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Cheap flights from the United Kingdom to Washington, D.C. Dulles Intl Airport from £228

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
9 Aug — 16 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Dulles Intl

Enter your travel dates to find the best prices.

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 10 July 2026.

Thu 19/1111:20
EDI
-
IAD
1 stop12h 10m
Icelandair
Sat 5/1219:40
IAD
-
EDI
1 stop9h 40m
Icelandair
Deal found 6/7£436
Fri 23/1015:40
LGW
-
IAD
1 stop32h 40m
Icelandair
Sat 31/1020:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/7£437
Sat 31/1011:55
LGW
-
IAD
1 stop11h 35m
Icelandair
Sat 7/1119:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 6/7£439
Thu 17/911:20
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Sun 27/917:40
IAD
-
LHR
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 7/7£440
Sat 29/812:30
EDI
-
IAD
Nonstop8h 05m
United Airlines
Sat 29/822:19
IAD
-
EDI
1 stop28h 01m
United Airlines
Deal found 6/7£441
Fri 13/1111:55
LGW
-
IAD
1 stop11h 35m
Icelandair
Tue 17/1119:40
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 10/7£441
Thu 3/911:20
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Thu 17/922:35
IAD
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 6/7£442
Tue 29/910:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Sat 10/1017:05
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 9/7£442
Fri 4/906:00
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Mon 14/917:40
IAD
-
LHR
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 9/7£442
Wed 2/910:35
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Tue 8/917:05
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 8/7£442
Wed 26/806:30
STN
-
IAD
3 stops37h 54m
Multiple Airlines
Sun 30/820:30
IAD
-
STN
2 stops21h 55m
Multiple Airlines
Deal found 10/7£442
Thu 24/905:40
LTN
-
IAD
2 stops19h 55m
Multiple Airlines
Mon 28/922:35
IAD
-
LTN
2 stops19h 25m
Multiple Airlines
Deal found 8/7£443

Find 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 10 July 2026.

Round-trip from

£436

One-way from

£228

Popular in

June

Cheapest in

February

Average price

£563

Good round-trip deal

£476 or less

Good one-way deal

£448 or less
Icelandair
  • Icelandair
  • 19/11-5/12
  • 2 total stops
  • 21h 50m total
  • United Kingdom to Washington, D.C.
Search Deals
25/8
  • 25/8
  • 3 total stops
  • 41h 45m total
  • United Kingdom to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
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.
Search Deals

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 10 July 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Wed 26/8

06:15-15:24

3 stops38h 09m

Washington, D.C. Dulles Intl

Sun 30/8

20:30-21:40

2 stops20h 10m

£445

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Thu 27/8

08:00-20:35

2 stops17h 35m

Washington, D.C. Dulles Intl

Mon 31/8

20:30-22:50

2 stops21h 20m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 24/8

08:40-16:45

1 stop13h 05m

Washington, D.C. Dulles Intl

Thu 10/9

18:35-06:55

Nonstop7h 20m

£512

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 1/9

20:05-16:45

1 stop25h 40m

Washington, D.C. Dulles Intl

Wed 9/9

20:20-17:50

1 stop16h 30m

£512

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Thu 29/10

19:05-15:30

1 stop24h 25m

Washington, D.C. Dulles Intl

Mon 9/11

17:25-12:50

1 stop14h 25m

£527
Fastest return journey

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 3/9

17:55-21:05

Nonstop8h 10m

Washington, D.C. Dulles Intl

Wed 9/9

22:55-11:20

Nonstop7h 25m

£533

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 30/9

12:15-15:30

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 15/11

18:20-06:40

Nonstop7h 20m

£539

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 9/10

16:40-20:20

Nonstop8h 40m

Washington, D.C. Dulles Intl

Mon 12/10

22:05-10:40

Nonstop7h 35m

£540

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 31/8

10:25-23:26

2 stops18h 01m

Washington, D.C. Dulles Intl

Mon 14/9

12:25-09:40

2 stops16h 15m

£541

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Sat 29/8

11:00-19:10

1 stop13h 10m

Washington, D.C. Dulles Intl

Sat 5/9

17:15-08:20

1 stop10h 05m

£542

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £322). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of £1,016). 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 10 July 2026.

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 10 July 2026.

The most flights from GB0 to IAD are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

How often are flights from the United Kingdom to Washington, D.C. delayed?

About 18% of weekly flights between United Kingdom and Washington, D.C. have experienced delays in the past year, with the average delay time being 137 minutes.

What is the most punctual flight time for the United Kingdom to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on the United Kingdom to Washington, D.C. flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

How far ahead should I book a flight from United Kingdom to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from United Kingdom to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 10 July 2026.
Read through reviews of airlines operating flights from the United Kingdom to Washington, D.C. Dulles Intl Airport, such as Virgin Atlantic,United Airlines, andAer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
693 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,975 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Aer Lingus
7.3
Good
1,654 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,132 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,107 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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.

  • How long is the flight from United Kingdom to Washington, D.C. Dulles Intl Airport?

    United Airlines, SWISS, and KLM can get you from United Kingdom to Washington, D.C. Dulles Intl Airport in just under 8h 10m. Your travel time can differ by up to 17h 30m. The distance from United Kingdom to Washington, D.C. Dulles Intl Airport is about 3664 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 British Airways. According to our data, you can fly for as low as £345. Users have also found prices from £354 and £370 on Aer Lingus and TAP AIR PORTUGAL, 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 Stansted - 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 (88%), Austrian Airlines (88%), Copa Airlines( 88%).

  • 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 £1,524, our data shows the cheapest flight currently is £373. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £430 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 £322). Flying from United Kingdom to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of £1,016). 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
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria
Sterling

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
Heathrow to Reagan-National flights
Stansted to Dulles Intl flights
London City to Dulles Intl flights
Luton to Dulles Intl flights
Gatwick to Reagan-National flights
Gatwick to Baltimore flights
Edinburgh to Dulles Intl flights
Manchester to Dulles Intl flights
Edinburgh to Reagan-National flights
Edinburgh to Baltimore flights
Glasgow Intl to Dulles Intl flights
Glasgow Intl to Reagan-National flights
Glasgow Intl to Baltimore flights
Manchester to Baltimore flights
London City to Baltimore flights
Manchester to Reagan-National flights
Luton to Baltimore flights
Birmingham to Reagan-National flights
Birmingham to Dulles Intl flights
Stansted to Baltimore flights
Birmingham to Baltimore flights
Leeds to Dulles Intl flights
London City to Reagan-National flights
Newcastle upon Tyne to Reagan-National flights
Frankfurt to Dulles Intl flights
Leeds to Baltimore flights
Newcastle upon Tyne to Dulles Intl flights
Amsterdam to Dulles Intl flights
Cardiff to Baltimore flights
Cardiff to Dulles Intl flights
Southend to Dulles Intl flights
Exeter to Dulles Intl flights
Liverpool to Baltimore flights
Southampton to Dulles Intl flights
Southampton to Baltimore flights
Newcastle upon Tyne to Baltimore flights
Inverness to Reagan-National flights
Bristol to Dulles Intl flights
Leeds to Reagan-National flights
Inverness to Baltimore flights
Grimsby to Reagan-National flights
Grimsby to Dulles Intl flights
Grimsby to Baltimore 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 10 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£324Average£485FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£349Average£459FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£364Average£655FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£366Average£590FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£366Average£666FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£401Average£644FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£408Average£614FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£410Average£540FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Austrian AirlinesCheapest£418Average£564FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
DeltaCheapest£423Average£569FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

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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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