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$225+ 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 7/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
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 June 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/2211:20 pm
IAD
-
GLA
1 stop9h 05m
Multiple Airlines
Sat 8/157:40 am
GLA
-
IAD
2 stops32h 05m
Multiple Airlines
Deal found 6/9$679
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
Tue 8/1811:20 pm
IAD
-
GLA
1 stop9h 05m
Multiple Airlines
Tue 8/258:20 am
GLA
-
IAD
2 stops31h 25m
Multiple Airlines
Deal found 6/7$698
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 9/3011:20 pm
IAD
-
GLA
1 stop9h 05m
Multiple Airlines
Mon 10/58:40 pm
GLA
-
IAD
2 stops27h 55m
Multiple Airlines
Deal found 6/9$708
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Tue 9/2211:20 pm
IAD
-
GLA
1 stop9h 05m
Multiple Airlines
Tue 9/295:40 pm
GLA
-
IAD
2 stops30h 45m
Multiple Airlines
Deal found 6/9$715
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 9/238:30 pm
IAD
-
GLA
1 stop11h 55m
Multiple Airlines
Tue 9/295:40 pm
GLA
-
IAD
2 stops30h 45m
Multiple Airlines
Deal found 6/9$716
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
Mon 9/78:30 pm
IAD
-
GLA
1 stop11h 55m
Multiple Airlines
Mon 9/148:40 pm
GLA
-
IAD
2 stops27h 55m
Multiple Airlines
Deal found 6/7$725
This oojo deal was found by Cheapflights users on 6/9. 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.
Thu 10/158:30 pm
IAD
-
GLA
1 stop11h 55m
Icelandair
Tue 10/202:20 pm
GLA
-
IAD
1 stop10h 00m
Icelandair
Deal found 6/9$729
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/2911:05 am
IAD
-
GLA
1 stop17h 35m
Multiple Airlines
Tue 8/49:25 pm
GLA
-
IAD
2 stops42h 20m
Multiple Airlines
Deal found 6/9$737
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Sun 9/2711:20 pm
IAD
-
GLA
1 stop9h 05m
Multiple Airlines
Sun 10/46:05 pm
GLA
-
IAD
2 stops30h 20m
Multiple Airlines
Deal found 6/9$738
This oojo deal was found by Cheapflights users on 6/9. 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 10/711:20 pm
IAD
-
GLA
1 stop9h 05m
Icelandair
Tue 10/132:20 pm
GLA
-
IAD
1 stop10h 00m
Icelandair
Deal found 6/9$739
This Mytrip deal was found by Cheapflights users on 6/9. 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 8/178:30 pm
IAD
-
GLA
2 stops19h 25m
Multiple Airlines
Mon 8/249:45 pm
GLA
-
IAD
2 stops27h 39m
Multiple Airlines
Deal found 6/9$740
This Mytrip deal was found by Cheapflights users on 6/6. 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 8/258:30 pm
IAD
-
BHX
2 stops19h 55m
Multiple Airlines
Tue 9/812:40 pm
BHX
-
IAD
2 stops31h 30m
Multiple Airlines
Deal found 6/6$779

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$679
(Kiwi.com)

One-way from

$225
(Expedia)

Popular in

June

Cheapest in

February

Average price

$1,212

Good round-trip deal

$1,021 or less

Good one-way deal

$521 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 ($200 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 10, 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.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Tue 8/18

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Wed 8/26

7:45 am-3:01 pm

3 stops36h 16m

$751

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Mon 9/7

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Sun 9/13

2:20 pm-7:20 pm

1 stop10h 00m

$811

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Fri 9/18

2:20 pm-7:20 pm

1 stop10h 00m

$811

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Sat 9/5

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Sat 9/19

2:20 pm-10:15 pm

1 stop12h 55m

$811

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Mon 11/16

5:15 pm-10:20 am

2 stops36h 05m

Manchester

Thu 11/19

6:10 am-8:33 pm

2 stops19h 23m

$812

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Wed 11/4

8:30 pm-12:15 pm

2 stops34h 45m

Manchester

Wed 11/18

12:55 pm-5:15 pm

2 stops33h 20m

$828

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Mon 7/27

4:00 pm-10:40 pm

2 stops25h 40m

Birmingham

Wed 8/12

12:20 pm-7:25 pm

1 stop12h 05m

$832

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

Sun 8/23

1:23 pm-10:15 am

2 stops15h 52m

Inverness

Tue 9/1

7:20 am-8:56 pm

2 stops18h 36m

$863

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Tue 9/8

1:20 pm-4:40 pm

1 stop22h 20m

Birmingham

Tue 9/15

5:35 pm-11:35 am

1 stop23h 00m

$873

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 11/1

5:45 pm-7:35 pm

1 stop20h 50m

London City

Fri 11/6

10:00 am-3:55 pm

1 stop10h 55m

$882

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $416). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,299). 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 June 10, 2026.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to United Kingdom in the morning. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

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 June 10, 2026.

The most flights from IAD to GB0 are scheduled on a Monday (28 on average). You will have fewer flight options on Sunday, 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 19% of weekly flights between Washington, D.C. and United Kingdom have experienced delays in the past year, with the average delay time being 171 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?

Monday tends to have the lowest number of delays on this route, whereas Friday 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, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.

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

Booking 72 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 June 10, 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
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,808 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Aer Lingus
7.3
Good
1,602 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
672 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,035 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.5

Food

6.9

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 United Airlines, Icelandair, and American 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 24h 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 $201 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $214 and British Airways from $293 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 (82%), Finnair (82%), Iberia( 82%).

  • 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 $364. On average you can expect to pay $2,353. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $610.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $416). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,299). 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.
Dulles Intl to Heathrow flights
Baltimore to Heathrow flights
Dulles Intl to Charles de Gaulle flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Madrid flights
Dulles Intl to Istanbul flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to Athens flights
Dulles Intl to Stansted flights
Dulles Intl to Lisbon flights
Dulles Intl to Dublin flights
Dulles Intl to Frankfurt flights
Baltimore to Gatwick flights
Dulles Intl to Barcelona-El Prat flights
Baltimore to Charles de Gaulle flights
Reagan-National to Charles de Gaulle flights
Dulles Intl to Orly flights
Dulles Intl to Amsterdam flights
Dulles Intl to Edinburgh flights
Baltimore to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Keflavik Intl flights
Baltimore to Athens flights
Reagan-National to Madrid flights
Dulles Intl to Zurich flights
Baltimore to Madrid flights
Dulles Intl to Luton flights
Dulles Intl to Vicenza flights
Dulles Intl to Munich flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Baltimore to Frankfurt flights
Baltimore to Dublin flights
Baltimore to Istanbul flights
Baltimore to Lisbon flights
Dulles Intl to Copenhagen flights
Reagan-National to Lisbon flights
Baltimore to Keflavik Intl flights
Dulles Intl to Bruxelles-National flights
Reagan-National to Keflavik Intl flights
Baltimore to Barcelona-El Prat flights
Dulles Intl to Vienna 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 June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Brussels AirlinesCheapest$298Average$670FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$309Average$507FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$487Average$672FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$492Average$787FlexibilityNo cancel feeOn-time77%
DeltaCheapest$519Average$861FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$520Average$830FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$536Average$886FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$541Average$819FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$554Average$949FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$557Average$958FlexibilityNo cancel feeOn-time69%

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