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Cheap flights from Washington, D.C. Reagan-National Airport to London from £282

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to London departing on 14/1. 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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0 bags
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Find the cheapest flights from Washington, D.C. Reagan-National Airport to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:00 - 06:00
DCA
-
LGW
19h 00m1 stop
Multiple Airlines Logo
13:00 - 22:47
LGW
-
DCA
14h 47m1 stop
£435Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
06:00 - 20:10
DCA
-
LTN
33h 10m3 stops
Multiple Airlines Logo
20:50 - 15:33
LTN
-
DCA
23h 43m3 stops
£436Multiple Airlines
Mon, 19 Jan - Mon, 26 Jan
JetBlue Logo
06:00 - 21:40
DCA
-
LHR
10h 40m1 stop
JetBlue Logo
09:20 - 16:04
LHR
-
DCA
11h 44m1 stop
£450JetBlue
Thu, 5 Feb - Thu, 12 Feb
Air Canada Logo
12:55 - 09:20
DCA
-
LHR
15h 25m1 stop
Air Canada Logo
09:00 - 19:59
LHR
-
DCA
15h 59m2 stops
£453Air Canada
Wed, 4 Feb - Wed, 11 Feb
Air Canada Logo
12:55 - 07:10
DCA
-
LHR
13h 15m2 stops
Air Canada Logo
09:00 - 19:45
LHR
-
DCA
15h 45m2 stops
£455Air Canada
Mon, 19 Jan - Mon, 26 Jan
JetBlue Logo
13:00 - 06:55
DCA
-
LHR
12h 55m1 stop
JetBlue Logo
09:20 - 17:49
LHR
-
DCA
13h 29m1 stop
£457JetBlue
Fri, 30 Jan - Fri, 27 Feb
British Airways Logo
11:46 - 07:30
DCA
-
LGW
14h 44m1 stop
British Airways Logo
11:20 - 23:25
LGW
-
DCA
17h 05m1 stop
£457British Airways
Wed, 21 Jan - Wed, 28 Jan
American Airlines Logo
06:30 - 07:30
DCA
-
LGW
20h 00m1 stop
American Airlines Logo
11:20 - 23:36
LGW
-
DCA
17h 16m1 stop
£459American Airlines
Fri, 6 Feb - Wed, 18 Feb
American Airlines Logo
06:30 - 07:30
DCA
-
LGW
20h 00m1 stop
American Airlines Logo
11:20 - 23:59
LGW
-
DCA
17h 39m2 stops
£462American Airlines
Tue, 3 Feb - Wed, 25 Feb
British Airways Logo
08:20 - 07:30
DCA
-
LGW
18h 10m1 stop
British Airways Logo
10:45 - 21:30
LGW
-
DCA
15h 45m1 stop
£469British Airways
Mon, 26 Jan - Tue, 12 May

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to London flight tickets
United Airlines
28 Jan
DCA20:00Washington, D.C. Reagan-National
30h 55m
1 stop
LHR07:55London Heathrow
1 Feb
LHR12:00London Heathrow
29h 19m
1 stop
DCA12:19Washington, D.C. Reagan-National
£468
Find similar
United Airlines
13 Feb
DCA07:30Washington, D.C. Reagan-National
22h 45m
1 stop
LHR11:15London Heathrow
21 Feb
LHR15:00London Heathrow
24h 23m
1 stop
DCA10:23Washington, D.C. Reagan-National
£471
Find similar
United Airlines
13 Feb
DCA12:55Washington, D.C. Reagan-National
15h 25m
1 stop
LHR09:20London Heathrow
20 Feb
LHR15:00London Heathrow
11h 58m
1 stop
DCA21:58Washington, D.C. Reagan-National
£480
Find similar

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

Our best Finnair deals on Washington, D.C. Reagan-National Airport to London flight tickets
Finnair
20 Jan
DCA17:45Washington, D.C. Reagan-National
10h 55m
1 stop
LHR09:40London Heathrow
27 Jan
LHR15:35London Heathrow
11h 28m
1 stop
DCA22:03Washington, D.C. Reagan-National
£474
Find similar
Finnair
18 Jan
DCA17:45Washington, D.C. Reagan-National
10h 55m
1 stop
LHR09:40London Heathrow
25 Jan
LHR15:35London Heathrow
11h 28m
1 stop
DCA22:03Washington, D.C. Reagan-National
£474
Find similar
Finnair
23 Jan
DCA17:45Washington, D.C. Reagan-National
10h 55m
1 stop
LHR09:40London Heathrow
31 Jan
LHR15:35London Heathrow
11h 23m
1 stop
DCA21:58Washington, D.C. Reagan-National
£475
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Reagan-National Airport to London 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 279,928 searches. Data last updated 23 December 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 4/2

06:00-06:00

1 stop19h 00m

London Gatwick

Wed 11/2

13:00-22:47

1 stop14h 47m

£435

Washington, D.C.London

DCA - LTN

DCALTN

Washington, D.C. Reagan-National

Mon 19/1

06:00-20:10

3 stops33h 10m

London Luton

Mon 26/1

20:50-15:33

3 stops23h 43m

£436

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 5/2

06:00-21:40

1 stop10h 40m

London Heathrow

Thu 12/2

09:20-16:04

1 stop11h 44m

£450

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 4/2

12:55-09:20

1 stop15h 25m

London Heathrow

Wed 11/2

09:00-19:59

2 stops15h 59m

£453

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 19/1

12:55-07:10

2 stops13h 15m

London Heathrow

Mon 26/1

09:00-19:45

2 stops15h 45m

£455

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 30/1

13:00-06:55

1 stop12h 55m

London Heathrow

Fri 27/2

09:20-17:49

1 stop13h 29m

£457

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 21/1

11:46-07:30

1 stop14h 44m

London Gatwick

Wed 28/1

11:20-23:25

1 stop17h 05m

£457

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Fri 6/2

06:30-07:30

1 stop20h 00m

London Gatwick

Wed 18/2

11:20-23:36

1 stop17h 16m

£459

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Tue 3/2

06:30-07:30

1 stop20h 00m

London Gatwick

Wed 25/2

11:20-23:59

2 stops17h 39m

£462

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Mon 26/1

08:20-07:30

1 stop18h 10m

London Gatwick

Tue 12/5

10:45-21:30

1 stop15h 45m

£469

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to London

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 London?

The cheapest month to fly to London from Washington, D.C. Reagan-National Airport is in September. Flight prices, which tend to average around £469, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Washington, D.C. Reagan-National Airport averaging around £478.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £527. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Reagan-National Airport to London for around £604.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £559. Flights at midday are often more expensive, with an average ticket price of £1,425.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £568 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. Reagan-National Airport for as low as £465 on momondo.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. Reagan-National Airport to London (DCA to LON) flight deals and tips

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

Fastest flight time

9h 15m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London takes 9h 15m
There are no direct flights from Washington, D.C. Reagan-National Airport to London. There are no popular flight routes from Washington, D.C. Reagan-National Airport to London.
Search flight deals

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

    Washington, D.C. Reagan-National and London are 3664.8 mi apart from one another. A reasonable flight in good conditions will take 9h 15m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Reagan-National Airport to London.

  • What documentation or ID do you need to fly to London?

    The required travel and health documents for your London 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 London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Hayes
Chelmsford
Dover
Worthing
Bedford
Colchester
Hounslow
Ramsgate
Romford

Why use momondo?

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

Finding the right flight to London from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Washington, D.C. to London flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to London.

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

Of course. momondo tracks the price of Washington, D.C. to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport