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Dulles Intl

$377+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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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 December 18, 2025.

This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/252:45 pmLHR - IAD
1 stop22h 57mAmerican Airlines
Thu 1/151:08 pmIAD - LHR
1 stop13h 12mAmerican Airlines
Deal found 12/16$623
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:10 pmLHR - IAD
Nonstop8h 25mAmerican Airlines
Wed 1/286:20 pmIAD - LHR
Nonstop7h 10mAmerican Airlines
Deal found 12/16$638
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
Thu 12/2512:10 pmLHR - IAD
Nonstop8h 25mBritish Airways
Sat 1/246:20 pmIAD - LHR
Nonstop7h 10mBritish Airways
Deal found 12/17$640
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:25 pmLHR - IAD
Nonstop8h 30mAmerican Airlines
Wed 1/215:46 pmIAD - LHR
1 stop10h 29mAmerican Airlines
Deal found 12/16$642
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:45 pmLHR - IAD
1 stop27h 42mAmerican Airlines
Wed 12/311:57 pmIAD - LHR
1 stop14h 18mAmerican Airlines
Deal found 12/17$643
This TravelUp deal was found by Cheapflights users on 12/17. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:10 pmLHR - IAD
Nonstop8h 25mBritish Airways
Sat 1/315:05 pmIAD - LHR
1 stop15h 20mBritish Airways
Deal found 12/17$645
This ChecknFly deal was found by Cheapflights users on 12/17. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/252:45 pmLHR - IAD
1 stop22h 57mFinnair
Sat 1/317:01 amIAD - LHR
2 stops18h 19mFinnair
Deal found 12/17$651
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:25 pmLHR - IAD
Nonstop8h 30mAmerican Airlines
Thu 1/159:45 pmIAD - LHR
Nonstop7h 15mAmerican Airlines
Deal found 12/17$657
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:10 pmLHR - IAD
Nonstop8h 25mAmerican Airlines
Wed 12/311:57 pmIAD - LHR
1 stop12h 23mAmerican Airlines
Deal found 12/17$673
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
Thu 12/256:40 amLHR - IAD
1 stop15h 35mScandinavian Airlines
Sat 1/248:30 pmIAD - LHR
1 stop14h 30mScandinavian Airlines
Deal found 12/17$678
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
Mon 12/299:50 amLCY - IAD
1 stop15h 25mLufthansa
Thu 2/196:00 pmIAD - LCY
1 stop10h 20mLufthansa
Deal found 12/17$678
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/247:40 pmLGW - IAD
2 stops24h 35mMultiple Airlines
Sun 1/118:35 amIAD - LGW
1 stop20h 25mMultiple Airlines
Deal found 12/16$732

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 December 18, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$523
(Mytrip)

One-way from

$377
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$798

Good round-trip deal

$680 or less

Good one-way deal

$706 or less
Provider with most accurate pricing for London (LON)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. (WAS) flights.
Search Deals
From United Kingdom to Washington, D.C. Dulles Intl
Search Deals
One-way flight from United Kingdom to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 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 United Kingdom to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from United Kingdom to Washington, D.C. Dulles Intl.
Search Deals

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 December 18, 2025.
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

GlasgowWashington, D.C.

GLA - IAD

GLAIAD

Glasgow Intl

Wed 1/14

7:45 am-6:30 pm

2 stops15h 45m

Washington, D.C. Dulles Intl

Wed 1/21

7:40 pm-9:00 pm

2 stops20h 20m

$523

GlasgowWashington, D.C.

GLA - IAD

GLAIAD

Glasgow Intl

Thu 1/15

11:15 am-6:30 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Thu 1/22

7:40 pm-9:55 am

1 stop9h 15m

$595

BirminghamWashington, D.C.

BHX - IAD

BHXIAD

Birmingham

Sun 2/1

7:10 pm-5:15 pm

1 stop27h 05m

Washington, D.C. Dulles Intl

Mon 2/16

8:30 pm-6:30 pm

1 stop17h 00m

$615

BirminghamWashington, D.C.

BHX - IAD

BHXIAD

Birmingham

Fri 1/30

7:55 am-3:35 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Fri 2/6

5:05 pm-1:50 pm

1 stop15h 45m

$620

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 1/25

10:35 am-3:20 pm

2 stops33h 45m

Washington, D.C. Dulles Intl

Sat 1/31

8:30 pm-4:00 pm

1 stop14h 30m

$621

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 1/20

7:30 am-11:12 pm

2 stops20h 42m

Washington, D.C. Dulles Intl

Sun 2/1

9:45 pm-10:00 am

Nonstop7h 15m

$623

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Tue 1/27

7:00 am-6:30 pm

1 stop16h 30m

Washington, D.C. Dulles Intl

Tue 2/3

7:40 pm-2:50 pm

1 stop14h 10m

$624

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Thu 2/26

6:00 am-6:30 pm

1 stop17h 30m

Washington, D.C. Dulles Intl

Tue 3/3

7:40 pm-2:50 pm

1 stop14h 10m

$624

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 1/21

8:50 am-3:35 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Mon 2/2

9:45 pm-10:00 am

Nonstop7h 15m

$627

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/23

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 2/1

7:40 pm-10:55 am

1 stop10h 15m

$631

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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 July is currently the most expensive (average of $702). 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 December 18, 2025.

It’s typically best to fly out from United Kingdom to Washington, D.C. Dulles Intl Airport in the afternoon. Doing so could potentially save you 11% on the flight price compared to flying at noon, which is usually more expensive.

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 December 18, 2025.

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

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

Which airline has the best punctuality record on 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 December 18, 2025.
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.
Virgin Atlantic
7.5
Good
675 reviews

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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
9,092 reviews
Virgin Atlantic
7.5
Good
675 reviews

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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!
Aer Lingus
7.2
Good
1,395 reviews
Virgin Atlantic
7.5
Good
675 reviews

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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
591 reviews
Virgin Atlantic
7.5
Good
675 reviews

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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
7,585 reviews
Virgin Atlantic
7.5
Good
675 reviews

Crew

8.2

Boarding

7.7

Food

6.9

Overall

7.5

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 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 $595, Icelandair can have you in Washington, D.C. Dulles Intl Airport from United Kingdom in 12h 15m. Airlines will cover a distance of 3426 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 Scandinavian Airlines. According to our data, you can fly for as low as $358. Users have also found prices from $453 and $480 on TAP AIR PORTUGAL and Icelandair, respectively.

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

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

  • 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 KLM (92%), Air France (87%) or Delta (87%) 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 $1,887, our data shows the cheapest flight currently is $572. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay $529 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 July is currently the most expensive (average of $702). 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
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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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.
Heathrow to Dulles Intl flights
Charles de Gaulle to Dulles Intl flights
Frankfurt to Dulles Intl flights
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Gatwick to Baltimore flights
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Bruxelles-National to Baltimore flights
Bruxelles-National to Reagan-National flights
Frankfurt to Reagan-National flights
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Frederic Chopin to Baltimore flights
Berlin to Baltimore flights
Dublin to Reagan-National flights
Berlin to Reagan-National flights
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Vienna to Reagan-National flights
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Amsterdam to Reagan-National flights
Munich to Baltimore flights
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Luton to Baltimore flights

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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$926FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$390Average$883FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$730FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$842FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$559Average$711FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$898FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$590Average$859FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$593Average$786FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%

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