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Cheap flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport from £245

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LHR
15 Mar — 22 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Reagan-National to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Reagan-National to Heathrow
Explore the most affordable flight options available from Reagan-National to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 February 2026.

Wed 25/212:55
DCA
-
LHR
1 stop15h 25m
Multiple Airlines
Wed 4/306:50
LHR
-
DCA
2 stops13h 41m
Multiple Airlines
Deal found 11/2£445
Thu 12/311:05
DCA
-
LHR
2 stops19h 00m
Multiple Airlines
Thu 19/306:50
LHR
-
DCA
2 stops19h 06m
Multiple Airlines
Deal found 10/2£445
Sun 1/318:50
DCA
-
LHR
1 stop11h 30m
Air Canada
Tue 10/313:25
LHR
-
DCA
1 stop12h 31m
Air Canada
Deal found 11/2£454
Sun 1/317:00
DCA
-
LHR
1 stop10h 05m
Air France
Tue 10/308:55
LHR
-
DCA
1 stop12h 05m
Air France
Deal found 10/2£455
Wed 25/212:55
DCA
-
LHR
1 stop15h 25m
Air Canada
Wed 11/309:00
LHR
-
DCA
2 stops16h 56m
Air Canada
Deal found 10/2£456
Wed 11/312:55
DCA
-
LHR
2 stops14h 15m
Air Canada
Tue 17/306:50
LHR
-
DCA
2 stops19h 06m
Air Canada
Deal found 10/2£458
Tue 17/212:55
DCA
-
LHR
2 stops13h 15m
Air Canada
Tue 24/206:50
LHR
-
DCA
2 stops13h 41m
Air Canada
Deal found 12/2£458
Tue 17/211:05
DCA
-
LHR
1 stop15h 05m
Air Canada
Wed 25/209:00
LHR
-
DCA
2 stops17h 56m
Air Canada
Deal found 12/2£459
Wed 25/212:55
DCA
-
LHR
1 stop15h 25m
Air Canada
Tue 3/309:00
LHR
-
DCA
2 stops15h 45m
Air Canada
Deal found 10/2£460

Find flight deals from Reagan-National to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 February 2026.

Round-trip from

£421

One-way from

£245

Popular in

June

Cheapest in

October

Average price

£563
Air Canada
  • Air Canada
  • 23/2-3/3
  • 4 total stops
  • 29h 00m total
  • Washington, D.C. to London
Search Deals
25/4
  • 25/4
  • 3 total stops
  • 28h 25m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Reagan-National to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 13 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

Reagan-National

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 21/3

07:00-20:35

1 stop9h 35m

London Heathrow

Thu 26/3

13:25-21:56

1 stop12h 31m

£480

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 12/3

07:00-21:20

1 stop10h 20m

London Heathrow

Fri 20/3

09:10-16:32

1 stop11h 22m

£486

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 1/3

15:40-07:00

1 stop10h 20m

London Heathrow

Tue 10/3

12:55-21:01

1 stop12h 06m

£489

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 27/4

12:55-06:30

1 stop12h 35m

London Heathrow

Wed 6/5

09:30-15:39

1 stop11h 09m

£489

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 26/3

06:00-21:20

1 stop11h 20m

London Heathrow

Fri 3/4

09:30-15:30

1 stop11h 00m

£492

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 25/3

16:30-09:10

1 stop12h 40m

London Heathrow

Thu 2/4

09:30-18:03

2 stops13h 33m

£495

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 7/3

06:00-21:20

1 stop10h 20m

London Heathrow

Thu 12/3

09:00-22:52

2 stops17h 52m

£500

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 13/3

07:00-20:35

1 stop9h 35m

London Heathrow

Fri 20/3

13:25-21:56

1 stop12h 31m

£503

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 14/3

19:00-05:55

1 stop30h 55m

London Heathrow

Sat 28/3

13:25-10:19

1 stop24h 54m

£504

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 6/8

06:30-20:45

1 stop9h 15m

£253

Flights are sorted by cheapest return flights first.

Deals found on 13/2

Showing 1-10 of 21 results
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Best time to book a flight from Reagan-National to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Reagan-National with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from Reagan-National to Heathrow. Price data was last updated on 6 February 2026.

The best time to book flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of £23). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in June is currently the most expensive (average of £608). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

    For as low as £480, United Airlines can have you in London Heathrow Airport from Washington, D.C. Reagan-National Airport in 9h 35m. Washington, D.C. Reagan-National Airport and London Heathrow Airport are separated by a distance of 3652 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Reagan-National to Heathrow that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Heathrow.

  • Can I find deals for business class flights from Reagan-National to Heathrow?

    Yes. Cheapflights offers flight deals from Reagan-National to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of £23). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in June is currently the most expensive (average of £608). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Ipswich
Swindon

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How does Cheapflights help users find flights from Reagan-National to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Reagan-National to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Reagan-National to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Reagan-National by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Reagan-National to Heathrow with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Reagan-National to Heathrow, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Reagan-National to Heathrow become cheaper?

Not ready to book yet? You can track prices for flights from Reagan-National to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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