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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £306

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
28 Jun — 5 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in September or February, booked 74 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Dulles Intl to London

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 May 2026.

Mon 10/820:20
IAD
-
LGW
1 stop31h 05m
SWISS
Fri 21/809:25
LGW
-
IAD
1 stop12h 20m
SWISS
Deal found 24/5£657
Fri 18/918:35
IAD
-
LHR
Nonstop7h 20m
Austrian Airlines
Mon 5/1019:30
LHR
-
IAD
1 stop23h 30m
Austrian Airlines
Deal found 25/5£657
Mon 10/820:55
IAD
-
LTN
1 stop10h 50m
Multiple Airlines
Fri 21/806:20
LTN
-
IAD
1 stop14h 25m
Multiple Airlines
Deal found 24/5£658
Thu 1/1020:20
IAD
-
LHR
1 stop11h 40m
Multiple Airlines
Tue 6/1016:40
LHR
-
IAD
Nonstop8h 40m
Multiple Airlines
Deal found 25/5£658
Mon 10/808:18
IAD
-
LHR
1 stop17h 12m
Air Canada
Fri 21/809:30
LHR
-
IAD
2 stops16h 48m
Air Canada
Deal found 24/5£659
Mon 10/812:29
IAD
-
LCY
2 stops16h 01m
Virgin Atlantic
Fri 21/807:45
LCY
-
IAD
1 stop12h 50m
Virgin Atlantic
Deal found 24/5£660
Sun 9/817:15
IAD
-
STN
1 stop9h 35m
Multiple Airlines
Tue 18/806:30
STN
-
IAD
1 stop14h 15m
Multiple Airlines
Deal found 25/5£660
Mon 16/1117:25
IAD
-
LGW
2 stops22h 10m
TAP AIR PORTUGAL
Fri 20/1110:40
LGW
-
IAD
1 stop14h 55m
TAP AIR PORTUGAL
Deal found 25/5£660
Wed 14/1020:20
IAD
-
LCY
1 stop11h 15m
Multiple Airlines
Mon 19/1009:15
LCY
-
IAD
1 stop11h 50m
Multiple Airlines
Deal found 26/5£660
Mon 6/709:45
IAD
-
LTN
3 stops33h 45m
Multiple Airlines
Sun 12/718:10
LTN
-
IAD
3 stops31h 14m
Multiple Airlines
Deal found 24/5£660
Tue 25/812:35
IAD
-
LHR
2 stops16h 25m
Air Canada
Wed 2/909:30
LHR
-
IAD
2 stops12h 05m
Air Canada
Deal found 25/5£660
Fri 3/716:20
IAD
-
STN
2 stops26h 00m
Multiple Airlines
Sat 11/706:35
STN
-
IAD
3 stops19h 38m
Multiple Airlines
Deal found 26/5£661

Find flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to London (LON). 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 29 May 2026.

Round-trip from

£657

One-way from

£306

Popular in

June

Cheapest in

September

Average price

£686

Good round-trip deal

£851 or less

Good one-way deal

£444 or less
SWISS
  • SWISS
  • 10/8-21/8
  • 2 total stops
  • 43h 25m total
  • Washington, D.C. to London
Search Deals
6/9
  • 6/9
  • 2 total stops
  • 18h 40m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£100 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to London (LON).
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl to London 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 29 May 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 21/11

21:20-09:55

1 stop31h 35m

London Stansted

Fri 27/11

10:55-19:25

1 stop37h 30m

£666

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 11/9

21:45-09:55

1 stop31h 10m

London Stansted

Fri 18/9

10:50-11:35

1 stop29h 45m

£666

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 7/10

13:20-22:10

1 stop27h 50m

London Stansted

Mon 12/10

10:50-11:35

1 stop29h 45m

£667

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 10/9

18:35-06:55

Nonstop7h 20m

London Heathrow

Wed 23/9

06:50-13:30

1 stop11h 40m

£671

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mon 21/9

15:25-08:40

1 stop12h 15m

London City

Thu 1/10

09:15-16:05

1 stop11h 50m

£672

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 8/11

18:20-06:40

Nonstop7h 20m

London Heathrow

Sat 14/11

13:45-16:45

1 stop32h 00m

£673

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 13/8

15:45-10:00

1 stop13h 15m

London Heathrow

Fri 21/8

06:50-14:20

1 stop12h 30m

£674

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 16/8

18:15-16:00

1 stop16h 45m

London Gatwick

Sun 23/8

10:25-19:35

1 stop14h 10m

£680

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 17/9

18:15-16:00

1 stop16h 45m

London Gatwick

Fri 25/9

17:00-11:45

2 stops23h 45m

£688

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 13/9

21:45-16:00

1 stop13h 15m

London Gatwick

Sat 3/10

10:25-00:32

2 stops19h 07m

£688

Flights are sorted by cheapest return flights first.

Deals found on 27/5

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to London

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £310). Flying from Washington, D.C. Dulles Intl Airport to London in May is currently the most expensive (average of £1,447). 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 IAD to LON?

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 May 2026.

When flying from Washington, D.C. Dulles Intl Airport to London, 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 Washington, D.C. Dulles Intl Airport to London

Explore weekly flight availability from Dulles Intl to London. 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 29 May 2026.

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

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

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 45% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London on Cheapflights.

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

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

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £497.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 38m.

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

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

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 30m.

How often are flights from Washington, D.C. to London delayed?

About 19% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 168 minutes.

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

Historically, flights departing at night 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?

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

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

Over the past year, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 29 May 2026.
See what other customers who have flown with Virgin Atlantic,United Airlines, andBritish Airways from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

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
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

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
9,762 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

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
8,008 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

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 Dulles Intl to London. 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 Washington, D.C. Dulles Intl Airport to London?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London in 7h 20m. Fly via Turkish Airlines, United Airlines, or Lufthansa to get the fastest option. Airlines will cover a distance of 3664 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 Washington, D.C. Dulles Intl Airport to London round-trip?

    Flying on Lufthansa is currently your cheapest option to London, with prices starting at £309. Additional return tickets that might be worth considering are offered by Icelandair and Virgin Atlantic, with the lowest prices starting at £368 and £378, respectively. Lufthansa is 46% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £159. However, be on the lookout for offers from Virgin Atlantic and British Airways, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

    The most popular flight routes from Washington, D.C. Dulles Intl Airport to London are Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick and Washington, D.C. Dulles Intl - London Stansted.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to London on time: United Airlines (86%), Aer Lingus (83%), Finnair (83%).

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

    Looking at all options, your cheapest flight can be booked for £365. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £459 on average, our data indicates £865 when flying from Washington, D.C. Dulles Intl Airport to London.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £310). Flying from Washington, D.C. Dulles Intl Airport to London in May is currently the most expensive (average of £1,447). 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 London?

Book flights to London if you plan to visit one of these locations
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Milton Keynes
Wembley
Luton
Gatwick
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Ilford
Slough
Hayes
Brentford
Colchester
Kingston upon Thames
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Ipswich
Watford
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Guildford
Borehamwood
Southall
Southend-on-Sea

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Top 5 airlines flying from Dulles Intl to London

Discover the top 5 airlines that operate flights from Dulles Intl to London. 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 29 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£309Average£404FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£368Average£697FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£378Average£569FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£386Average£582FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£491Average£660FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 Dulles Intl to London?

When you search for this flight from Dulles Intl to London, 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 Dulles Intl to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Dulles Intl to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to London from Dulles Intl 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 Dulles Intl to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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