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Cheap flights from London to Washington, D.C. from $530

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 to Washington, D.C. departing on 5/4. 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:30 am - 5:25 pm
LHR
-
DCA
12h 55m
1 stop
United Airlines Logo
3:02 pm - 8:20 am
DCA
-
LHR
12h 18m
1 stop
$566United Airlines
Mon, Mar 30 - Sat, Apr 18
United Airlines Logo
11:05 am - 9:06 pm
LHR
-
DCA
15h 01m
1 stop
United Airlines Logo
2:00 pm - 6:45 am
DCA
-
LHR
11h 45m
1 stop
$575United Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
8:00 am - 5:04 pm
LHR
-
DCA
14h 04m
1 stop
United Airlines Logo
1:00 pm - 5:55 am
DCA
-
LHR
11h 55m
1 stop
$576United Airlines
Wed, May 20 - Wed, Jun 3
United Airlines Logo
7:45 am - 2:23 pm
LHR
-
DCA
11h 38m
1 stop
United Airlines Logo
3:10 pm - 8:20 am
DCA
-
LHR
12h 10m
1 stop
$578United Airlines
Wed, Jul 22 - Wed, Aug 5
Air Canada Logo
9:30 am - 3:39 pm
LHR
-
DCA
11h 09m
1 stop
Air Canada Logo
6:55 pm - 11:50 am
DCA
-
LHR
11h 55m
1 stop
$580Air Canada
Wed, May 20 - Wed, Jun 3
Air Canada Logo
2:10 pm - 12:01 pm
LHR
-
DCA
26h 51m
1 stop
Air Canada Logo
12:45 pm - 6:30 am
DCA
-
LHR
12h 45m
1 stop
$586Air Canada
Wed, May 6 - Mon, May 11
Air Canada Logo
9:30 am - 12:01 pm
LHR
-
DCA
31h 31m
1 stop
Air Canada Logo
4:10 pm - 10:00 am
DCA
-
LHR
12h 50m
1 stop
$587Air Canada
Thu, Apr 16 - Sun, Apr 19
British Airways Logo
12:30 pm - 6:58 pm
LHR
-
DCA
11h 28m
1 stop
British Airways Logo
5:40 pm - 8:30 am
DCA
-
LHR
9h 50m
1 stop
$593British Airways
Tue, Apr 14 - Sun, Apr 19
British Airways Logo
10:30 am - 4:45 pm
LHR
-
DCA
11h 15m
1 stop
British Airways Logo
4:43 pm - 7:10 am
DCA
-
LHR
9h 27m
1 stop
$594British Airways
Mon, Apr 27 - Mon, May 4
American Airlines Logo
12:20 pm - 9:23 pm
LGW
-
DCA
14h 03m
1 stop
American Airlines Logo
6:19 pm - 8:40 am
DCA
-
LGW
33h 21m
1 stop
$611American Airlines
Tue, May 5 - Mon, May 11

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

Our best United Airlines deals on London to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Mar 30
LHR9:30 amLondon Heathrow
12h 55m
1 stop
DCA5:25 pmWashington, D.C. Reagan-National
Apr 18
DCA3:02 pmWashington, D.C. Reagan-National
12h 18m
1 stop
LHR8:20 amLondon Heathrow
$566
United Airlines
Apr 2
LHR11:05 amLondon Heathrow
15h 01m
1 stop
DCA9:06 pmWashington, D.C. Reagan-National
Apr 6
DCA2:00 pmWashington, D.C. Reagan-National
11h 45m
1 stop
LHR6:45 amLondon Heathrow
$575
United Airlines
May 20
LHR8:00 amLondon Heathrow
14h 04m
1 stop
DCA5:04 pmWashington, D.C. Reagan-National
Jun 3
DCA1:00 pmWashington, D.C. Reagan-National
11h 55m
1 stop
LHR5:55 amLondon Heathrow
$576

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

Our best Icelandair deals on London to Washington, D.C. Reagan-National Airport flight tickets
Icelandair
May 4
LGW3:40 pmLondon Gatwick
21h 19m
2 stops
DCA7:59 amWashington, D.C. Reagan-National
May 8
DCA8:00 pmWashington, D.C. Reagan-National
13h 40m
2 stops
LGW2:40 pmLondon Gatwick
$803
Icelandair
Mar 24
LGW11:55 amLondon Gatwick
32h 23m
2 stops
DCA4:18 pmWashington, D.C. Reagan-National
Apr 3
DCA4:59 pmWashington, D.C. Reagan-National
16h 41m
2 stops
LGW2:40 pmLondon Gatwick
$1,165

momondo Fare Finder

 
Customize your flight search to find flights from London 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 March 18, 2026.
Use the filters below to find and compare flights from London 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

Mon 3/30

9:30 am-5:25 pm

1 stop12h 55m

Washington, D.C. Reagan-National

Sat 4/18

3:02 pm-8:20 am

1 stop12h 18m

$566

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 4/2

11:05 am-9:06 pm

1 stop15h 01m

Washington, D.C. Reagan-National

Mon 4/6

2:00 pm-6:45 am

1 stop11h 45m

$575

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 5/20

8:00 am-5:04 pm

1 stop14h 04m

Washington, D.C. Reagan-National

Wed 6/3

1:00 pm-5:55 am

1 stop11h 55m

$576

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 7/22

7:45 am-2:23 pm

1 stop11h 38m

Washington, D.C. Reagan-National

Wed 8/5

3:10 pm-8:20 am

1 stop12h 10m

$578

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 5/20

9:30 am-3:39 pm

1 stop11h 09m

Washington, D.C. Reagan-National

Wed 6/3

6:55 pm-11:50 am

1 stop11h 55m

$580

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 5/6

2:10 pm-12:01 pm

1 stop26h 51m

Washington, D.C. Reagan-National

Mon 5/11

12:45 pm-6:30 am

1 stop12h 45m

$586

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 4/16

9:30 am-12:01 pm

1 stop31h 31m

Washington, D.C. Reagan-National

Sun 4/19

4:10 pm-10:00 am

1 stop12h 50m

$587

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 4/14

12:30 pm-6:58 pm

1 stop11h 28m

Washington, D.C. Reagan-National

Sun 4/19

5:40 pm-8:30 am

1 stop9h 50m

$593
Quickest round-trip

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 4/27

10:30 am-4:45 pm

1 stop11h 15m

Washington, D.C. Reagan-National

Mon 5/4

4:43 pm-7:10 am

1 stop9h 27m

$594

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Tue 5/5

12:20 pm-9:23 pm

1 stop14h 03m

Washington, D.C. Reagan-National

Mon 5/11

6:19 pm-8:40 am

1 stop33h 21m

$611

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 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 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, with most prices found around $560. 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 $585.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London 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 to Washington, D.C. Reagan-National Airport (LON to DCA) flight deals and tips

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

Fastest flight time

11h 12m

Direct flights

None
The fastest flight from London to Washington, D.C. Reagan-National Airport takes 11h 12m
There are no direct flights from London to Washington, D.C. Reagan-National Airport. There are no popular flight routes from London to Washington, D.C. Reagan-National Airport.
Search flight deals

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

    A flight from London to Washington, D.C. Reagan-National will travel around 3664.8 mi. By plane, this route typically takes 11h 12m.

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

    Prices for flights from London to Washington, D.C. Reagan-National Airport refresh daily.

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

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

    The required travel and health documents for your Washington, D.C. Reagan-National 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 Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Linthicum Heights
Bethesda
Fairfax
Reston

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Washington, D.C. from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from London.

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

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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