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Cheap flights from London Heathrow Airport to Washington, D.C. from $439

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 9/5. 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.
United Airlines Logo
1:00 pm - 10:29 am
LHR
-
DCA
26h 29m
1 stop
United Airlines Logo
5:00 pm - 11:05 am
DCA
-
LHR
13h 05m
1 stop
$600United Airlines
Sat, Dec 5 - Sun, Dec 6
United Airlines Logo
9:30 am - 4:57 pm
LHR
-
DCA
12h 27m
1 stop
United Airlines Logo
10:07 am - 5:55 am
DCA
-
LHR
14h 48m
1 stop
$617United Airlines
Thu, Jul 30 - Mon, Aug 3
JetBlue Logo
8:15 am - 10:59 pm
LHR
-
DCA
19h 44m
1 stop
JetBlue Logo
2:00 pm - 6:30 am
DCA
-
LHR
11h 30m
1 stop
$637JetBlue
Tue, Sep 1 - Tue, Sep 8
JetBlue Logo
8:40 am - 6:01 pm
LHR
-
DCA
14h 21m
1 stop
JetBlue Logo
5:00 pm - 6:30 am
DCA
-
LHR
32h 30m
1 stop
$642JetBlue
Fri, Sep 4 - Mon, Sep 7
JetBlue Logo
8:40 am - 7:58 am
LHR
-
DCA
28h 18m
1 stop
JetBlue Logo
2:00 pm - 6:30 am
DCA
-
LHR
11h 30m
1 stop
$643JetBlue
Wed, Sep 2 - Tue, Sep 8
JetBlue Logo
8:40 am - 7:58 am
LHR
-
DCA
28h 18m
1 stop
JetBlue Logo
6:30 am - 8:45 pm
DCA
-
LHR
9h 15m
1 stop
$651JetBlue
Mon, Sep 7 - Wed, Oct 7
Virgin Atlantic Logo
3:00 pm - 10:09 am
LHR
-
DCA
24h 09m
2 stops
Virgin Atlantic Logo
5:05 pm - 6:45 am
DCA
-
LHR
32h 40m
2 stops
$663Virgin Atlantic
Thu, Sep 3 - Sat, Sep 19
Virgin Atlantic Logo
3:00 pm - 10:09 am
LHR
-
DCA
24h 09m
2 stops
Virgin Atlantic Logo
2:00 pm - 1:15 pm
DCA
-
LHR
18h 15m
1 stop
$669Virgin Atlantic
Thu, Sep 3 - Sat, Sep 19
British Airways Logo
9:15 am - 3:58 pm
LHR
-
DCA
11h 43m
1 stop
British Airways Logo
5:34 pm - 8:35 am
DCA
-
LHR
10h 01m
1 stop
$671British Airways
Thu, Sep 3 - Sat, Sep 19
British Airways Logo
3:00 pm - 9:51 pm
LHR
-
DCA
11h 51m
1 stop
British Airways Logo
5:18 pm - 7:50 am
DCA
-
LHR
9h 32m
1 stop
$672British Airways
Tue, Aug 25 - Mon, Sep 21

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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
Dec 5
LHR1:00 pmLondon Heathrow
26h 29m
1 stop
DCA10:29 amWashington, D.C. Reagan-National
Dec 6
DCA5:00 pmWashington, D.C. Reagan-National
13h 05m
1 stop
LHR11:05 amLondon Heathrow
$600
United Airlines
Jul 30
LHR9:30 amLondon Heathrow
15h 18m
1 stop
DCA7:48 pmWashington, D.C. Reagan-National
Aug 3
DCA1:00 pmWashington, D.C. Reagan-National
11h 55m
1 stop
LHR5:55 amLondon Heathrow
$617
United Airlines
Jul 17
LHR8:00 amLondon Heathrow
12h 52m
1 stop
DCA3:52 pmWashington, D.C. Reagan-National
Oct 14
DCA6:00 amWashington, D.C. Reagan-National
10h 25m
1 stop
LHR9:25 pmLondon Heathrow
$708

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

Our best Finnair deals on London Heathrow Airport to Washington, D.C. Reagan-National Airport flight tickets
Finnair
Sep 14
LHR5:25 pmLondon Heathrow
10h 45m
1 stop
DCA11:10 pmWashington, D.C. Reagan-National
Sep 20
DCA6:19 pmWashington, D.C. Reagan-National
12h 56m
1 stop
LHR12:15 pmLondon Heathrow
$675
Finnair
Aug 28
LHR2:30 pmLondon Heathrow
12h 00m
1 stop
DCA9:30 pmWashington, D.C. Reagan-National
Sep 4
DCA3:41 pmWashington, D.C. Reagan-National
13h 49m
1 stop
LHR10:30 amLondon Heathrow
$700
Finnair
Aug 25
LHR9:45 amLondon Heathrow
19h 14m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
Sep 2
DCA5:23 pmWashington, D.C. Reagan-National
12h 07m
1 stop
LHR10:30 amLondon Heathrow
$710

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 9, 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

Sat 12/5

1:00 pm-10:29 am

1 stop26h 29m

Washington, D.C. Reagan-National

Sun 12/6

5:00 pm-11:05 am

1 stop13h 05m

$600

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 7/30

9:30 am-4:57 pm

1 stop12h 27m

Washington, D.C. Reagan-National

Mon 8/3

10:07 am-5:55 am

1 stop14h 48m

$617

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 9/1

8:15 am-10:59 pm

1 stop19h 44m

Washington, D.C. Reagan-National

Tue 9/8

2:00 pm-6:30 am

1 stop11h 30m

$637

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 9/4

8:40 am-6:01 pm

1 stop14h 21m

Washington, D.C. Reagan-National

Mon 9/7

5:00 pm-6:30 am

1 stop32h 30m

$642

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 9/2

8:40 am-7:58 am

1 stop28h 18m

Washington, D.C. Reagan-National

Tue 9/8

2:00 pm-6:30 am

1 stop11h 30m

$643

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 9/7

8:40 am-7:58 am

1 stop28h 18m

Washington, D.C. Reagan-National

Wed 10/7

6:30 am-8:45 pm

1 stop9h 15m

$651

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 9/3

3:00 pm-10:09 am

2 stops24h 09m

Washington, D.C. Reagan-National

Sat 9/19

5:05 pm-6:45 am

2 stops32h 40m

$663

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 9/3

3:00 pm-10:09 am

2 stops24h 09m

Washington, D.C. Reagan-National

Sat 9/19

2:00 pm-1:15 pm

1 stop18h 15m

$669

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 9/3

9:15 am-3:58 pm

1 stop11h 43m

Washington, D.C. Reagan-National

Sat 9/19

5:34 pm-8:35 am

1 stop10h 01m

$671
Quickest round-trip

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 8/25

3:00 pm-9:51 pm

1 stop11h 51m

Washington, D.C. Reagan-National

Mon 9/21

5:18 pm-7:50 am

1 stop9h 32m

$672

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?

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

11h 16m

Direct flights

None
The fastest flight from London Heathrow Airport to Washington, D.C. Reagan-National Airport takes 11h 16m
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 11h 16m, 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
Colonial Beach
Towson
Manassas
Silver Spring
Tysons
Springfield
Fairfax
Bethesda
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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