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$193+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
abr. 20 — abr. 271
dom. 4/20
dom. 4/27
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 abril 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$519
(British Airways)

One-way from

$193
(oojo)

Popular in

June

Cheapest in

January

Average price

$712

Good round-trip deal

$700 or less

Good one-way deal

$468 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. 13% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 15, 2025.

This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/2210:40 pmIAD - INV
1 stop11h 15mBritish Airways
mar. 8/53:45 pmINV - IAD
1 stop29h 10mBritish Airways
Deal found 4/14$498
This oojo deal was found by Cheapflights users on 4/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/168:30 pmIAD - LHR
1 stop10h 25mIcelandair
sáb. 10/259:25 pmLHR - IAD
1 stop26h 50mIcelandair
Deal found 4/15$514
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/17:25 pmIAD - INV
1 stop19h 45mAmerican Airlines
vie. 8/810:25 amINV - IAD
1 stop14h 45mAmerican Airlines
Deal found 4/14$516
This Gotogate deal was found by Cheapflights users on 4/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/38:30 pmIAD - LGW
1 stop10h 15mIcelandair
mar. 5/133:40 pmLGW - IAD
1 stop32h 40mIcelandair
Deal found 4/15$522
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/118:30 pmIAD - GLA
1 stop11h 55mIcelandair
vie. 9/192:20 pmGLA - IAD
1 stop12h 50mIcelandair
Deal found 4/14$548
This KLM deal was found by Cheapflights users on 4/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/155:25 pmIAD - INV
1 stop14h 25mKLM
mié. 4/231:25 pmINV - IAD
1 stop31h 10mKLM
Deal found 4/14$569
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/1512:11 pmIAD - INV
2 stops19h 39mDelta
mié. 4/236:25 amINV - IAD
1 stop14h 10mDelta
Deal found 4/14$574
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/295:55 pmIAD - INV
1 stop11h 20mMultiple Airlines
dom. 9/78:55 pmINV - IAD
1 stop25h 40mMultiple Airlines
Deal found 4/14$578
This oojo deal was found by Cheapflights users on 4/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/3010:40 pmIAD - GLA
1 stop13h 05mBritish Airways
lun. 7/148:50 pmGLA - IAD
1 stop28h 20mBritish Airways
Deal found 4/15$580
This Iberia deal was found by Cheapflights users on 4/15. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/2810:40 pmIAD - LHR
Nonstop7h 25mIberia
mar. 5/612:45 pmLHR - IAD
Nonstop8h 00mIberia
Deal found 4/15$584
This lastminute.com deal was found by Cheapflights users on 4/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/277:46 pmIAD - LHR
1 stop12h 44mVirgin Atlantic
mar. 5/68:40 amLHR - IAD
1 stop11h 55mVirgin Atlantic
Deal found 4/15$593
This Virgin Atlantic deal was found by Cheapflights users on 4/14. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/236:10 amIAD - LGW
2 stops22h 50mVirgin Atlantic
mié. 8/2012:00 pmLGW - IAD
1 stop12h 37mVirgin Atlantic
Deal found 4/14$597

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 abril 15, 2025.
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

Dulles Intl

Fly to

United Kingdom

Route

Depart

Return

Price

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

mar. 5/27

10:40 pm-2:55 pm

1 stop11h 15m

Inverness

mar. 6/3

11:20 am-8:10 pm

1 stop13h 50m

$519

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sáb. 5/3

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

mar. 5/13

3:40 pm-7:20 pm

1 stop32h 40m

$522

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

sáb. 5/3

8:30 pm-8:20 pm

1 stop18h 50m

London Heathrow

mar. 5/13

9:25 pm-7:20 pm

1 stop26h 55m

$530

Washington, D.C.Inverness

IAD - INV

IADINV

Washington, D.C. Dulles Intl

vie. 4/25

10:40 pm-8:10 pm

1 stop16h 30m

Inverness

dom. 5/4

11:20 am-8:10 pm

1 stop13h 50m

$550

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

lun. 6/16

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

mié. 6/25

2:20 pm-10:10 pm

1 stop12h 50m

$551

Washington, D.C.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

lun. 6/30

10:40 pm-4:45 pm

1 stop13h 05m

Glasgow Intl

lun. 7/14

8:50 pm-8:10 pm

1 stop28h 20m

$580

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

lun. 5/5

10:20 pm-3:35 pm

1 stop12h 15m

London Gatwick

mié. 5/7

4:25 pm-3:20 pm

1 stop27h 55m

$598

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

lun. 5/12

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

mié. 5/21

10:00 am-2:53 pm

1 stop33h 53m

$600

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mié. 4/30

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

mié. 5/7

8:40 am-4:15 pm

1 stop12h 35m

$601

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

mar. 5/6

8:45 pm-5:50 pm

1 stop16h 05m

London Gatwick

mar. 5/13

6:35 pm-4:15 pm

1 stop26h 40m

$605

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

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.

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, 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 $1,110). 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 abril 15, 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 abril 15, 2025.

The most flights from IAD to GB0 are scheduled on a Monday (25 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 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 abril 15, 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
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
8.0
Very good
281 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
1,323 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
1,269 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
775 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.9

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 $193 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $243 and Virgin Atlantic from $364 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: Delta (94%), Singapore Airlines (92%), Virgin Atlantic( 92%).

  • 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 $399. On average you can expect to pay $2,453. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $483.

  • 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 $1,110). 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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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 abril 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$518FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$370Average$688FlexibilityNo cancel feeOn-time77%
KLMCheapest$445Average$883FlexibilityNo cancel feeOn-time75%
IcelandairCheapest$475Average$700FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$486Average$759FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$507Average$839FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$533Average$811FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$549Average$803FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$558Average$787FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$570Average$805FlexibilityNo cancel feeOn-time70%

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