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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £238

IAD — LON
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in February or March, booked 74 days in advance, depart on a Tuesday or Sunday and return on a Friday

Cheap flight deals from Dulles Intl to London

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to London

Mon 16/1119:40 -
1 stop10h 10m
Sun 22/1120:35 -
1 stop26h 55m
Deal found 3/11£501
Mon 30/1119:40 -
1 stop13h 25m
Tue 8/1207:05 -
1 stop16h 25m
Deal found 29/10£501
Sun 6/1222:30 -
1 stop12h 15m
Sun 13/1210:40 -
1 stop14h 55m
Deal found 31/10£502
Mon 16/1119:40 -
2 stops16h 20m
Mon 23/1106:40 -
2 stops16h 50m
Deal found 30/10£502
Mon 23/1119:40 -
1 stop18h 50m
Wed 9/1220:35 -
1 stop26h 55m
Deal found 2/11£503
Mon 14/1219:40 -
1 stop13h 25m
Sun 10/106:00 -
1 stop17h 30m
Deal found 30/10£503
Tue 24/1119:40 -
2 stops14h 40m
Tue 1/1208:50 -
2 stops14h 40m
Deal found 3/11£504
Thu 12/1117:25 -
2 stops18h 15m
Wed 18/1109:50 -
2 stops18h 53m
Deal found 29/10£505
Tue 17/1119:40 -
1 stop18h 50m
Wed 25/1112:15 -
1 stop11h 15m
Deal found 1/11£505
Tue 24/1119:40 -
2 stops19h 20m
Tue 1/1207:45 -
2 stops15h 45m
Deal found 1/11£505
Wed 25/1119:40 -
1 stop18h 50m
Mon 7/1212:15 -
1 stop11h 15m
Deal found 2/11£505
Tue 3/1117:25 -
2 stops15h 50m
Mon 23/1107:45 -
2 stops35h 55m
Deal found 31/10£505

Find flight deals from Dulles Intl to London

Round-trip from

£501

One-way from

£238

Popular in

June

Cheapest in

February

Average price

£585

Good round-trip deal

£815 or less

Good one-way deal

£256 or less
10/1-17/1
  • 10/1-17/1
  • 2 total stops
  • 31h 00m total
  • Washington, D.C. to London
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ITA Airways
  • ITA Airways
  • 29/11-31/12
  • 1 total stop
  • 12h 10m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£95 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to London (LON).
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London (LON).
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Cheapflights Fare Finder

 
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 Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Mon 11/1

19:40-07:35

2 stops30h 55m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£240

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Thu 26/11

19:40-23:05

2 stops22h 25m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£240

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Wed 27/1

19:40-07:35

2 stops30h 55m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£245
Fastest return journey

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 3/2

18:05-06:15

Nonstop7h 10m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£246

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 12/3

19:40-10:50

1 stop10h 10m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£247

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Tue 29/12

19:40-10:55

1 stop10h 15m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£254

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Wed 30/12

19:40-07:35

2 stops30h 55m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£258

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LTN London Luton

IADLTN

Washington, D.C. Dulles Intl

Wed 11/11

22:30-15:05

3 stops35h 35m

London Luton

Wed 31/12

00:00-18:00

Nonstop0h 00m

£259

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LGW London Gatwick

IADLGW

Washington, D.C. Dulles Intl

Wed 25/11

21:35-06:50

1 stop28h 15m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£264

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sat 13/3

21:45-10:00

Nonstop7h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£283

Flights are sorted by cheapest return flights first.

Deals found on 30/10

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

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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £526). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of £955). 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?

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

The most flights from IAD to LON 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 (15 on average).

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

Airfare is typical for this route at the moment.
Washington, D.C. Dulles Intl Airport to London flights typically cost between £479 and £716 in January.
The cheapest return price found within the last 5 days was £501 on Multiple Airlines (10 Jan–17 Jan).

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

Reykjavik (KEF) – chosen by Cheapflights users on 50% 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?

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £547.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 42m.

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.

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

About 17% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 173 minutes.

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

Historically, flights departing in the early afternoon 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 Thursday 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 13% 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 73 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

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
697 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

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
697 reviews
Virgin Atlantic
7.5
Good
697 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

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
7.3
Good
10,462 reviews
Virgin Atlantic
7.5
Good
697 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

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
8,282 reviews
Virgin Atlantic
7.5
Good
697 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

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

  • 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 Scandinavian Airlines, TAP AIR PORTUGAL, or United Airlines 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 British Airways is currently your cheapest option to London, with prices starting at £429. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Icelandair, with the lowest prices starting at £463 and £491, respectively. British Airways is 33% 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 Virgin Atlantic, with whom users have recently found tickets for as low as £214. However, be on the lookout for offers from British Airways and United Airlines, 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 City.

  • 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: Air Canada (85%), Austrian Airlines (85%), Iberia (82%).

  • 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 £182. While the most popular route (Washington, D.C. Dulles Intl - London Heathrow) can be booked for £282 on average, our data indicates £644 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of £526). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of £955). 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?

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Top 5 airlines flying from Dulles Intl to London

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£429Average£654FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£463Average£601FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£491Average£697FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£494Average£797FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest£594Average£964FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

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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.

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