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

Airlines like Delta, KLM, and United Airlines fly from London to Washington, D.C. Dulles Intl Airport in about 8h 35m. The time it takes to get you to your destination can typically vary by up to 4h 30m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3664 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 United Airlines and British Airways. Lufthansa is 23% 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 Stansted - Washington, D.C. Dulles Intl or London Gatwick - 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 $465. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $433 on average, our data indicates $2,051 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 (78%), Austrian Airlines (78%), Copa Airlines (78%).

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 Virgin Atlantic. 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.

$484+ 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 March or September, booked 84 days in advance, depart on a Wednesday or Thursday 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 September 26, 2026.

Sat 10/36:50 am -

1 stop11h 40m

Tue 10/64:00 pm -

1 stop9h 35m

Deal found 9/26

$549

Thu 10/229:25 am -

1 stop12h 20m

Thu 10/299:10 pm -

1 stop16h 40m

Deal found 9/24

$549

Sat 10/33:50 pm -

Nonstop8h 25m

Sun 10/1110:05 pm -

Nonstop7h 35m

Deal found 9/25

$550

Sat 10/319:05 am -

1 stop12h 55m

Fri 11/138:10 pm -

1 stop30h 40m

Deal found 9/25

$550

Wed 10/78:40 am -

2 stops32h 10m

Mon 10/1212:30 pm -

1 stop15h 20m

Deal found 9/26

$551

Tue 11/248:40 am -

1 stop13h 20m

Tue 12/18:10 pm -

1 stop30h 30m

Deal found 9/24

$551

Wed 10/2810:00 am -

1 stop10h 55m

Mon 11/236:15 pm -

1 stop9h 35m

Deal found 9/25

$551

Mon 11/96:30 am -

1 stop14h 25m

Mon 11/166:20 pm -

1 stop10h 05m

Deal found 9/25

$552

Mon 12/2111:55 am -

1 stop11h 35m

Mon 12/287:40 pm -

1 stop10h 15m

Deal found 9/26

$552

Wed 12/2311:05 am -

1 stop32h 25m

Mon 12/2810:15 pm -

Nonstop7h 35m

Deal found 9/25

$553

Sat 10/310:25 am -

1 stop14h 10m

Sat 10/106:15 pm -

1 stop10h 05m

Deal found 9/24

$553

Sat 10/38:25 am -

1 stop12h 10m

Tue 10/65:30 pm -

1 stop9h 25m

Deal found 9/25

$553

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 September 26, 2026.

Wed 10/1411:30 am -

1 stop13h 05m

Sat 10/176:31 pm -

1 stop20h 39m

Deal found 9/23

$569

Thu 10/154:40 pm -

Nonstop8h 40m

Fri 10/2310:05 pm -

Nonstop7h 35m

Deal found 9/25

$570

Fri 10/302:00 pm -

Nonstop8h 40m

Tue 11/106:55 pm -

Nonstop7h 25m

Deal found 9/26

$570

Wed 12/212:05 pm -

Nonstop8h 35m

Sun 12/66:20 pm -

Nonstop7h 20m

Deal found 9/23

$572

Wed 10/75:00 pm -

2 stops23h 50m

Tue 10/139:45 pm -

1 stop13h 15m

Deal found 9/24

$580

Wed 12/27:15 pm -

1 stop26h 05m

Sun 12/68:50 pm -

1 stop18h 45m

Deal found 9/22

$647

Sat 12/198:35 pm -

1 stop26h 55m

Wed 12/307:40 pm -

1 stop10h 10m

Deal found 9/26

$670

Tue 3/169:20 pm -

2 stops28h 10m

Mon 3/2910:35 pm -

2 stops16h 50m

Deal found 9/22

$678

Mon 12/217:05 pm -

1 stop25h 25m

Mon 12/285:25 pm -

1 stop14h 25m

Deal found 9/26

$934

Tue 11/105:20 pm -

1 stop31h 05m

Tue 11/179:20 pm -

1 stop38h 00m

Deal found 9/26

$978

Fri 10/307:40 am -

1 stop13h 40m

Tue 11/35:15 pm -

2 stops15h 45m

Deal found 9/21

$979

Wed 10/74:40 pm -

Nonstop8h 40m

Mon 10/267:20 pm -

Nonstop7h 20m

Deal found 9/24

$572

Wed 10/1410:25 am -

1 stop14h 10m

Tue 11/36:40 pm -

1 stop16h 05m

Deal found 9/26

$573

Fri 10/304:20 pm -

Nonstop8h 55m

Tue 11/310:15 pm -

Nonstop7h 35m

Deal found 9/21

$577

Thu 10/2210:25 am -

2 stops17h 51m

Mon 11/29:30 pm -

1 stop13h 15m

Deal found 9/22

$584

Mon 11/210:00 am -

1 stop10h 55m

Thu 11/125:45 pm -

1 stop9h 25m

Deal found 9/23

$596

Wed 10/1412:15 pm -

Nonstop8h 15m

Sun 10/2511:15 pm -

Nonstop7h 35m

Deal found 9/21

$577

Thu 10/2210:25 am -

1 stop14h 10m

Mon 11/29:30 pm -

1 stop13h 15m

Deal found 9/22

$579

Fri 11/207:45 am -

2 stops14h 43m

Thu 11/265:45 pm -

1 stop20h 50m

Deal found 9/22

$602

Fri 10/306:45 am -

2 stops16h 45m

Tue 11/37:40 pm -

2 stops13h 25m

Deal found 9/21

$605

Sun 11/298:35 pm -

1 stop26h 55m

Wed 12/97:40 pm -

1 stop10h 10m

Deal found 9/23

$671

Fri 3/194:25 pm -

Nonstop8h 30m

Fri 4/910:25 pm -

Nonstop7h 25m

Deal found 9/25

$676

Wed 12/210:40 am -

1 stop14h 50m

Sun 12/610:30 pm -

2 stops41h 05m

Deal found 9/21

$689

Fri 3/1910:00 am -

1 stop10h 55m

Sun 4/115:40 pm -

1 stop10h 10m

Deal found 9/25

$634

Thu 10/88:25 am -

1 stop12h 10m

Sun 10/185:30 pm -

1 stop9h 25m

Deal found 9/21

$598

Tue 11/247:45 am -

1 stop13h 00m

Tue 12/15:15 pm -

1 stop12h 20m

Deal found 9/24

$611

Fri 10/238:40 am -

1 stop13h 05m

Thu 10/291:15 pm -

1 stop12h 40m

Deal found 9/22

$621

Thu 12/1711:55 am -

1 stop11h 35m

Sun 12/277:40 pm -

1 stop10h 15m

Deal found 9/24

$691

Thu 10/89:20 pm -

2 stops22h 05m

Wed 10/2811:30 pm -

2 stops30h 30m

Deal found 9/22

$724

Sun 10/259:30 am -

1 stop11h 25m

Sat 1/238:15 am -

2 stops17h 55m

Deal found 9/25

$650

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated September 26, 2026 and is based on user searches.

Thu 10/16:30 am -

1 stop14h 05m

Wed 10/1410:05 pm -

Nonstop7h 35m

Deal found 9/24

$554

Fri 10/24:00 pm -

Nonstop8h 25m

Thu 10/1510:05 pm -

Nonstop7h 35m

Deal found 9/25

$553

Fri 10/26:00 am -

1 stop14h 25m

Mon 10/56:35 pm -

Nonstop7h 20m

Deal found 9/26

$556

Sat 10/36:50 am -

1 stop11h 40m

Tue 10/64:00 pm -

1 stop9h 35m

Deal found 9/26

$549

Sat 10/33:50 pm -

Nonstop8h 25m

Sun 10/1110:05 pm -

Nonstop7h 35m

Deal found 9/25

$550

Sat 10/36:50 am -

2 stops19h 21m

Thu 10/85:45 pm -

1 stop33h 35m

Deal found 9/25

$552

Sat 10/310:25 am -

1 stop14h 10m

Sat 10/106:15 pm -

1 stop10h 05m

Deal found 9/24

$553

Sat 10/38:25 am -

1 stop12h 10m

Tue 10/65:30 pm -

1 stop9h 25m

Deal found 9/25

$553

Thu 10/229:25 am -

1 stop12h 20m

Thu 10/299:10 pm -

1 stop16h 40m

Deal found 9/24

$549

Wed 10/2810:00 am -

1 stop10h 55m

Mon 11/236:15 pm -

1 stop9h 35m

Deal found 9/25

$551

Wed 10/2811:55 am -

1 stop11h 35m

Sat 10/318:40 pm -

1 stop10h 15m

Deal found 9/25

$555

Sat 10/319:05 am -

1 stop12h 55m

Fri 11/138:10 pm -

1 stop30h 40m

Deal found 9/25

$550

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 September 26, 2026.

Mon 11/168:35 pm -

1 stop26h 55m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$484

Mon 1/119:30 pm -

1 stop23h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$484

Fri 10/912:40 pm -

1 stop27h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/22

$484

Wed 11/115:20 pm -

3 stops26h 55m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/22

$484

Thu 12/316:20 am -

3 stops37h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$484

Sat 12/124:15 pm -

3 stops33h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/22

$485

Thu 11/267:30 am -

2 stops36h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/25

$485

Sun 11/224:25 pm -

Nonstop8h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/25

$486

Tue 10/65:40 am -

3 stops39h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$486

Tue 10/208:05 am -

3 stops36h 40m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/22

$486

Mon 11/99:55 am -

2 stops33h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$487

Mon 1/49:30 pm -

3 stops46h 15m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$487

Find flight deals from London to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$549 (United Airlines)
One-way from	$482 (Kiwi.com)
Popular in	April
Cheapest in	March
Average price	$662
Good round-trip deal	$582 or less
Good one-way deal	$545 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. 0% potential increase in price ($5 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 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.

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

LHRIAD

London Heathrow

Mon 11/23

4:25 pm-7:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$486

Quickest round-trip

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Tue 3/2

12:15 pm-3:40 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$486

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Sat 1/23

5:00 pm-8:35 pm

3 stops32h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$489

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Tue 10/6

7:00 am-3:45 pm

3 stops37h 45m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$495

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Sun 3/21

4:25 pm-8:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$500

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Sun 1/31

5:15 pm-4:20 pm

2 stops28h 05m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$503

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Wed 10/7

3:40 pm-3:45 pm

3 stops53h 05m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$504

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Tue 1/12

12:15 pm-3:40 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$505

LondonWashington, D.C.

SEN London Southend - IAD Washington, D.C. Dulles Intl

SENIAD

London Southend

Mon 10/5

4:00 pm-3:45 pm

3 stops52h 45m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$507

LondonWashington, D.C.

LTN London Luton - IAD Washington, D.C. Dulles Intl

LTNIAD

London Luton

Sun 1/31

9:30 pm-4:20 pm

1 stop23h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$519

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/26

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 September.

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

LHR-IAD

LGW-IAD

LCY-IAD

STN-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

LHR-IAD

LGW-IAD

LCY-IAD

STN-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 $658). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $776). 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 Friday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 on average).

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

Airfare is below average for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $608 and $786 in October.
The cheapest round-trip price found within the last 5 days was $549 on United Airlines (Oct 13-Oct 23).

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

About 15% 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

10,243 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

10,243 reviews

United Airlines

7.4

Good

10,243 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

694 reviews

United Airlines

7.4

Good

10,243 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

753 reviews

United Airlines

7.4

Good

10,243 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

8,237 reviews

United Airlines

7.4

Good

10,243 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

8,237 reviews

United Airlines

7.4

Good

10,243 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 Delta, KLM, and United Airlines fly from London to Washington, D.C. Dulles Intl Airport in about 8h 35m. The time it takes to get you to your destination can typically vary by up to 4h 30m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3664 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 United Airlines and British Airways. Lufthansa is 23% 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 Stansted - Washington, D.C. Dulles Intl or London Gatwick - 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 (78%), Austrian Airlines (78%), Copa Airlines (78%).
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 $465. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $433 on average, our data indicates $2,051 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 $658). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $776). 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 London to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest$556	Average$740	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$563	Average$818	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$566	Average$690	FlexibilityNo cancel fee	On-time70%
Austrian Airlines	Cheapest$567	Average$743	FlexibilityNo cancel fee	On-time78%
American Airlines	Cheapest$568	Average$776	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$581	Average$757	FlexibilityNo cancel fee	On-time72%
Delta	Cheapest$581	Average$872	FlexibilityNo cancel fee	On-timeN/A
Air France	Cheapest$582	Average$730	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$658	Average$783	FlexibilityNo cancel fee	On-timeN/A

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$484+ Cheap flights from London (LON) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/16. 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 September 26, 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 September 26, 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 September 26, 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 September 26, 2026.

Last-minute flights from London to Dulles IntlDiscover last-minute flight deals from London to Dulles Intl. Data last updated September 26, 2026 and is based on user searches.

Discover last-minute flight deals from London to Dulles Intl. Data last updated September 26, 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 September 26, 2026.

Search for one-way flight options from London to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 26, 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.

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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 London to Dulles Intl in September.

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 September 26, 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

The most flights from LON to IAD are scheduled on a Friday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 on average).

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

Airfare is below average for this route at the moment.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $608 and $786 in October.The cheapest round-trip price found within the last 5 days was $549 on United Airlines (Oct 13-Oct 23).

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

About 15% 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?

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

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

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Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 26, 2026.

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Find flights from London to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.

London and Dulles Intl flights

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 September 26, 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 September 26, 2026.

Last-minute flights from London to Dulles Intl
Discover last-minute flight deals from London to Dulles Intl. Data last updated September 26, 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 September 26, 2026.

London to Washington, D.C. Dulles Intl Airport flights typically cost between $608 and $786 in October.
The cheapest round-trip price found within the last 5 days was $549 on United Airlines (Oct 13-Oct 23).