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Cheap flights from London to Washington, D.C. Dulles Intl Airport from £342

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
25 Nov — 2 Dec1
1 adult

The best prices from London to Washington, D.C. Dulles Intl are usually found in January or April, booked 75 days in advance, depart on a Tuesday or Thursday and return on a Saturday

Find flights from London to Dulles Intl within your budget

Customise your flight search to find flights from London 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 953,013 searches. Data last updated 20 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 30/1

15:55-21:00

1 stop34h 05m

Washington, D.C. Dulles Intl

Sat 1/2

17:30-09:50

1 stop11h 20m

£424

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 18/1

18:00-09:46

1 stop20h 46m

Washington, D.C. Dulles Intl

Mon 20/1

06:05-20:35

1 stop9h 30m

£426

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 21/3

11:00-18:00

1 stop11h 00m

Washington, D.C. Dulles Intl

Sat 5/4

18:50-10:40

1 stop10h 50m

£426

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Sun 24/11

06:00-17:00

1 stop16h 00m

Washington, D.C. Dulles Intl

Mon 2/12

18:10-13:55

1 stop14h 45m

£427

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 4/12

17:50-15:00

2 stops26h 10m

Washington, D.C. Dulles Intl

Mon 9/12

19:15-18:45

2 stops18h 30m

£427

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 17/2

18:30-14:30

1 stop25h 00m

Washington, D.C. Dulles Intl

Sat 22/2

17:30-15:30

1 stop17h 00m

£430

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 13/1

11:55-18:25

1 stop11h 30m

Washington, D.C. Dulles Intl

Tue 21/1

19:40-10:55

1 stop10h 15m

£432

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 10/3

07:35-18:00

1 stop14h 25m

Washington, D.C. Dulles Intl

Fri 14/3

19:10-15:05

1 stop15h 55m

£441

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 31/1

12:15-18:25

1 stop11h 10m

Washington, D.C. Dulles Intl

Mon 3/2

19:40-10:50

1 stop10h 10m

£444

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 12/3

11:00-18:00

1 stop11h 00m

Washington, D.C. Dulles Intl

Sat 15/3

19:10-21:25

2 stops22h 15m

£468

Flights are sorted by cheapest return flights first.

Deals found on 20/11

Showing 1-10 of 47 results
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Cheap flight deals from London to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 November 2024.

Round-trip from

£424

One-way from

£345

Popular in

June

Cheapest in

January
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 30/1-1/2
  • 2 total stops
  • 45h 25m total
  • London to Washington, D.C.
PLAY
  • PLAY
  • 14/5
  • 1 total stop
  • 11h 00m total
  • London to Washington, D.C.
High demand for flights, 18% potential price rise
Best time to find cheap flights, 14% potential price drop

Find flight deals from London to Dulles Intl

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.

Sun 24/1106:00LTN - IAD
1 stop16h 00mMultiple Airlines
Mon 2/1218:10IAD - LTN
1 stop14h 45mMultiple Airlines
Deal found 18/11£427
Wed 4/1217:50LGW - IAD
2 stops26h 10mMultiple Airlines
Mon 9/1219:15IAD - LGW
2 stops18h 30mMultiple Airlines
Deal found 19/11£427
Tue 26/1111:00STN - IAD
1 stop11h 00mPLAY
Sun 1/1218:10IAD - STN
1 stop10h 50mPLAY
Deal found 19/11£427
Wed 4/1220:50LHR - IAD
2 stops23h 10mMultiple Airlines
Mon 9/1219:15IAD - LHR
2 stops19h 50mMultiple Airlines
Deal found 18/11£446
Tue 26/1120:40LHR - IAD
1 stop26h 45mIcelandair
Tue 10/1219:40IAD - LHR
1 stop18h 50mIcelandair
Deal found 20/11£505
Sun 8/1218:30LHR - IAD
1 stop23h 30mTAP AIR PORTUGAL
Mon 9/1219:15IAD - LHR
1 stop17h 15mTAP AIR PORTUGAL
Deal found 19/11£507
Wed 4/1211:55LGW - IAD
1 stop11h 30mIcelandair
Mon 9/1219:40IAD - LGW
1 stop10h 15mIcelandair
Deal found 19/11£512
Thu 5/1213:35LHR - IAD
1 stop31h 38mAustrian Airlines
Sat 7/1216:10IAD - LHR
1 stop34h 15mAustrian Airlines
Deal found 20/11£514
Thu 5/1207:50LHR - IAD
1 stop12h 50mAer Lingus
Mon 9/1220:45IAD - LHR
1 stop9h 40mAer Lingus
Deal found 19/11£523
Wed 4/1206:30STN - IAD
1 stop14h 10mMultiple Airlines
Mon 9/1217:10IAD - STN
1 stop11h 40mMultiple Airlines
Deal found 19/11£529
Thu 28/1119:30LHR - IAD
1 stop25h 10mScandinavian Airlines
Sat 1/217:10IAD - LHR
1 stop11h 10mScandinavian Airlines
Deal found 19/11£531
Fri 22/1116:20LHR - IAD
Nonstop8h 55mLufthansa
Sat 30/1117:56IAD - LHR
1 stop32h 14mLufthansa
Deal found 19/11£534

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London 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.

Travel insights for flights from London to Dulles Intl

Get recent, data-driven insights about flights from London to Dulles Intl including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from London to Dulles Intl. Price data was last updated on 15 November 2024.

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 75 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £606). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £898). 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 LON to IAD?

Find hourly flight availability from London 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 20 November 2024.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 20% on flights from London to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the evening.

What is the cheapest day to fly from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly return from London to Dulles Intl. Price data was last updated on 2 June 2024.

Travellers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from London 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 20 November 2024.

The most flights from LON to IAD are scheduled on a Monday (26 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 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 20 November 2024.
Get a feel of what it's like to fly with TAP AIR PORTUGAL, Delta and Finnair from London to Washington, D.C. by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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

8.0
Very Good
8,758 reviews
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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

7.8
Good
1,350 reviews
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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

7.7
Good
1,300 reviews
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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

7.6
Good
805 reviews
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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

7.6
Good
1,637 reviews
8.0
Very Good
8,758 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 10

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 London 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 flying from London to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from London to Washington, D.C. Dulles Intl Airport is TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £424 on this airline. Additional options worth looking into are Lufthansa and PLAY, starting at £426 and £426 round-trip. Users have found that TAP AIR PORTUGAL is 29% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is PLAY, with whom users have recently found tickets for as low as £345. However, be on the lookout for offers from Icelandair and TAP AIR PORTUGAL, as they are both options that can get you from London to Washington, D.C. Dulles Intl Airport for a low price.

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

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

    Before booking your flight to Washington, D.C. Dulles Intl Airport from London, check out the most reliable airlines to get you to your destination on time: Air Canada (82%), Austrian Airlines (82%), Copa Airlines( 82%).

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

    On average you can expect to pay £1,329 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £530 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £390.

  • Where are the most common stopover locations when flying from London to Washington, D.C. Dulles Intl Airport?

  • What are some popular things to do or see while on a stopover in Reykjavik?

    Harpa, National Cathedral, and Hallgrímskirkja are currently the most popular points of interest in Reykjavik at the moment. Those on a stopover in Reykjavik interested in visiting Harpa, National Cathedral, or Hallgrímskirkja can do so by traveling 23.3 mi, 23.0 mi, and 23.2 mi, respectively from Reykjavik Keflavik Intl. Those looking to explore during their stopover in Reykjavik can hire a car from Reykjavik Keflavik Intl for about £37 per day.

  • Where are the least popular stopover locations for London to Washington, D.C. Dulles Intl Airport flights?

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £606). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £898). 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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Fly from London to Dulles Intl on these airlines

Choose from the following airlines for your flight from London to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 20 November 2024.

Top 10 airlines flying from London to Dulles Intl

Discover the top 10 airlines that operate flights from London 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 953,013 searches. Data last updated 20 November 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£264Average£422FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£338Average£663FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£372Average£549FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£393Average£580FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£401Average£638FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£404Average£758FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Scandinavian AirlinesCheapest£416Average£562FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
American AirlinesCheapest£420Average£676FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£432Average£680FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£448Average£643FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Dulles Intl.

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

Certainly. Search results for flights to Dulles Intl from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from London to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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