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

Icelandair, Scandinavian Airlines, and United Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 10h 10m. Your travel time can differ by up to 5h 40m. 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 £305, Lufthansa will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £363 and £377, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 45% 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 £217 on JetBlue. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £258 and Icelandair from £263 one-way.

What is the cheapest day to fly from Washington, D.C. to London Heathrow Airport?

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

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 £631, our data shows the cheapest flight currently is £310. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £312 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 Aeromexico (100%), KLM (80%) or Air France (80%) 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?

Air France, British Airways and Icelandair are the most popular airlines when flying from Washington, D.C. to London Heathrow Airport.

What is the cheapest day to fly round-trip from Washington, D.C. to London Heathrow Airport?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 21% when planning your travel around this day of the week.

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

September is one of the best times of the year to fly to London Heathrow Airport from Washington, D.C.. Prices for September average £539 per person but you can even find prices for as low as £325. The most expensive prices can be found in the month of June. Opting for a September flight can save you 29% on your journey compared to booking in June

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.

£167+ 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 August or September, booked 63 days in advance, depart on a Wednesday or Monday and return on a Wednesday

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

Round-trip from	£358
One-way from	£167
Popular in	June
Cheapest in	August
Average price	£486
Good round-trip deal	£481 or less
Good one-way deal	£269 or less

Icelandair
28/9-7/10
2 total stops
58h 35m total
Washington, D.C. to London

Search Deals

13/10
2 total stops
36h 19m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£72 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

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

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

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 16 September 2025.

Sun 28/923:15IAD - LHR

1 stop31h 40mIcelandair

Tue 7/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£358

Wed 12/1120:30IAD - LHR

2 stops35h 25mScandinavian Airlines

Sat 15/1106:40LHR - IAD

2 stops17h 10mScandinavian Airlines

Deal found 16/9£359

Wed 1/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£361

Sat 4/1020:30IAD - LHR

1 stop10h 25mIcelandair

Tue 14/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£364

Tue 11/1119:40IAD - LHR

1 stop18h 50mIcelandair

Sat 22/1120:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£365

Wed 1/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 29/1012:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£366

Tue 30/920:30IAD - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 14/9£366

Wed 12/1119:40IAD - LHR

1 stop10h 10mIcelandair

Sun 16/1120:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 14/9£367

Mon 3/1119:40IAD - LHR

1 stop10h 10mIcelandair

Wed 4/312:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£368

Fri 10/1023:15IAD - LHR

1 stop31h 40mIcelandair

Wed 15/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£369

Fri 3/1020:30BWI - LHR

1 stop10h 25mIcelandair

Fri 10/1021:25LHR - BWI

1 stop27h 00mIcelandair

Deal found 14/9£389

Wed 1/1020:30BWI - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - BWI

1 stop27h 00mIcelandair

Deal found 14/9£390

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 16 September 2025.

Wed 5/1119:40IAD - LHR

1 stop10h 10mIcelandair

Wed 12/1112:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 15/9£384

Sun 8/212:30IAD - LHR

2 stops15h 50mScandinavian Airlines

Wed 11/306:40LHR - IAD

1 stop15h 35mScandinavian Airlines

Deal found 15/9£393

Fri 6/212:55IAD - LHR

2 stops13h 15mUnited Airlines

Sun 8/206:50LHR - IAD

1 stop12h 45mUnited Airlines

Deal found 15/9£417

Wed 1/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 15/1011:30LHR - IAD

1 stop12h 45mVirgin Atlantic

Deal found 14/9£427

Mon 13/1021:35BWI - LHR

Nonstop7h 15mBritish Airways

Fri 5/1215:25LHR - BWI

Nonstop8h 20mBritish Airways

Deal found 13/9£432

Wed 15/1009:00BWI - LHR

1 stop20h 30mDelta

Tue 21/1009:55LHR - BWI

2 stops18h 18mDelta

Deal found 14/9£438

Sun 7/1219:40IAD - LHR

1 stop10h 10mIcelandair

Thu 8/120:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£386

Sat 24/112:30IAD - LHR

2 stops15h 50mScandinavian Airlines

Sun 1/221:05LHR - IAD

2 stops25h 10mScandinavian Airlines

Deal found 15/9£398

Wed 26/1118:20IAD - LHR

Nonstop7h 20mUnited Airlines

Mon 8/1213:45LHR - IAD

1 stop31h 55mUnited Airlines

Deal found 15/9£419

Tue 30/921:35BWI - LHR

Nonstop7h 15mBritish Airways

Wed 8/1016:35LHR - BWI

Nonstop8h 10mBritish Airways

Deal found 15/9£432

Wed 8/1009:00BWI - LHR

1 stop16h 45mDelta

Tue 14/1011:45LHR - BWI

2 stops16h 28mDelta

Deal found 14/9£438

Tue 14/1012:09IAD - LHR

2 stops16h 26mScandinavian Airlines

Tue 21/1006:40LHR - IAD

1 stop18h 19mScandinavian Airlines

Deal found 14/9£407

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 16 September 2025.

Sun 28/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 7/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 16/9£400

Wed 29/1019:20IAD - LHR

Nonstop7h 20mLufthansa

Wed 5/1112:05LHR - IAD

Nonstop8h 30mLufthansa

Deal found 14/9£403

Wed 15/1018:40IAD - LHR

Nonstop7h 15mLufthansa

Tue 21/1012:15LHR - IAD

Nonstop8h 15mLufthansa

Deal found 15/9£405

Wed 29/1023:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 5/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Deal found 14/9£414

Wed 5/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 12/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Deal found 15/9£415

Wed 5/1120:35BWI - LHR

Nonstop7h 05mFinnair

Wed 12/1115:25LHR - BWI

Nonstop8h 20mFinnair

Deal found 15/9£422

Tue 14/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 21/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 14/9£426

Mon 13/1021:35BWI - LHR

Nonstop7h 15mBritish Airways

Wed 22/1016:35LHR - BWI

Nonstop8h 10mBritish Airways

Deal found 14/9£428

Wed 1/1022:45IAD - LHR

Nonstop7h 20mBritish Airways

Wed 15/1012:45LHR - IAD

Nonstop8h 10mBritish Airways

Deal found 14/9£428

Mon 13/1021:35BWI - LHR

Nonstop7h 15mBritish Airways

Wed 3/1215:25LHR - BWI

Nonstop8h 20mBritish Airways

Deal found 16/9£428

Mon 29/919:25IAD - LHR

Nonstop7h 20mBritish Airways

Fri 10/1017:00LHR - IAD

Nonstop8h 15mBritish Airways

Deal found 16/9£428

Wed 5/1120:35BWI - LHR

Nonstop7h 05mFinnair

Thu 13/1115:25LHR - BWI

Nonstop8h 20mFinnair

Deal found 16/9£430

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 16 September 2025 and is based on user searches.

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 7/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£365

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Thu 9/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£369

Sun 28/923:15IAD - LHR

1 stop31h 40mIcelandair

Tue 7/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£358

Tue 30/920:30IAD - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 14/9£366

Wed 1/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£361

Wed 1/1023:15IAD - LHR

1 stop16h 05mIcelandair

Wed 15/1013:05LHR - IAD

1 stop14h 05mIcelandair

Deal found 14/9£366

Fri 3/1020:30BWI - LHR

1 stop10h 25mIcelandair

Fri 10/1021:25LHR - BWI

1 stop27h 00mIcelandair

Deal found 14/9£389

Sat 4/1020:30IAD - LHR

1 stop10h 25mIcelandair

Tue 14/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£364

Fri 10/1023:15IAD - LHR

1 stop31h 40mIcelandair

Wed 15/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£369

Fri 10/1023:15IAD - LHR

1 stop31h 40mIcelandair

Tue 21/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 13/9£370

Sun 12/1020:30IAD - LHR

1 stop10h 25mIcelandair

Thu 4/1212:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 13/9£368

Sun 26/1020:40IAD - LHR

1 stop10h 10mIcelandair

Thu 30/1020:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 14/9£367

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 16 September 2025.

Mon 13/1017:01BWI - LHR

2 stops36h 19mMultiple Airlines

Deal found 15/9£167

Tue 7/1005:35BWI - LHR

2 stops35h 25mMultiple Airlines

Deal found 15/9£173

Fri 10/1017:01BWI - LHR

2 stops19h 44mMultiple Airlines

Deal found 15/9£176

Mon 20/1017:01BWI - LHR

2 stops36h 19mMultiple Airlines

Deal found 15/9£177

Sat 18/1005:35BWI - LHR

2 stops32h 15mMultiple Airlines

Deal found 14/9£177

Fri 17/1017:01BWI - LHR

2 stops19h 44mMultiple Airlines

Deal found 14/9£180

Sat 11/1005:35BWI - LHR

2 stops31h 10mMultiple Airlines

Deal found 13/9£183

Sun 12/1012:20BWI - LHR

2 stops28h 40mMultiple Airlines

Deal found 15/9£185

Wed 1/1011:02BWI - LHR

3 stops30h 53mMultiple Airlines

Deal found 15/9£186

Sun 19/1006:00BWI - LHR

3 stops31h 50mMultiple Airlines

Deal found 14/9£188

Thu 27/1117:30IAD - LHR

1 stop12h 55mTAP AIR PORTUGAL

Deal found 15/9£196

Sat 15/1105:58IAD - LHR

3 stops28h 32mMultiple Airlines

Deal found 15/9£197

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

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 5/11

19:40-10:50

1 stop10h 10m

London Heathrow

Wed 12/11

12:15-18:30

1 stop11h 15m

£384

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 7/12

19:40-10:50

1 stop10h 10m

London Heathrow

Thu 8/1

20:35-18:30

1 stop26h 55m

£386

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 8/2

12:30-09:20

2 stops15h 50m

London Heathrow

Wed 11/3

06:40-18:15

1 stop15h 35m

£393

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 24/1

12:30-09:20

2 stops15h 50m

London Heathrow

Sun 1/2

21:05-17:15

2 stops25h 10m

£398

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 14/10

12:09-09:35

2 stops16h 26m

London Heathrow

Tue 21/10

06:40-19:59

1 stop18h 19m

£407

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 29/9

20:30-20:20

1 stop18h 50m

London Heathrow

Sun 5/10

21:25-19:20

1 stop26h 55m

£408

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 6/2

12:55-07:10

2 stops13h 15m

London Heathrow

Sun 8/2

06:50-14:35

1 stop12h 45m

£417

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Fri 24/10

20:30-11:55

1 stop10h 25m

London Heathrow

Thu 6/11

20:35-18:40

1 stop27h 05m

£418

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Thu 2/10

20:30-11:55

1 stop10h 25m

London Heathrow

Sun 5/10

21:25-19:25

1 stop27h 00m

£418

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 26/11

18:20-06:40

Nonstop7h 20m

London Heathrow

Mon 8/12

13:45-16:40

1 stop31h 55m

£419

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 60 results

...

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.

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

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

Booking 63 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.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £112). Flying from Washington, D.C. to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

It’s typically best to fly out from Washington, D.C. to London Heathrow Airport at midday. Doing so could potentially save you 3% on the flight price compared to flying in the morning, which is usually more expensive.

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

The most flights from WAS to LHR are scheduled on a Monday (28 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (20 on average).

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

Reykjavik (KEF) – 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?

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £397.

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

Flights via Philadelphia (PHL) have the shortest average one-way travel time for one-stop routes: 8h 50m.

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

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average stopover time of 1h 44m.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Virgin Atlantic, Icelandair, andIberia 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.

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Virgin Atlantic

7.4

Good

664 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Icelandair

7.0

Good

544 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Iberia

7.0

Good

2,924 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,361 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?
Icelandair, Scandinavian Airlines, and United Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 10h 10m. Your travel time can differ by up to 5h 40m. 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 £305, Lufthansa will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £363 and £377, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 45% 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 £217 on JetBlue. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £258 and Icelandair from £263 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 Aeromexico (100%), KLM (80%) or Air France (80%) 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 £631, our data shows the cheapest flight currently is £310. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £312 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, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £112). Flying from Washington, D.C. to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

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Top 9 airlines flying from Washington, D.C. to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£305	Average£517	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Icelandair	Cheapest£353	Average£531	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£377	Average£602	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£381	Average£568	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air France	Cheapest£392	Average£520	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Iberia	Cheapest£410	Average£523	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
KLM	Cheapest£454	Average£608	FlexibilityNo cancel fee	On-time75%	Search KLM flights
American Airlines	Cheapest£507	Average£710	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	Cheapest£518	Average£618	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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Cheap flights from Washington, D.C. to London Heathrow Airport from £167

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 13/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in August or September, booked 63 days in advance, depart on a Wednesday or Monday and return on a Wednesday

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

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Find 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 16 September 2025.

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 16 September 2025.

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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.

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

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

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Heathrow. Price data was last updated on 12 September 2025.

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 16 September 2025.

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

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.

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.

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.

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.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Virgin Atlantic, Icelandair, andIberia 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

Find useful and relevant information for your journey from Washington, D.C. 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. 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?

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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.

Top 9 airlines flying from Washington, D.C. to Heathrow

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

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

Can Cheapflights find flights from Washington, D.C. to Heathrow with no change fees?

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

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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 16 September 2025.