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Cheap flights from Washington, D.C. Reagan-National Airport to London from £253

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 5/3. 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.
Air Canada Logo
12:55 - 07:10
DCA
-
LHR
37h 15m
2 stops
Air Canada Logo
06:50 - 21:56
LHR
-
DCA
19h 06m
2 stops
£435Air Canada
Sun, 1 Mar - Tue, 17 Mar
Air Canada Logo
18:50 - 08:30
DCA
-
LHR
32h 40m
1 stop
Air Canada Logo
06:50 - 21:56
LHR
-
DCA
19h 06m
2 stops
£438Air Canada
Sun, 1 Mar - Tue, 17 Mar
Air Canada Logo
12:55 - 09:20
DCA
-
LHR
15h 25m
1 stop
Air Canada Logo
09:00 - 22:35
LHR
-
DCA
17h 35m
2 stops
£441Air Canada
Fri, 6 Mar - Fri, 13 Mar
Virgin Atlantic Logo
17:00 - 07:50
DCA
-
LHR
9h 50m
1 stop
Virgin Atlantic Logo
10:45 - 19:40
LHR
-
DCA
12h 55m
1 stop
£444Virgin Atlantic
Sun, 1 Mar - Tue, 17 Mar
Multiple Airlines Logo
11:05 - 10:05
DCA
-
LHR
19h 00m
2 stops
Multiple Airlines Logo
06:50 - 21:56
LHR
-
DCA
19h 06m
2 stops
£446Multiple Airlines
Wed, 11 Mar - Tue, 17 Mar
Air Canada Logo
12:55 - 09:20
DCA
-
LHR
15h 25m
1 stop
Air Canada Logo
13:25 - 21:56
LHR
-
DCA
12h 31m
1 stop
£452Air Canada
Fri, 6 Mar - Fri, 13 Mar
Multiple Airlines Logo
12:55 - 09:20
DCA
-
LHR
16h 25m
1 stop
Multiple Airlines Logo
13:30 - 08:55
LHR
-
DCA
23h 25m
2 stops
£453Multiple Airlines
Wed, 11 Mar - Tue, 17 Mar
Air Canada Logo
16:15 - 07:10
DCA
-
LHR
9h 55m
1 stop
Air Canada Logo
13:25 - 21:56
LHR
-
DCA
13h 31m
1 stop
£454Air Canada
Sun, 22 Feb - Tue, 3 Mar
Air Canada Logo
16:15 - 09:20
DCA
-
LHR
12h 05m
1 stop
Air Canada Logo
13:25 - 21:56
LHR
-
DCA
13h 31m
1 stop
£456Air Canada
Sun, 22 Feb - Tue, 3 Mar
Air Canada Logo
12:55 - 09:20
DCA
-
LHR
15h 25m
1 stop
Air Canada Logo
09:00 - 21:56
LHR
-
DCA
16h 56m
2 stops
£457Air Canada
Fri, 6 Mar - Thu, 12 Mar

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
5 Mar
DCA06:00Washington, D.C. Reagan-National
20h 10m
1 stop
LHR07:10London Heathrow
8 Mar
LHR06:50London Heathrow
14h 43m
2 stops
DCA16:33Washington, D.C. Reagan-National
£464
United Airlines
8 Mar
DCA08:20Washington, D.C. Reagan-National
22h 55m
1 stop
LHR11:15London Heathrow
15 Mar
LHR12:00London Heathrow
28h 19m
1 stop
DCA12:19Washington, D.C. Reagan-National
£465
United Airlines
11 Mar
DCA12:55Washington, D.C. Reagan-National
16h 25m
1 stop
LHR09:20London Heathrow
18 Mar
LHR13:25London Heathrow
12h 31m
1 stop
DCA21:56Washington, D.C. Reagan-National
£477

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

Our best JetBlue deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
JetBlue
11 Feb
DCA06:00Washington, D.C. Reagan-National
10h 40m
1 stop
LHR21:40London Heathrow
18 Feb
LHR09:20London Heathrow
13h 14m
1 stop
DCA17:34Washington, D.C. Reagan-National
£482
JetBlue
16 Feb
DCA06:00Washington, D.C. Reagan-National
9h 45m
1 stop
LHR20:45London Heathrow
26 Feb
LHR09:20London Heathrow
14h 35m
1 stop
DCA18:55Washington, D.C. Reagan-National
£484
JetBlue
28 Feb
DCA06:00Washington, D.C. Reagan-National
11h 00m
1 stop
LHR22:00London Heathrow
5 Mar
LHR09:20London Heathrow
13h 29m
1 stop
DCA17:49Washington, D.C. Reagan-National
£485

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 9 February 2026.
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

Sun 1/3

12:55-07:10

2 stops37h 15m

London Heathrow

Tue 17/3

06:50-21:56

2 stops19h 06m

£435

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 1/3

18:50-08:30

1 stop32h 40m

London Heathrow

Tue 17/3

06:50-21:56

2 stops19h 06m

£438

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 6/3

12:55-09:20

1 stop15h 25m

London Heathrow

Fri 13/3

09:00-22:35

2 stops17h 35m

£441

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 1/3

17:00-07:50

1 stop9h 50m

London Heathrow

Tue 17/3

10:45-19:40

1 stop12h 55m

£444

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 11/3

11:05-10:05

2 stops19h 00m

London Heathrow

Tue 17/3

06:50-21:56

2 stops19h 06m

£446

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 6/3

12:55-09:20

1 stop15h 25m

London Heathrow

Fri 13/3

13:25-21:56

1 stop12h 31m

£452

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 11/3

12:55-09:20

1 stop16h 25m

London Heathrow

Tue 17/3

13:30-08:55

2 stops23h 25m

£453

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 22/2

16:15-07:10

1 stop9h 55m

London Heathrow

Tue 3/3

13:25-21:56

1 stop13h 31m

£454

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 22/2

16:15-09:20

1 stop12h 05m

London Heathrow

Tue 3/3

13:25-21:56

1 stop13h 31m

£456

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 6/3

12:55-09:20

1 stop15h 25m

London Heathrow

Thu 12/3

09:00-21:56

2 stops16h 56m

£457

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, October 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 £469. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Washington, D.C. Reagan-National Airport averaging around £473.

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 Sunday. momondo users have found tickets for Sunday departures for as low as £524. 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 £600.

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 £541. 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 £564 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 £573 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 £485 on momondo.

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

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 01m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 01m
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.
Search flight deals

  • 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 01m.

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

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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