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

United Airlines, KLM, and Scandinavian Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 7h 35m. Your travel time can differ by up to 7h 30m. The distance between Washington, D.C. and London Heathrow Airport is about 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

Currently priced at £430, British Airways will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Icelandair - these airlines can fly you to your destination from £451 and £492, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 37% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Washington, D.C. to London Heathrow Airport one-way?

One-way options have recently been found by users for as low as £214 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £243 and United Airlines from £294 one-way.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Washington, D.C. to London Heathrow Airport?

Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow or Washington, D.C. Reagan-National - London Heathrow when deciding on the best route from Washington, D.C. to London Heathrow Airport.

What are the cheapest flights from Washington, D.C. to London Heathrow Airport?

While on average a flight from Washington, D.C. to London Heathrow Airport is generally £583, our data shows the cheapest flight currently is £243. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £260 for that flight.

What are the most reliable airlines from Washington, D.C. to London Heathrow Airport?

No one likes to see their flight delayed. When booking a flight from Washington, D.C. to London Heathrow Airport consider choosing Aer Lingus (73%), Iberia (73%) or KLM (68%) as they are the most reliable in getting you off to your destination on time.

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

British Airways, United Airlines and Virgin Atlantic are the most popular airlines when flying from Washington, D.C. to London Heathrow Airport.

Can I find deals for flights from Washington, D.C. to Heathrow that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Heathrow?

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

Can I find deals for business class flights from Washington, D.C. to Heathrow?

Yes. Cheapflights offers flight deals from Washington, D.C. 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.

£210+ Cheap Flights from Washington, D.C. to London Heathrow Airport

Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in February or January, booked 86 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Washington, D.C. to Heathrow

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Washington, D.C. to Heathrow
Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Thu 24/1219:40 -

1 stop10h 10m

Thu 7/112:15 -

1 stop11h 25m

Deal found 19/9£518

Wed 25/1119:40 -

1 stop18h 50m

Mon 30/1120:35 -

1 stop27h 05m

Deal found 20/9£519

Wed 18/1118:05 -

Nonstop7h 10m

Wed 25/1107:35 -

1 stop13h 45m

Deal found 16/9£521

Sat 7/1119:40 -

2 stops17h 50m

Thu 12/1106:40 -

2 stops16h 50m

Deal found 16/9£522

Thu 29/1020:40 -

2 stops20h 40m

Tue 3/1107:05 -

2 stops16h 35m

Deal found 18/9£523

Wed 14/1022:25 -

Nonstop7h 25m

Thu 10/1207:30 -

1 stop13h 50m

Deal found 19/9£523

Wed 7/1020:55 -

1 stop11h 35m

Fri 16/1009:50 -

1 stop10h 55m

Deal found 16/9£523

Mon 9/1112:55 -

1 stop12h 35m

Tue 24/1113:00 -

1 stop13h 59m

Deal found 18/9£524

Tue 20/1020:30 -

2 stops17h 00m

Wed 28/1006:40 -

2 stops17h 00m

Deal found 17/9£525

Tue 3/1111:05 -

1 stop15h 05m

Tue 10/1113:00 -

1 stop13h 59m

Deal found 19/9£525

Mon 28/918:15 -

1 stop10h 10m

Wed 7/1007:50 -

1 stop12h 40m

Deal found 18/9£525

Tue 10/1119:40 -

2 stops15h 45m

Sat 14/1106:40 -

2 stops17h 00m

Deal found 17/9£526

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Wed 9/1222:15 -

Nonstop7h 35m

Fri 25/1209:00 -

1 stop13h 00m

Deal found 17/9£530

Wed 14/1012:37 -

1 stop13h 33m

Wed 21/1009:40 -

1 stop13h 10m

Deal found 19/9£555

Sat 17/1020:20 -

2 stops15h 05m

Thu 22/1019:30 -

1 stop26h 30m

Deal found 15/9£564

Wed 28/1012:01 -

1 stop15h 04m

Mon 2/1110:00 -

1 stop10h 55m

Deal found 15/9£581

Wed 4/1118:55 -

Nonstop7h 25m

Sun 8/1113:05 -

Nonstop8h 40m

Deal found 17/9£581

Fri 2/1017:05 -

1 stop10h 45m

Sun 11/1016:20 -

1 stop12h 17m

Deal found 17/9£631

Fri 11/1206:00 -

1 stop9h 00m

Sat 26/1216:30 -

1 stop12h 33m

Deal found 19/9£667

Mon 12/1006:20 -

1 stop9h 25m

Fri 6/1112:20 -

1 stop14h 55m

Deal found 15/9£667

Tue 3/1122:15 -

Nonstop7h 35m

Tue 10/1106:50 -

1 stop12h 40m

Deal found 16/9£537

Mon 26/1021:30 -

2 stops14h 55m

Tue 3/1117:30 -

2 stops28h 45m

Deal found 17/9£566

Fri 2/1017:05 -

1 stop10h 45m

Wed 7/1006:30 -

2 stops15h 09m

Deal found 16/9£588

Wed 30/908:15 -

1 stop19h 20m

Thu 8/1012:15 -

Nonstop8h 15m

Deal found 20/9£544

Fri 2/1009:45 -

2 stops16h 00m

Mon 5/1011:30 -

2 stops16h 31m

Deal found 18/9£626

Sun 27/914:03 -

1 stop12h 12m

Mon 5/1016:05 -

1 stop11h 26m

Deal found 15/9£594

Tue 27/1019:20 -

Nonstop7h 20m

Tue 3/1116:20 -

Nonstop8h 55m

Deal found 15/9£546

Mon 12/1006:20 -

1 stop9h 25m

Wed 11/1112:20 -

1 stop14h 55m

Deal found 15/9£667

Thu 1/1006:10 -

1 stop9h 00m

Sun 4/1012:50 -

1 stop15h 09m

Deal found 19/9£630

Wed 21/1011:05 -

2 stops17h 30m

Sun 25/1017:00 -

2 stops32h 55m

Deal found 15/9£646

Tue 6/1012:37 -

2 stops16h 43m

Sun 11/1011:15 -

1 stop18h 36m

Deal found 19/9£596

Sun 17/106:00 -

1 stop9h 55m

Wed 20/112:20 -

1 stop15h 35m

Deal found 18/9£673

Mon 28/909:09 -

2 stops40h 21m

Mon 5/1011:05 -

2 stops36h 08m

Deal found 15/9£561

Thu 22/1018:32 -

1 stop13h 43m

Sun 25/1008:55 -

1 stop19h 56m

Deal found 19/9£632

Thu 12/1118:20 -

Nonstop7h 20m

Mon 16/1113:45 -

1 stop32h 15m

Deal found 19/9£567

Thu 15/1018:35 -

Nonstop7h 20m

Thu 22/1008:45 -

1 stop13h 00m

Deal found 15/9£568

Wed 7/1014:11 -

1 stop18h 04m

Sun 11/1009:20 -

1 stop20h 31m

Deal found 16/9£705

Mon 5/1018:19 -

1 stop9h 56m

Mon 12/1012:25 -

1 stop15h 58m

Deal found 15/9£773

Thu 1/1022:40 -

1 stop17h 00m

Thu 8/1012:15 -

Nonstop8h 15m

Deal found 18/9£586

Fri 16/1010:21 -

2 stops15h 24m

Sun 25/1010:50 -

1 stop18h 01m

Deal found 18/9£741

Thu 15/1011:55 -

1 stop13h 50m

Mon 26/1011:05 -

2 stops35h 58m

Deal found 19/9£594

Thu 18/309:55 -

1 stop17h 15m

Thu 25/312:05 -

Nonstop8h 35m

Deal found 18/9£595

Find flight deals from Washington, D.C. to Heathrow

Round-trip from	£519
One-way from	£210
Popular in	June
Cheapest in	February
Average price	£737
Good round-trip deal	£696 or less
Good one-way deal	£352 or less

Icelandair
25/11-30/11
2 total stops
45h 55m total
Washington, D.C. to London

Search Deals

Icelandair
27/10-31/12
1 total stop
10h 10m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£120 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from Washington, D.C. (WAS) to London Heathrow.

Search Deals

Price to beat on a one-way flight from Washington, D.C. (WAS) to London Heathrow.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. 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 Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Fri 13/11

13:09-06:55

1 stop12h 46m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 17/3

16:00-10:30

2 stops14h 30m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Mon 2/11

13:09-06:55

1 stop12h 46m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Tue 27/10

12:00-06:55

1 stop14h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sat 14/11

06:15-21:40

1 stop10h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Mon 30/11

11:00-06:55

1 stop14h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sun 29/11

06:00-20:55

1 stop9h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Tue 15/12

11:25-07:10

2 stops14h 45m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£271

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 19/3

09:55-07:10

1 stop17h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£282

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sat 26/9

06:30-20:45

1 stop9h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£298

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Washington, D.C. to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington, D.C. with our price prediction graph.

WAS-LHR

DCA-LHR

IAD-LHR

BWI-LHR

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. to London Heathrow Airport

WAS-LHR

DCA-LHR

IAD-LHR

BWI-LHR

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £515). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £976). 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 WAS to LHR?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to London Heathrow Airport as you normally would.

Weekly flight availability from Washington, D.C. to London Heathrow Airport

The most flights from WAS to LHR are scheduled on a Tuesday (29 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between £565 and £826 in November.
The cheapest return price found within the last 5 days was £519 on Icelandair (25 Nov–30 Nov).

What’s the top stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Dublin (DUB) – chosen by Cheapflights users on 61% of one-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £498.

What’s the fastest stopover option from Washington, D.C. to London Heathrow Airport?

Flights via New York (JFK) have the shortest average one-way travel time for one-stop routes: 9h 00m.

Which airport typically offers the quickest stopover for flights from Washington, D.C. to London Heathrow Airport?

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 15m.

How often are flights from Washington, D.C. to London delayed?

About 17% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 170 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines,Aer Lingus, andAmerican Airlines from Washington, D.C. to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

United Airlines

7.4

Good

10,225 reviews

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Aer Lingus

7.3

Good

1,777 reviews

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

American Airlines

7.0

Good

12,072 reviews

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Icelandair

6.9

Okay

747 reviews

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

British Airways

6.7

Okay

8,225 reviews

United Airlines

7.4

Good

10,225 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?
United Airlines, KLM, and Scandinavian Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 7h 35m. Your travel time can differ by up to 7h 30m. The distance between Washington, D.C. and London Heathrow Airport is about 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Washington, D.C. to London Heathrow Airport round-trip?
Currently priced at £430, British Airways will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Icelandair - these airlines can fly you to your destination from £451 and £492, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 37% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Washington, D.C. to London Heathrow Airport one-way?
One-way options have recently been found by users for as low as £214 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £243 and United Airlines from £294 one-way.
What are the most popular routes from Washington, D.C. to London Heathrow Airport?
Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow or Washington, D.C. Reagan-National - London Heathrow when deciding on the best route from Washington, D.C. to London Heathrow Airport.
What are the most reliable airlines from Washington, D.C. to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from Washington, D.C. to London Heathrow Airport consider choosing Aer Lingus (73%), Iberia (73%) or KLM (68%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Washington, D.C. to London Heathrow Airport?
While on average a flight from Washington, D.C. to London Heathrow Airport is generally £583, our data shows the cheapest flight currently is £243. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £260 for that flight.
Can I find deals for flights from Washington, D.C. to Heathrow that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Heathrow.
Can I find deals for business class flights from Washington, D.C. to Heathrow?
Yes. Cheapflights offers flight deals from Washington, D.C. 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. to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £515). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £976). 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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Luton

Milton Keynes

Gatwick

Wembley

Slough

Ilford

Hayes

Croydon

Northampton

Colchester

Eastbourne

Enfield

Brentford

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Barnet

Southall

Watford

Stratford-upon-Avon

Kingston upon Thames

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Alternative routes for Washington, D.C. to Heathrow

Dulles Intl to Heathrow flights

Dulles Intl to Gatwick flights

Dulles Intl to London City flights

Reagan-National to Heathrow flights

Reagan-National to Gatwick flights

Dulles Intl to Luton flights

Reagan-National to Stansted flights

Reagan-National to Luton flights

Top 5 airlines flying from Washington, D.C. to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£232	Average£630	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£430	Average£650	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£451	Average£593	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£494	Average£724	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	Cheapest£595	Average£965	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

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How does Cheapflights help users find flights from Washington, D.C. to Heathrow?

When you search for this flight from Washington, D.C. to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Washington, D.C. 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 Washington, D.C. to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Washington, D.C. to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Heathrow become cheaper?

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

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Cheap flights from Washington, D.C. to London Heathrow Airport from £210

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Washington, D.C. to Heathrow

Cheapest flights from Washington, D.C. to HeathrowExplore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Best flights from Washington, D.C. to HeathrowDiscover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Direct flights from Washington, D.C. to HeathrowExplore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 September 2026.

Explore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 September 2026.

Last-minute flights from Washington, D.C. to HeathrowDiscover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 20 September 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 20 September 2026 and is based on user searches.

One-way flights from Washington, D.C. to HeathrowSearch for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to London Heathrow Airport that are best for you.

Best time to book a flight from Washington, D.C. to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington, D.C. with our price prediction graph.

Cheapflights Insights

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

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

Find hourly flight availability from Washington, D.C. to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 September 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to London Heathrow Airport as you normally would.

Weekly flight availability from Washington, D.C. to London Heathrow Airport

The most flights from WAS to LHR are scheduled on a Tuesday (29 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between £565 and £826 in November.The cheapest return price found within the last 5 days was £519 on Icelandair (25 Nov–30 Nov).

What’s the top stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Share of one-stop return flights from Washington, D.C. to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 61% of one-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Average return fare for one-stop flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £498.

What’s the fastest stopover option from Washington, D.C. to London Heathrow Airport?

Shortest average travel time for one-stop one-way flights from Washington, D.C. to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via New York (JFK) have the shortest average one-way travel time for one-stop routes: 9h 00m.

Which airport typically offers the quickest stopover for flights from Washington, D.C. to London Heathrow Airport?

Average stopover duration for one-stop one-way flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 15m.

How often are flights from Washington, D.C. to London delayed?

About 17% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 170 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines,Aer Lingus, andAmerican Airlines from Washington, D.C. to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

What are the cheapest airlines to fly from Washington, D.C. to London Heathrow Airport one-way?

What are the most popular routes from Washington, D.C. to London Heathrow Airport?

What are the most reliable airlines from Washington, D.C. to London Heathrow Airport?

What are the cheapest flights from Washington, D.C. to London Heathrow Airport?

Can I find deals for flights from Washington, D.C. to Heathrow that include hotel bookings?

How can I find direct flights from Washington, D.C. to Heathrow?

Can I find deals for business class flights from Washington, D.C. to Heathrow?

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

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to Heathrow

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

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Washington, D.C. to Heathrow by cabin class

Cheapest flights from Washington, D.C. to Heathrow
Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 September 2026.

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Direct flights from Washington, D.C. to Heathrow
Explore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 September 2026.

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 20 September 2026 and is based on user searches.

One-way flights from Washington, D.C. to Heathrow
Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

Washington, D.C. to London Heathrow Airport flights typically cost between £565 and £826 in November.
The cheapest return price found within the last 5 days was £519 on Icelandair (25 Nov–30 Nov).