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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £269

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
22 mai — 29 mai1
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 Wednesday and return on a Wednesday

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 22 april 2026.

lø. 2/520:30
IAD
-
STN
2 stops22h 55m
Multiple Airlines
on. 13/521:30
STN
-
IAD
2 stops28h 05m
Multiple Airlines
Deal found 17/4£511
ti. 5/520:30
IAD
-
STN
2 stops22h 40m
Multiple Airlines
ti. 12/506:30
STN
-
IAD
2 stops18h 59m
Multiple Airlines
Deal found 19/4£511
lø. 9/519:27
IAD
-
LGW
1 stop33h 33m
Multiple Airlines
to. 28/514:00
LGW
-
IAD
2 stops29h 12m
Multiple Airlines
Deal found 18/4£511
lø. 10/1020:20
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
sø. 11/1021:05
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 20/4£513
fr. 8/523:20
IAD
-
STN
2 stops20h 30m
Multiple Airlines
on. 13/521:30
STN
-
IAD
2 stops28h 05m
Multiple Airlines
Deal found 17/4£514
ti. 5/520:30
IAD
-
STN
2 stops22h 40m
Multiple Airlines
on. 13/516:25
STN
-
IAD
2 stops33h 10m
Multiple Airlines
Deal found 19/4£514
on. 18/1121:10
IAD
-
STN
1 stop20h 05m
Turkish Airlines
fr. 27/1106:40
STN
-
IAD
1 stop17h 35m
Turkish Airlines
Deal found 19/4£516
fr. 8/523:20
IAD
-
STN
2 stops20h 30m
Multiple Airlines
on. 27/508:20
STN
-
IAD
2 stops35h 50m
Multiple Airlines
Deal found 18/4£517
ti. 8/913:20
IAD
-
STN
1 stop15h 35m
Turkish Airlines
ti. 15/917:35
STN
-
IAD
1 stop23h 00m
Turkish Airlines
Deal found 17/4£518
sø. 26/420:30
IAD
-
STN
2 stops21h 50m
Multiple Airlines
ti. 5/515:55
STN
-
IAD
2 stops28h 15m
Multiple Airlines
Deal found 17/4£520
ma. 27/420:30
IAD
-
STN
2 stops22h 50m
Multiple Airlines
to. 7/506:00
STN
-
IAD
2 stops19h 35m
Multiple Airlines
Deal found 17/4£520
fr. 9/1020:20
IAD
-
LHR
2 stops35h 35m
Scandinavian Airlines
ma. 12/1006:40
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 21/4£520

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 22 april 2026.

Round-trip from

£511

One-way from

£269

Popular in

June

Cheapest in

September

Average price

£568

Good round-trip deal

£652 or less

Good one-way deal

£379 or less
2/5-13/5
  • 2/5-13/5
  • 4 total stops
  • 51h 00m total
  • Washington, D.C. to London
Search Deals
30/5
  • 30/5
  • 3 total stops
  • 57h 20m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£71 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 22 april 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 - LTN

IADLTN

Washington, D.C. Dulles Intl

lø. 3/10

20:30-13:10

1 stop11h 40m

London Luton

on. 7/10

06:15-19:20

1 stop18h 05m

£569

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

sø. 10/5

23:20-19:40

2 stops15h 20m

London Luton

ti. 19/5

05:40-19:00

2 stops18h 20m

£578

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

on. 12/8

18:15-09:25

1 stop10h 10m

London Gatwick

fr. 21/8

10:25-19:35

1 stop14h 10m

£639

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

sø. 3/5

21:45-16:00

1 stop13h 15m

London Gatwick

fr. 15/5

10:25-19:35

1 stop14h 10m

£640

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

ma. 4/5

21:45-16:00

1 stop13h 15m

London Gatwick

ti. 12/5

10:35-22:56

2 stops17h 21m

£648
Fastest return journey

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

ti. 1/9

21:30-09:50

Nonstop7h 20m

London Heathrow

fr. 11/9

17:05-20:20

Nonstop8h 15m

£652

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

on. 23/9

12:30-09:30

2 stops16h 00m

London City

to. 1/10

08:25-15:35

1 stop12h 10m

£656

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

ma. 4/5

18:10-09:30

1 stop10h 20m

London City

ti. 12/5

09:20-18:53

2 stops14h 33m

£661

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

sø. 3/5

13:20-09:55

1 stop15h 35m

London Stansted

lø. 6/6

17:45-11:35

1 stop22h 50m

£681

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

on. 6/5

18:25-06:55

Nonstop7h 30m

London Heathrow

sø. 10/5

16:40-20:15

Nonstop8h 35m

£689

Flights are sorted by cheapest return flights first.

Deals found on 21/4

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

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

Use this chart to determine the optimal time to book a return flight from Dulles Intl to London. Price data was last updated on 17 April 2026.

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 74 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.

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 £308). Flying from Washington, D.C. Dulles Intl Airport to London in December is currently the most expensive (average of £815). 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 22 april 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 22 april 2026.

The most flights from IAD to LON are scheduled on a Monday (30 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 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 44% 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.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £463.

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 25m.

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 Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 21m.

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

About 20% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 167 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 early afternoon tend to experience delays more often.

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

Tuesday 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, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.

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 22 april 2026.
See what other customers who have flown with Virgin Atlantic,United Airlines, andAmerican Airlines 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
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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
687 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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!
United Airlines
7.4
Good
9,625 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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!
American Airlines
7.1
Good
11,647 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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
7,940 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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
7,905 reviews
Virgin Atlantic
7.5
Good
687 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

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 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 Delta, Virgin Atlantic, or British Airways 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 £307. Additional return tickets that might be worth considering are offered by Icelandair and Virgin Atlantic, with the lowest prices starting at £366 and £375, respectively. Lufthansa is 45% 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 £158. 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 (89%), Delta (85%), Virgin Atlantic (85%).

  • 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 £329. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £491 on average, our data indicates £751 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 £308). Flying from Washington, D.C. Dulles Intl Airport to London in December is currently the most expensive (average of £815). 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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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 22 april 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£307Average£402FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£366Average£561FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£375Average£565FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£387Average£570FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£487Average£655FlexibilityNo 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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