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Cheap flights from the United Kingdom to Washington, D.C. Dulles Intl Airport from £264

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
20 Jul — 27 Jul1
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 15 July 2025.

Round-trip from

£391

One-way from

£264

Popular in

August

Cheapest in

February

Average price

£660

Good round-trip deal

£530 or less

Good one-way deal

£613 or less
28/8-4/9
  • 28/8-4/9
  • 4 total stops
  • 36h 04m total
  • United Kingdom to Washington, D.C.
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23/9
  • 23/9
  • 2 total stops
  • 46h 18m total
  • United Kingdom to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£42 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from United Kingdom to Washington, D.C. Dulles Intl.
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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 15 July 2025.

Thu 28/808:10GLA - IAD
2 stops16h 49mMultiple Airlines
Thu 4/922:05IAD - GLA
2 stops19h 15mMultiple Airlines
Deal found 14/7£391
Wed 27/807:20NCL - IAD
2 stops17h 39mMultiple Airlines
Wed 3/922:05IAD - NCL
2 stops19h 35mMultiple Airlines
Deal found 13/7£394
Sun 23/1109:05LGW - IAD
2 stops58h 30mTAP AIR PORTUGAL
Mon 1/1217:30IAD - LGW
1 stop11h 20mTAP AIR PORTUGAL
Deal found 14/7£471
Thu 9/1006:00LHR - IAD
2 stops15h 10mMultiple Airlines
Sat 18/1010:20IAD - LHR
2 stops15h 10mMultiple Airlines
Deal found 14/7£474
Mon 11/815:40LGW - IAD
1 stop11h 30mIcelandair
Sun 7/923:15IAD - LGW
1 stop31h 30mIcelandair
Deal found 14/7£475
Mon 29/920:25MAN - IAD
2 stops28h 34mScandinavian Airlines
Fri 3/1022:05IAD - MAN
1 stop14h 10mScandinavian Airlines
Deal found 14/7£479
Wed 27/806:40LHR - IAD
2 stops42h 19mScandinavian Airlines
Wed 3/922:05IAD - LHR
1 stop18h 35mScandinavian Airlines
Deal found 13/7£480
Fri 5/911:30LTN - IAD
1 stop12h 25mMultiple Airlines
Sat 13/917:20IAD - LTN
1 stop11h 10mMultiple Airlines
Deal found 14/7£480
Mon 24/1113:30LCY - IAD
1 stop32h 00mSWISS
Sat 6/1220:45IAD - LCY
1 stop10h 55mSWISS
Deal found 13/7£480
Wed 27/810:00LGW - IAD
2 stops16h 39mMultiple Airlines
Wed 3/920:30IAD - LGW
1 stop10h 15mMultiple Airlines
Deal found 12/7£481
Tue 12/821:25LHR - IAD
1 stop29h 45mIcelandair
Tue 30/920:30IAD - LHR
1 stop18h 50mIcelandair
Deal found 13/7£481
Thu 18/910:00LCY - IAD
1 stop10h 35mVirgin Atlantic
Fri 26/917:25IAD - LCY
1 stop13h 15mVirgin Atlantic
Deal found 13/7£483

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 15 July 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

GlasgowWashington, D.C.

GLA - IAD

GLAIAD

Glasgow Intl

Thu 28/8

08:10-19:59

2 stops16h 49m

Washington, D.C. Dulles Intl

Thu 4/9

22:05-22:20

2 stops19h 15m

£391

Newcastle upon TyneWashington, D.C.

NCL - IAD

NCLIAD

Newcastle upon Tyne

Wed 27/8

07:20-19:59

2 stops17h 39m

Washington, D.C. Dulles Intl

Wed 3/9

22:05-22:40

2 stops19h 35m

£394

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 23/11

09:05-14:35

2 stops58h 30m

Washington, D.C. Dulles Intl

Mon 1/12

17:30-09:50

1 stop11h 20m

£471

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 9/10

06:00-16:10

2 stops15h 10m

Washington, D.C. Dulles Intl

Sat 18/10

10:20-06:30

2 stops15h 10m

£474

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 11/8

15:40-22:10

1 stop11h 30m

Washington, D.C. Dulles Intl

Sun 7/9

23:15-11:45

1 stop31h 30m

£475

ManchesterWashington, D.C.

MAN - IAD

MANIAD

Manchester

Mon 29/9

20:25-19:59

2 stops28h 34m

Washington, D.C. Dulles Intl

Fri 3/10

22:05-17:15

1 stop14h 10m

£479

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 3/1

13:25-20:59

1 stop12h 34m

Washington, D.C. Dulles Intl

Thu 12/3

17:20-08:25

1 stop11h 05m

£480

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Mon 24/11

13:30-16:30

1 stop32h 00m

Washington, D.C. Dulles Intl

Sat 6/12

20:45-12:40

1 stop10h 55m

£480

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 28/8

21:05-19:59

2 stops27h 54m

Washington, D.C. Dulles Intl

Thu 4/9

22:05-16:00

1 stop12h 55m

£481

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 12/8

21:25-22:10

1 stop29h 45m

Washington, D.C. Dulles Intl

Tue 30/9

20:30-20:20

1 stop18h 50m

£481

Flights are sorted by cheapest return flights first.

Deals found on 13/7

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 15 July 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.

Weekly flight availability from United Kingdom to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from United Kingdom to Dulles Intl. 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 15 July 2025.

The most flights from GB0 to IAD are scheduled on a Wednesday (28 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 on average).

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 15 July 2025.
Read through reviews of airlines operating flights from the United Kingdom to Washington, D.C. Dulles Intl Airport, such as Delta, KLM, andFinnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,956 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,466 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,657 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 £399. Users have also found prices from £414 and £414 on Aer Lingus and Icelandair, 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: Air Canada (76%), Austrian Airlines (76%), Copa Airlines( 76%).

  • 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 £1,898, our data shows the cheapest flight currently is £426. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £339 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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
College Park
Laurel
Tysons

Browse thousands of different options on Cheapflights for your next trip

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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
Gatwick to Dulles Intl flights
Gatwick to Baltimore flights
London City to Dulles Intl flights
Heathrow to Reagan-National flights
Gatwick to Reagan-National flights
Stansted to Dulles Intl flights
Luton to Baltimore flights
London City to Baltimore flights
Luton to Dulles Intl flights
Stansted to Baltimore flights
London City to Reagan-National flights
Manchester to Dulles Intl flights
Edinburgh to Dulles Intl flights
Manchester to Baltimore flights
Manchester to Reagan-National flights
Birmingham to Dulles Intl flights
Edinburgh to Baltimore flights
Glasgow Intl to Dulles Intl flights
Southend to Dulles Intl flights
Birmingham to Baltimore flights
Birmingham to Reagan-National flights
Newcastle upon Tyne to Dulles Intl flights
Edinburgh to Reagan-National flights
Leeds to Dulles Intl flights
Glasgow Intl to Reagan-National flights
Glasgow Intl to Baltimore flights
Bristol to Dulles Intl flights
Southampton to Dulles Intl flights
Newcastle upon Tyne to Reagan-National flights
Newcastle upon Tyne to Baltimore flights
Istanbul to Dulles Intl flights
Leeds to Baltimore flights
Frankfurt to Dulles Intl flights
Liverpool to Baltimore flights
Amsterdam to Dulles Intl flights
Belfast City to Reagan-National flights
Belfast City to Dulles Intl flights
Belfast Intl to Dulles Intl flights
Aberdeen to Dulles Intl flights
Grimsby to Dulles Intl flights
Grimsby to Reagan-National 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 15 July 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£188Average£535FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£248Average£416FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
IcelandairCheapest£346Average£545FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£367Average£550FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£420Average£572FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£426Average£644FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£437Average£635FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air FranceCheapest£439Average£673FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£444Average£693FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£446Average£757FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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