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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from $376

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 Heathrow Airport to Washington, D.C. Dulles Intl Airport departing on 5/5. 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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Find the cheapest flights from London Heathrow Airport to Washington, D.C.

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from London Heathrow Airport to Washington, D.C..
United Airlines Logo
9:30 am - 7:26 amLHR-IAD
26h 56m2 stops
United Airlines Logo
1:53 pm - 10:00 amIAD-LHR
15h 07m1 stop
$423United Airlines
Find Deal
Sat, May 3 - Sun, May 4
United Airlines Logo
9:30 am - 11:14 amLHR-IAD
30h 44m1 stop
United Airlines Logo
5:48 pm - 10:10 amIAD-LHR
11h 22m1 stop
$425United Airlines
Find Deal
Sat, May 3 - Sun, May 4
Lufthansa Logo
9:30 am - 3:50 pmLHR-IAD
11h 20m1 stop
Lufthansa Logo
10:26 pm - 8:40 pmIAD-LHR
17h 14m1 stop
$576Lufthansa
Find Deal
Mon, May 12 - Sat, May 17
Lufthansa Logo
7:25 am - 3:20 pmLHR-IAD
12h 55m1 stop
Lufthansa Logo
5:31 pm - 6:30 amIAD-LHR
31h 59m1 stop
$585Lufthansa
Find Deal
Sun, Jun 1 - Sat, Jun 28
Icelandair Logo
9:25 pm - 7:20 pmLHR-IAD
26h 55m1 stop
Icelandair Logo
8:30 pm - 8:20 pmIAD-LHR
18h 50m1 stop
$626Icelandair
Find Deal
Mon, Apr 28 - Mon, May 12
Icelandair Logo
1:05 pm - 7:20 pmLHR-IAD
11h 15m1 stop
Icelandair Logo
8:30 pm - 11:55 amIAD-LHR
10h 25m1 stop
$628Icelandair
Find Deal
Fri, May 2 - Sun, May 11
Virgin Atlantic Logo
8:40 am - 3:35 pmLHR-IAD
11h 55m1 stop
Virgin Atlantic Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
$683Virgin Atlantic
Find Deal
Thu, May 8 - Sun, May 11
Virgin Atlantic Logo
12:35 pm - 4:00 pmLHR-IAD
8h 25mnonstop
Virgin Atlantic Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
$706Virgin Atlantic
Find Deal
Thu, May 1 - Fri, May 23
Delta Logo
8:40 am - 3:35 pmLHR-IAD
11h 55m1 stop
Delta Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
$733Delta
Find Deal
Tue, Apr 29 - Tue, May 6
Delta Logo
6:30 am - 3:35 pmLHR-IAD
14h 05m1 stop
Delta Logo
5:50 pm - 6:20 amIAD-LHR
7h 30mnonstop
$735Delta
Find Deal
Wed, Apr 30 - Fri, May 9

Virgin Atlantic flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Our best Virgin Atlantic deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets
Virgin Atlantic
May 8
LHR8:40 amLondon Heathrow
11h 55m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
May 11
IAD5:50 pmWashington, D.C. Dulles Intl
7h 30m
LHR6:20 amLondon Heathrow
Virgin Atlantic
Apr 24
LHR9:00 amLondon Heathrow
12h 20m
1 stop
IAD4:20 pmWashington, D.C. Dulles Intl
Apr 30
IAD5:50 pmWashington, D.C. Dulles Intl
7h 30m
LHR6:20 amLondon Heathrow
Virgin Atlantic
Apr 24
LHR12:35 pmLondon Heathrow
8h 25m
IAD4:00 pmWashington, D.C. Dulles Intl
Apr 30
IAD5:50 pmWashington, D.C. Dulles Intl
7h 30m
LHR6:20 amLondon Heathrow

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

Our best Scandinavian Airlines deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets
Scandinavian Airlines
May 31
LHR6:40 amLondon Heathrow
18h 19m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
Jun 7
IAD10:05 pmWashington, D.C. Dulles Intl
12h 55m
1 stop
LHR4:00 pmLondon Heathrow
Scandinavian Airlines
May 31
LHR6:40 amLondon Heathrow
18h 19m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
Jun 7
IAD10:05 pmWashington, D.C. Dulles Intl
15h 25m
1 stop
LHR6:30 pmLondon Heathrow
Scandinavian Airlines
May 31
LHR6:40 amLondon Heathrow
18h 19m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
Jun 7
IAD10:05 pmWashington, D.C. Dulles Intl
18h 35m
1 stop
LHR9:40 pmLondon Heathrow

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Heathrow Airport 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?

In general, February is the cheapest month to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $693. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $712.

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

Our data shows that Tuesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $854. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Washington, D.C. Dulles Intl Airport for around $978.

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

Flying to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $928 on average. Flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London Heathrow - 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 Heathrow Airport 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 $827 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 Heathrow Airport for as low as $738 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of April 2025, prices for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights are approximately 32% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$376

Fastest flight time

8h 10m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in the past 72 hours is $376. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $423.
The fastest flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport takes 8h 10m
Direct flights go from London Heathrow Airport to Washington, D.C. Dulles Intl Airport every day.

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

    The distance between London Heathrow and Washington, D.C. Dulles Intl is about 3664.4 mi. In terms of flight time, this usually takes a little over 8h 10m.

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

    Prices for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.

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

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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


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

Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $390Free CancellationRating
7.3
1,335 reviews
Search Scandinavian Airlines flights
PLAYPriceFrom $392Free CancellationRating
6.9
101 reviews
Search PLAY flights
Austrian AirlinesPriceFrom $431Free CancellationRating
7.5
775 reviews
Search Austrian Airlines flights
IcelandairPriceFrom $529Free CancellationRating
7.0
482 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $564Free CancellationRating
7.1
1,837 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $586Free CancellationRating
7.0
2,676 reviews
Search Iberia flights
British AirwaysPriceFrom $594Free CancellationRating
6.6
6,767 reviews
Search British Airways flights
American AirlinesPriceFrom $619Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $652Free CancellationRating
8.0
7,917 reviews
Search Delta flights
Aer LingusPriceFrom $660Free CancellationRating
7.0
1,063 reviews
Search Aer Lingus flights
  • Delta Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport

    Delta operates around 7 flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport every week. The average price of these flights found in the last 72 hours has been $925, but momondo users have found Delta deals from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from as low as $652 round-trip. Delta has been scored 8.0/10 in 7,917 reviews.

  • Austrian Airlines Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport

    Austrian Airlines is also a popular choice for this route. Austrian Airlines flight deals for London Heathrow Airport to Washington, D.C. Dulles Intl Airport start from as low as $431 round-trip, depending on your selected dates, with average Austrian Airlines deals seen on momondo around $1,181. Austrian Airlines operates 14 flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in an average week. Users have rated it 7.5/10 across 775 reviews.


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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Gettysburg
National Harbor
Laurel
Winchester
Silver Spring
Woodbridge
Tysons
Fredericksburg
Waldorf
Manassas
Harpers Ferry
Gaithersburg
Rockville
Glen Burnie
Fairfax
Linthicum Heights
Towson
Reston

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.

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

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

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 simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.


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