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Cheap flights from London to Washington, D.C. from $503

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 4/29. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:00 pm - 10:59 pm
LGW
-
DCA
14h 59m
1 stop
Multiple Airlines Logo
6:00 am - 6:00 am
DCA
-
LGW
19h 00m
1 stop
$567Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
JetBlue Logo
9:20 am - 4:04 pm
LHR
-
DCA
11h 44m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
9h 45m
1 stop
$569JetBlue
Thu, Feb 12 - Sun, Feb 15
JetBlue Logo
9:20 am - 4:04 pm
LHR
-
DCA
11h 44m
1 stop
JetBlue Logo
8:55 pm - 6:55 am
DCA
-
LHR
29h 00m
1 stop
$570JetBlue
Thu, Feb 12 - Sun, Feb 15
JetBlue Logo
7:25 am - 10:59 pm
LHR
-
DCA
20h 34m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
DCA
-
LHR
9h 45m
1 stop
$572JetBlue
Tue, Feb 17 - Tue, May 19
JetBlue Logo
12:20 pm - 10:59 pm
LHR
-
DCA
15h 39m
1 stop
JetBlue Logo
11:55 am - 6:55 am
DCA
-
LHR
14h 00m
1 stop
$573JetBlue
Fri, Feb 13 - Wed, Feb 25
Air Canada Logo
9:00 am - 10:35 pm
LHR
-
DCA
17h 35m
2 stops
Air Canada Logo
11:05 am - 7:10 am
DCA
-
LHR
16h 05m
1 stop
$596Air Canada
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
1:00 pm - 10:59 pm
LGW
-
DCA
13h 59m
1 stop
Multiple Airlines Logo
6:00 am - 6:00 am
DCA
-
LGW
20h 00m
1 stop
$620Multiple Airlines
Fri, Mar 13 - Sat, Mar 21
British Airways Logo
2:30 pm - 8:59 pm
LGW
-
DCA
35h 29m
1 stop
British Airways Logo
11:18 am - 6:50 am
DCA
-
LGW
14h 32m
1 stop
$683British Airways
Tue, May 12 - Tue, May 19
British Airways Logo
11:20 am - 11:42 pm
LGW
-
DCA
17h 22m
1 stop
British Airways Logo
7:29 am - 8:40 am
DCA
-
LGW
20h 11m
1 stop
$685British Airways
Mon, Mar 2 - Mon, May 4
Iberia Logo
11:45 am - 10:35 pm
LGW
-
DCA
15h 50m
2 stops
Iberia Logo
3:21 pm - 7:00 pm
DCA
-
LGW
22h 39m
2 stops
$695Iberia
Thu, Feb 19 - Thu, Feb 26

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
Feb 13
LHR7:30 amLondon Heathrow
15h 03m
2 stops
DCA5:33 pmWashington, D.C. Reagan-National
Feb 16
DCA12:00 pmWashington, D.C. Reagan-National
12h 55m
1 stop
LHR5:55 amLondon Heathrow
$605
United Airlines
Feb 28
LHR1:25 pmLondon Heathrow
25h 56m
1 stop
DCA10:21 amWashington, D.C. Reagan-National
Mar 7
DCA6:00 amWashington, D.C. Reagan-National
9h 35m
1 stop
LHR8:35 pmLondon Heathrow
$631
United Airlines
Feb 14
LHR3:10 pmLondon Heathrow
11h 48m
1 stop
DCA9:58 pmWashington, D.C. Reagan-National
Feb 21
DCA10:30 amWashington, D.C. Reagan-National
16h 25m
1 stop
LHR7:55 amLondon Heathrow
$633

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

Our best American Airlines deals on London to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Mar 18
LGW12:30 pmLondon Gatwick
29h 29m
1 stop
DCA1:59 pmWashington, D.C. Reagan-National
Mar 25
DCA1:41 pmWashington, D.C. Reagan-National
15h 19m
2 stops
LGW9:00 amLondon Gatwick
$638
American Airlines
Mar 18
LGW12:30 pmLondon Gatwick
31h 24m
1 stop
DCA3:54 pmWashington, D.C. Reagan-National
Mar 25
DCA2:33 pmWashington, D.C. Reagan-National
12h 57m
1 stop
LGW7:30 amLondon Gatwick
$639
American Airlines
Feb 19
LGW12:30 pmLondon Gatwick
16h 29m
2 stops
DCA11:59 pmWashington, D.C. Reagan-National
Feb 26
DCA1:59 pmWashington, D.C. Reagan-National
14h 01m
1 stop
LGW9:00 amLondon Gatwick
$734

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 February 1, 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

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Wed 2/18

1:00 pm-10:59 pm

1 stop14h 59m

Washington, D.C. Reagan-National

Sun 2/22

6:00 am-6:00 am

1 stop19h 00m

$567

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 2/12

9:20 am-4:04 pm

1 stop11h 44m

Washington, D.C. Reagan-National

Sun 2/15

6:00 am-8:45 pm

1 stop9h 45m

$569

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 2/12

9:20 am-4:04 pm

1 stop11h 44m

Washington, D.C. Reagan-National

Sun 2/15

8:55 pm-6:55 am

1 stop29h 00m

$570

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 2/17

7:25 am-10:59 pm

1 stop20h 34m

Washington, D.C. Reagan-National

Tue 5/19

6:00 am-8:45 pm

1 stop9h 45m

$572

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 2/13

12:20 pm-10:59 pm

1 stop15h 39m

Washington, D.C. Reagan-National

Wed 2/25

11:55 am-6:55 am

1 stop14h 00m

$573

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 3/17

9:00 am-10:35 pm

2 stops17h 35m

Washington, D.C. Reagan-National

Tue 3/24

11:05 am-7:10 am

1 stop16h 05m

$596

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 3/13

1:00 pm-10:59 pm

1 stop13h 59m

Washington, D.C. Reagan-National

Sat 3/21

6:00 am-6:00 am

1 stop20h 00m

$620

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Tue 5/12

2:30 pm-8:59 pm

1 stop35h 29m

Washington, D.C. Reagan-National

Tue 5/19

11:18 am-6:50 am

1 stop14h 32m

$683

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Mon 3/2

11:20 am-11:42 pm

1 stop17h 22m

Washington, D.C. Reagan-National

Mon 5/4

7:29 am-8:40 am

1 stop20h 11m

$685

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Thu 2/19

11:45 am-10:35 pm

2 stops15h 50m

Washington, D.C. Reagan-National

Thu 2/26

3:21 pm-7:00 pm

2 stops22h 39m

$695

Flights are sorted by cheapest round-trip flights 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 November is also cheap. Prices for this month can be found on momondo for an average of $624.

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 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 $766 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 for as low as $634 on momondo.

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 15m

Direct flights

None
The fastest flight from London to Washington, D.C. Reagan-National Airport takes 11h 15m
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 15m.

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