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$250+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in January or September, booked 81 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Find 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 October 28, 2025.

This KAYAK deal was found by Cheapflights users on 10/26. 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 11/107:40 pmIAD - LHR
1 stop10h 10mIcelandair
Mon 11/178:35 pmLHR - IAD
1 stop26h 55mIcelandair
Deal found 10/26$561
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/199:45 amIAD - LTN
2 stops31h 35mMultiple Airlines
Thu 11/278:50 pmLTN - IAD
2 stops24h 00mMultiple Airlines
Deal found 10/28$563
This lastminute.com deal was found by Cheapflights users on 10/26. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2711:20 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Tue 11/49:00 amLHR - IAD
1 stop12h 35mVirgin Atlantic
Deal found 10/26$563
This Mytrip deal was found by Cheapflights users on 10/27. 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 11/194:30 pmIAD - STN
3 stops18h 35mMultiple Airlines
Fri 11/287:30 amSTN - IAD
2 stops18h 24mMultiple Airlines
Deal found 10/27$564
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Thu 11/137:40 pmIAD - LGW
2 stops13h 45mMultiple Airlines
Tue 11/188:50 amLGW - IAD
2 stops14h 40mMultiple Airlines
Deal found 10/27$564
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/249:45 amIAD - LTN
2 stops29h 25mMultiple Airlines
Tue 12/28:50 pmLTN - IAD
2 stops24h 00mMultiple Airlines
Deal found 10/28$564
This Mytrip deal was found by Cheapflights users on 10/28. 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 12/19:45 amIAD - STN
2 stops26h 10mMultiple Airlines
Wed 12/108:55 pmSTN - IAD
2 stops28h 10mMultiple Airlines
Deal found 10/28$565
This oojo deal was found by Cheapflights users on 10/26. 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 11/295:30 pmIAD - LGW
2 stops22h 10mTAP AIR PORTUGAL
Sun 12/710:40 amLGW - IAD
1 stop33h 35mTAP AIR PORTUGAL
Deal found 10/26$566
This Booking.com deal was found by Cheapflights users on 10/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:20 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Tue 11/114:50 pmLHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 10/27$566
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/244:30 pmIAD - STN
3 stops25h 10mMultiple Airlines
Wed 12/38:05 amSTN - IAD
2 stops17h 00mMultiple Airlines
Deal found 10/28$567
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2310:20 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Tue 12/24:50 pmLHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 10/28$567
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/119:45 amIAD - STN
3 stops19h 05mMultiple Airlines
Mon 11/179:45 pmSTN - IAD
2 stops23h 05mMultiple Airlines
Deal found 10/28$568

Cheap 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 October 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$561
(oojo)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$634

Good round-trip deal

$704 or less

Good one-way deal

$421 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. 14% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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).
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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 October 28, 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 - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 11/3

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Tue 3/3

9:00 am-4:35 pm

1 stop12h 35m

$577

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/26

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Fri 12/5

9:00 am-4:35 pm

1 stop12h 35m

$577

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/12

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Wed 11/19

9:00 am-4:35 pm

1 stop12h 35m

$577

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Tue 12/2

7:40 pm-8:05 pm

2 stops19h 25m

London Luton

Wed 12/10

6:50 am-6:30 pm

2 stops16h 40m

$582

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/5

5:10 pm-8:45 am

1 stop10h 35m

London Heathrow

Thu 11/13

6:20 am-4:35 pm

1 stop15h 15m

$582

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 11/3

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Tue 11/11

4:50 pm-8:30 pm

Nonstop8h 40m

$585

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 11/18

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Fri 12/12

4:50 pm-8:30 pm

Nonstop8h 40m

$585

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 11/3

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Fri 11/14

4:50 pm-8:30 pm

Nonstop8h 40m

$585

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 12/7

10:20 pm-10:50 am

Nonstop7h 30m

London Heathrow

Tue 12/16

4:50 pm-8:30 pm

Nonstop8h 40m

$585

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 11/9

3:35 pm-7:50 am

1 stop11h 15m

London Heathrow

Tue 11/18

4:50 pm-8:30 pm

Nonstop8h 40m

$589

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

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 October.
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
GurufarePrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
JetabroadPrice Accuracy3 starsTrust 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 October 24, 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 81 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 $432). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $748). 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 October 28, 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.

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

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 73% 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.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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 October 28, 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
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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
670 reviews
Virgin Atlantic
7.5
Good
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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
9,001 reviews
Virgin Atlantic
7.5
Good
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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
7.1
Good
562 reviews
Virgin Atlantic
7.5
Good
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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!
Iberia
7.0
Good
3,001 reviews
Virgin Atlantic
7.5
Good
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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
7,483 reviews
Virgin Atlantic
7.5
Good
670 reviews

Entertainment

7.5

Boarding

7.7

Crew

8.1

Food

6.9

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 Delta, Virgin Atlantic, and KLM fly from Washington, D.C. Dulles Intl Airport to London in about 7h 30m. The time it takes to get you to your destination can typically vary by up to 2h 15m. Washington, D.C. Dulles Intl Airport and London are separated by a distance of 3664 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, PLAY ($372), TAP AIR PORTUGAL ($395), and Lufthansa ($397) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. PLAY is priced at 49% 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 $349. However, be on the lookout for offers from SWISS and United Airlines, 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: American Airlines (86%), British Airways (86%), Aer Lingus (84%).

  • 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 $2,165, our data shows the cheapest flight currently is $371. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $409 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 Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool more than anywhere else. Harpa, Hallgrímskirkja and Laugardalslaug Geothermal Pool are located about 23.3 mi, 23.2 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 $48 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 $432). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $748). 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
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
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Dulles Intl to Stansted flights
Dulles Intl to Luton flights
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Dulles Intl to Edinburgh flights
Baltimore to London City flights
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Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
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Baltimore to Stansted flights
Reagan-National to Stansted flights
Dulles Intl to Liverpool flights
Dulles Intl to Leeds flights
Dulles Intl to Birmingham flights
Reagan-National to Birmingham flights
Baltimore to Birmingham flights
Dulles Intl to Southampton flights
Dulles Intl to Southend flights
Dulles Intl to Bristol flights
Baltimore to Bristol flights
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Baltimore to Leeds flights
Dulles Intl to Newcastle upon Tyne flights
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Reagan-National to Newcastle upon Tyne flights
Baltimore to Southampton flights
Reagan-National to Leeds flights
Reagan-National to Southampton flights
Reagan-National to Liverpool flights
Baltimore to Newquay flights
Dulles Intl to Newquay flights
Baltimore to Southend flights
Dulles Intl to Exeter flights
Baltimore to Exeter flights
Dulles Intl to Bournemouth flights
Reagan-National to Newquay 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$372Average$441FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$395Average$604FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$397Average$888FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$424Average$596FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$433Average$677FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$547Average$777FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$549Average$758FlexibilityNo cancel feeOn-time67%
DeltaCheapest$561Average$828FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$562Average$805FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$562Average$818FlexibilityNo cancel feeOn-time72%

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