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

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Washington, D.C. Dulles Intl Airport departing on 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Washington, D.C..
Lufthansa Logo
13:30 - 19:50LHR-IAD
11h 20m1 stop
Lufthansa Logo
22:26 - 20:40IAD-LHR
17h 14m1 stop
£382Lufthansa
Find Deal
Sat, 10 May - Sat, 17 May
Lufthansa Logo
09:30 - 15:50LHR-IAD
11h 20m1 stop
Lufthansa Logo
22:26 - 20:40IAD-LHR
17h 14m1 stop
£385Lufthansa
Find Deal
Sat, 10 May - Sat, 17 May
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 11:45IAD-LGW
10h 15m1 stop
£430Icelandair
Find Deal
Mon, 5 May - Mon, 12 May
Icelandair Logo
15:40 - 19:20LGW-IAD
32h 40m1 stop
Icelandair Logo
20:30 - 14:40IAD-LGW
13h 10m1 stop
£432Icelandair
Find Deal
Thu, 8 May - Sun, 11 May
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£521Virgin Atlantic
Find Deal
Mon, 5 May - Mon, 12 May
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£522Virgin Atlantic
Find Deal
Fri, 2 May - Mon, 5 May
British Airways Logo
07:40 - 15:50LHR-IAD
13h 10m1 stop
British Airways Logo
17:40 - 06:15IAD-LHR
7h 35mdirect
£533British Airways
Find Deal
Thu, 8 May - Thu, 15 May
British Airways Logo
14:30 - 17:35LHR-IAD
8h 05mdirect
British Airways Logo
17:50 - 06:15IAD-LHR
7h 25mdirect
£534British Airways
Find Deal
Mon, 8 Sep - Wed, 24 Sep
Aer Lingus Logo
08:50 - 15:50LHR-IAD
12h 00m1 stop
Aer Lingus Logo
20:25 - 11:10IAD-LHR
9h 45m1 stop
£573Aer Lingus
Find Deal
Sun, 18 May - Sun, 25 May
Aer Lingus Logo
06:45 - 15:50LCY-IAD
14h 05m1 stop
Aer Lingus Logo
20:25 - 11:35IAD-LCY
10h 10m1 stop
£814Aer Lingus
Find Deal
Tue, 6 May - Fri, 9 May

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

Our best Scandinavian Airlines deals on London to Washington, D.C. Dulles Intl Airport flight tickets
Scandinavian Airlines
1 Oct
LHR19:30London Heathrow
29h 29m
1 stop
IAD19:59Washington, D.C. Dulles Intl
25 Nov
IAD20:30Washington, D.C. Dulles Intl
14h 30m
1 stop
LHR16:00London Heathrow
Scandinavian Airlines
6 Oct
LHR19:30London Heathrow
29h 29m
1 stop
IAD19:59Washington, D.C. Dulles Intl
12 Oct
IAD22:05Washington, D.C. Dulles Intl
30h 15m
1 stop
LHR09:20London Heathrow
Scandinavian Airlines
1 Oct
LHR06:40London Heathrow
18h 19m
1 stop
IAD19:59Washington, D.C. Dulles Intl
25 Nov
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow

TAP AIR PORTUGAL flights from London to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
11 Sept
LHR08:00London Heathrow
12h 20m
1 stop
IAD15:20Washington, D.C. Dulles Intl
11 Sept
IAD17:50Washington, D.C. Dulles Intl
12h 10m
1 stop
LHR11:00London Heathrow
TAP AIR PORTUGAL
19 Sept
LHR08:00London Heathrow
12h 20m
1 stop
IAD15:20Washington, D.C. Dulles Intl
29 Sept
IAD17:45Washington, D.C. Dulles Intl
11h 35m
1 stop
LHR10:20London Heathrow
TAP AIR PORTUGAL
7 May
LHR08:00London Heathrow
12h 20m
1 stop
IAD15:20Washington, D.C. Dulles Intl
11 May
IAD22:20Washington, D.C. Dulles Intl
15h 30m
1 stop
LHR18:50London Heathrow

See travel insights to Washington, D.C. from

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

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 Washington, D.C. Dulles Intl Airport?

The month of March is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from London, with most prices found around £509. If you aren’t able to travel during the month of March, then book flights to Washington, D.C. Dulles Intl Airport from London during February instead. Flights to Washington, D.C. Dulles Intl Airport in February, while not as cheap as those in March, still average around £519.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

According to our data, Wednesday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London. The lowest ticket price found for a Wednesday departure recently was £623. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £722.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is in the evening when flights can be purchased for as low as £530. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £659.

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

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

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around £619 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from London for as low as £552 on momondo.

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

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

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

As of April 2025, prices for London to Washington, D.C. Dulles Intl Airport flights are approximately 21% more expensive when compared to flights at the same time last year.

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

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

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

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

Best price found

£238

Fastest flight time

8h 00m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from London in the past 72 hours is £238. The best return flight deal from London to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is £382.
The fastest flight from London to Washington, D.C. Dulles Intl Airport takes 8h 00m
Direct flights go from London to Washington, D.C. Dulles Intl Airport every day.

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

    There are 3677.3 mi between London and Washington, D.C. Dulles Intl. Typically, this will take 8h 00m by plane in normal conditions.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport. 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 London to Washington, D.C. Dulles Intl Airport?

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


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

Compare and see reviews for airlines that fly from London to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom £250Free CancellationRating
6.9
101 reviews
Search PLAY flights
DeltaPriceFrom £320Free CancellationRating
8.0
7,920 reviews
Search Delta flights
IcelandairPriceFrom £349Free CancellationRating
7.0
484 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom £352Free CancellationRating
7.1
1,844 reviews
Search TAP AIR PORTUGAL flights
Brussels AirlinesPriceFrom £383Free CancellationRating
7.3
345 reviews
Search Brussels Airlines flights
Scandinavian AirlinesPriceFrom £440Free CancellationRating
7.3
1,344 reviews
Search Scandinavian Airlines flights
Air FrancePriceFrom £442Free CancellationRating
7.4
1,441 reviews
Search Air France flights
FinnairPriceFrom £451Free CancellationRating
7.6
1,272 reviews
Search Finnair flights
British AirwaysPriceFrom £468Free CancellationRating
6.6
6,799 reviews
Search British Airways flights
LufthansaPriceFrom £470Free CancellationRating
6.7
7,023 reviews
Search Lufthansa flights
  • Delta Flights From London to Washington, D.C. Dulles Intl Airport

    The lowest priced Delta flight from London to Washington, D.C. Dulles Intl Airport from the last 72 hours was £428. Generally, Delta has 7 flights on this route every week with an average price of £1,022. Delta is rated 8.0/10 by our users.

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

    Across 1,331 KLM reviews on momondo, the average score is 7.8/10. KLM flies from London to Washington, D.C. Dulles Intl Airport about 7 times each week, with ticket deals ranging from £680 to £855. Price data is based on momondo searches in the last 72 hours.


Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Winchester
Alexandria
Laurel
Essex
National Harbor
Fairfax
Harpers Ferry
Manassas
Bethesda
Oxon Hill
Chantilly
College Park
Front Royal
Linthicum Heights
Gettysburg
Cambridge
Ellicott City
Westminster
Hanover
Arlington

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.

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

Once you have performed a search for London to Washington, D.C. 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 London to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.


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