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Cheap flights from London to Washington, D.C. Dulles Intl Airport from £375

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 70 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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 31 October 2025.

Round-trip from

£411

One-way from

£375

Popular in

July

Cheapest in

September

Average price

£552

Good round-trip deal

£525 or less

Good one-way deal

£465 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 22/1-25/1
  • 2 total stops
  • 47h 30m total
  • London to Washington, D.C.
Search Deals
26/11
  • 26/11
  • 3 total stops
  • 56h 29m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£56 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from London (LON) to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from London (LON) to Washington, D.C. Dulles Intl.
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Find flight deals from London to Dulles Intl

Enter your travel dates to find the best prices.

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 31 October 2025.

Mon 29/1208:50LTN - IAD
1 stop15h 40mMultiple Airlines
Sun 4/121:00IAD - LTN
1 stop9h 45mMultiple Airlines
Deal found 28/10£414
Thu 20/1114:00LGW - IAD
1 stop22h 50mMultiple Airlines
Tue 2/1217:30IAD - LGW
2 stops18h 25mMultiple Airlines
Deal found 28/10£415
Tue 2/1206:00LHR - IAD
1 stop13h 35mTAP AIR PORTUGAL
Tue 9/1217:30IAD - LHR
1 stop23h 05mTAP AIR PORTUGAL
Deal found 29/10£429
Mon 29/1206:30STN - IAD
1 stop18h 00mMultiple Airlines
Sun 4/121:00IAD - STN
1 stop18h 05mMultiple Airlines
Deal found 28/10£430
Sat 6/1218:30LHR - IAD
1 stop31h 30mTAP AIR PORTUGAL
Sun 25/122:30IAD - LHR
1 stop18h 05mTAP AIR PORTUGAL
Deal found 30/10£432
Fri 12/1205:50LTN - IAD
1 stop14h 45mMultiple Airlines
Fri 19/1217:05IAD - LTN
1 stop10h 50mMultiple Airlines
Deal found 28/10£433
Mon 24/1114:00LGW - IAD
1 stop22h 45mMultiple Airlines
Mon 8/1218:58IAD - LGW
2 stops30h 02mMultiple Airlines
Deal found 29/10£433
Fri 12/1206:30STN - IAD
1 stop14h 05mMultiple Airlines
Fri 19/1221:00IAD - STN
1 stop16h 20mMultiple Airlines
Deal found 28/10£433
Fri 21/1113:55STN - IAD
2 stops31h 10mMultiple Airlines
Tue 25/1118:05IAD - STN
2 stops21h 10mMultiple Airlines
Deal found 29/10£436
Wed 3/1220:40STN - IAD
2 stops23h 35mMultiple Airlines
Mon 8/1217:30IAD - STN
2 stops15h 35mMultiple Airlines
Deal found 29/10£438
Fri 21/1114:00LGW - IAD
1 stop22h 45mMultiple Airlines
Sun 30/1122:30IAD - LGW
2 stops29h 05mMultiple Airlines
Deal found 28/10£439
Thu 4/1214:35STN - IAD
2 stops30h 30mMultiple Airlines
Wed 10/1218:05IAD - STN
2 stops20h 35mMultiple Airlines
Deal found 30/10£439

Cheapflights Fare Finder

 
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 31 October 2025.
Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

London

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 22/1

06:30-18:30

2 stops17h 00m

Washington, D.C. Dulles Intl

Sun 25/1

19:40-20:05

2 stops19h 25m

£416

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 29/12

06:30-19:30

1 stop18h 00m

Washington, D.C. Dulles Intl

Sun 4/1

21:00-20:05

1 stop18h 05m

£430

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/12

14:35-16:05

2 stops30h 30m

Washington, D.C. Dulles Intl

Wed 10/12

18:05-19:40

2 stops20h 35m

£439

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 12/12

05:55-21:00

2 stops20h 05m

Washington, D.C. Dulles Intl

Tue 13/1

17:30-23:50

2 stops25h 20m

£445

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Tue 25/11

07:00-18:30

1 stop16h 30m

Washington, D.C. Dulles Intl

Tue 9/12

19:40-14:50

1 stop14h 10m

£456

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/12

21:20-21:00

2 stops28h 40m

Washington, D.C. Dulles Intl

Mon 8/12

17:30-16:55

2 stops18h 25m

£462

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 25/11

20:25-16:05

2 stops24h 40m

Washington, D.C. Dulles Intl

Sun 30/11

18:50-19:30

2 stops19h 40m

£466

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 3/12

21:05-17:15

2 stops25h 10m

Washington, D.C. Dulles Intl

Mon 8/12

20:30-18:50

2 stops17h 20m

£493

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 22/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 10/12

19:40-10:55

1 stop10h 15m

£493

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 25/11

11:55-18:30

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 10/12

19:40-10:55

1 stop10h 15m

£493

Flights are sorted by cheapest return flights first.

Deals found on 28/10

Showing 1-10 of 60 results
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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.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

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 24 October 2025.

The best time to book flights from London to Washington, D.C. Dulles Intl Airport is 70 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, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £343). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £546). 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 31 October 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 27% on flights from London to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the morning.

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 16 December 2024.

Travellers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday mornings 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.

How much does it cost for a return flight from London to Washington, D.C. Dulles Intl Airport?

What’s the top stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Share of one-stop return flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 38% of one-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Average return fare for one-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £418.

What’s the fastest stopover option from London to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 00m.

Which airport typically offers the quickest stopover for flights from London to Washington, D.C. Dulles Intl Airport?

Average stopover duration for one-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 11m.

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 31 October 2025.
Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as Virgin Atlantic, Aer Lingus, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
671 reviews
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Aer Lingus
7.2
Good
1,365 reviews
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Icelandair
7.1
Good
562 reviews
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,543 reviews
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,489 reviews
Virgin Atlantic
7.5
Good
671 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Crew

8.1

Overall

7.5

Boarding

7.7

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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.

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

    For as low as £493, Scandinavian Airlines can have you in Washington, D.C. Dulles Intl Airport from London in 11h 35m. London and Washington, D.C. Dulles Intl Airport are separated by a distance of 3683 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 Delta. Our recent data shows that you can find tickets from as low as £192 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Icelandair, starting at £360 and £381 round-trip. Users have found that Delta is 67% 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 £385. However, be on the lookout for offers from Aer Lingus and Austrian Airlines, 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?

    The most popular flight routes from London 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 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: KLM (89%), Air France (89%), Delta( 89%).

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

    On average you can expect to pay £1,522 for a flight from London to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £416 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £391.

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

    London to Washington, D.C. Dulles Intl Airport flights have a stopover in Dublin most often.

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

    Bord Gáis Energy Theatre, 3Olympia Theatre, and Dublin Castle are currently the most popular points of interest in Dublin at the moment. Those on a stopover in Dublin interested in visiting Bord Gáis Energy Theatre, 3Olympia Theatre, or Dublin Castle can do so by traveling 5.7 mi, 5.7 mi, and 5.8 mi, respectively from Dublin. Those looking to explore during their stopover in Dublin can hire a car from Dublin for about £16 per day.

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

    London to Washington, D.C. Dulles Intl Airport flights have a stopover in Reykjavik least often.

  • 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, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of £343). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £546). 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
Woodbridge
Arlington
Alexandria
College Park
Tysons

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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 31 October 2025.
Virgin Atlantic flights from London to Washington, D.C. Dulles Intl
British Airways flights from London to Washington, D.C. Dulles Intl
PLAY flights from London to Washington, D.C. Dulles Intl

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 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£192Average£527FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£360Average£500FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£381Average£534FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£395Average£586FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£413Average£600FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£430Average£642FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£435Average£612FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£440Average£589FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Virgin AtlanticCheapest£442Average£605FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£445Average£607FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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.

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