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Cheap flights from the United Kingdom to Washington, D.C. Dulles Intl Airport from £243

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
2 Apr — 9 Apr1
1 adult

Cheap flight deals from United Kingdom to Dulles Intl

Keep the following information in mind while searching for United Kingdom to Dulles Intl flight deals. Data was last updated 28 March 2025.

Round-trip from

£435

One-way from

£243

Popular in

July

Cheapest in

February

Average price

£525

Good round-trip deal

£541 or less

Good one-way deal

£631 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 6/9-20/9
  • 2 total stops
  • 33h 44m total
  • United Kingdom to Washington, D.C.
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29/4
  • 29/4
  • 2 total stops
  • 48h 41m total
  • United Kingdom to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£62 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from United Kingdom to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from United Kingdom to Washington, D.C. Dulles Intl.
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Find flight deals from United Kingdom to Dulles Intl

Cheapest flights from United Kingdom to Dulles Intl
Explore the most affordable flight options available from United Kingdom to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.

Fri 2/515:40LGW - IAD
1 stop32h 40mIcelandair
Sun 11/520:30IAD - LGW
1 stop13h 10mIcelandair
Deal found 28/3£435
Thu 1/516:40LHR - IAD
Nonstop8h 10mLufthansa
Sat 3/522:24IAD - LHR
1 stop17h 16mLufthansa
Deal found 27/3£436
Thu 8/506:15STN - IAD
2 stops18h 44mMultiple Airlines
Sat 17/522:05IAD - STN
2 stops21h 15mMultiple Airlines
Deal found 27/3£436
Sun 11/510:35LHR - IAD
2 stops14h 24mScandinavian Airlines
Sun 18/522:05IAD - LHR
1 stop15h 25mScandinavian Airlines
Deal found 26/3£438
Wed 21/508:50LGW - IAD
2 stops15h 30mMultiple Airlines
Mon 26/520:30IAD - LGW
2 stops17h 50mMultiple Airlines
Deal found 28/3£445
Sat 26/413:05LHR - IAD
1 stop30h 45mAustrian Airlines
Sun 27/418:30IAD - LHR
Nonstop7h 25mAustrian Airlines
Deal found 27/3£448
Sat 26/413:05LHR - IAD
1 stop30h 45mBrussels Airlines
Sun 27/417:30IAD - LHR
1 stop13h 50mBrussels Airlines
Deal found 28/3£450
Fri 25/411:30LTN - IAD
1 stop12h 25mMultiple Airlines
Fri 2/517:20IAD - LTN
1 stop15h 15mMultiple Airlines
Deal found 28/3£465
Fri 25/421:25LHR - IAD
1 stop26h 55mIcelandair
Fri 2/520:30IAD - LHR
1 stop18h 50mIcelandair
Deal found 28/3£465
Mon 12/519:10BHX - IAD
1 stop29h 49mScandinavian Airlines
Tue 27/522:05IAD - BHX
1 stop15h 30mScandinavian Airlines
Deal found 27/3£468
Sun 11/508:40BHX - IAD
1 stop12h 10mMultiple Airlines
Sun 18/517:20IAD - BHX
1 stop9h 20mMultiple Airlines
Deal found 27/3£477
Mon 12/508:15NCL - IAD
1 stop15h 40mMultiple Airlines
Mon 19/517:20IAD - NCL
1 stop19h 05mMultiple Airlines
Deal found 28/3£479

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom to Dulles Intl 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 858,174 searches. Data last updated 28 March 2025.
Use the filters below to find and compare flights from the United Kingdom to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

United Kingdom

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 2/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 11/5

20:30-14:40

1 stop13h 10m

£435

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 1/5

16:40-19:50

Nonstop8h 10m

Washington, D.C. Dulles Intl

Sat 3/5

22:24-20:40

1 stop17h 16m

£436

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 8/5

06:15-19:59

2 stops18h 44m

Washington, D.C. Dulles Intl

Sat 17/5

22:05-00:20

2 stops21h 15m

£436

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 11/5

10:35-19:59

2 stops14h 24m

Washington, D.C. Dulles Intl

Sun 18/5

22:05-18:30

1 stop15h 25m

£438

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 21/5

08:50-19:20

2 stops15h 30m

Washington, D.C. Dulles Intl

Mon 26/5

20:30-19:20

2 stops17h 50m

£445

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 26/4

13:05-14:50

1 stop30h 45m

Washington, D.C. Dulles Intl

Sun 27/4

18:30-06:55

Nonstop7h 25m

£448

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 26/4

13:05-14:50

1 stop30h 45m

Washington, D.C. Dulles Intl

Sun 27/4

17:30-12:20

1 stop13h 50m

£450

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Fri 25/4

11:30-18:55

1 stop12h 25m

Washington, D.C. Dulles Intl

Fri 2/5

17:20-13:35

1 stop15h 15m

£465

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 25/4

21:25-19:20

1 stop26h 55m

Washington, D.C. Dulles Intl

Fri 2/5

20:30-20:20

1 stop18h 50m

£465

BirminghamWashington, D.C.

BHX - IAD

BHXIAD

Birmingham

Mon 12/5

19:10-19:59

1 stop29h 49m

Washington, D.C. Dulles Intl

Tue 27/5

22:05-18:35

1 stop15h 30m

£468

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to Washington, D.C. Dulles Intl Airport

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. Dulles Intl Airport (average of £599). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 GB to IAD?

Find hourly flight availability from United Kingdom to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 March 2025.

When flying from United Kingdom to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 28 March 2025.
Get a feel of what it's like to fly with Delta, KLM and Air Transat from United Kingdom to Washington, D.C. by reading reviews from past customers. 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
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,896 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Dulles Intl. 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 United Kingdom to Washington, D.C. Dulles Intl Airport one-way?

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as £324. Users have also found prices from £326 and £395 on Air Transat and WestJet, respectively.

  • What are the most popular routes from United Kingdom to Washington, D.C. Dulles Intl Airport?

    The most popular flight routes from United Kingdom to Washington, D.C. Dulles Intl Airport are London Heathrow - Washington, D.C. Dulles Intl, London Gatwick - Washington, D.C. Dulles Intl and London City - Washington, D.C. Dulles Intl.

  • What are the most reliable airlines from United Kingdom to Washington, D.C. Dulles Intl Airport?

    Before booking your flight to Washington, D.C. Dulles Intl Airport from United Kingdom, check out the most reliable airlines to get you to your destination on time: KLM (90%), Air France (90%), Delta( 90%).

  • What are the cheapest flights from United Kingdom to Washington, D.C. Dulles Intl Airport?

    While on average a flight from United Kingdom to Washington, D.C. Dulles Intl Airport is generally £1,179, our data shows the cheapest flight currently is £478. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £412 for that flight.

  • Can I find deals for flights from United Kingdom to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Dulles Intl.

  • Can I find deals for business class flights from United Kingdom to Dulles Intl?

    Yes. Cheapflights offers flight deals from United Kingdom to Dulles Intl 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 United Kingdom to Washington, D.C. Dulles Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Washington, D.C. Dulles Intl Airport (average of £599). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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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Book flights to the United Kingdom if you plan to visit one of these locations
Silver Spring
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Alternative routes for United Kingdom to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
London City to Dulles Intl flights
Gatwick to Baltimore flights
Gatwick to Reagan-National flights
Stansted to Baltimore flights
London City to Reagan-National flights
Edinburgh to Dulles Intl flights
Stansted to Dulles Intl flights
London City to Baltimore flights
Manchester to Dulles Intl flights
Luton to Baltimore flights
Luton to Dulles Intl flights
Manchester to Baltimore flights
Manchester to Reagan-National flights
Edinburgh to Baltimore flights
Edinburgh to Reagan-National flights
Glasgow Intl to Dulles Intl flights
Birmingham to Dulles Intl flights
Glasgow Intl to Baltimore flights
Glasgow Intl to Reagan-National flights
Newcastle upon Tyne to Dulles Intl flights
Newcastle upon Tyne to Baltimore flights
Bruxelles-National to Dulles Intl flights
Birmingham to Baltimore flights
Newcastle upon Tyne to Reagan-National flights
Bristol to Dulles Intl flights
Istanbul to Dulles Intl flights
Southampton to Reagan-National flights
Bristol to Baltimore flights
Southampton to Baltimore flights
Birmingham to Reagan-National flights
Cardiff to Baltimore flights
Liverpool to Baltimore flights
Leeds to Dulles Intl flights
Aberdeen to Reagan-National flights
Aberdeen to Baltimore flights
Inverness to Dulles Intl flights
Frankfurt to Dulles Intl flights
Cardiff to Dulles Intl flights
Bristol to Reagan-National flights
Cardiff to Reagan-National flights
Southampton to Dulles Intl flights
Aberdeen to Dulles Intl flights

Top 10 airlines flying from United Kingdom to Dulles Intl

Discover the top 10 airlines that operate flights from United Kingdom to Dulles Intl. 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 858,174 searches. Data last updated 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£274Average£479FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£331Average£790FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£360Average£557FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£364Average£608FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£396Average£742FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Aer LingusCheapest£436Average£658FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£445Average£593FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air FranceCheapest£456Average£770FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£469Average£664FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£469Average£668FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Dulles Intl?

When you search for this flight from United Kingdom to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Dulles Intl?

Cheapflights helps you find that perfect flight to Dulles Intl from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from United Kingdom to Dulles Intl with no change fees?

Yes, we can. To see specific flights from United Kingdom to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from United Kingdom to Dulles Intl become cheaper?

Yes! Start tracking prices for United Kingdom to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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