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$250+ Cheap flights from Dulles Intl (IAD) to the United Kingdom

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Sep 16 — Sep 231
Wed 9/16
Wed 9/23
1 adult, Economy
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Cheap flight deals from Dulles Intl to United Kingdom

Cheapest flights from Dulles Intl to United Kingdom
Explore the most affordable flight options available from Dulles Intl to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.

This Gotogate deal was found by Cheapflights users on 8/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:05 pm -
1 stop19h 40m
Wed 9/308:00 am -
1 stop17h 35m
Deal found 8/17$618
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:45 pm -
1 stop20h 05m
Sun 10/187:50 pm -
1 stop24h 20m
Deal found 8/17$626
This Mytrip deal was found by Cheapflights users on 8/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/115:40 pm -
2 stops18h 10m
Wed 10/218:20 am -
2 stops35h 50m
Deal found 8/16$627
This Gotogate deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/610:35 pm -
1 stop12h 00m
Tue 10/134:25 pm -
1 stop27h 45m
Deal found 8/13$627
This Justfly.com deal was found by Cheapflights users on 8/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:25 pm -
1 stop19h 05m
Tue 12/16:00 am -
1 stop13h 45m
Deal found 8/13$627
This Mytrip deal was found by Cheapflights users on 8/15. 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.
Fri 11/137:40 pm -
2 stops21h 40m
Fri 11/205:55 am -
2 stops17h 35m
Deal found 8/15$628
This Mytrip deal was found by Cheapflights users on 8/15. 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 10/510:35 pm -
2 stops20h 20m
Wed 10/145:05 pm -
2 stops32h 30m
Deal found 8/15$628
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Sun 10/2511:30 pm -
1 stop19h 10m
Thu 11/57:55 pm -
1 stop29h 40m
Deal found 8/14$628
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Fri 11/137:40 pm -
2 stops22h 35m
Tue 11/178:15 am -
2 stops15h 15m
Deal found 8/13$629
This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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.
Tue 9/295:05 pm -
1 stop11h 40m
Tue 10/610:35 am -
1 stop15h 00m
Deal found 8/17$629
This Mytrip deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 pm -
2 stops20h 25m
Tue 9/291:40 pm -
2 stops35h 55m
Deal found 8/14$629
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:30 pm -
1 stop18h 05m
Mon 11/166:00 am -
1 stop14h 15m
Deal found 8/17$629

Find flight deals from Dulles Intl to United Kingdom

Keep the following information in mind while searching for Dulles Intl to United Kingdom flight deals. Data was last updated August 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$616
(Mytrip)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$891

Good round-trip deal

$942 or less

Good one-way deal

$437 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
Search Deals
From Washington, D.C. Dulles Intl to United Kingdom
Search Deals
One-way flight from Washington, D.C. Dulles Intl to United Kingdom
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($212 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to United Kingdom.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to United Kingdom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Tue 10/6

8:25 pm-2:00 pm

1 stop12h 35m

London Luton

Thu 10/15

8:00 am-7:00 pm

1 stop16h 00m

$702

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Wed 10/7

10:35 pm-8:30 pm

2 stops16h 55m

London Gatwick

Tue 10/13

4:25 pm-3:10 pm

1 stop27h 45m

$742

Washington, D.C.Glasgow

IAD Washington, D.C. Dulles Intl - GLA Glasgow Intl

IADGLA

Washington, D.C. Dulles Intl

Mon 10/5

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Tue 10/20

2:20 pm-7:20 pm

1 stop10h 00m

$762

Washington, D.C.Glasgow

IAD Washington, D.C. Dulles Intl - GLA Glasgow Intl

IADGLA

Washington, D.C. Dulles Intl

Mon 10/5

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Fri 10/23

2:20 pm-7:20 pm

1 stop10h 00m

$762

Washington, D.C.Glasgow

IAD Washington, D.C. Dulles Intl - GLA Glasgow Intl

IADGLA

Washington, D.C. Dulles Intl

Tue 10/6

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Tue 10/20

2:20 pm-7:20 pm

1 stop10h 00m

$762

Washington, D.C.Glasgow

IAD Washington, D.C. Dulles Intl - GLA Glasgow Intl

IADGLA

Washington, D.C. Dulles Intl

Wed 10/7

11:20 pm-1:25 pm

1 stop9h 05m

Glasgow Intl

Thu 10/22

2:20 pm-7:20 pm

1 stop10h 00m

$762

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Wed 10/14

5:45 pm-9:15 pm

2 stops22h 30m

London Luton

Sun 10/18

6:55 pm-3:10 pm

2 stops25h 15m

$763

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Sun 11/1

7:40 pm-3:05 pm

1 stop14h 25m

London Luton

Sat 11/7

7:00 am-6:30 pm

1 stop16h 30m

$777

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Wed 9/30

9:55 am-10:55 pm

2 stops32h 00m

London Luton

Wed 10/7

6:10 pm-3:35 pm

2 stops26h 25m

$780

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Wed 9/9

10:35 pm-11:20 am

2 stops31h 45m

London Gatwick

Wed 9/16

4:25 pm-3:10 pm

1 stop27h 45m

$802

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Dulles Intl to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom 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 the United Kingdom

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $690). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,273). 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 GB?

Find hourly flight availability from Dulles Intl to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2026.

When flying from Washington, D.C. Dulles Intl Airport to United Kingdom, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Explore weekly flight availability from Dulles Intl to United Kingdom. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 17, 2026.

The most flights from IAD to GB0 are scheduled on a Wednesday (29 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (27 on average).

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

About 18% of weekly flights between Washington, D.C. and United Kingdom have experienced delays in the past year, with the average delay time being 175 minutes.

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

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

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

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

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

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to United Kingdom. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated August 17, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to the United Kingdom, such as Virgin Atlantic,United Airlines, andAer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

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
692 reviews
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
10,104 reviews
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

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
7.3
Good
1,708 reviews
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

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
6.9
Okay
732 reviews
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
8,173 reviews
Virgin Atlantic
7.5
Good
692 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.6

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 United Kingdom. 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 United Kingdom?

    Airlines like TAP AIR PORTUGAL, Icelandair, and Scandinavian Airlines fly from Washington, D.C. Dulles Intl Airport to United Kingdom in about 11h 55m. The time it takes to get you to your destination can typically vary by up to 27h 10m. The distance between Washington, D.C. Dulles Intl Airport and United Kingdom is about 3426 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $149 on Virgin Atlantic. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $218 and Icelandair from $228 one-way.

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

    Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London Stansted when deciding on the best route from Washington, D.C. Dulles Intl Airport to United Kingdom.

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

    Before booking your flight to United Kingdom from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Aer Lingus (69%), Iberia (69%), KLM( 68%).

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

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to United Kingdom is $344. On average you can expect to pay $2,677. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $611.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to United Kingdom 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 United Kingdom?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $690). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,273). 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

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Alternative routes for Dulles Intl to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Dulles Intl to United Kingdom

Discover the top 10 airlines that operate flights from Dulles Intl to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$309Average$542FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$361Average$889FlexibilityNo cancel feeOn-time72%
IcelandairCheapest$487Average$691FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$520Average$921FlexibilityNo cancel feeOn-time70%
DeltaCheapest$530Average$896FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$560Average$798FlexibilityNo cancel feeOn-time77%
IberiaCheapest$575Average$758FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$577Average$983FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$581Average$1,067FlexibilityNo cancel feeOn-time77%
SWISSCheapest$593Average$860FlexibilityNo cancel feeOn-time79%

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