Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to London from £193

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 30/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap return flights

Scandinavian Airlines Logo
20:30 - 18:30IAD-LHR
17h 00m1 stop
Scandinavian Airlines Logo
06:40 - 17:15LHR-IAD
15h 35m1 stop
£367Scandinavian Airlines
Find Deal
Thu, 12 Feb - Mon, 16 Feb
Scandinavian Airlines Logo
22:05 - 18:30IAD-LHR
15h 25m1 stop
Scandinavian Airlines Logo
06:40 - 19:59LHR-IAD
18h 19m1 stop
£368Scandinavian Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
Scandinavian Airlines Logo
22:05 - 18:30IAD-LHR
15h 25m1 stop
Scandinavian Airlines Logo
18:40 - 19:59LHR-IAD
30h 19m1 stop
£368Scandinavian Airlines
Find Deal
Mon, 13 Oct - Wed, 22 Oct
Logo
20:40 - 23:20IAD-STN
22h 40m2 stops
Logo
06:30 - 18:30STN-IAD
17h 00m2 stops
£373
Find Deal
Thu, 30 Oct - Tue, 4 Nov
Logo
17:20 - 09:20IAD-LGW
11h 00m1 stop
Logo
13:10 - 19:30LGW-IAD
11h 20m1 stop
£373
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
£409Icelandair
Find Deal
Sun, 2 Nov - Mon, 2 Mar
Icelandair Logo
20:40 - 10:55IAD-LGW
10h 15m1 stop
Icelandair Logo
11:55 - 18:30LGW-IAD
11h 35m1 stop
£413Icelandair
Find Deal
Thu, 30 Oct - Sun, 2 Nov
Lufthansa Logo
17:16 - 16:25IAD-LCY
18h 09m2 stops
Lufthansa Logo
08:45 - 15:50LCY-IAD
12h 05m1 stop
£498Lufthansa
Find Deal
Wed, 3 Sep - Thu, 23 Oct
Lufthansa Logo
18:10 - 16:25IAD-LCY
17h 15m1 stop
Lufthansa Logo
19:10 - 13:30LCY-IAD
23h 20m1 stop
£510Lufthansa
Find Deal
Mon, 6 Oct - Mon, 20 Oct
Virgin Atlantic Logo
17:25 - 08:10IAD-LCY
9h 45m1 stop
Virgin Atlantic Logo
09:20 - 15:35LCY-IAD
11h 15m1 stop
£519Virgin Atlantic
Find Deal
Sun, 7 Sep - Tue, 16 Sep

Scandinavian Airlines flights from Washington, D.C. Dulles Intl Airport to London

Our best Scandinavian Airlines deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Scandinavian Airlines
12 Feb
IAD20:30Washington, D.C. Dulles Intl
17h 00m
1 stop
LHR18:30London Heathrow
16 Feb
LHR06:40London Heathrow
15h 35m
1 stop
IAD17:15Washington, D.C. Dulles Intl
£367
Find similar
Scandinavian Airlines
15 Oct
IAD22:05Washington, D.C. Dulles Intl
15h 25m
1 stop
LHR18:30London Heathrow
22 Oct
LHR06:40London Heathrow
18h 19m
1 stop
IAD19:59Washington, D.C. Dulles Intl
£368
Find similar
Scandinavian Airlines
13 Oct
IAD22:05Washington, D.C. Dulles Intl
15h 25m
1 stop
LHR18:30London Heathrow
22 Oct
LHR18:40London Heathrow
30h 19m
1 stop
IAD19:59Washington, D.C. Dulles Intl
£368
Find similar

Icelandair flights from Washington, D.C. Dulles Intl Airport to London

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to London flight tickets
Icelandair
2 Nov
IAD19:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
2 Mar
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
£409
Find similar
Icelandair
2 Sept
IAD23:15Washington, D.C. Dulles Intl
31h 40m
1 stop
LHR11:55London Heathrow
8 Nov
LHR12:15London Heathrow
11h 15m
1 stop
IAD18:30Washington, D.C. Dulles Intl
£410
Find similar
Icelandair
30 Oct
IAD20:40Washington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55London Gatwick
2 Nov
LGW11:55London Gatwick
11h 35m
1 stop
IAD18:30Washington, D.C. Dulles Intl
£413
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 279,928 searches. Data last updated 22 August 2025.
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

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 12/2

20:30-18:30

1 stop17h 00m

London Heathrow

Mon 16/2

06:40-17:15

1 stop15h 35m

£367

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 15/10

22:05-18:30

1 stop15h 25m

London Heathrow

Wed 22/10

06:40-19:59

1 stop18h 19m

£368

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 13/10

22:05-18:30

1 stop15h 25m

London Heathrow

Wed 22/10

18:40-19:59

1 stop30h 19m

£368

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 30/10

20:40-23:20

2 stops22h 40m

London Stansted

Tue 4/11

06:30-18:30

2 stops17h 00m

£373

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 16/9

17:20-09:20

1 stop11h 00m

London Gatwick

Tue 23/9

13:10-19:30

1 stop11h 20m

£373

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 2/11

19:40-10:55

1 stop10h 15m

London Gatwick

Mon 2/3

11:55-18:30

1 stop11h 35m

£409

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 30/10

20:40-10:55

1 stop10h 15m

London Gatwick

Sun 2/11

11:55-18:30

1 stop11h 35m

£413

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Wed 3/9

17:16-16:25

2 stops18h 09m

London City

Thu 23/10

08:45-15:50

1 stop12h 05m

£498

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Mon 6/10

18:10-16:25

1 stop17h 15m

London City

Mon 20/10

19:10-13:30

1 stop23h 20m

£510

Washington, D.C.London

IAD - LCY

IADLCY

Washington, D.C. Dulles Intl

Sun 7/9

17:25-08:10

1 stop9h 45m

London City

Tue 16/9

09:20-15:35

1 stop11h 15m

£519

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London?

The cheapest month to fly to London from Washington, D.C. Dulles Intl Airport is in January. Flight prices, which tend to average around £460, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around £469.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £533. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to London for around £621.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £566. Flights at midday are often more expensive, with an average ticket price of £1,423.

What is the cheapest Washington, D.C. Dulles Intl to London flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. Dulles Intl - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £561 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. Dulles Intl Airport for as low as £516 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to London flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Washington, D.C. Dulles Intl Airport to London flight prices changed over time?

As of August 2025, prices for Washington, D.C. Dulles Intl Airport to London flights are approximately 28% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. Dulles Intl Airport to London (IAD to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London

Best price found

£305

Fastest flight time

7h 10m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Washington, D.C. Dulles Intl Airport in the past 72 hours is £305. The best return flight deal from Washington, D.C. Dulles Intl Airport to London found on momondo in the last 72 hours is £420.
The fastest flight from Washington, D.C. Dulles Intl Airport to London takes 7h 10m
Direct flights go from Washington, D.C. Dulles Intl Airport to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

  • How far is Washington, D.C. Dulles Intl to London by plane?

    London is 3677.3 mi away from Washington, D.C. Dulles Intl. In terms of flight time, this usually takes a little over 9h 25m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London?

    Prices for flights from Washington, D.C. Dulles Intl Airport to London are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to London?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to London?

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to London with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £308Free CancellationRating
6.8
7,350 reviews
Search Lufthansa flights
IcelandairPriceFrom £367Free CancellationRating
7.0
529 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £377Free CancellationRating
7.4
658 reviews
Search Virgin Atlantic flights
Air FrancePriceFrom £396Free CancellationRating
7.4
1,469 reviews
Search Air France flights
British AirwaysPriceFrom £407Free CancellationRating
6.7
7,292 reviews
Search British Airways flights
IberiaPriceFrom £456Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
KLMPriceFrom £459Free CancellationRating
7.8
1,388 reviews
Search KLM flights
United AirlinesPriceFrom £486Free CancellationRating
7.4
8,934 reviews
Search United Airlines flights

  • KLM Flights From Washington, D.C. Dulles Intl Airport to London

    The lowest priced KLM flight from Washington, D.C. Dulles Intl Airport to London from the last 72 hours was £616. Generally, KLM has 5 flights on this route every week with an average price of £739. KLM is rated 7.8/10 by our users.

  • Virgin Atlantic Flights From Washington, D.C. Dulles Intl Airport to London

    Across 658 Virgin Atlantic reviews on momondo, the average score is 7.4/10. Virgin Atlantic flies from Washington, D.C. Dulles Intl Airport to London about 5 times each week, with ticket deals ranging from £507 to £821. Price data is based on momondo searches in the last 72 hours.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Maidstone
Slough
Gatwick
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Worthing
Dartford
Hounslow
Dover
Chelmsford
Hayes
Folkestone
Bedford

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to London. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

All flight searches from Washington, D.C. to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to London?

Once you have performed a search for Washington, D.C. to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 27/8
Wed 3/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport