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$271+ Cheap flights from Dulles Intl (IAD) to London (LON)

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
Sep 1 — Sep 81
Tue 9/1
Tue 9/8
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in February or October, booked 74 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.

This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:20 pm
IAD
-
STN
2 stops23h 30m
Multiple Airlines
Tue 9/296:35 pm
STN
-
IAD
2 stops27h 25m
Multiple Airlines
Deal found 7/30$619
This oojo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/285:25 pm
IAD
-
LGW
1 stop11h 25m
TAP AIR PORTUGAL
Sun 12/610:40 am
LGW
-
IAD
1 stop14h 55m
TAP AIR PORTUGAL
Deal found 7/31$619
This deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:20 pm
IAD
-
LHR
1 stop12h 15m
Scandinavian Airlines
Thu 11/510:20 am
LHR
-
IAD
1 stop11h 55m
Scandinavian Airlines
Deal found 7/31$619
This Mytrip deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:35 pm
IAD
-
LTN
2 stops20h 10m
Multiple Airlines
Tue 9/291:40 pm
LTN
-
IAD
2 stops30h 30m
Multiple Airlines
Deal found 8/1$619
This Flightnetwork deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:35 pm
IAD
-
LGW
1 stop12h 00m
TAP AIR PORTUGAL
Tue 9/224:25 pm
LGW
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 8/1$620
This oojo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:35 pm
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Mon 10/56:00 am
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Deal found 7/31$620
This Mytrip deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:30 pm
IAD
-
STN
2 stops15h 30m
Multiple Airlines
Sun 11/81:40 pm
STN
-
IAD
2 stops32h 35m
Multiple Airlines
Deal found 7/31$621
This oojo deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:05 pm
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Tue 10/134:25 pm
LGW
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 8/1$621
This Mytrip deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 pm
IAD
-
LTN
2 stops15h 25m
Multiple Airlines
Tue 9/291:40 pm
LTN
-
IAD
2 stops35h 55m
Multiple Airlines
Deal found 8/2$621
This oojo deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:40 pm
IAD
-
LHR
1 stop11h 40m
TAP AIR PORTUGAL
Mon 10/56:00 am
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 8/1$622
This flugladen.de deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:40 pm
IAD
-
LGW
1 stop16h 30m
TAP AIR PORTUGAL
Sat 10/34:30 pm
LGW
-
IAD
1 stop27h 40m
TAP AIR PORTUGAL
Deal found 8/1$623
This Gotogate deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/110:30 pm
IAD
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Tue 11/106:00 am
LHR
-
IAD
1 stop13h 45m
TAP AIR PORTUGAL
Deal found 7/29$623

Find flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$619
(Mytrip)

One-way from

$271
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$771

Good round-trip deal

$913 or less

Good one-way deal

$465 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-London (LON) flights.
Search Deals
From Washington, D.C. Dulles Intl to London (LON)
Search Deals
One-way flight from Washington, D.C. Dulles Intl to London (LON)
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($219 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 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 Washington, D.C. Dulles Intl to London (LON).
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 2, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 1/17

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Fri 1/22

11:55 am-6:30 pm

1 stop11h 35m

$687

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 9/28

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Wed 10/7

3:40 pm-10:15 pm

1 stop11h 35m

$696

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Thu 11/5

7:40 pm-1:00 pm

1 stop12h 20m

London Luton

Sat 11/14

7:00 am-6:30 pm

1 stop16h 30m

$699

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Sat 10/3

8:30 pm-1:10 pm

1 stop11h 40m

London Luton

Wed 10/7

6:15 am-10:15 pm

1 stop21h 00m

$712

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 11/1

7:40 pm-2:50 pm

2 stops14h 10m

London Southend

Sun 11/8

3:35 pm-6:30 pm

2 stops31h 55m

$742

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Wed 9/30

9:55 am-10:55 pm

2 stops32h 00m

London Luton

Fri 10/16

8:00 am-7:00 pm

2 stops16h 00m

$743

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 9/22

10:35 pm-8:25 pm

2 stops16h 50m

London Gatwick

Wed 9/30

4:25 pm-3:10 pm

1 stop27h 45m

$771

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 9/14

8:20 pm-6:50 pm

2 stops17h 30m

London Heathrow

Sun 9/20

6:40 am-5:00 pm

2 stops15h 20m

$776

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 9/9

10:35 pm-8:30 pm

2 stops16h 55m

London Gatwick

Tue 9/15

4:25 pm-3:10 pm

1 stop27h 45m

$799

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 9/25

10:50 pm-3:40 pm

1 stop11h 50m

London Gatwick

Sat 10/3

4:30 pm-3:10 pm

1 stop27h 40m

$806

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/2

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Dulles Intl to London

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 Dulles Intl to London in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star
JetabroadPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
BusinessClassPrice Accuracy-Trust Score*3 stars
eDreamsPrice Accuracy2 starsTrust 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 Washington, D.C. Dulles Intl Airport-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-London 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 Washington, D.C. Dulles Intl Airport-London 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 Dulles Intl to London

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

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $685). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $1,274). 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 IAD to LON?

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2026.

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

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

Explore weekly flight availability from Dulles Intl to London. 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 2, 2026.

The most flights from IAD to LON are scheduled on a Friday (34 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (24 on average).

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

Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to London flights typically cost between $627 and $945 in September.
The cheapest round-trip price found within the last 5 days was $619 on Multiple Airlines (Sep 21-Sep 29).

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

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

Copenhagen (CPH) – chosen by Cheapflights users on 33% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to London on Cheapflights.

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

Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport to London, 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 $494.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 9h 58m.

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

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

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 1h 23m.

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

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 180 minutes.

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

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

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

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

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

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 14% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 19 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

The best insider tips for Washington, D.C. Dulles Intl Airport to London 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 Washington, D.C. Dulles Intl Airport to London trip
Our travel experts
Ramsey Qubein

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 more

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated August 2, 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andAmerican Airlines from Washington, D.C. Dulles Intl Airport to London by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
10,062 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
American Airlines
7.1
Good
11,845 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Icelandair
7.0
Good
719 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
8,140 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

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

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Airlines like Icelandair, TAP AIR PORTUGAL, and Scandinavian Airlines fly from Washington, D.C. Dulles Intl Airport to London in about 10h 15m. The time it takes to get you to your destination can typically vary by up to 7h 15m. Washington, D.C. Dulles Intl Airport and London are separated by a distance of 3683 mi. This flight may include one or multiple stops.

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

    According to our current data, TAP AIR PORTUGAL ($309), Virgin Atlantic ($374), and Icelandair ($489) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. TAP AIR PORTUGAL is priced at 61% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $219. However, be on the lookout for offers from KLM and Icelandair, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

    When deciding which route to take from Washington, D.C. Dulles Intl Airport to London consider Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London Stansted as they are the most popular.

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

    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 Washington, D.C. Dulles Intl Airport to London on time: KLM (76%), Air France (76%), Delta (76%).

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

    While on average a flight from Washington, D.C. Dulles Intl Airport to London is generally $2,823, our data shows the cheapest flight currently is $336. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $584 for that flight.

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

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $685). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $1,274). 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 Dulles Intl to London

Discover the top 10 airlines that operate flights from Dulles Intl to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$309Average$541FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$374Average$878FlexibilityNo cancel feeOn-time72%
IcelandairCheapest$489Average$669FlexibilityNo cancel feeOn-time76%
DeltaCheapest$530Average$895FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$560Average$798FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$569Average$894FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$581Average$993FlexibilityNo cancel feeOn-time77%
IberiaCheapest$584Average$758FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$587Average$921FlexibilityNo cancel feeOn-time69%
SWISSCheapest$593Average$860FlexibilityNo cancel feeOn-time79%

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