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Cheap flights from Washington, D.C. Reagan-National Airport to London from £326

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 23/7. 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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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.
Scandinavian Airlines Logo
12:00 - 09:20
DCA
-
LHR
16h 20m
2 stops
Scandinavian Airlines Logo
07:05 - 23:04
LHR
-
DCA
20h 59m
2 stops
£634Scandinavian Airlines
Tue, 6 Oct - Fri, 23 Oct
Air Canada Logo
20:40 - 11:50
DCA
-
LHR
10h 10m
1 stop
Air Canada Logo
09:30 - 15:40
LHR
-
DCA
11h 10m
1 stop
£634Air Canada
Tue, 6 Oct - Fri, 23 Oct
Scandinavian Airlines Logo
11:00 - 09:35
DCA
-
LHR
17h 35m
2 stops
Scandinavian Airlines Logo
06:40 - 23:26
LHR
-
DCA
21h 46m
2 stops
£635Scandinavian Airlines
Mon, 24 Aug - Mon, 31 Aug
Multiple Airlines Logo
12:45 - 11:50
DCA
-
LHR
18h 05m
2 stops
Multiple Airlines Logo
06:00 - 22:28
LHR
-
DCA
21h 28m
2 stops
£636Multiple Airlines
Sun, 7 Jun - Thu, 11 Jun
Air Canada Logo
18:55 - 09:35
DCA
-
LHR
9h 40m
1 stop
Air Canada Logo
09:30 - 15:38
LHR
-
DCA
11h 08m
1 stop
£637Air Canada
Sun, 16 Aug - Tue, 25 Aug
Air Canada Logo
12:55 - 07:10
DCA
-
LHR
14h 15m
2 stops
Air Canada Logo
06:50 - 15:21
LHR
-
DCA
13h 31m
2 stops
£639Air Canada
Tue, 27 Oct - Tue, 3 Nov
Scandinavian Airlines Logo
12:00 - 09:20
DCA
-
LHR
16h 20m
2 stops
Scandinavian Airlines Logo
07:05 - 23:04
LHR
-
DCA
20h 59m
2 stops
£640Scandinavian Airlines
Wed, 14 Oct - Tue, 20 Oct
Air Canada Logo
12:40 - 10:00
DCA
-
LHR
16h 20m
2 stops
Air Canada Logo
08:40 - 21:48
LHR
-
DCA
18h 08m
2 stops
£640Air Canada
Wed, 19 Aug - Fri, 28 Aug
Air Canada Logo
12:40 - 08:35
DCA
-
LHR
14h 55m
1 stop
Air Canada Logo
09:00 - 22:37
LHR
-
DCA
17h 37m
2 stops
£641Air Canada
Wed, 14 Oct - Wed, 28 Oct
Air Canada Logo
09:40 - 06:30
DCA
-
LHR
15h 50m
1 stop
Air Canada Logo
08:40 - 20:00
LHR
-
DCA
16h 20m
2 stops
£643Air Canada
Tue, 22 Sep - Wed, 30 Sep

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
29 Oct
DCA17:15Washington, D.C. Reagan-National
9h 40m
1 stop
LHR06:55London Heathrow
1 Nov
LHR08:15London Heathrow
19h 33m
1 stop
DCA22:48Washington, D.C. Reagan-National
£668
JetBlue
1 Nov
DCA12:10Washington, D.C. Reagan-National
13h 45m
1 stop
LHR06:55London Heathrow
8 Nov
LHR08:15London Heathrow
19h 33m
1 stop
DCA22:48Washington, D.C. Reagan-National
£669
JetBlue
12 Nov
DCA14:25Washington, D.C. Reagan-National
11h 30m
1 stop
LHR06:55London Heathrow
17 Nov
LHR09:20London Heathrow
12h 59m
1 stop
DCA17:19Washington, D.C. Reagan-National
£669

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
23 Aug
DCA08:25Washington, D.C. Reagan-National
21h 00m
1 stop
LHR10:25London Heathrow
3 Sept
LHR14:05London Heathrow
25h 13m
1 stop
DCA10:18Washington, D.C. Reagan-National
£649
United Airlines
29 Sept
DCA16:20Washington, D.C. Reagan-National
12h 40m
1 stop
LHR10:00London Heathrow
6 Oct
LHR09:30London Heathrow
11h 10m
1 stop
DCA15:40Washington, D.C. Reagan-National
£660
United Airlines
5 Oct
DCA06:00Washington, D.C. Reagan-National
9h 40m
1 stop
LHR20:40London Heathrow
14 Oct
LHR09:30London Heathrow
11h 10m
1 stop
DCA15:40Washington, D.C. Reagan-National
£662

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 22 May 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

Cheapest return flight

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 6/10

12:00-09:20

2 stops16h 20m

London Heathrow

Fri 23/10

07:05-23:04

2 stops20h 59m

£634

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 6/10

20:40-11:50

1 stop10h 10m

London Heathrow

Fri 23/10

09:30-15:40

1 stop11h 10m

£634

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 24/8

11:00-09:35

2 stops17h 35m

London Heathrow

Mon 31/8

06:40-23:26

2 stops21h 46m

£635

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 7/6

12:45-11:50

2 stops18h 05m

London Heathrow

Thu 11/6

06:00-22:28

2 stops21h 28m

£636
Fastest return journey

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 16/8

18:55-09:35

1 stop9h 40m

London Heathrow

Tue 25/8

09:30-15:38

1 stop11h 08m

£637

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 27/10

12:55-07:10

2 stops14h 15m

London Heathrow

Tue 3/11

06:50-15:21

2 stops13h 31m

£639

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 14/10

12:00-09:20

2 stops16h 20m

London Heathrow

Tue 20/10

07:05-23:04

2 stops20h 59m

£640

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 19/8

12:40-10:00

2 stops16h 20m

London Heathrow

Fri 28/8

08:40-21:48

2 stops18h 08m

£640

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 14/10

12:40-08:35

1 stop14h 55m

London Heathrow

Wed 28/10

09:00-22:37

2 stops17h 37m

£641

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 22/9

09:40-06:30

1 stop15h 50m

London Heathrow

Wed 30/9

08:40-20:00

2 stops16h 20m

£643

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 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 typical price of a round-trip flight between Washington, D.C. Reagan-National Airport and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

In general, November 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 £480. The month of August is another great option to travel to London Heathrow Airport, with average flight prices from Washington, D.C. Reagan-National Airport averaging around £497.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as £551. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £619.

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 £528. 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 £608 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 from Washington, D.C. Reagan-National Airport 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 £648 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 £429 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 30m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 30m
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

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport

  • 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 30m.

  • 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
Gatwick
Luton
Wembley
Stratford-upon-Avon
Slough
Maidstone
Northampton
Swindon
Ipswich
Southend-on-Sea
Canterbury
Ilford
Hayes
Guildford
Poole
Folkestone
Chelmsford
Dover

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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