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Cheap flights from Washington, D.C. Reagan-National Airport to London from £270

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 14/5. 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.
Multiple Airlines Logo
06:00 - 20:45
DCA
-
LHR
9h 45m
1 stop
Multiple Airlines Logo
07:40 - 22:59
LHR
-
DCA
20h 19m
2 stops
£543Multiple Airlines
Thu, 23 Apr - Wed, 6 May
Air Canada Logo
16:20 - 10:00
DCA
-
LHR
12h 40m
1 stop
Air Canada Logo
14:05 - 21:55
LHR
-
DCA
12h 50m
1 stop
£545Air Canada
Tue, 19 May - Tue, 2 Jun
Air Canada Logo
12:45 - 06:30
DCA
-
LHR
12h 45m
1 stop
Air Canada Logo
14:05 - 21:55
LHR
-
DCA
12h 50m
1 stop
£557Air Canada
Mon, 18 May - Fri, 29 May
JetBlue Logo
06:00 - 20:45
DCA
-
LHR
9h 45m
1 stop
JetBlue Logo
11:55 - 22:59
LHR
-
DCA
16h 04m
1 stop
£559JetBlue
Thu, 23 Apr - Wed, 6 May
Air Canada Logo
18:55 - 11:50
DCA
-
LHR
11h 55m
1 stop
Air Canada Logo
14:05 - 21:55
LHR
-
DCA
12h 50m
1 stop
£561Air Canada
Sun, 17 May - Fri, 29 May
Air Canada Logo
16:20 - 10:00
DCA
-
LHR
12h 40m
1 stop
Air Canada Logo
09:30 - 15:39
LHR
-
DCA
11h 09m
1 stop
£568Air Canada
Tue, 12 May - Tue, 19 May
Air Canada Logo
12:45 - 06:30
DCA
-
LHR
12h 45m
1 stop
Air Canada Logo
14:05 - 21:55
LHR
-
DCA
12h 50m
1 stop
£577Air Canada
Thu, 21 May - Thu, 28 May
Air Canada Logo
16:20 - 10:00
DCA
-
LHR
12h 40m
1 stop
Air Canada Logo
09:30 - 15:39
LHR
-
DCA
11h 09m
1 stop
£580Air Canada
Tue, 19 May - Sat, 30 May
JetBlue Logo
06:00 - 20:45
DCA
-
LHR
9h 45m
1 stop
JetBlue Logo
11:55 - 22:59
LHR
-
DCA
16h 04m
1 stop
£580JetBlue
Mon, 27 Apr - Mon, 4 May
JetBlue Logo
06:00 - 20:45
DCA
-
LHR
9h 45m
1 stop
JetBlue Logo
08:15 - 22:59
LHR
-
DCA
19h 44m
1 stop
£581JetBlue
Thu, 23 Apr - Wed, 6 May

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

Our best Icelandair deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
Icelandair
22 Apr
DCA16:59Washington, D.C. Reagan-National
22h 21m
2 stops
LHR20:20London Heathrow
29 Apr
LHR13:05London Heathrow
23h 54m
2 stops
DCA07:59Washington, D.C. Reagan-National
£629
Icelandair
13 Apr
DCA18:30Washington, D.C. Reagan-National
20h 50m
2 stops
LHR20:20London Heathrow
20 Apr
LHR21:25London Heathrow
39h 34m
2 stops
DCA07:59Washington, D.C. Reagan-National
£631
Icelandair
13 Apr
DCA18:30Washington, D.C. Reagan-National
20h 50m
2 stops
LHR20:20London Heathrow
28 Apr
LHR21:25London Heathrow
39h 34m
2 stops
DCA07:59Washington, D.C. Reagan-National
£632

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

Our best Scandinavian Airlines deals on Washington, D.C. Reagan-National Airport to London Heathrow Airport flight tickets
Scandinavian Airlines
27 Apr
DCA11:00Washington, D.C. Reagan-National
17h 35m
2 stops
LHR09:35London Heathrow
4 May
LHR19:50London Heathrow
31h 51m
2 stops
DCA22:41Washington, D.C. Reagan-National
£594
Scandinavian Airlines
20 Apr
DCA11:00Washington, D.C. Reagan-National
17h 35m
2 stops
LHR09:35London Heathrow
29 Apr
LHR19:50London Heathrow
31h 51m
2 stops
DCA22:41Washington, D.C. Reagan-National
£601
Scandinavian Airlines
27 Apr
DCA11:00Washington, D.C. Reagan-National
17h 35m
2 stops
LHR09:35London Heathrow
6 May
LHR07:05London Heathrow
20h 36m
2 stops
DCA22:41Washington, D.C. Reagan-National
£601

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 1 April 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

Thu 23/4

06:00-20:45

1 stop9h 45m

London Heathrow

Wed 6/5

07:40-22:59

2 stops20h 19m

£543

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 19/5

16:20-10:00

1 stop12h 40m

London Heathrow

Tue 2/6

14:05-21:55

1 stop12h 50m

£545

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 18/5

12:45-06:30

1 stop12h 45m

London Heathrow

Fri 29/5

14:05-21:55

1 stop12h 50m

£557

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 23/4

06:00-20:45

1 stop9h 45m

London Heathrow

Wed 6/5

11:55-22:59

1 stop16h 04m

£559

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 17/5

18:55-11:50

1 stop11h 55m

London Heathrow

Fri 29/5

14:05-21:55

1 stop12h 50m

£561
Fastest return journey

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 12/5

16:20-10:00

1 stop12h 40m

London Heathrow

Tue 19/5

09:30-15:39

1 stop11h 09m

£568

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 21/5

12:45-06:30

1 stop12h 45m

London Heathrow

Thu 28/5

14:05-21:55

1 stop12h 50m

£577

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 19/5

16:20-10:00

1 stop12h 40m

London Heathrow

Sat 30/5

09:30-15:39

1 stop11h 09m

£580

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 27/4

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 4/5

11:55-22:59

1 stop16h 04m

£580

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 23/4

06:00-20:45

1 stop9h 45m

London Heathrow

Wed 6/5

08:15-22:59

1 stop19h 44m

£581

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 £487. 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 £503.

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 £560. 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 £616.

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 £552. 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 £599 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 £645 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 £498 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 28m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport takes 9h 28m
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 28m.

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