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$238+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$598
(oojo)

One-way from

$238
(oojo)

Popular in

June

Cheapest in

January

Average price

$711

Good round-trip deal

$675 or less

Good one-way deal

$474 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 ($113 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 April 29, 2025.

This CrystalTravel deal was found by Cheapflights users on 4/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1511:15 pmIAD - GLA
1 stop9h 10mIcelandair
Tue 8/262:20 pmGLA - IAD
1 stop12h 50mIcelandair
Deal found 4/28$590
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 8/69:20 pmIAD - BHX
1 stop11h 20mDelta
Sun 8/246:00 amBHX - IAD
1 stop18h 15mDelta
Deal found 4/29$605
This oojo deal was found by Cheapflights users on 4/28. 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 8/1010:05 pmIAD - LHR
2 stops18h 30mScandinavian Airlines
Sat 8/235:00 pmLHR - IAD
1 stop31h 59mScandinavian Airlines
Deal found 4/28$617
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 8/63:30 pmIAD - MAN
2 stops18h 55mDelta
Sun 8/241:00 pmMAN - IAD
2 stops28h 00mDelta
Deal found 4/29$618
This oojo deal was found by Cheapflights users on 4/28. 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.
Fri 8/2911:15 pmIAD - LGW
1 stop10h 25mIcelandair
Fri 9/53:40 pmLGW - IAD
1 stop11h 30mIcelandair
Deal found 4/28$619
This Gotogate deal was found by Cheapflights users on 4/29. 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 5/610:20 pmIAD - LGW
1 stop12h 15mTAP AIR PORTUGAL
Wed 5/144:25 pmLGW - IAD
1 stop27h 55mTAP AIR PORTUGAL
Deal found 4/29$620
This oojo deal was found by Cheapflights users on 4/29. 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.
Fri 8/2911:15 pmIAD - LHR
1 stop16h 05mIcelandair
Tue 9/21:05 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 4/29$623
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/110:40 pmIAD - GLA
1 stop13h 00mBritish Airways
Sun 8/3112:05 pmGLA - IAD
1 stop13h 10mBritish Airways
Deal found 4/28$624
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 6/97:04 pmIAD - LGW
1 stop30h 56mMultiple Airlines
Fri 6/2010:00 amLGW - IAD
1 stop16h 12mMultiple Airlines
Deal found 4/29$624
This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 8/53:30 pmIAD - LHR
1 stop10h 45mDelta
Thu 8/1411:30 amLHR - IAD
1 stop12h 45mDelta
Deal found 4/29$624
This Icelandair deal was found by Cheapflights users on 4/29. 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 8/78:30 pmIAD - MAN
1 stop10h 10mIcelandair
Sun 8/171:05 pmMAN - IAD
1 stop14h 05mIcelandair
Deal found 4/29$624
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/265:55 pmIAD - LHR
Nonstop7h 20mIberia
Wed 9/36:15 amLHR - IAD
1 stop13h 45mIberia
Deal found 4/29$627

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 April 29, 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.Glasgow

IAD - GLA

IADGLA

Washington, D.C. Dulles Intl

Tue 5/13

8:30 pm-1:25 pm

1 stop11h 55m

Glasgow Intl

Wed 5/21

2:25 pm-10:10 pm

1 stop12h 45m

$598

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Wed 8/6

9:20 pm-1:40 pm

1 stop11h 20m

Birmingham

Sun 8/24

6:00 am-7:15 pm

1 stop18h 15m

$605

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/13

10:40 pm-11:05 am

Nonstop7h 25m

London Heathrow

Thu 5/29

6:15 am-3:00 pm

1 stop13h 45m

$619

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 7/24

11:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Wed 8/13

3:40 pm-10:10 pm

1 stop11h 30m

$619

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 5/6

10:20 pm-3:35 pm

1 stop12h 15m

London Gatwick

Wed 5/14

4:25 pm-3:20 pm

1 stop27h 55m

$620

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/13

3:52 pm-7:15 am

1 stop10h 23m

London Heathrow

Wed 5/21

9:30 am-3:50 pm

1 stop11h 20m

$622

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 5/14

5:50 pm-6:20 am

Nonstop7h 30m

London Heathrow

Tue 9/9

6:15 am-7:15 pm

1 stop18h 00m

$623

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 6/9

7:04 pm-7:00 am

1 stop30h 56m

London Gatwick

Fri 6/20

10:00 am-9:12 pm

1 stop16h 12m

$624

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Wed 10/1

11:15 pm-9:10 pm

1 stop16h 55m

Birmingham

Mon 10/6

8:45 am-7:20 pm

1 stop15h 35m

$631

Washington, D.C.Birmingham

IAD - BHX

IADBHX

Washington, D.C. Dulles Intl

Tue 5/13

9:45 am-12:15 pm

2 stops21h 30m

Birmingham

Wed 5/21

9:30 am-9:08 pm

2 stops16h 38m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 April 29, 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 April 29, 2025.

The most flights from IAD to GB0 are scheduled on a Monday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (23 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 April 29, 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
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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
285 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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.
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Comfort

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 $238 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $270 and Virgin Atlantic from $377 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: Singapore Airlines (91%), Delta (89%), Virgin Atlantic( 87%).

  • 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 $395. On average you can expect to pay $2,419. The most popular route, (Washington, D.C. Dulles Intl - London Heathrow), can usually be booked for $419.

  • 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.

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
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Baltimore to Charles de Gaulle flights
Reagan-National to Charles de Gaulle flights
Baltimore to Gatwick flights
Reagan-National to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Dublin flights
Dulles Intl to Frankfurt flights
Reagan-National to Istanbul flights
Baltimore to Leonardo da Vinci/Fiumicino flights
Reagan-National to Orly flights
Dulles Intl to Amsterdam flights
Reagan-National to Madrid flights
Reagan-National to Athens flights
Dulles Intl to Bruxelles-National flights
Dulles Intl to Edinburgh flights
Baltimore to Istanbul flights
Baltimore to Athens flights
Reagan-National to Lisbon flights
Baltimore to Stansted flights
Baltimore to Madrid flights
Dulles Intl to Zurich flights
Dulles Intl to Keflavik Intl flights
Baltimore to Lisbon flights
Dulles Intl to Vicenza flights
Dulles Intl to Sabiha Gokcen flights
Dulles Intl to Malpensa flights
Baltimore to Dublin flights
Reagan-National to Dublin flights
Dulles Intl to Copenhagen flights
Dulles Intl to Munich flights
Dulles Intl to Linate flights
Baltimore to Keflavik Intl flights
Reagan-National to Barcelona-El Prat flights
Dulles Intl to Vienna flights
Baltimore to Barcelona-El Prat flights
Reagan-National to Malpensa flights
Dulles Intl to Stansted 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$370Average$687FlexibilityNo cancel feeOn-time77%
PLAYCheapest$384Average$514FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$445Average$878FlexibilityNo cancel feeOn-time75%
IcelandairCheapest$474Average$695FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$486Average$759FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$533Average$808FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$535Average$846FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$549Average$800FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$558Average$789FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$571Average$800FlexibilityNo cancel feeOn-time70%

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