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$227+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$501
(FlightHub)

One-way from

$258
(Flightnetwork)

Popular in

June

Cheapest in

January

Average price

$663

Good round-trip deal

$676 or less

Good one-way deal

$439 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
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From Washington, D.C. Dulles Intl to United Kingdom
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One-way flight from Washington, D.C. Dulles Intl to United Kingdom
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Highest demand for flights based on searches. 15% potential increase in price ($139 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to United Kingdom.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to United Kingdom.
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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 February 20, 2025.

This FlightHub deal was found by Cheapflights users on 2/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/288:30 pmIAD - GLA
1 stop11h 55mIcelandair
Mon 5/52:20 pmGLA - IAD
1 stop10h 00mIcelandair
Deal found 2/19$501
This oojo deal was found by Cheapflights users on 2/19. 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 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 stop12h 00mBritish Airways
Deal found 2/19$502
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Tue 4/85:20 pmIAD - GLA
1 stop9h 45mAer Lingus
Wed 4/238:35 amGLA - IAD
1 stop12h 15mAer Lingus
Deal found 2/19$533
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/212:12 pmIAD - INV
2 stops19h 48mAmerican Airlines
Mon 5/123:45 pmINV - IAD
2 stops30h 11mAmerican Airlines
Deal found 2/19$536
This Gotogate deal was found by Cheapflights users on 2/18. 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.
Fri 5/28:30 pmIAD - LGW
1 stop10h 15mIcelandair
Fri 5/93:40 pmLGW - IAD
1 stop32h 40mIcelandair
Deal found 2/18$549
This Mytrip deal was found by Cheapflights users on 2/18. 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 3/198:40 pmIAD - STN
2 stops21h 35mMultiple Airlines
Wed 3/263:15 pmSTN - IAD
2 stops32h 10mMultiple Airlines
Deal found 2/18$550
This KLM deal was found by Cheapflights users on 2/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/296:35 pmIAD - INV
1 stop10h 50mKLM
Sat 4/55:25 pmINV - IAD
1 stop27h 10mKLM
Deal found 2/19$555
This FlightHub deal was found by Cheapflights users on 2/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:15 pmIAD - LHR
1 stop31h 40mIcelandair
Sat 10/119:25 pmLHR - IAD
1 stop29h 45mIcelandair
Deal found 2/20$556
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/209:45 pmIAD - LHR
1 stop33h 30mMultiple Airlines
Sun 3/236:00 amLHR - IAD
1 stop13h 35mMultiple Airlines
Deal found 2/20$558
This oojo deal was found by Cheapflights users on 2/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/35:10 pmIAD - LHR
1 stop11h 10mScandinavian Airlines
Wed 3/125:00 pmLHR - IAD
1 stop27h 40mScandinavian Airlines
Deal found 2/19$559
This Gotogate deal was found by Cheapflights users on 2/18. 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 3/116:30 pmIAD - LGW
1 stop11h 20mTAP AIR PORTUGAL
Tue 3/189:20 pmLGW - IAD
2 stops28h 40mTAP AIR PORTUGAL
Deal found 2/18$561
This oojo deal was found by Cheapflights users on 2/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/247:15 pmIAD - LHR
1 stop22h 25mTAP AIR PORTUGAL
Mon 3/36:30 pmLHR - IAD
1 stop25h 00mTAP AIR PORTUGAL
Deal found 2/20$567

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 February 20, 2025.

Fly from

Dulles Intl

Fly to

United Kingdom

Route

Depart

Return

Price

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Mon 4/28

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Mon 5/5

2:20 pm-7:20 pm

1 stop10h 00m

$501

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

$502

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Tue 4/8

5:20 pm-8:05 am

1 stop9h 45m

Glasgow Intl

Wed 4/23

8:35 am-3:50 pm

1 stop12h 15m

$533

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

Mon 4/21

2:12 pm-3:00 pm

2 stops19h 48m

Inverness

Mon 5/12

3:45 pm-4:56 pm

2 stops30h 11m

$536

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 5/2

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Fri 5/9

3:40 pm-7:20 pm

1 stop32h 40m

$549

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 3/19

8:40 pm-10:15 pm

2 stops21h 35m

London Stansted

Wed 3/26

3:15 pm-7:25 pm

2 stops32h 10m

$550

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

Sat 3/29

6:35 pm-9:25 am

1 stop10h 50m

Inverness

Sat 4/5

5:25 pm-3:35 pm

1 stop27h 10m

$555

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 4/30

8:30 pm-8:20 pm

1 stop18h 50m

London Heathrow

Wed 5/7

1:05 pm-7:20 pm

1 stop11h 15m

$557

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 3/20

9:45 pm-11:15 am

1 stop33h 30m

London Heathrow

Sun 3/23

6:00 am-3:35 pm

1 stop13h 35m

$558

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 3/3

5:10 pm-9:20 am

1 stop11h 10m

London Heathrow

Wed 3/12

5:00 pm-4:40 pm

1 stop27h 40m

$559

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 60 results
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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.

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 $1,136). 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 February 20, 2025.

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 February 20, 2025.

The most flights from IAD to GB0 are scheduled on a Thursday (23 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 February 20, 2025.
See what other customers who have flown with Delta, Porter Airlines and KLM from Washington, D.C. to United Kingdom have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines
7.9
Good
276 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,274 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $258 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $287 and Scandinavian Airlines from $362 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 City 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: Air France (93%), KLM (91%), Delta( 91%).

  • 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 $379. On average you can expect to pay $1,410. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $498.

  • 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, 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 $1,136). 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.

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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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Baltimore to Leonardo da Vinci/Fiumicino flights
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Baltimore to Dublin flights
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Reagan-National to Frankfurt 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$354Average$855FlexibilityNo cancel feeOn-time75%
PLAYCheapest$366Average$505FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$370Average$660FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$398Average$686FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$474Average$711FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$494Average$842FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$533Average$841FlexibilityNo cancel feeOn-time72%
FinnairCheapest$551Average$740FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$558Average$745FlexibilityNo cancel feeOn-time71%
SWISSCheapest$572Average$795FlexibilityNo cancel feeOn-time79%
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