Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Washington, D.C. Dulles Intl Airport from £364

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
23 Dec — 30 Dec1
1 adult

The best prices from London to Washington, D.C. Dulles Intl are usually found in April or January, booked 86 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

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 18 December 2024.

Round-trip from

£439

One-way from

£364

Popular in

June

Cheapest in

April

Average price

£675
Icelandair
  • Icelandair
  • 13/2-4/3
  • 2 total stops
  • 21h 45m total
  • London to Washington, D.C.
15/1
  • 15/1
  • 1 total stop
  • 31h 50m total
  • London to Washington, D.C.
High demand for flights, 8% potential price rise
Best time to find cheap flights, 1% potential price drop
Average for round-trip flights in December 2024

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 18 December 2024.

Tue 24/1218:30LHR - IAD
1 stop31h 30mTAP AIR PORTUGAL
Mon 20/119:15IAD - LHR
1 stop21h 20mTAP AIR PORTUGAL
Deal found 17/12£575
Tue 24/1218:40LHR - IAD
1 stop26h 00mScandinavian Airlines
Mon 20/117:10IAD - LHR
2 stops16h 25mScandinavian Airlines
Deal found 17/12£611
Tue 24/1216:35LGW - IAD
1 stop33h 25mTAP AIR PORTUGAL
Fri 10/122:30IAD - LGW
1 stop12h 15mTAP AIR PORTUGAL
Deal found 16/12£623
Tue 31/1208:40LHR - IAD
1 stop12h 05mDelta
Wed 22/119:37IAD - LHR
1 stop9h 53mDelta
Deal found 17/12£635
Sat 28/1207:25STN - IAD
1 stop13h 15mMultiple Airlines
Mon 20/117:10IAD - STN
1 stop17h 45mMultiple Airlines
Deal found 17/12£643
Mon 23/1210:40LGW - IAD
1 stop32h 50mMultiple Airlines
Wed 8/119:40IAD - LGW
1 stop10h 15mMultiple Airlines
Deal found 17/12£646
Tue 31/1207:45LCY - IAD
1 stop13h 00mDelta
Mon 20/117:35IAD - LCY
1 stop9h 35mDelta
Deal found 17/12£676
Mon 30/1206:30LHR - IAD
1 stop18h 50mMultiple Airlines
Mon 6/117:35IAD - LHR
1 stop35h 05mMultiple Airlines
Deal found 16/12£696
Tue 31/1214:30LHR - IAD
1 stop24h 16mAir Canada
Wed 25/610:25IAD - LHR
2 stops15h 05mAir Canada
Deal found 17/12£698
Tue 31/1211:10LHR - IAD
2 stops17h 49mUnited Airlines
Tue 7/122:09IAD - LHR
1 stop32h 06mUnited Airlines
Deal found 17/12£699
Tue 31/1206:30LHR - IAD
1 stop14h 15mKLM
Tue 7/117:35IAD - LHR
1 stop12h 10mKLM
Deal found 17/12£709
Sat 28/1206:00LHR - IAD
1 stop13h 35mAustrian Airlines
Sat 28/1217:50IAD - LHR
1 stop32h 35mAustrian Airlines
Deal found 17/12£716

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 858,174 searches. Data last updated 18 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 13/2

11:55-18:25

1 stop11h 30m

Washington, D.C. Dulles Intl

Tue 4/3

19:40-10:55

1 stop10h 15m

£439

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 1/2

06:30-18:25

2 stops16h 55m

Washington, D.C. Dulles Intl

Sat 8/2

19:40-13:20

2 stops12h 40m

£440

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 18/1

18:00-09:46

1 stop20h 46m

Washington, D.C. Dulles Intl

Tue 21/1

06:05-20:35

1 stop9h 30m

£462

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 28/1

08:50-18:25

2 stops14h 35m

Washington, D.C. Dulles Intl

Sat 1/2

19:40-08:35

3 stops31h 55m

£464

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 31/1

12:15-18:25

1 stop11h 10m

Washington, D.C. Dulles Intl

Fri 7/2

19:40-10:50

1 stop10h 10m

£469

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 16/1

09:50-15:40

1 stop10h 50m

Washington, D.C. Dulles Intl

Tue 21/1

17:10-11:25

1 stop13h 15m

£472

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 31/1

21:05-15:40

2 stops23h 35m

Washington, D.C. Dulles Intl

Fri 7/2

17:10-14:35

2 stops16h 25m

£473

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 13/2

06:00-15:00

1 stop14h 00m

Washington, D.C. Dulles Intl

Tue 4/3

17:30-21:35

1 stop23h 05m

£476

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Tue 28/1

09:00-18:25

2 stops14h 25m

Washington, D.C. Dulles Intl

Sat 1/2

19:40-20:55

2 stops20h 15m

£485

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 13/2

15:55-21:00

1 stop34h 05m

Washington, D.C. Dulles Intl

Tue 4/3

17:30-09:50

1 stop11h 20m

£487

Flights are sorted by cheapest return flights first.

Deals found on 17/12

Showing 1-10 of 60 results
1
2
3
...
6

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 13 December 2024.

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 86 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 £599). 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 18 December 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 18 December 2024.

The most flights from LON to IAD are scheduled on a Tuesday (27 on average). You will have fewer flight options on Friday, 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 18 December 2024.
Get a feel of what it's like to fly with Icelandair, Lufthansa and TAP AIR PORTUGAL 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
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

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
8,604 reviews
8.0
Very Good
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Reviews

1 / 10

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

7.8
Good
1,349 reviews
8.0
Very Good
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Reviews

1 / 10

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

7.7
Good
1,285 reviews
8.0
Very Good
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Reviews

1 / 10

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

7.6
Good
787 reviews
8.0
Very Good
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

Reviews

1 / 10

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

7.6
Good
1,606 reviews
8.0
Very Good
8,604 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Food

7.3

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 Icelandair. Our recent data shows that you can find tickets from as low as £439 on this airline. Additional options worth looking into are Lufthansa and Aer Lingus, starting at £462 and £472 round-trip. Users have found that Icelandair is 28% 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 Icelandair, with whom users have recently found tickets for as low as £372. However, be on the lookout for offers from TAP AIR PORTUGAL and Aer Lingus, 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 (89%), Austrian Airlines (89%), Copa Airlines( 89%).

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

    On average you can expect to pay £1,313 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £507 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £446.

  • 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?

    Hallgrímskirkja, National Cathedral, and Harpa are currently the most popular points of interest in Reykjavik at the moment. Those on a stopover in Reykjavik interested in visiting Hallgrímskirkja, National Cathedral, or Harpa can do so by traveling 23.2 mi, 23.0 mi, and 23.3 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 £35 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 £599). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 18 December 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 858,174 searches. Data last updated 18 December 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£263Average£430FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£337Average£663FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£371Average£548FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£399Average£631FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£403Average£756FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Scandinavian AirlinesCheapest£415Average£567FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
American AirlinesCheapest£418Average£674FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£431Average£694FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Aer LingusCheapest£453Average£595FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£456Average£653FlexibilityNo 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 London to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from London today with Cheapflights!

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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.