In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular airlines that fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

American Airlines, Air Canada and JetBlue are the most popular airlines when flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport.

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 vacation 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.

$272+ Flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport

Q: What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport?

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to London Heathrow Airport flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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Find cheap flights from Reagan-National to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to London Heathrow are usually found in January or October, booked 44 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Reagan-National to Heathrow

Round-trip from	$538 (Ticket)
One-way from	$272 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$698

From Washington, D.C. Reagan-National to London Heathrow

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One-way flight from Washington, D.C. Reagan-National to London Heathrow

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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Reagan-National to Heathrow

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 September 17, 2025.

Sun 9/288:40 pmDCA - LHR

1 stop11h 50mVirgin Atlantic

Tue 10/712:45 pmLHR - DCA

1 stop11h 55mVirgin Atlantic

Deal found 9/16

$538

Sun 9/289:40 amDCA - LHR

1 stop15h 50mAir Canada

Tue 10/73:50 pmLHR - DCA

1 stop11h 44mAir Canada

Deal found 9/16

$541

Mon 10/63:00 pmDCA - LHR

1 stop9h 55mUnited Airlines

Wed 10/2212:00 pmLHR - DCA

1 stop14h 37mUnited Airlines

Deal found 9/16

$557

Mon 10/64:35 pmDCA - LHR

1 stop12h 00mAir Canada

Wed 10/229:30 amLHR - DCA

1 stop17h 21mAir Canada

Deal found 9/16

$561

Mon 9/2212:55 pmDCA - LHR

1 stop12h 35mAir Canada

Tue 9/309:30 amLHR - DCA

1 stop11h 21mAir Canada

Deal found 9/15

$563

Mon 10/1312:55 pmDCA - LHR

1 stop12h 35mMultiple Airlines

Wed 12/311:10 amLHR - DCA

2 stops15h 46mMultiple Airlines

Deal found 9/16

$570

Wed 12/312:55 pmDCA - LHR

2 stops13h 15mMultiple Airlines

Wed 12/1011:10 amLHR - DCA

2 stops15h 46mMultiple Airlines

Deal found 9/15

$572

Best flights from Reagan-National to Heathrow
Discover carefully curated flight deals from Reagan-National to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2025.

Wed 10/1512:55 pmDCA - LHR

1 stop14h 40mUnited Airlines

Wed 10/229:30 amLHR - DCA

1 stop11h 21mUnited Airlines

Deal found 9/16

$588

Tue 9/235:00 pmDCA - LHR

1 stop11h 15mDelta

Wed 10/89:40 amLHR - DCA

1 stop12h 30mDelta

Deal found 9/17

$598

Sun 11/22:26 pmDCA - LHR

1 stop11h 39mVirgin Atlantic

Wed 12/34:00 pmLHR - DCA

1 stop12h 58mVirgin Atlantic

Deal found 9/16

$602

Sun 9/284:00 pmDCA - LHR

1 stop9h 45mUnited Airlines

Tue 10/79:30 amLHR - DCA

1 stop17h 21mUnited Airlines

Deal found 9/16

$589

Wed 9/244:45 pmDCA - LHR

1 stop10h 20mDelta

Tue 10/74:50 pmLHR - DCA

1 stop11h 14mDelta

Deal found 9/17

$598

Tue 10/146:50 pmDCA - LHR

1 stop10h 10mUnited Airlines

Tue 10/213:50 pmLHR - DCA

1 stop11h 44mUnited Airlines

Deal found 9/15

$600

Wed 11/196:06 amDCA - LHR

1 stop9h 04mDelta

Wed 12/31:05 pmLHR - DCA

1 stop11h 41mDelta

Deal found 9/16

$602

Wed 9/247:20 pmDCA - LHR

1 stop11h 45mDelta

Tue 9/304:50 pmLHR - DCA

1 stop11h 51mDelta

Deal found 9/15

$602

Mon 9/224:45 pmDCA - LHR

1 stop10h 20mDelta

Thu 10/212:45 pmLHR - DCA

1 stop11h 59mDelta

Deal found 9/16

$602

Sun 11/236:45 pmDCA - LHR

1 stop11h 40mDelta

Wed 12/34:00 pmLHR - DCA

1 stop11h 12mDelta

Deal found 9/16

$602

Last-minute flights from Reagan-National to Heathrow
Discover last-minute flight deals from Reagan-National to Heathrow. Data last updated September 17, 2025 and is based on user searches.

Mon 9/2212:55 pmDCA - LHR

1 stop12h 35mAir Canada

Tue 9/309:30 amLHR - DCA

1 stop11h 21mAir Canada

Deal found 9/15

$563

Sun 9/288:40 pmDCA - LHR

1 stop11h 50mVirgin Atlantic

Tue 10/712:45 pmLHR - DCA

1 stop11h 55mVirgin Atlantic

Deal found 9/16

$538

Sun 9/289:40 amDCA - LHR

1 stop15h 50mAir Canada

Tue 10/73:50 pmLHR - DCA

1 stop11h 44mAir Canada

Deal found 9/16

$541

Mon 10/63:00 pmDCA - LHR

1 stop9h 55mUnited Airlines

Wed 10/2212:00 pmLHR - DCA

1 stop14h 37mUnited Airlines

Deal found 9/16

$557

Mon 10/64:35 pmDCA - LHR

1 stop12h 00mAir Canada

Wed 10/229:30 amLHR - DCA

1 stop17h 21mAir Canada

Deal found 9/16

$561

Mon 10/1312:55 pmDCA - LHR

1 stop12h 35mMultiple Airlines

Wed 12/311:10 amLHR - DCA

2 stops15h 46mMultiple Airlines

Deal found 9/16

$570

One-way flights from Reagan-National to Heathrow
Search for one-way flight options from Reagan-National to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 17, 2025.

Tue 9/3012:15 pmDCA - LHR

2 stops16h 05mScandinavian Airlines

Deal found 9/15

$272

Mon 10/66:05 amDCA - LHR

2 stops31h 45mScandinavian Airlines

Deal found 9/15

$278

Mon 9/296:05 amDCA - LHR

2 stops31h 45mScandinavian Airlines

Deal found 9/17

$279

Sun 10/129:40 amDCA - LHR

2 stops21h 25mMultiple Airlines

Deal found 9/17

$284

Tue 10/71:15 pmDCA - LHR

2 stops15h 05mScandinavian Airlines

Deal found 9/15

$285

Mon 10/2712:55 pmDCA - LHR

2 stops19h 55mMultiple Airlines

Deal found 9/16

$289

Thu 10/303:09 pmDCA - LHR

1 stop11h 46mJetBlue

Deal found 9/15

$292

Mon 11/1011:10 amDCA - LHR

2 stops29h 30mScandinavian Airlines

Deal found 9/15

$294

Mon 10/136:25 amDCA - LHR

1 stop9h 20mJetBlue

Deal found 9/15

$295

Wed 10/155:20 pmDCA - LHR

1 stop11h 10mJetBlue

Deal found 9/15

$296

Tue 10/1411:15 amDCA - LHR

1 stop14h 15mJetBlue

Deal found 9/15

$299

Fri 11/285:44 pmDCA - LHR

1 stop10h 46mJetBlue

Deal found 9/15

$302

Cheapflights Fare Finder

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

Wed 10/15

12:55 pm-8:35 am

1 stop14h 40m

London Heathrow

Wed 10/22

9:30 am-3:51 pm

1 stop11h 21m

$588

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 9/28

4:00 pm-6:45 am

1 stop9h 45m

London Heathrow

Tue 10/7

9:30 am-9:51 pm

1 stop17h 21m

$589

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 9/23

5:00 pm-9:15 am

1 stop11h 15m

London Heathrow

Wed 10/8

9:40 am-5:10 pm

1 stop12h 30m

$598

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 9/24

4:45 pm-8:05 am

1 stop10h 20m

London Heathrow

Tue 10/7

4:50 pm-11:04 pm

1 stop11h 14m

$598

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 10/14

6:50 pm-10:00 am

1 stop10h 10m

London Heathrow

Tue 10/21

3:50 pm-10:34 pm

1 stop11h 44m

$600

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 11/2

2:26 pm-7:05 am

1 stop11h 39m

London Heathrow

Wed 12/3

4:00 pm-11:58 pm

1 stop12h 58m

$602

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 11/19

6:06 am-8:10 pm

1 stop9h 04m

London Heathrow

Wed 12/3

1:05 pm-7:46 pm

1 stop11h 41m

$602

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 9/24

7:20 pm-12:05 pm

1 stop11h 45m

London Heathrow

Tue 9/30

4:50 pm-11:41 pm

1 stop11h 51m

$602

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 9/22

4:45 pm-8:05 am

1 stop10h 20m

London Heathrow

Thu 10/2

12:45 pm-7:44 pm

1 stop11h 59m

$602

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 11/23

6:45 pm-11:25 am

1 stop11h 40m

London Heathrow

Wed 12/3

4:00 pm-10:12 pm

1 stop11h 12m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 results

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 round-trip 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?

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, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of $661). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.

What is the cheapest time of day to fly from DCA to LHR?

It’s optimal to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport in the afternoon. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Heathrow

Read reviews from past customers who have flown United Airlines, American Airlines, and JetBlue from Washington, D.C. Reagan-National Airport to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,926 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

American Airlines

7.2

Good

10,000 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

JetBlue

7.2

Good

2,914 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

British Airways

6.7

Okay

7,367 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

How long is the flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport?
For as low as $598, United Airlines can have you in London Heathrow Airport from Washington, D.C. Reagan-National Airport in 11h 15m. The distance from Washington, D.C. Reagan-National Airport to London Heathrow Airport is about 3652 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport round-trip?
According to our current data, JetBlue ($31), Delta ($421), and American Airlines ($497) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to London Heathrow Airport. JetBlue is currently priced 96% below the average price you’ll pay for this route.
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 vacation 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, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of $661). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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

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Harrow

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Broadway

Aylesbury

Bedford

Wembley

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Chichester

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Top 8 airlines flying from Reagan-National to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$31	Average$806	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$421	Average$701	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$497	Average$945	FlexibilityNo cancel fee	On-time72%
American Airlines	Cheapest$497	Average$912	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$529	Average$756	FlexibilityNo cancel fee	On-time70%
Iberia	Cheapest$562	Average$695	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$599	Average$872	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$645	Average$707	FlexibilityNo cancel fee	On-time67%

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$272+ Cheap flights from Reagan-National (DCA) to Heathrow (LHR)

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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Reagan-National to Heathrow with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to London Heathrow are usually found in January or October, booked 44 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Reagan-National to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Reagan-National to Heathrow

Cheapest flights from Reagan-National to HeathrowExplore 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 September 17, 2025.

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 September 17, 2025.

Cheapflights Fare Finder

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.

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.

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?

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

What is the cheapest time of day to fly from DCA to LHR?

Reviews of airlines servicing Heathrow

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?

What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport round-trip?

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

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

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

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

Traveling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Reagan-National to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from Reagan-National to Heathrow

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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 September 17, 2025.