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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
12:55 - 07:10
DCA
-
LHR
13h 15m2 stops
Multiple Airlines Logo
06:50 - 15:33
LHR
-
DCA
13h 43m2 stops
£443Multiple Airlines
Thu, 5 Feb - Thu, 12 Feb
Multiple Airlines Logo
12:55 - 07:10
DCA
-
LHR
13h 15m2 stops
Multiple Airlines Logo
06:50 - 15:33
LHR
-
DCA
13h 43m2 stops
£444Multiple Airlines
Tue, 3 Feb - Tue, 10 Feb
Multiple Airlines Logo
16:15 - 07:10
DCA
-
LHR
9h 55m1 stop
Multiple Airlines Logo
06:50 - 15:33
LHR
-
DCA
13h 43m2 stops
£447Multiple Airlines
Tue, 3 Feb - Tue, 10 Feb
Multiple Airlines Logo
16:15 - 07:10
DCA
-
LHR
9h 55m1 stop
Multiple Airlines Logo
06:50 - 15:33
LHR
-
DCA
13h 43m2 stops
£449Multiple Airlines
Thu, 5 Feb - Thu, 12 Feb
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
JetBlue Logo
15:25 - 06:55
DCA
-
LHR
10h 30m1 stop
JetBlue Logo
09:20 - 16:19
LHR
-
DCA
11h 59m1 stop
£458JetBlue
Wed, 4 Feb - Wed, 11 Feb
Air Canada Logo
12:55 - 09:20
DCA
-
LHR
15h 25m1 stop
Air Canada Logo
06:50 - 10:23
LHR
-
DCA
32h 33m2 stops
£459Air Canada
Fri, 13 Feb - Sun, 22 Feb

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport 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 Heathrow Airport

Our best Finnair deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport 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 Heathrow 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 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 Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 5/2

12:55-07:10

2 stops13h 15m

London Heathrow

Thu 12/2

06:50-15:33

2 stops13h 43m

£443

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 3/2

12:55-07:10

2 stops13h 15m

London Heathrow

Tue 10/2

06:50-15:33

2 stops13h 43m

£444

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 3/2

16:15-07:10

1 stop9h 55m

London Heathrow

Tue 10/2

06:50-15:33

2 stops13h 43m

£447

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 5/2

16:15-07:10

1 stop9h 55m

London Heathrow

Thu 12/2

06:50-15:33

2 stops13h 43m

£449

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 - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 4/2

15:25-06:55

1 stop10h 30m

London Heathrow

Wed 11/2

09:20-16:19

1 stop11h 59m

£458

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 13/2

12:55-09:20

1 stop15h 25m

London Heathrow

Sun 22/2

06:50-10:23

2 stops32h 33m

£459

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 Heathrow 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 London Heathrow Airport?

In general, January is the cheapest month to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £458. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Washington, D.C. Reagan-National Airport averaging around £476.

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

On average, the least expensive day to fly to London Heathrow Airport from Washington, D.C. Reagan-National Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £527. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £604.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Washington, D.C. Reagan-National Airport to London Heathrow Airport in the afternoon for as low as £559. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £573 on average. Flights to London Heathrow Airport from Washington, D.C. Reagan-National Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport from Washington, D.C. Reagan-National Airport for as low as £465 on momondo.

How have Washington, D.C. Reagan-National Airport to London Heathrow Airport flight prices changed over time?

As of December 2025, prices for Washington, D.C. Reagan-National Airport to London Heathrow Airport flights are approximately 42% more expensive when compared to flights at the same time last year.

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

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

Fastest flight time

9h 15m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 15m
There are no direct flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport. There are no popular flight routes from Washington, D.C. Reagan-National Airport to London Heathrow Airport.
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  • How far is Washington, D.C. Reagan-National to London Heathrow by plane?

    There are 3651.9 mi between Washington, D.C. Reagan-National and London Heathrow. By plane, this route typically takes 9h 15m.

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to London Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow 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 London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Northampton
Swindon
Stratford-upon-Avon
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Swanage
Hayes
Chelmsford
Dover
Worthing

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Washington, D.C..

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

momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

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 London from Washington, D.C..

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

Yes. momondo can track prices for Washington, D.C. to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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