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Cheap flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport from £281

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 24/1. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LHR
11 Jan — 18 Jan1
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 12 December 2025.

Tue 30/1216:10DCA - LHR
1 stop10h 00mMultiple Airlines
Wed 14/106:50LHR - DCA
2 stops13h 41mMultiple Airlines
Deal found 11/12£447
Tue 30/1211:05DCA - LHR
1 stop15h 05mAir Canada
Wed 14/106:50LHR - DCA
2 stops13h 41mAir Canada
Deal found 10/12£456
Mon 29/1218:00DCA - LHR
1 stop32h 55mUnited Airlines
Fri 9/113:25LHR - DCA
1 stop31h 06mUnited Airlines
Deal found 10/12£466
Wed 31/1211:05DCA - LHR
1 stop15h 05mAir Canada
Wed 14/112:00LHR - DCA
1 stop29h 19mAir Canada
Deal found 11/12£476
Tue 30/1216:10DCA - LHR
1 stop10h 00mUnited Airlines
Thu 15/113:25LHR - DCA
1 stop13h 31mUnited Airlines
Deal found 10/12£478
Tue 30/1216:10DCA - LHR
1 stop10h 00mAir Canada
Thu 15/109:00LHR - DCA
2 stops14h 05mAir Canada
Deal found 10/12£480
Mon 29/1216:45DCA - LHR
1 stop9h 10mJetBlue
Thu 15/112:20LHR - DCA
1 stop15h 39mJetBlue
Deal found 10/12£488
Tue 30/1213:44DCA - LHR
1 stop11h 51mBritish Airways
Wed 7/119:25LHR - DCA
2 stops31h 05mBritish Airways
Deal found 11/12£512
Mon 29/1214:00DCA - LHR
1 stop11h 55mJetBlue
Mon 12/109:20LHR - DCA
1 stop11h 59mJetBlue
Deal found 10/12£514
Mon 29/1220:40DCA - LHR
1 stop28h 50mAir Canada
Sun 11/112:00LHR - DCA
1 stop29h 19mAir Canada
Deal found 10/12£515

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 12 December 2025.

Round-trip from

£432

One-way from

£281

Popular in

June

Cheapest in

January

Average price

£687
Scandinavian Airlines
  • Scandinavian Airlines
  • 19/1-22/1
  • 4 total stops
  • 56h 58m total
  • Washington, D.C. to London
Search Deals
24/1
  • 24/1
  • 3 total stops
  • 24h 51m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£76 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 12 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

Reagan-National

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 10/3

11:00-09:20

2 stops18h 20m

London Heathrow

Mon 16/3

06:40-22:36

2 stops19h 56m

£449

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 30/1

11:10-09:20

2 stops17h 10m

London Heathrow

Tue 3/2

06:40-19:52

2 stops18h 12m

£449

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 3/3

11:06-09:20

2 stops17h 14m

London Heathrow

Sat 7/3

06:40-22:12

2 stops20h 32m

£449

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 13/3

11:00-06:20

1 stop15h 20m

London Heathrow

Thu 19/3

06:30-17:49

2 stops15h 19m

£470

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 23/1

17:00-10:15

1 stop12h 15m

London Heathrow

Mon 26/1

06:30-17:04

2 stops15h 34m

£470

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 11/1

11:10-16:00

2 stops23h 50m

London Heathrow

Wed 14/1

19:30-22:48

2 stops32h 18m

£471

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 14/1

20:00-05:55

1 stop28h 55m

London Heathrow

Mon 19/1

13:25-10:23

1 stop25h 58m

£472

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 4/3

15:40-06:55

1 stop10h 15m

London Heathrow

Sat 14/3

09:20-21:15

1 stop15h 55m

£476

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 10/3

14:05-06:55

1 stop12h 50m

London Heathrow

Mon 16/3

09:20-17:18

1 stop11h 58m

£476

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 13/2

06:00-20:45

1 stop9h 45m

London Heathrow

Tue 17/2

09:20-16:04

1 stop11h 44m

£476

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Showing 1-10 of 23 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 5 December 2025.

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 £624). 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.

How much does it cost for a return flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

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 £470, Scandinavian Airlines can have you in London Heathrow Airport from Washington, D.C. Reagan-National Airport in 15h 20m. 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 £624). 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
Slough
Northampton
Hounslow
Luton
Gatwick
Wembley
Ilford
Brentford
Colchester
Watford
Hayes
Crawley
Winchester
Swindon
Deal
Bedford
Romford
Chichester

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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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