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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

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

Reykjavik (KEF) – chosen by Cheapflights users on 44% of 1-stop itineraries from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

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

About 17% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 131 minutes.

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

Historically, flights departing in the early afternoon 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 Thursday has historically faced a higher average of delays compared to other days of the week.

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

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

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

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $546.

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

One-way options have recently been found by users for as low as $453 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Icelandair from $479 and Aer Lingus from $481 one-way.

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

The most flights from LHR to IAD are scheduled on a Wednesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (18 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

When booking a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, you may want to consider flying on British Airways, Virgin Atlantic or United Airlines as they are the most popular for this route.

Most accurate provider : When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Gotogate the most. Gotogate has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Heathrow to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Heathrow to Dulles Intl?

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

Can I find deals for business class flights from Heathrow to Dulles Intl?

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

$573+ Flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Q: How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment. London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights typically cost between $715 and $1,219 in March. The cheapest round-trip price found within the last 3 days was $627 on Icelandair (Mar 17-Mar 20).

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Find cheap flights from Heathrow to Dulles Intl 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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3. Compare prices and book

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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 74 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

mar. 12/166:00 amLHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

lun. 1/195:30 pmIAD - LHR

1 stop23h 05mTAP AIR PORTUGAL

Deal found 12/11

$673

dom. 12/144:30 pmLHR - IAD

1 stop27h 45mTAP AIR PORTUGAL

dom. 1/1110:30 pmIAD - LHR

1 stop18h 05mTAP AIR PORTUGAL

Deal found 12/10

$726

jue. 12/255:50 pmLHR - IAD

1 stop27h 15mVirgin Atlantic

mié. 12/3110:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$733

vie. 12/198:15 amLHR - IAD

1 stop17h 45mTAP AIR PORTUGAL

lun. 1/265:30 pmIAD - LHR

1 stop14h 10mTAP AIR PORTUGAL

Deal found 12/11

$749

mié. 12/2411:30 amLHR - IAD

1 stop13h 00mVirgin Atlantic

mié. 12/3110:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$764

sáb. 12/136:00 pmLHR - IAD

1 stop26h 46mUnited Airlines

dom. 12/146:20 pmIAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 12/10

$773

lun. 12/156:30 pmLHR - IAD

1 stop25h 05mTAP AIR PORTUGAL

jue. 1/155:30 pmIAD - LHR

1 stop23h 05mTAP AIR PORTUGAL

Deal found 12/10

$774

lun. 12/294:50 pmLHR - IAD

Nonstop8h 40mVirgin Atlantic

mié. 1/1410:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$777

lun. 12/294:50 pmLHR - IAD

Nonstop8h 40mVirgin Atlantic

mié. 1/710:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$778

jue. 12/258:40 amLHR - IAD

1 stop12h 25mVirgin Atlantic

jue. 1/16:50 pmIAD - LHR

1 stop13h 55mVirgin Atlantic

Deal found 12/10

$781

mié. 12/249:00 amLHR - IAD

1 stop12h 35mVirgin Atlantic

jue. 1/16:50 pmIAD - LHR

1 stop13h 55mVirgin Atlantic

Deal found 12/10

$782

Best flights from Heathrow to Dulles Intl
Discover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 12, 2025.

jue. 1/1512:15 pmLHR - IAD

1 stop11h 15mIcelandair

dom. 2/17:40 pmIAD - LHR

1 stop10h 10mIcelandair

Deal found 12/11

$633

jue. 3/197:05 amLHR - IAD

2 stops15h 10mScandinavian Airlines

mié. 4/18:20 pmIAD - LHR

2 stops15h 05mScandinavian Airlines

Deal found 12/11

$650

jue. 2/58:25 amLHR - IAD

1 stop13h 05mBritish Airways

dom. 3/19:45 pmIAD - LHR

Nonstop7h 15mBritish Airways

Deal found 12/10

$678

jue. 3/197:05 amLHR - IAD

2 stops15h 10mScandinavian Airlines

lun. 3/308:20 pmIAD - LHR

2 stops15h 05mScandinavian Airlines

Deal found 12/10

$650

mar. 5/121:05 pmLHR - IAD

1 stop11h 15mIcelandair

mar. 5/198:30 pmIAD - LHR

1 stop18h 50mIcelandair

Deal found 12/11

$655

jue. 2/54:25 pmLHR - IAD

Nonstop8h 30mBritish Airways

jue. 2/266:20 pmIAD - LHR

Nonstop7h 10mBritish Airways

Deal found 12/11

$688

sáb. 3/1412:15 pmLHR - IAD

1 stop11h 15mIcelandair

dom. 3/158:40 pmIAD - LHR

1 stop10h 10mIcelandair

Deal found 12/11

$660

lun. 3/912:15 pmLHR - IAD

1 stop11h 15mIcelandair

dom. 3/158:40 pmIAD - LHR

1 stop10h 10mIcelandair

Deal found 12/11

$660

dom. 3/158:35 pmLHR - IAD

1 stop26h 55mIcelandair

vie. 3/208:40 pmIAD - LHR

1 stop10h 10mIcelandair

Deal found 12/11

$661

jue. 4/301:05 pmLHR - IAD

1 stop11h 15mIcelandair

mié. 5/68:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 12/10

$682

mar. 4/281:05 pmLHR - IAD

1 stop11h 15mIcelandair

sáb. 5/98:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 12/10

$682

mié. 4/291:05 pmLHR - IAD

1 stop11h 15mIcelandair

vie. 5/88:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 12/10

$682

Last-minute flights from Heathrow to Dulles Intl
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated diciembre 12, 2025 and is based on user searches.

mar. 12/166:00 amLHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

lun. 1/195:30 pmIAD - LHR

1 stop23h 05mTAP AIR PORTUGAL

Deal found 12/11

$673

mar. 12/166:00 amLHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

mié. 1/1410:30 pmIAD - LHR

1 stop15h 25mTAP AIR PORTUGAL

Deal found 12/11

$764

mié. 12/171:40 pmLHR - IAD

1 stop30h 35mTAP AIR PORTUGAL

dom. 1/1110:30 pmIAD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 12/10

$820

mié. 12/171:40 pmLHR - IAD

1 stop30h 35mTAP AIR PORTUGAL

mié. 1/710:30 pmIAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 12/10

$850

mié. 12/176:30 pmLHR - IAD

1 stop25h 45mTAP AIR PORTUGAL

jue. 1/85:30 pmIAD - LHR

1 stop19h 00mTAP AIR PORTUGAL

Deal found 12/10

$858

mié. 12/178:55 amLHR - IAD

1 stop12h 40mVirgin Atlantic

mié. 1/710:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$865

jue. 12/188:55 amLHR - IAD

1 stop12h 40mVirgin Atlantic

mar. 1/610:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10

$866

vie. 12/198:15 amLHR - IAD

1 stop17h 45mTAP AIR PORTUGAL

lun. 1/265:30 pmIAD - LHR

1 stop14h 10mTAP AIR PORTUGAL

Deal found 12/11

$749

vie. 12/1911:45 amLHR - IAD

1 stop17h 19mFinnair

vie. 1/911:34 amIAD - LHR

1 stop14h 46mFinnair

Deal found 12/11

$797

vie. 12/1911:45 amLHR - IAD

1 stop17h 19mAmerican Airlines

mar. 12/304:29 pmIAD - LHR

1 stop11h 46mAmerican Airlines

Deal found 12/11

$829

vie. 12/198:15 amLHR - IAD

1 stop17h 45mTAP AIR PORTUGAL

sáb. 1/105:30 pmIAD - LHR

1 stop23h 05mTAP AIR PORTUGAL

Deal found 12/10

$853

One-way flights from Heathrow to Dulles Intl
Search for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated diciembre 12, 2025.

vie. 2/138:50 amLHR - IAD

1 stop11h 45mAer Lingus

Deal found 12/10

$573

lun. 4/134:40 pmLHR - IAD

Nonstop8h 15mAustrian Airlines

Deal found 12/11

$574

lun. 2/1612:05 pmLHR - IAD

Nonstop8h 30mUnited Airlines

Deal found 12/10

$575

lun. 1/128:35 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 12/11

$577

dom. 1/119:55 amLHR - IAD

2 stops34h 20mMultiple Airlines

Deal found 12/10

$578

vie. 1/168:35 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 12/11

$579

vie. 3/276:00 amLHR - IAD

2 stops18h 30mMultiple Airlines

Deal found 12/9

$583

dom. 1/182:50 pmLHR - IAD

3 stops25h 53mMultiple Airlines

Deal found 12/11

$586

lun. 1/128:50 amLHR - IAD

1 stop11h 45mAer Lingus

Deal found 12/10

$589

mar. 1/2710:15 pmLHR - IAD

3 stops27h 45mMultiple Airlines

Deal found 12/10

$590

sáb. 1/246:00 amLHR - IAD

1 stop15h 40mSWISS

Deal found 12/10

$591

Find flight deals from Heathrow to Dulles Intl

Most accurate provider	Gotogate 3 stars
Most trusted provider	Gotogate 3 stars
Round-trip from	$627 (Cheapflightsfares)
One-way from	$573 (lastminute.com)
Popular in	July
Cheapest in	September
Average price	$850
Good round-trip deal	$676 or less
Good one-way deal	$705 or less

Provider with most accurate pricing for London Heathrow-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for London Heathrow-Washington, D.C. Dulles Intl flights.

Search Deals

From London Heathrow to Washington, D.C. Dulles Intl

Search Deals

One-way flight from London Heathrow to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($118 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from London Heathrow to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 1/15

12:15 pm-6:30 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

dom. 2/1

7:40 pm-10:50 am

1 stop10h 10m

$633

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 3/19

7:05 am-6:15 pm

2 stops15h 10m

Washington, D.C. Dulles Intl

mié. 4/1

8:20 pm-4:25 pm

2 stops15h 05m

$650

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 3/19

7:05 am-6:15 pm

2 stops15h 10m

Washington, D.C. Dulles Intl

lun. 3/30

8:20 pm-4:25 pm

2 stops15h 05m

$650

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 5/12

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

mar. 5/19

8:30 pm-8:20 pm

1 stop18h 50m

$655

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 3/14

12:15 pm-7:30 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

dom. 3/15

8:40 pm-10:50 am

1 stop10h 10m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 3/9

12:15 pm-7:30 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

dom. 3/15

8:40 pm-10:50 am

1 stop10h 10m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

dom. 3/15

8:35 pm-7:30 pm

1 stop26h 55m

Washington, D.C. Dulles Intl

vie. 3/20

8:40 pm-10:50 am

1 stop10h 10m

$661

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 2/5

8:25 am-4:30 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

dom. 3/1

9:45 pm-10:00 am

Nonstop7h 15m

$678

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 4/30

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

mié. 5/6

8:30 pm-11:55 am

1 stop10h 25m

$682

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 4/28

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

sáb. 5/9

8:30 pm-11:55 am

1 stop10h 25m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 22 results

Compare providers for flights from Heathrow to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Dulles Intl in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Gotogate	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*1 star
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Gotogate the most. Gotogate has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Heathrow 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Prices

Airlines

Delays

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

The best time to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 74 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $507). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $710). 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 LHR to IAD?

When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 12% versus a flight at noon.

How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

The best insider tips for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. Dulles Intl Airport trip

Airlines

British Airways

BA's Club Suite offers private pods with a door, ensuring a more exclusive experience.

World Traveller Plus provides extra seat width and legroom, ideal for long-haul comfort.

United Airlines

Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens for comfort.

United's Premium Plus seats provide extra legroom, upgraded meals, and two checked bags on international flights.

Airports

LHR

Expect long security lines at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

IAD

Use the Silver Line Metro to reach downtown D.C. from IAD in under 40 minutes, a cost-effective transportation option.

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on LHR and IAD

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Delta

7.9

Good

8,005 reviews

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Virgin Atlantic

7.5

Good

675 reviews

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,095 reviews

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Lufthansa

6.8

Okay

7,626 reviews

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

British Airways

6.7

Okay

7,571 reviews

Delta

7.9

Good

8,005 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

How long is the flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
A quick flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport can take about 11h 15m. Icelandair provides one of the quickest options available for as low as $633. The distance from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is about 3664 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Scandinavian Airlines, at $271, was found to be the cheapest airline from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Delta and Austrian Airlines. These flights start at 64% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as $453 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Icelandair from $479 and Aer Lingus from $481 one-way.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport consider choosing KLM (94%), Air France (93%) or Delta (93%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $1,492 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $572 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at $548.
Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Heathrow to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Heathrow to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dulles Intl.
Can I find deals for business class flights from Heathrow to Dulles Intl?
Yes. Cheapflights offers flight deals from Heathrow to Dulles Intl 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $507). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $710). 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 10 airlines flying from Heathrow to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$320	Average$926	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$984	FlexibilityNo cancel fee	On-time78%
TAP AIR PORTUGAL	Cheapest$473	Average$730	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$510	Average$720	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$559	Average$711	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$567	Average$813	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$593	Average$784	FlexibilityNo cancel fee	On-time70%
Air Canada	Cheapest$635	Average$663	FlexibilityNo cancel fee	On-time67%
Lufthansa	Cheapest$649	Average$862	FlexibilityNo cancel fee	On-time76%

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$573+ Cheap flights from Heathrow (LHR) to Dulles Intl (IAD)

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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 74 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles IntlExplore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

Find flight deals from Heathrow to Dulles Intl

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

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Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Dulles Intl in December.

Best time to book a flight from Heathrow to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Heathrow with our price prediction graph.

Cheapflights Insights

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

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

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

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

How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

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

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

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

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

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

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

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

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

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

The best insider tips for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. Dulles Intl Airport trip

Airlines

British Airways

United Airlines

Airports

LHR

IAD

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Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares 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 Heathrow to Dulles Intl. 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

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

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

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

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

Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?

How can I find direct flights from Heathrow to Dulles Intl?

Can I find deals for business class flights from Heathrow to Dulles Intl?

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Heathrow to Dulles Intl

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Top 10 airlines flying from Heathrow to Dulles Intl

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Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.