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

Airlines like Virgin Atlantic, Delta, and KLM fly from London to Washington, D.C. Dulles Intl Airport in about 10h 35m. The time it takes to get you to your destination can typically vary by up to 16h 10m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3684 mi. This flight may include one or multiple stops.

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

Lufthansa, at $556, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include American Airlines and British Airways. Lufthansa is 22% cheaper than the average price of flights available within the next 90 days to this destination.

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

One-way options have recently been found by users for as low as $334 on Virgin Atlantic. Other airlines that offer cheap prices include Icelandair from $407 and Aer Lingus from $412 one-way.

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 routes from London to Washington, D.C. Dulles Intl Airport?

While some choose either London Gatwick - Washington, D.C. Dulles Intl or London Stansted - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C. Dulles Intl Airport.

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

Looking at all options, your cheapest flight can be booked for $472. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $421 on average, our data indicates $1,970 when flying from London to Washington, D.C. Dulles Intl Airport.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. Dulles Intl Airport on time: Air Canada (86%), Austrian Airlines (86%), Copa Airlines (86%).

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

The most popular airlines flying from London to Washington, D.C. Dulles Intl Airport are British Airways, Lufthansa and United Airlines. Something to consider prior to booking your flight.

Most accurate provider : When it comes to deals on London-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-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-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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-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 London to Dulles Intl that include hotel bookings?

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

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

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

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

Yes. Cheapflights offers flight deals from London 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.

$479+ Cheap Flights from London to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 84 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from London to Dulles Intl

Cheapest

Best

Last-minute

One-way

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Wed 10/218:15 pm -

1 stop24h 20m

Sun 10/256:45 pm -

1 stop9h 25m

Deal found 8/31

$592

Wed 9/3010:00 am -

2 stops18h 14m

Wed 10/710:57 am -

2 stops16h 53m

Deal found 8/31

$601

Tue 12/151:20 pm -

Nonstop8h 40m

Wed 12/306:55 pm -

Nonstop7h 25m

Deal found 8/27

$602

Sun 12/204:45 pm -

1 stop28h 45m

Sun 1/106:40 pm -

1 stop16h 05m

Deal found 8/27

$602

Wed 10/78:15 pm -

1 stop24h 20m

Sat 1/236:30 pm -

2 stops13h 45m

Deal found 8/31

$602

Sat 9/123:50 pm -

Nonstop8h 25m

Fri 4/25:40 pm -

1 stop15h 10m

Deal found 8/30

$603

Sat 10/1010:25 am -

1 stop14h 10m

Tue 12/112:35 pm -

2 stops22h 10m

Deal found 8/29

$603

Mon 10/128:25 am -

1 stop12h 10m

Mon 1/116:15 pm -

1 stop10h 15m

Deal found 8/30

$603

Thu 9/243:40 pm -

1 stop32h 40m

Sat 10/38:30 pm -

1 stop13h 05m

Deal found 8/31

$604

Tue 10/139:20 am -

1 stop11h 15m

Thu 12/35:45 pm -

1 stop9h 25m

Deal found 8/29

$604

Wed 11/1810:15 am -

2 stops15h 39m

Fri 11/206:57 pm -

1 stop30h 53m

Deal found 8/27

$605

Wed 10/213:05 pm -

3 stops30h 55m

Wed 11/48:30 pm -

2 stops14h 50m

Deal found 8/26

$605

Best flights from London to Dulles Intl
Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Wed 11/47:45 am -

1 stop13h 10m

Sat 11/146:15 pm -

1 stop19h 10m

Deal found 8/30

$602

Sat 9/129:40 am -

2 stops20h 01m

Tue 3/306:30 pm -

2 stops14h 15m

Deal found 8/28

$604

Tue 10/139:20 am -

1 stop11h 15m

Thu 12/35:45 pm -

1 stop9h 25m

Deal found 8/29

$604

Sat 10/108:30 am -

1 stop11h 40m

Sat 10/174:02 pm -

1 stop11h 28m

Deal found 8/26

$613

Sat 9/126:50 am -

1 stop12h 30m

Sat 10/36:35 pm -

Nonstop7h 20m

Deal found 8/26

$624

Wed 10/143:40 pm -

1 stop32h 40m

Sun 12/67:40 pm -

1 stop10h 15m

Deal found 8/29

$627

Tue 11/244:35 pm -

1 stop33h 00m

Sun 11/2910:30 pm -

1 stop12h 15m

Deal found 8/30

$637

Tue 10/139:05 am -

1 stop33h 55m

Tue 10/203:47 pm -

1 stop12h 13m

Deal found 8/27

$677

Wed 10/79:05 pm -

2 stops24h 55m

Mon 10/128:20 pm -

1 stop17h 10m

Deal found 8/31

$735

Wed 10/75:45 pm -

1 stop22h 45m

Mon 10/129:40 pm -

1 stop31h 15m

Deal found 8/29

$930

Thu 10/1510:00 am -

1 stop10h 35m

Sat 1/166:15 pm -

1 stop20h 20m

Deal found 8/31

$602

Thu 10/2210:00 am -

1 stop10h 35m

Mon 10/267:15 pm -

1 stop9h 35m

Deal found 8/26

$607

Sun 10/117:50 pm -

1 stop24h 20m

Sun 10/1810:35 pm -

1 stop18h 25m

Deal found 8/27

$641

Wed 12/1611:55 am -

1 stop11h 35m

Mon 1/47:40 pm -

1 stop10h 15m

Deal found 8/26

$654

Wed 10/218:25 am -

2 stops18h 50m

Wed 11/47:40 pm -

2 stops21h 40m

Deal found 8/26

$661

Mon 11/29:20 am -

1 stop11h 35m

Mon 11/912:35 pm -

2 stops15h 55m

Deal found 8/29

$604

Wed 10/148:40 am -

1 stop13h 05m

Tue 12/16:20 pm -

Nonstop7h 20m

Deal found 8/29

$672

Tue 10/610:35 am -

1 stop15h 00m

Thu 10/225:45 pm -

2 stops21h 40m

Deal found 8/30

$649

Wed 12/1610:00 am -

2 stops18h 23m

Thu 1/76:40 pm -

1 stop16h 05m

Deal found 8/26

$650

Tue 10/68:00 am -

1 stop15h 50m

Thu 10/228:30 pm -

1 stop12h 35m

Deal found 8/30

$663

Mon 10/128:25 am -

1 stop12h 10m

Mon 10/1912:30 pm -

2 stops16h 00m

Deal found 8/28

$605

Mon 10/128:40 am -

1 stop13h 05m

Mon 12/710:15 pm -

Nonstop7h 35m

Deal found 8/29

$672

Tue 10/204:25 pm -

1 stop27h 45m

Sun 10/2511:30 pm -

2 stops17h 05m

Deal found 8/28

$655

Tue 10/138:25 am -

1 stop12h 10m

Mon 10/1912:30 pm -

2 stops16h 00m

Deal found 8/27

$606

Wed 11/1812:05 pm -

1 stop33h 55m

Wed 12/166:00 am -

2 stops20h 10m

Deal found 8/30

$674

Mon 9/216:30 am -

1 stop14h 15m

Tue 9/299:05 pm -

1 stop10h 40m

Deal found 8/26

$675

Sun 12/2010:00 am -

1 stop11h 30m

Wed 1/66:30 pm -

2 stops33h 30m

Deal found 8/26

$707

Wed 10/215:50 pm -

1 stop26h 45m

Wed 11/46:15 pm -

1 stop9h 35m

Deal found 8/26

$607

Mon 12/219:35 pm -

2 stops22h 10m

Wed 1/2010:30 pm -

1 stop11h 35m

Deal found 8/28

$673

Tue 9/295:35 pm -

1 stop22h 55m

Wed 10/71:15 pm -

1 stop22h 25m

Deal found 8/29

$930

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

Sat 9/511:30 am -

2 stops16h 56m

Fri 9/1112:25 pm -

1 stop12h 55m

Deal found 8/29

$605

Sat 9/510:00 am -

1 stop10h 35m

Mon 9/216:10 pm -

1 stop17h 30m

Deal found 8/28

$606

Fri 9/118:40 am -

1 stop11h 55m

Wed 3/2412:30 pm -

2 stops15h 20m

Deal found 8/28

$606

Sat 9/123:50 pm -

Nonstop8h 25m

Fri 4/27:00 am -

2 stops18h 20m

Deal found 8/30

$602

Sat 9/129:40 am -

2 stops20h 01m

Tue 3/306:30 pm -

2 stops14h 15m

Deal found 8/28

$604

Thu 9/1710:00 am -

1 stop10h 35m

Tue 9/2910:15 am -

2 stops16h 40m

Deal found 8/31

$602

Tue 9/228:25 am -

2 stops19h 49m

Wed 10/2812:27 pm -

2 stops16h 23m

Deal found 8/31

$592

Thu 9/243:40 pm -

1 stop32h 40m

Sat 10/38:30 pm -

1 stop13h 05m

Deal found 8/31

$604

Fri 9/258:25 am -

1 stop12h 10m

Fri 10/25:30 pm -

1 stop9h 25m

Deal found 8/28

$605

Mon 9/285:50 pm -

1 stop26h 45m

Mon 10/55:15 pm -

2 stops19h 05m

Deal found 8/31

$600

Tue 9/298:25 am -

1 stop12h 10m

Tue 10/1310:57 am -

2 stops15h 58m

Deal found 8/29

$604

Wed 9/3010:00 am -

2 stops18h 14m

Wed 10/710:57 am -

2 stops16h 53m

Deal found 8/31

$596

One-way flights from London to Dulles Intl
Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Fri 1/224:30 pm -

3 stops27h 45m

Deal found 8/27

$479

Sat 10/317:30 am -

1 stop13h 50m

Deal found 8/30

$479

Sat 10/3110:30 pm -

3 stops46h 50m

Deal found 8/31

$479

Sun 1/105:15 pm -

2 stops27h 00m

Deal found 8/27

$479

Tue 9/228:35 pm -

3 stops29h 00m

Deal found 8/30

$479

Wed 10/218:35 pm -

3 stops27h 20m

Deal found 8/28

$480

Wed 10/212:00 pm -

Nonstop8h 25m

Deal found 8/29

$480

Wed 9/236:00 am -

2 stops38h 10m

Deal found 8/30

$480

Sun 9/208:05 pm -

3 stops48h 05m

Deal found 8/27

$480

Mon 9/148:50 pm -

2 stops47h 20m

Deal found 8/30

$480

Tue 11/39:45 pm -

3 stops26h 35m

Deal found 8/31

$481

Wed 10/286:15 am -

1 stop15h 05m

Deal found 8/30

$481

Find flight deals from London to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$590 (Virgin Atlantic)
One-way from	$479 (Kiwi.com)
Popular in	May
Cheapest in	September
Average price	$747
Good round-trip deal	$645 or less
Good one-way deal	$564 or less

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

Search Deals

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

Search Deals

From London (LON) to Washington, D.C. Dulles Intl

Search Deals

One-way flight from London (LON) to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($44 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Wed 11/4

7:45 am-3:55 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Sat 11/14

6:15 pm-6:25 pm

1 stop19h 10m

$602

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Thu 10/15

10:00 am-3:35 pm

1 stop10h 35m

Washington, D.C. Dulles Intl

Sat 1/16

6:15 pm-7:35 pm

1 stop20h 20m

$602

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Sat 9/12

9:40 am-12:41 am

2 stops20h 01m

Washington, D.C. Dulles Intl

Tue 3/30

6:30 pm-1:45 pm

2 stops14h 15m

$604

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Tue 10/13

9:20 am-3:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 12/3

5:45 pm-8:10 am

1 stop9h 25m

$604

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Mon 11/2

9:20 am-3:55 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 11/9

12:35 pm-9:30 am

2 stops15h 55m

$604

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Mon 10/12

8:25 am-3:35 pm

1 stop12h 10m

Washington, D.C. Dulles Intl

Mon 10/19

12:30 pm-9:30 am

2 stops16h 00m

$605

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Tue 10/13

8:25 am-3:35 pm

1 stop12h 10m

Washington, D.C. Dulles Intl

Mon 10/19

12:30 pm-9:30 am

2 stops16h 00m

$606

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Thu 10/22

10:00 am-3:35 pm

1 stop10h 35m

Washington, D.C. Dulles Intl

Mon 10/26

7:15 pm-8:50 am

1 stop9h 35m

$607

LondonWashington, D.C.

LCY London City - IAD Washington, D.C. Dulles Intl

LCYIAD

London City

Wed 10/21

5:50 pm-3:35 pm

1 stop26h 45m

Washington, D.C. Dulles Intl

Wed 11/4

6:15 pm-8:50 am

1 stop9h 35m

$607

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Sat 10/10

8:30 am-3:10 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Sat 10/17

4:02 pm-8:30 am

1 stop11h 28m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/27

Showing 1-10 of 60 resultsSorted by cheapest first

...

Compare providers for flights from London to Dulles Intl

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

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
business-class.com	Price Accuracy3 stars	Trust Score*1 star

*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-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-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-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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-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 London to Dulles Intl

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

LON-IAD

LTN-IAD

LHR-IAD

LGW-IAD

SEN-IAD

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 to Washington, D.C. Dulles Intl Airport

LON-IAD

LTN-IAD

LHR-IAD

LGW-IAD

SEN-IAD

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

Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $649). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $777). 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 LON to IAD?

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

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

The most flights from LON to IAD are scheduled on a Sunday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (21 on average).

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

Airfare is typical for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $545 and $745 in October.
The cheapest round-trip price found within the last 5 days was $590 on Virgin Atlantic (Oct 31-Jan 9).

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

Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

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

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $587.

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

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 11h 15m.

Which airport typically offers the quickest layover for flights from London 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 25m.

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

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 141 minutes.

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

Historically, flights departing in the evening 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, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

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

The price you pay for your flight from London to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

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

Our travel experts

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Ramsey Qubein

Expert on LHR and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

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

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

United Airlines

7.4

Good

10,146 reviews

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Virgin Atlantic

7.4

Good

695 reviews

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Icelandair

6.9

Okay

738 reviews

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Lufthansa

6.8

Okay

8,227 reviews

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

British Airways

6.7

Okay

8,198 reviews

United Airlines

7.4

Good

10,146 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

How long is the flight from London to Washington, D.C. Dulles Intl Airport?
Airlines like Virgin Atlantic, Delta, and KLM fly from London to Washington, D.C. Dulles Intl Airport in about 10h 35m. The time it takes to get you to your destination can typically vary by up to 16h 10m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3684 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?
Lufthansa, at $556, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include American Airlines and British Airways. Lufthansa is 22% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as $334 on Virgin Atlantic. Other airlines that offer cheap prices include Icelandair from $407 and Aer Lingus from $412 one-way.
What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?
While some choose either London Gatwick - Washington, D.C. Dulles Intl or London Stansted - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C. Dulles Intl Airport.
What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. Dulles Intl Airport on time: Air Canada (86%), Austrian Airlines (86%), Copa Airlines (86%).
What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?
Looking at all options, your cheapest flight can be booked for $472. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $421 on average, our data indicates $1,970 when flying from London to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from London to Dulles Intl that include hotel bookings?
Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.
Can I find deals for business class flights from London to Dulles Intl?
Yes. Cheapflights offers flight deals from London 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 to Washington, D.C. Dulles Intl Airport?
Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $649). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $777). 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 8 airlines flying from London to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest$556	Average$739	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$559	Average$769	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$566	Average$688	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$567	Average$791	FlexibilityNo cancel fee	On-time69%
Austrian Airlines	Cheapest$567	Average$743	FlexibilityNo cancel fee	On-time78%
Delta	Cheapest$591	Average$872	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$640	Average$776	FlexibilityNo cancel fee	On-time72%
Aer Lingus	Cheapest$658	Average$786	FlexibilityNo cancel fee	On-timeN/A

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$479+ Cheap flights from London (LON) 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from London to Dulles Intl

Cheapest flights from London to Dulles IntlExplore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Best flights from London to Dulles IntlDiscover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Last-minute flights from London to Dulles IntlDiscover last-minute flight deals from London to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

Discover last-minute flight deals from London to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

One-way flights from London to Dulles IntlSearch for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

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

Compare providers for flights from London to Dulles Intl

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 London to Dulles Intl in August.

Best time to book a flight from London to Dulles Intl

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

Cheapflights Insights

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

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

Find hourly flight availability from London to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 31, 2026.

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

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

Explore weekly flight availability from London to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 31, 2026.

The most flights from LON to IAD are scheduled on a Sunday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (21 on average).

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

Airfare is typical for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $545 and $745 in October.The cheapest round-trip price found within the last 5 days was $590 on Virgin Atlantic (Oct 31-Jan 9).

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

Share of 1-stop round-trip flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

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

Average round-trip fare for 1-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $587.

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

Shortest average travel time for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 11h 15m.

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

Average layover duration for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 25m.

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

About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 141 minutes.

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

Historically, flights departing in the evening 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, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

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

The price you pay for your flight from London to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

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

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Related info for your journey

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

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

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

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

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

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

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

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

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

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Best flights from London to Dulles Intl
Discover carefully curated flight deals from London to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

One-way flights from London to Dulles Intl
Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $545 and $745 in October.
The cheapest round-trip price found within the last 5 days was $590 on Virgin Atlantic (Oct 31-Jan 9).