LHR
10h 40m1 stop
$625JetBlue
Thu, Feb 19 - Wed, Feb 25
United Airlines Logo
12:00 pm - 12:19 pm
LHR
-
DCA
29h 19m1 stop
United Airlines Logo
3:30 pm - 7:55 am
DCA
-
LHR
11h 25m1 stop
$626United Airlines
Wed, Dec 17 - Wed, Jan 7
Air Canada Logo
2:05 pm - 12:01 pm
LHR
-
DCA
26h 56m1 stop
Air Canada Logo
12:55 pm - 8:35 am
DCA
-
LHR
14h 40m1 stop
$627Air Canada
Mon, Apr 20 - Wed, May 6
Air Canada Logo
12:00 pm - 12:19 pm
LHR
-
DCA
29h 19m1 stop
Air Canada Logo
12:55 pm - 9:20 am
DCA
-
LHR
15h 25m1 stop
$628Air Canada
Wed, Dec 17 - Fri, Jan 9
Air Canada Logo
12:00 pm - 12:19 pm
LHR
-
DCA
29h 19m1 stop
Air Canada Logo
6:00 am - 7:10 am
DCA
-
LHR
20h 10m1 stop
$629Air Canada
Wed, Dec 17 - Sat, Jan 10
Air Canada Logo
12:00 pm - 12:19 pm
LHR
-
DCA
29h 19m1 stop
Air Canada Logo
6:00 am - 9:20 am
DCA
-
LHR
22h 20m2 stops
$631Air Canada
Wed, Dec 17 - Sun, Jan 11
JetBlue Logo
9:20 am - 5:34 pm
LHR
-
DCA
13h 14m1 stop
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
9h 45m1 stop
$632JetBlue
Tue, Feb 3 - Fri, Feb 27
Air Canada Logo
1:25 pm - 9:56 pm
LHR
-
DCA
13h 31m1 stop
Air Canada Logo
4:10 pm - 7:10 am
DCA
-
LHR
10h 00m1 stop
$633Air Canada
Sun, Dec 14 - Wed, Jan 7
JetBlue Logo
9:20 am - 9:45 pm
LHR
-
DCA
17h 25m1 stop
JetBlue Logo
6:00 am - 9:40 pm
DCA
-
LHR
10h 40m1 stop
$634JetBlue
Sat, Jan 10 - Wed, Jan 14
Air Canada Logo
1:25 pm - 10:21 am
LHR
-
DCA
25h 56m1 stop
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
15h 05m1 stop
$635Air Canada
Wed, Dec 24 - Tue, Jan 6

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
Jan 8
LHR1:25 pmLondon Heathrow
13h 31m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
Jan 17
DCA11:05 amWashington, D.C. Reagan-National
15h 05m
1 stop
LHR7:10 amLondon Heathrow
$650
Find similar
Air Canada
Dec 10
LHR1:25 pmLondon Heathrow
14h 10m
2 stops
DCA10:35 pmWashington, D.C. Reagan-National
Jan 7
DCA12:55 pmWashington, D.C. Reagan-National
13h 15m
2 stops
LHR7:10 amLondon Heathrow
$666
Find similar
Air Canada
Feb 3
LHR9:00 amLondon Heathrow
15h 59m
2 stops
DCA7:59 pmWashington, D.C. Reagan-National
Feb 27
DCA9:40 amWashington, D.C. Reagan-National
17h 50m
1 stop
LHR8:30 amLondon Heathrow
$699
Find similar

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

Our best Iberia deals on London Heathrow Airport to Washington, D.C. Reagan-National Airport flight tickets
Iberia
Feb 4
LHR7:35 amLondon Heathrow
16h 19m
2 stops
DCA6:54 pmWashington, D.C. Reagan-National
Feb 9
DCA1:35 pmWashington, D.C. Reagan-National
11h 45m
1 stop
LHR6:20 amLondon Heathrow
$653
Find similar
Iberia
Jan 17
LHR2:10 pmLondon Heathrow
13h 45m
1 stop
DCA10:55 pmWashington, D.C. Reagan-National
Jan 24
DCA3:24 pmWashington, D.C. Reagan-National
11h 51m
1 stop
LHR8:15 amLondon Heathrow
$683
Find similar
Iberia
Mar 7
LHR7:40 pmLondon Heathrow
30h 20m
2 stops
DCA9:00 pmWashington, D.C. Reagan-National
Mar 16
DCA1:30 pmWashington, D.C. Reagan-National
15h 45m
2 stops
LHR9:15 amLondon Heathrow
$685
Find similar

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 December 5, 2025.
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 2/19

9:20 am-4:04 pm

1 stop11h 44m

Washington, D.C. Reagan-National

Wed 2/25

6:00 am-9:40 pm

1 stop10h 40m

$625

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/17

12:00 pm-12:19 pm

1 stop29h 19m

Washington, D.C. Reagan-National

Wed 1/7

3:30 pm-7:55 am

1 stop11h 25m

$626

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 4/20

2:05 pm-12:01 pm

1 stop26h 56m

Washington, D.C. Reagan-National

Wed 5/6

12:55 pm-8:35 am

1 stop14h 40m

$627

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/17

12:00 pm-12:19 pm

1 stop29h 19m

Washington, D.C. Reagan-National

Fri 1/9

12:55 pm-9:20 am

1 stop15h 25m

$628

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/17

12:00 pm-12:19 pm

1 stop29h 19m

Washington, D.C. Reagan-National

Sat 1/10

6:00 am-7:10 am

1 stop20h 10m

$629

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/17

12:00 pm-12:19 pm

1 stop29h 19m

Washington, D.C. Reagan-National

Sun 1/11

6:00 am-9:20 am

2 stops22h 20m

$631

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 2/3

9:20 am-5:34 pm

1 stop13h 14m

Washington, D.C. Reagan-National

Fri 2/27

6:00 am-8:45 pm

1 stop9h 45m

$632

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sun 12/14

1:25 pm-9:56 pm

1 stop13h 31m

Washington, D.C. Reagan-National

Wed 1/7

4:10 pm-7:10 am

1 stop10h 00m

$633

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sat 1/10

9:20 am-9:45 pm

1 stop17h 25m

Washington, D.C. Reagan-National

Wed 1/14

6:00 am-9:40 pm

1 stop10h 40m

$634

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/24

1:25 pm-10:21 am

1 stop25h 56m

Washington, D.C. Reagan-National

Tue 1/6

11:05 am-7:10 am

1 stop15h 05m

$635

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 $655. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $674.

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from London Heathrow Airport to Washington, D.C. Reagan-National Airport is on a Tuesday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Tuesday will often find tickets for as low as $642. Flights from London Heathrow Airport to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $1,485. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest London Heathrow Airport to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the afternoon. Our users have found flights to Washington, D.C. Reagan-National Airport in the afternoon for as low as $701. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is at noon when prices are around $1,590.

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 $803 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.

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 40m

Direct flights

None
The fastest flight from London Heathrow Airport to Washington, D.C. Reagan-National Airport takes 11h 40m
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.
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  • 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 09m, 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie
Linthicum Heights
Springfield

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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