Dulles Intl

$300+ Cheap flights from the United Kingdom to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
Mar 5 — Mar 121
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Cheap flight deals from United Kingdom to Dulles Intl

Cheapest flights from United Kingdom to Dulles Intl
Explore the most affordable flight options available from United Kingdom to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This Austrian Airlines deal was found by Cheapflights users on 2/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/221:55 pm
LHR
-
IAD
1 stop29h 45m
Austrian Airlines
Sat 3/75:10 pm
IAD
-
LHR
1 stop31h 45m
Austrian Airlines
Deal found 2/1$538
This Lufthansa deal was found by Cheapflights users on 1/31. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/229:00 am
LHR
-
IAD
1 stop12h 40m
Multiple Airlines
Sat 3/75:40 pm
IAD
-
LHR
1 stop11h 45m
Multiple Airlines
Deal found 1/31$539
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/62:00 pm
LGW
-
IAD
1 stop22h 24m
Multiple Airlines
Mon 3/168:09 am
IAD
-
LGW
1 stop21h 51m
Multiple Airlines
Deal found 2/2$539
This Austrian Airlines deal was found by Cheapflights users on 2/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:00 am
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Fri 2/276:00 pm
IAD
-
LHR
1 stop19h 40m
Austrian Airlines
Deal found 2/1$541
This Lufthansa deal was found by Cheapflights users on 1/31. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:30 am
LHR
-
IAD
1 stop12h 20m
Multiple Airlines
Sun 3/89:30 pm
IAD
-
LHR
1 stop11h 30m
Multiple Airlines
Deal found 1/31$543
This Austrian Airlines deal was found by Cheapflights users on 2/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:00 am
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Sun 2/226:00 pm
IAD
-
LHR
1 stop15h 05m
Austrian Airlines
Deal found 2/1$544
This Austrian Airlines deal was found by Cheapflights users on 2/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/126:00 am
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Thu 2/196:00 pm
IAD
-
LHR
1 stop15h 05m
Austrian Airlines
Deal found 2/1$545
This The Travel House deal was found by Cheapflights users on 2/2. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:55 am
LGW
-
IAD
1 stop11h 35m
Icelandair
Tue 3/178:40 pm
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 2/2$545
This SWISS deal was found by Cheapflights users on 1/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:55 pm
LHR
-
IAD
1 stop26h 45m
SWISS
Sat 3/75:25 pm
IAD
-
LHR
1 stop12h 50m
SWISS
Deal found 1/31$547
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:55 am
LGW
-
IAD
1 stop11h 35m
Icelandair
Wed 3/118:40 pm
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 2/2$548
This Austrian Airlines deal was found by Cheapflights users on 2/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:50 pm
LHR
-
IAD
1 stop28h 50m
Austrian Airlines
Sat 2/216:00 pm
IAD
-
LHR
1 stop33h 20m
Austrian Airlines
Deal found 2/1$549
This Lufthansa deal was found by Cheapflights users on 2/1. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/218:30 am
LHR
-
IAD
1 stop12h 20m
Multiple Airlines
Sat 3/76:20 pm
IAD
-
LHR
Nonstop7h 20m
Multiple Airlines
Deal found 2/1$554

Find flight deals from United Kingdom to Dulles Intl

Keep the following information in mind while searching for United Kingdom to Dulles Intl flight deals. Data was last updated February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$538
(Austrian Airlines)

One-way from

$300
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$606

Good round-trip deal

$571 or less

Good one-way deal

$635 or less
Provider with most accurate pricing for London (LON)-Washington, D.C. (WAS) flight deals.
Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. (WAS) flights.
From United Kingdom to Washington, D.C. Dulles Intl
One-way flight from United Kingdom to Washington, D.C. Dulles Intl
Highest demand for flights based on searches. 12% potential increase in price ($104 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in February 2026
Price to beat on a round-trip flight from United Kingdom to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from United Kingdom to Washington, D.C. Dulles Intl.

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom to Dulles Intl 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 February 3, 2026.
Use the filters below to find and compare flights from the United Kingdom to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

United Kingdom

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 2/21

6:55 pm-4:40 pm

1 stop26h 45m

Washington, D.C. Dulles Intl

Sat 3/7

5:25 pm-11:15 am

1 stop12h 50m

$547

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 2/21

8:30 am-3:50 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Sat 3/7

6:20 pm-6:40 am

Nonstop7h 20m

$558

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 2/21

8:30 am-3:50 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Sun 3/8

7:20 pm-6:40 am

Nonstop7h 20m

$558

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 2/16

8:30 am-3:50 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Mon 2/23

6:20 pm-6:40 am

Nonstop7h 20m

$559

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 2/13

6:00 am-2:40 pm

1 stop13h 40m

Washington, D.C. Dulles Intl

Fri 2/20

6:00 pm-2:05 pm

1 stop15h 05m

$560

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 3/6

2:00 pm-7:24 am

1 stop22h 24m

Washington, D.C. Dulles Intl

Mon 3/16

2:58 pm-10:00 am

2 stops15h 02m

$575

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 3/6

9:00 am-4:40 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Tue 3/10

9:30 pm-1:00 pm

1 stop11h 30m

$588

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 3/18

2:50 pm-3:40 pm

1 stop28h 50m

Washington, D.C. Dulles Intl

Tue 3/24

5:26 pm-11:15 am

1 stop13h 49m

$590

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 3/5

9:00 am-4:40 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Mon 3/9

12:55 pm-7:10 am

2 stops14h 15m

$591

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 2/23

6:00 am-2:40 pm

1 stop13h 40m

Washington, D.C. Dulles Intl

Sun 3/8

11:15 pm-10:50 am

Nonstop7h 35m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Dulles Intl

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

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

Currently, February is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. Dulles Intl Airport (average of $346). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $629). 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 GB to IAD?

Find hourly flight availability from United Kingdom to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 3, 2026.

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

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

Explore weekly flight availability from United Kingdom to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 3, 2026.

The most flights from GB0 to IAD are scheduled on a Tuesday (26 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (20 on average).

How often are flights from the United Kingdom to Washington, D.C. delayed?

About 17% of weekly flights between United Kingdom and Washington, D.C. have experienced delays in the past year, with the average delay time being 131 minutes.

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

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

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

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

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

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated February 3, 2026.
Read reviews from past customers who have flown Virgin Atlantic, United Airlines, and Aer Lingus from the United Kingdom to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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!

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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!

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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!

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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!

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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!

Boarding

7.7

Entertainment

7.6

Overall

7.5

Comfort

7.3

Food

6.9

Crew

8.2

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 United Kingdom to Dulles Intl. 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 United Kingdom to Washington, D.C. Dulles Intl Airport?

    For as low as $558, SWISS can have you in Washington, D.C. Dulles Intl Airport from United Kingdom in 12h 20m. Airlines will cover a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as $459. Users have also found prices from $466 and $485 on TAP AIR PORTUGAL and Virgin Atlantic, respectively.

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

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

    No one likes to see their flight delayed. When booking a flight from United Kingdom to Washington, D.C. Dulles Intl Airport consider choosing Air Canada (84%), Austrian Airlines (84%) or Copa Airlines (84%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from United Kingdom to Washington, D.C. Dulles Intl Airport is generally $1,244, our data shows the cheapest flight currently is $501. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay $455 for that flight.

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

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. Dulles Intl Airport (average of $346). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $629). 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.

See more FAQs

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

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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Alternative routes for United Kingdom to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from United Kingdom to Dulles Intl

Discover the top 10 airlines that operate flights from United Kingdom to Dulles Intl. 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$271Average$883FlexibilityNo cancel feeOn-time77%
DeltaCheapest$320Average$925FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
IcelandairCheapest$466Average$836FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$473Average$730FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$559Average$711FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$562Average$772FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$567Average$886FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$572Average$806FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%

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