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$205+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 July 27, 2026.

This Mytrip deal was found by Cheapflights users on 7/25. 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 9/2210:35 pm
IAD
-
STN
2 stops17h 25m
Multiple Airlines
Mon 9/285:20 pm
STN
-
IAD
2 stops32h 15m
Multiple Airlines
Deal found 7/25$620
This deal was found by Cheapflights users on 7/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:30 pm
IAD
-
LHR
1 stop15h 25m
TAP AIR PORTUGAL
Fri 12/48:15 am
LHR
-
IAD
1 stop17h 20m
TAP AIR PORTUGAL
Deal found 7/26$620
This Mytrip deal was found by Cheapflights users on 7/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:20 pm
IAD
-
STN
2 stops20h 00m
Multiple Airlines
Tue 9/158:25 pm
STN
-
IAD
3 stops25h 35m
Multiple Airlines
Deal found 7/26$621
This Norse deal was found by Cheapflights users on 7/26. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:32 pm
IAD
-
LGW
1 stop15h 28m
Multiple Airlines
Tue 8/252:00 pm
LGW
-
IAD
1 stop25h 07m
Multiple Airlines
Deal found 7/26$621
This Mytrip deal was found by Cheapflights users on 7/25. 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 10/145:45 pm
IAD
-
LTN
2 stops15h 10m
Multiple Airlines
Sun 10/1812:45 pm
LTN
-
IAD
2 stops31h 25m
Multiple Airlines
Deal found 7/25$621
This Booking.com deal was found by Cheapflights users on 7/25. 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.
Sat 9/198:20 pm
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Mon 9/216:40 am
LHR
-
IAD
2 stops15h 20m
Scandinavian Airlines
Deal found 7/25$621
This Mytrip deal was found by Cheapflights users on 7/25. 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 9/1410:35 pm
IAD
-
LGW
2 stops20h 20m
Multiple Airlines
Tue 9/226:10 pm
LGW
-
IAD
2 stops26h 00m
Multiple Airlines
Deal found 7/25$622
This Mytrip deal was found by Cheapflights users on 7/27. 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 11/128:30 pm
IAD
-
LGW
3 stops30h 30m
Multiple Airlines
Tue 11/175:40 pm
LGW
-
IAD
2 stops28h 35m
Multiple Airlines
Deal found 7/27$623
This Mytrip deal was found by Cheapflights users on 7/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:05 pm
IAD
-
LGW
2 stops24h 45m
Multiple Airlines
Mon 10/129:15 am
LGW
-
IAD
2 stops34h 55m
Multiple Airlines
Deal found 7/26$624
This Mytrip deal was found by Cheapflights users on 7/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:20 pm
IAD
-
STN
3 stops18h 05m
Multiple Airlines
Tue 9/158:25 pm
STN
-
IAD
2 stops25h 35m
Multiple Airlines
Deal found 7/26$625
This Mytrip deal was found by Cheapflights users on 7/24. 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 10/18:20 pm
IAD
-
LGW
3 stops34h 55m
Multiple Airlines
Tue 10/67:55 pm
LGW
-
IAD
2 stops26h 05m
Multiple Airlines
Deal found 7/24$625
This Mytrip deal was found by Cheapflights users on 7/25. 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
IAD
-
STN
2 stops16h 50m
Multiple Airlines
Mon 9/288:45 pm
STN
-
IAD
2 stops23h 25m
Multiple Airlines
Deal found 7/25$626

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 July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$620
(Mytrip)

One-way from

$205
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$995

Good round-trip deal

$804 or less

Good one-way deal

$377 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. 21% potential increase in price ($229 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 27, 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 - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 9/28

1:15 pm-8:15 pm

2 stops26h 00m

London Luton

Thu 10/8

8:50 pm-7:45 pm

2 stops27h 55m

$714

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Fri 10/23

1:15 pm-9:05 pm

2 stops26h 50m

London Luton

Thu 10/29

9:10 am-12:45 pm

2 stops31h 35m

$738

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Thu 11/12

7:40 pm-10:45 am

1 stop10h 05m

Manchester

Mon 11/16

11:55 am-6:30 pm

1 stop11h 35m

$755

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Mon 11/30

7:40 pm-10:45 am

1 stop10h 05m

Manchester

Wed 2/3

11:55 am-6:30 pm

1 stop11h 35m

$755

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Sun 10/4

11:20 pm-1:25 pm

1 stop9h 05m

Glasgow Intl

Wed 10/14

2:20 pm-10:15 pm

1 stop12h 55m

$760

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Thu 10/8

10:35 pm-11:00 pm

2 stops19h 25m

London Luton

Sat 10/17

6:15 pm-3:10 pm

2 stops25h 55m

$768

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Thu 1/14

7:40 pm-9:05 pm

2 stops20h 25m

London Luton

Sun 1/24

9:30 pm-7:05 pm

2 stops26h 35m

$774

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 8/21

8:20 pm-6:30 pm

2 stops17h 10m

London Heathrow

Wed 8/26

7:05 am-5:00 pm

2 stops14h 55m

$776

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 11/4

10:30 pm-10:00 am

2 stops30h 30m

London Gatwick

Wed 11/11

4:35 pm-3:15 pm

1 stop27h 40m

$792

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 11/2

5:25 pm-8:35 pm

2 stops22h 10m

London Gatwick

Sun 11/8

10:40 am-8:35 pm

1 stop14h 55m

$793

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $693). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,271). 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 July 27, 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 July 27, 2026.

The most flights from IAD to GB0 are scheduled on a Friday (34 on average). You will have fewer flight options on Thursday, 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 180 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?

Saturday 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 14% of flights being delayed.

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

Booking 85 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 July 27, 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
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

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
694 reviews
Virgin Atlantic
7.5
Good
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

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
10,045 reviews
Virgin Atlantic
7.5
Good
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

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
7.3
Good
1,682 reviews
Virgin Atlantic
7.5
Good
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

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
715 reviews
Virgin Atlantic
7.5
Good
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

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
8,128 reviews
Virgin Atlantic
7.5
Good
694 reviews

Crew

8.1

Overall

7.5

Entertainment

7.5

Boarding

7.7

Food

6.9

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

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

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to 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 Icelandair, Scandinavian Airlines, and TAP AIR PORTUGAL fly from Washington, D.C. Dulles Intl Airport to United Kingdom in about 10h 05m. The time it takes to get you to your destination can typically vary by up to 20h 25m. The distance between Washington, D.C. Dulles Intl Airport and United Kingdom is about 3553 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: KLM (76%), Air France (76%), Delta( 76%).

  • 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 $267. On average you can expect to pay $2,776. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $608.

  • 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 $693). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,271). 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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Reagan-National to Madrid flights
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Baltimore to Dublin flights
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Baltimore to Athens flights
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Baltimore to Frankfurt flights
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Baltimore to Barcelona-El Prat flights
Reagan-National to Barcelona-El Prat flights

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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$309Average$541FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$374Average$882FlexibilityNo cancel feeOn-time72%
IcelandairCheapest$487Average$683FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$520Average$916FlexibilityNo cancel feeOn-time70%
DeltaCheapest$530Average$890FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$560Average$798FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$576Average$1,026FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$577Average$973FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$581Average$993FlexibilityNo cancel feeOn-time77%
IberiaCheapest$584Average$758FlexibilityNo cancel feeOn-time77%

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