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Cheap flights from London to Washington, D.C. from $497

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 1/14. 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

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JetBlue Logo
7:25 am - 10:58 pmLHR-DCA
20h 33m1 stop
JetBlue Logo
3:40 pm - 6:55 amDCA-LHR
10h 15m1 stop
$550JetBlue
Find Deal
Wed, Dec 3 - Tue, Dec 9
Icelandair Logo
9:20 am - 9:51 pmLHR-DCA
17h 31m1 stop
Icelandair Logo
6:15 am - 8:45 pmDCA-LHR
9h 30m1 stop
$553Icelandair
Find Deal
Mon, Feb 2 - Mon, Feb 9
American Airlines Logo
11:20 am - 11:44 pmLGW-DCA
17h 24m2 stops
American Airlines Logo
10:20 am - 7:30 amDCA-LGW
16h 10m2 stops
$656American Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
American Airlines Logo
12:30 pm - 8:36 amLGW-DCA
25h 06m1 stop
American Airlines Logo
1:44 pm - 9:00 amDCA-LGW
14h 16m1 stop
$657American Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
Multiple Airlines Logo
9:40 pm - 6:05 pmLGW-DCA
25h 25m2 stops
Multiple Airlines Logo
12:55 pm - 2:00 pmDCA-LGW
20h 05m3 stops
$665Multiple Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 9
Multiple Airlines Logo
11:20 am - 11:07 pmLGW-DCA
16h 47m1 stop
Multiple Airlines Logo
11:56 am - 7:30 amDCA-LGW
14h 34m1 stop
$669Multiple Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19
British Airways Logo
11:20 am - 8:59 pmLGW-DCA
14h 39m1 stop
British Airways Logo
11:30 am - 7:30 amDCA-LGW
16h 00m1 stop
$677British Airways
Find Deal
Thu, Feb 26 - Tue, Mar 17
British Airways Logo
11:20 am - 9:24 pmLGW-DCA
15h 04m1 stop
British Airways Logo
11:46 am - 7:30 amDCA-LGW
14h 44m1 stop
$706British Airways
Find Deal
Fri, Jan 9 - Mon, Jan 12
Delta Logo
7:45 am - 6:11 pmLCY-DCA
15h 26m2 stops
Delta Logo
11:00 am - 4:40 pmDCA-LCY
24h 40m2 stops
$784Delta
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Thu, Apr 23 - Mon, Apr 27
Delta Logo
8:40 am - 11:26 pmLCY-DCA
19h 46m2 stops
Delta Logo
11:00 am - 4:40 pmDCA-LCY
24h 40m2 stops
$789Delta
Find Deal
Thu, Apr 23 - Mon, Apr 27

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

Our best JetBlue deals on London to Washington, D.C. Reagan-National Airport flight tickets
JetBlue
Dec 3
LHR7:25 amLondon Heathrow
20h 33m
1 stop
DCA10:58 pmWashington, D.C. Reagan-National
Dec 9
DCA3:40 pmWashington, D.C. Reagan-National
10h 15m
1 stop
LHR6:55 amLondon Heathrow
$550
Find similar
JetBlue
Jan 21
LHR7:25 amLondon Heathrow
20h 22m
1 stop
DCA10:47 pmWashington, D.C. Reagan-National
Jan 27
DCA3:30 pmWashington, D.C. Reagan-National
10h 25m
1 stop
LHR6:55 amLondon Heathrow
$554
Find similar
JetBlue
Nov 17
LHR8:05 amLondon Heathrow
11h 31m
1 stop
DCA2:36 pmWashington, D.C. Reagan-National
Dec 1
DCA6:15 amWashington, D.C. Reagan-National
9h 30m
1 stop
LHR8:45 pmLondon Heathrow
$562
Find similar

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
Feb 2
LHR9:20 amLondon Heathrow
17h 31m
1 stop
DCA9:51 pmWashington, D.C. Reagan-National
Feb 9
DCA6:15 amWashington, D.C. Reagan-National
9h 30m
1 stop
LHR8:45 pmLondon Heathrow
$553
Find similar
Icelandair
Feb 2
LHR9:20 amLondon Heathrow
14h 33m
1 stop
DCA6:53 pmWashington, D.C. Reagan-National
Feb 9
DCA1:00 pmWashington, D.C. Reagan-National
12h 55m
1 stop
LHR6:55 amLondon Heathrow
$556
Find similar
Icelandair
Dec 10
LHR7:25 amLondon Heathrow
20h 34m
1 stop
DCA10:59 pmWashington, D.C. Reagan-National
Dec 14
DCA6:59 pmWashington, D.C. Reagan-National
30h 56m
1 stop
LHR6:55 amLondon Heathrow
$573
Find similar

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 October 30, 2025.
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.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/3

7:25 am-10:58 pm

1 stop20h 33m

Washington, D.C. Reagan-National

Tue 12/9

3:40 pm-6:55 am

1 stop10h 15m

$550

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 2/2

9:20 am-9:51 pm

1 stop17h 31m

Washington, D.C. Reagan-National

Mon 2/9

6:15 am-8:45 pm

1 stop9h 30m

$553

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Sun 12/14

11:20 am-11:44 pm

2 stops17h 24m

Washington, D.C. Reagan-National

Sun 12/21

10:20 am-7:30 am

2 stops16h 10m

$656

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Sun 12/14

12:30 pm-8:36 am

1 stop25h 06m

Washington, D.C. Reagan-National

Sun 12/21

1:44 pm-9:00 am

1 stop14h 16m

$657

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Tue 11/25

9:40 pm-6:05 pm

2 stops25h 25m

Washington, D.C. Reagan-National

Tue 12/9

12:55 pm-2:00 pm

3 stops20h 05m

$665

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 12/12

11:20 am-11:07 pm

1 stop16h 47m

Washington, D.C. Reagan-National

Fri 12/19

11:56 am-7:30 am

1 stop14h 34m

$669

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Thu 2/26

11:20 am-8:59 pm

1 stop14h 39m

Washington, D.C. Reagan-National

Tue 3/17

11:30 am-7:30 am

1 stop16h 00m

$677

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 1/9

11:20 am-9:24 pm

1 stop15h 04m

Washington, D.C. Reagan-National

Mon 1/12

11:46 am-7:30 am

1 stop14h 44m

$706

LondonWashington, D.C.

LCY - DCA

LCYDCA

London City

Thu 4/23

7:45 am-6:11 pm

2 stops15h 26m

Washington, D.C. Reagan-National

Mon 4/27

11:00 am-4:40 pm

2 stops24h 40m

$784

LondonWashington, D.C.

LCY - DCA

LCYDCA

London City

Thu 4/23

8:40 am-11:26 pm

2 stops19h 46m

Washington, D.C. Reagan-National

Mon 4/27

11:00 am-4:40 pm

2 stops24h 40m

$789

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 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 $551. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $654.

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

The cheapest day to depart from London 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 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 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 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 $818 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

Direct flights

None
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.
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  • 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 25m.

  • 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

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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