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$370+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in September or October, booked 13 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:31 pmIAD - LHR
1 stop12h 44mMultiple Airlines
Wed 1/147:30 amLHR - IAD
1 stop12h 05mMultiple Airlines
Deal found 12/10$574
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - LGW
1 stop10h 15mIcelandair
Tue 1/1311:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$575
This KAYAK deal was found by Cheapflights users on 12/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - LGW
1 stop10h 15mIcelandair
Thu 1/1511:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$577
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:40 pmIAD - LGW
1 stop10h 15mIcelandair
Tue 1/1311:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$579
This KAYAK deal was found by Cheapflights users on 12/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:40 pmIAD - LGW
1 stop10h 15mIcelandair
Thu 1/1511:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$592
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 pmIAD - LHR
1 stop17h 50mLufthansa
Wed 1/147:40 amLHR - IAD
1 stop12h 55mLufthansa
Deal found 12/11$594
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:08 pmIAD - LHR
1 stop30h 12mUnited Airlines
Tue 1/139:00 amLHR - IAD
1 stop12h 40mUnited Airlines
Deal found 12/10$605
This FlightHub deal was found by Cheapflights users on 12/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:40 pmIAD - LGW
1 stop10h 15mIcelandair
Mon 1/1211:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$606
This Air Canada deal was found by Cheapflights users on 12/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:08 pmIAD - LHR
1 stop30h 12mAir Canada
Tue 1/136:50 amLHR - IAD
2 stops33h 45mAir Canada
Deal found 12/11$608
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:06 pmIAD - LHR
1 stop11h 14mDelta
Thu 1/158:40 amLHR - IAD
1 stop12h 25mDelta
Deal found 12/10$610
This Air Canada deal was found by Cheapflights users on 12/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:15 pmIAD - LHR
1 stop12h 55mAir Canada
Wed 1/146:50 amLHR - IAD
2 stops14h 34mAir Canada
Deal found 12/11$611
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - LGW
1 stop10h 15mIcelandair
Mon 1/1211:55 amLGW - IAD
1 stop11h 35mIcelandair
Deal found 12/10$612

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 December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$571
(Mytrip)

One-way from

$370
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$921

Good round-trip deal

$691 or less

Good one-way deal

$422 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. 13% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from 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 December 12, 2025.
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

Dulles Intl

Fly to

London

Route

Depart

Return

Price

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 1/26

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Mon 2/2

11:00 am-2:35 pm

2 stops32h 35m

$574

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 1/24

12:23 pm-9:20 am

2 stops15h 57m

London Heathrow

Sat 1/31

6:40 am-6:50 pm

2 stops17h 10m

$574

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Sat 1/31

8:30 pm-8:55 pm

2 stops19h 25m

London Luton

Fri 2/6

9:45 pm-6:50 pm

2 stops26h 05m

$575

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 1/23

10:30 pm-3:45 pm

1 stop12h 15m

London Gatwick

Sun 2/1

10:40 am-9:00 pm

1 stop15h 20m

$578

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Sat 1/24

7:40 pm-4:05 pm

2 stops15h 25m

London Luton

Sat 1/31

9:00 am-6:30 pm

2 stops14h 30m

$582

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 2/2

8:30 pm-6:15 pm

2 stops16h 45m

London Luton

Fri 2/6

2:35 pm-6:50 pm

2 stops33h 15m

$584

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 2/26

5:30 pm-3:50 pm

1 stop17h 20m

London Gatwick

Thu 3/5

4:00 pm-9:00 pm

1 stop34h 00m

$586

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 3/24

1:19 pm-4:00 pm

2 stops22h 41m

London Heathrow

Tue 4/7

7:50 pm-4:50 pm

2 stops26h 00m

$590

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 3/21

9:30 pm-5:40 pm

1 stop16h 10m

London Heathrow

Sat 3/28

10:20 am-7:50 pm

1 stop13h 30m

$591

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/29

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Sun 2/1

9:05 am-9:00 pm

2 stops16h 55m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 60 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
JetabroadPrice Accuracy3 starsTrust Score*1 star
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-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 Washington, D.C. Dulles Intl Airport-London flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Washington, D.C. Dulles Intl Airport-London flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to London. Price data was last updated on December 5, 2025.

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 13 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.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $423). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $745). 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 December 12, 2025.

When flying from Washington, D.C. Dulles Intl Airport to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 47% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to London. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to London flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 12, 2025.

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

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.

Reykjavik (KEF) – chosen by Cheapflights users on 71% 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.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $479.

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 40m.

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 Reykjavik (KEF) 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 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 159 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening 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 Saturday 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 15% of flights being delayed.

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
Airports
IAD

For evening departures, expect crowded check-in areas at IAD. Arrive early to navigate the busy terminals efficiently.

Read more about IADBy Ramsey Qubein
LHR

For a quick city transfer, take the Heathrow Express to Paddington Station. It's the fastest way to reach central London.

Read more about LHRBy Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

Ramsey Qubein

Ramsey Qubein

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 December 12, 2025.
Get a feel of what it's like to fly with Virgin Atlantic, United Airlines, and Icelandair 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
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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
675 reviews
Virgin Atlantic
7.5
Good
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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
9,093 reviews
Virgin Atlantic
7.5
Good
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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
589 reviews
Virgin Atlantic
7.5
Good
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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!
Iberia
7.0
Good
3,045 reviews
Virgin Atlantic
7.5
Good
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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
7,571 reviews
Virgin Atlantic
7.5
Good
675 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

Entertainment

7.5

Comfort

7.3

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 TAP AIR PORTUGAL, Scandinavian Airlines, and Turkish Airlines fly from Washington, D.C. Dulles Intl Airport to London in about 11h 20m. The time it takes to get you to your destination can typically vary by up to 4h 37m. 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 ($395), Lufthansa ($397), and Scandinavian Airlines ($424) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. TAP AIR PORTUGAL is priced at 45% 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 Icelandair, with whom users have recently found tickets for as low as $182. However, be on the lookout for offers from Scandinavian Airlines and TAP AIR PORTUGAL, 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 City 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: Air France (90%), Delta (90%), Virgin Atlantic (90%).

  • 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 $2,094, our data shows the cheapest flight currently is $346. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $423 for that flight.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London?

    Of the flights from Washington, D.C. Dulles Intl Airport to London that have layovers, most of them stop in Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool more than anywhere else. Hallgrímskirkja, Harpa and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl if you are interested in checking them out. Those landing in Reykjavik looking to spend some time exploring during their layover can rent a car for about $50 per day.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London flights?

    The least popular layover on flights from Washington, D.C. Dulles Intl Airport to London is Dublin.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $423). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $745). 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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Alternative routes for Dulles Intl to London

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Baltimore to Heathrow flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
Dulles Intl to Stansted flights
Dulles Intl to Luton flights
Dulles Intl to Edinburgh flights
Baltimore to Luton flights
Reagan-National to Luton flights
Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
Baltimore to Stansted flights
Reagan-National to Manchester flights
Reagan-National to London City flights
Baltimore to London City flights
Dulles Intl to Newcastle upon Tyne flights
Dulles Intl to Leeds flights
Reagan-National to Stansted flights
Baltimore to Newcastle upon Tyne flights
Reagan-National to Newcastle upon Tyne flights
Baltimore to Leeds flights
Reagan-National to Leeds flights
Dulles Intl to Birmingham flights
Baltimore to Birmingham flights
Dulles Intl to Liverpool flights
Reagan-National to Birmingham flights
Baltimore to Liverpool flights
Dulles Intl to Southampton flights
Reagan-National to Liverpool flights
Dulles Intl to Bristol flights
Dulles Intl to Southend flights
Baltimore to Southampton flights
Baltimore to Bristol flights
Reagan-National to Bristol flights
Reagan-National to Southampton flights
Baltimore to Newquay flights
Dulles Intl to Newquay flights
Dulles Intl to Exeter flights
Reagan-National to Newquay flights
Baltimore to Exeter flights
Dulles Intl to Doncaster flights
Baltimore to East Midlands flights
Reagan-National to East Midlands flights

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$395Average$566FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$397Average$937FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$424Average$589FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$427Average$652FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$544Average$768FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$556Average$781FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$556Average$759FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$559Average$815FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$564Average$809FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$573Average$798FlexibilityNo cancel feeOn-time71%

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