HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
United Kingdom

$253+ 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to United Kingdom with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to United Kingdom

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to United Kingdom (GB0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$477
(Mytrip)

One-way from

$253
(Flightnetwork)

Good round-trip deal

$689 or less

Good one-way deal

$440 or less
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
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

Find 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 January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/20. 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 3/108:40 pmIAD - GLA
1 stop9h 15mIcelandair
Wed 3/1912:35 pmGLA - IAD
1 stop10h 50mIcelandair
Deal found 1/20$475
This Mytrip deal was found by Cheapflights users on 1/21. 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 1/227:40 pmIAD - GLA
2 stops15h 20mMultiple Airlines
Wed 1/297:25 amGLA - IAD
2 stops16h 00mMultiple Airlines
Deal found 1/21$496
This oojo deal was found by Cheapflights users on 1/21. 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.
Tue 4/1510:40 pmIAD - INV
1 stop11h 15mBritish Airways
Wed 4/2310:30 amINV - IAD
1 stop14h 40mBritish Airways
Deal found 1/21$499
This oojo deal was found by Cheapflights users on 1/21. 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 1/307:40 pmIAD - MAN
1 stop10h 05mIcelandair
Wed 2/511:55 amMAN - IAD
1 stop11h 30mIcelandair
Deal found 1/21$503
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 1/275:10 pmIAD - STN
1 stop9h 40mMultiple Airlines
Tue 2/48:30 amSTN - IAD
1 stop12h 10mMultiple Airlines
Deal found 1/20$522
This Icelandair deal was found by Cheapflights users on 1/20. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/238:40 pmIAD - LGW
1 stop10h 15mIcelandair
Sat 4/263:40 pmLGW - IAD
1 stop32h 40mIcelandair
Deal found 1/20$525
This Icelandair deal was found by Cheapflights users on 1/21. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/158:30 pmIAD - LHR
1 stop10h 25mIcelandair
Mon 5/191:05 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 1/21$525
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 3/49:15 pmIAD - MAN
1 stop12h 20mMultiple Airlines
Tue 3/116:00 amMAN - IAD
1 stop14h 40mMultiple Airlines
Deal found 1/21$526
This oojo deal was found by Cheapflights users on 1/21. 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.
Sun 2/2310:30 pmIAD - LHR
1 stop19h 10mTAP AIR PORTUGAL
Wed 3/58:15 amLHR - IAD
1 stop17h 45mTAP AIR PORTUGAL
Deal found 1/21$530
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 3/35:10 pmIAD - LGW
1 stop11h 05mMultiple Airlines
Wed 3/1211:15 amLGW - IAD
1 stop13h 30mMultiple Airlines
Deal found 1/19$532
This oojo deal was found by Cheapflights users on 1/21. 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.
Sun 5/1110:20 pmIAD - LGW
1 stop11h 50mTAP AIR PORTUGAL
Thu 5/222:50 pmLGW - IAD
1 stop30h 30mTAP AIR PORTUGAL
Deal found 1/21$535
This Ticket deal was found by Cheapflights users on 1/21. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/25:10 pmIAD - LHR
2 stops16h 25mScandinavian Airlines
Tue 2/117:30 pmLHR - IAD
1 stop25h 10mScandinavian Airlines
Deal found 1/21$536

Find flights from Dulles Intl to United Kingdom within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Mon 3/10

8:40 pm-9:55 am

1 stop9h 15m

Glasgow Intl

Wed 3/19

12:35 pm-7:25 pm

1 stop10h 50m

$475

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

Tue 4/15

10:40 pm-2:55 pm

1 stop11h 15m

Inverness

Wed 4/23

10:30 am-5:30 pm

1 stop12h 00m

$499

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Sun 2/16

7:40 pm-10:45 am

1 stop10h 05m

Manchester

Fri 2/21

11:55 am-6:25 pm

1 stop11h 30m

$505

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 1/31

7:40 pm-7:30 pm

1 stop18h 50m

London Heathrow

Wed 2/12

8:40 pm-6:25 pm

1 stop26h 45m

$524

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 3/23

8:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Mon 4/28

3:40 pm-7:20 pm

1 stop32h 40m

$525

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 2/6

7:40 pm-11:40 pm

2 stops23h 00m

London Stansted

Mon 2/10

3:55 pm-6:25 pm

2 stops31h 30m

$526

Washington, D.C.Manchester

IAD - MAN

IADMAN

Washington, D.C. Dulles Intl

Wed 3/5

5:10 pm-8:25 am

1 stop10h 15m

Manchester

Wed 3/12

6:05 am-4:40 pm

1 stop14h 35m

$528

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/23

10:30 pm-9:35 pm

1 stop18h 05m

London Heathrow

Tue 3/11

6:00 am-3:30 pm

1 stop13h 30m

$530

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 4/23

10:40 pm-11:05 am

Nonstop7h 25m

London Heathrow

Wed 4/30

5:00 pm-8:10 pm

Nonstop8h 10m

$531

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 2/22

5:10 pm-9:20 am

1 stop11h 10m

London Heathrow

Mon 2/24

6:40 am-3:40 pm

1 stop14h 00m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 60 results
1
2
3
...
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.

Travel insights for flights from Dulles Intl to United Kingdom

Get recent, data-driven insights about flights from Dulles Intl to United Kingdom including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to United Kingdom (average of $661). Flying from Washington, D.C. Dulles Intl Airport to United Kingdom in June is currently the most expensive (average of $1,137). 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 January 21, 2025.