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Flights to Washington, D.C. Dulles Intl

£275 Cheap flights to Washington, D.C. Dulles Intl Airport

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Washington, D.C. Dulles Intl Airport departing on 3/9. 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
1 adult, Economy, 0 bags

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

Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
13:05 - 19:20LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
11h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
20:30 - 11:55IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 25m1 stop Reykjavik Keflavik Intl
£432Icelandair
Wed, 9 Sep - Sat, 19 Sep
British Airways Logo
08:50 - 15:45LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
11h 55m1 stop Dublin
British Airways Logo
18:05 - 06:15IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 10mdirect
£432British Airways
Fri, 16 Oct - Sun, 1 Nov
Lufthansa Logo
12:05 - 15:40LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 35mdirect
Lufthansa Logo
22:15 - 10:50IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 35mdirect
£432Lufthansa
Fri, 13 Nov - Tue, 17 Nov
Lufthansa Logo
12:05 - 15:40LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 35mdirect
Lufthansa Logo
18:20 - 06:40IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 20mdirect
£432Lufthansa
Wed, 11 Nov - Sun, 15 Nov
United Airlines Logo
09:30 - 16:05LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
11h 35m1 stop Frankfurt am Main
United Airlines Logo
16:30 - 11:20IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
14h 50m1 stop Toronto Pearson Intl
£432United Airlines
Thu, 22 Oct - Sat, 31 Oct
United Airlines Logo
07:30 - 15:10LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
12h 40m1 stop Frankfurt am Main
United Airlines Logo
16:30 - 06:30IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 00m1 stop Toronto Pearson Intl
£432United Airlines
Fri, 23 Oct - Wed, 28 Oct
Air Canada Logo
06:50 - 15:25LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
13h 35m2 stops Brussels Bruxelles-National Toronto Pearson Intl
Air Canada Logo
12:43 - 10:00IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
16h 17m1 stop Montreal Pierre Elliott Trudeau Intl
£432Air Canada
Thu, 24 Sep - Sun, 27 Sep
Air Canada Logo
09:00 - 20:10LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
16h 10m2 stops Zurich Toronto Pearson Intl
Air Canada Logo
09:55 - 07:10IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
16h 15m1 stop Montreal Pierre Elliott Trudeau Intl
£432Air Canada
Wed, 6 Jan - Wed, 20 Jan
Icelandair Logo
13:00 - 22:15LGW  London Gatwick-IAD Washington, D.C. Dulles Intl
14h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
20:30 - 14:40IAD  Washington, D.C. Dulles Intl-LGW London Gatwick
13h 10m1 stop Reykjavik Keflavik Intl
£432Icelandair
Tue, 1 Sep - Mon, 14 Sep
British Airways Logo
12:15 - 15:40LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 25mdirect
British Airways Logo
17:05 - 09:05IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
11h 00m1 stop Dublin
£433British Airways
Wed, 23 Dec - Wed, 6 Jan

momondo Fare Finder

 
Locate flights to Washington, D.C. Dulles Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 279,928 searches and data was last updated on 5 August 2026.
Use the filters below to find and compare flights to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Wed 9/9

13:05-19:20

1 stop11h 15m

Washington, D.C. Dulles Intl

Sat 19/9

20:30-11:55

1 stop10h 25m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Fri 16/10

08:50-15:45

1 stop11h 55m

Washington, D.C. Dulles Intl

Sun 1/11

18:05-06:15

Nonstop7h 10m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Fri 13/11

12:05-15:40

Nonstop8h 35m

Washington, D.C. Dulles Intl

Tue 17/11

22:15-10:50

Nonstop7h 35m

£432
Fastest return journey

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Wed 11/11

12:05-15:40

Nonstop8h 35m

Washington, D.C. Dulles Intl

Sun 15/11

18:20-06:40

Nonstop7h 20m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Thu 22/10

09:30-16:05

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 31/10

16:30-11:20

1 stop14h 50m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Fri 23/10

07:30-15:10

1 stop12h 40m

Washington, D.C. Dulles Intl

Wed 28/10

16:30-06:30

1 stop10h 00m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Thu 24/9

06:50-15:25

2 stops13h 35m

Washington, D.C. Dulles Intl

Sun 27/9

12:43-10:00

1 stop16h 17m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Wed 6/1

09:00-20:10

2 stops16h 10m

Washington, D.C. Dulles Intl

Wed 20/1

09:55-07:10

1 stop16h 15m

£432

LondonWashington, D.C.

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

LGWIAD

London Gatwick

Tue 1/9

13:00-22:15

1 stop14h 15m

Washington, D.C. Dulles Intl

Mon 14/9

20:30-14:40

1 stop13h 10m

£432

LondonWashington, D.C.

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

LHRIAD

London Heathrow

Wed 23/12

12:15-15:40

Nonstop8h 25m

Washington, D.C. Dulles Intl

Wed 6/1

17:05-09:05

1 stop11h 00m

£433

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. Dulles Intl Airport from

Flights to Washington, D.C. Dulles Intl Airport – Travel Insights & Trends

Get data-powered insights and trends for flights to Washington, D.C. Dulles Intl Airport to help you craft the best travel plan.

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

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

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

According to our data, Friday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from United Kingdom. The lowest ticket price found for a Friday departure recently was £561. 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 United Kingdom because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £615.

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

The month of September is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from United Kingdom, with most prices found around £500. If you aren’t able to travel during the month of September, then book flights to Washington, D.C. Dulles Intl Airport from United Kingdom during February instead. Flights to Washington, D.C. Dulles Intl Airport in February, while not as cheap as those in September, still average around £503.

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 at midday when flights can be purchased for as low as £571. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £581.

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

Fly from Edinburgh Turnhouse to Washington, D.C. Dulles Intl for the best United Kingdom - 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 United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around £540 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from United Kingdom for as low as £493 on momondo.

Cheapest flights to Washington, D.C. Dulles Intl

Find the cheapest flights to Washington, D.C. Dulles Intl from your nearest city or airport
Find flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
CHEAPEST MONTH TO FLY TO WASHINGTON, D.C. DULLES INTL AIRPORT FROM LONDON HEATHROW AIRPORTFebruary14% cheaperFlying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport costs on average just £466 in February
MOST EXPENSIVE MONTH TO FLY TO WASHINGTON, D.C. DULLES INTL AIRPORT FROM LONDON HEATHROW AIRPORTAugust9% more expensiveIt costs about £591 for flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in August
MOST POPULAR MONTH TO FLY TO WASHINGTON, D.C. DULLES INTL AIRPORT FROM LONDON HEATHROW AIRPORTJuly530% more users visitedMore momondo users searched in flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in July than any other month

Cheap Washington, D.C. Dulles Intl Airport flight deals and tips

Summary info about Washington, D.C. Dulles Intl Airport flight prices, duration and airlines

Best One-Way Price

£275

Best Round-Trip Price

£432

Fastest flight time

12h 55m

Popular in

May
The best one-way flight price to Washington, D.C. from United Kingdom in the last 5 days is £275 (Edinburgh Turnhouse to Washington, D.C. Dulles Intl).
Search Deals
The best return flight price to Washington, D.C. from United Kingdom in the last 5 days is £432 (London Heathrow to Washington, D.C. Dulles Intl).
Search Deals
The fastest flight to Washington, D.C. from United Kingdom takes 12h 55m (Glasgow Intl to Washington, D.C. Dulles Intl).
Search Deals
May has the highest demand for flights to Washington, D.C., with a 8% price increase on average.
Search Deals

Frequently asked questions about flying to Washington, D.C. Dulles Intl Airport

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, when booking your flight to Washington, D.C. Dulles Intl Airport, September is the cheapest month on average.

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

On average, from most locations, when planning your trip to Washington, D.C. Dulles Intl Airport, try to book your flight in the region of 82 days in advance for the cheapest prices.

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

In general, booking your departure to Washington, D.C. Dulles Intl Airport for a Friday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.

What is the cheapest time of day to fly to Washington, D.C. Dulles Intl Airport?

On average you can find the best deals on plane tickets to Washington, D.C. Dulles Intl Airport when looking for flights with Midday departure times.

Is there an alternative airport near Washington, D.C. Dulles Intl Airport?

Finding an alternative and possibly cheaper destination airport near Washington, D.C. Dulles Intl Airport is possible. If you are planning a flight to Washington, D.C. Dulles Intl Airport, consider booking flights to Washington, D.C. Reagan-National Airport (4 mi from Washington, D.C. city centre) or Baltimore/Washington Airport (27 mi from Washington, D.C. city centre).

Is there a cheaper alternative to flying into Washington, D.C.?

Prices vary based on where travellers are departing from, but on average, the cheapest airport to fly to in Washington, D.C. is Washington, D.C. Reagan-National Airport where the average price is £301. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.

What is the absolute cheapest flight to Washington, D.C.?

The best deal found on momondo in the last two weeks was a flight to Washington, D.C. from Boston for £43. This is 86% cheaper than most flight deals to Washington, D.C.. To find the cheapest price to Washington, D.C. from your area, use momondo’s Airport-to-Airport Pricing Tool.

Which airlines fly to Washington, D.C. Dulles Intl Airport?

Of the 17 airlines that fly to Washington, D.C. Dulles Intl Airport, Virgin Atlantic, British Airways and Aer Lingus happen to be the most favoured based on our user data. Virgin Atlantic is the most popular among the three airlines, with 34% of users choosing them for their travels to Washington, D.C. Dulles Intl Airport.

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

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

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

There are 23 operators available for flights to Washington, D.C. Dulles Intl Airport as of August 2026.

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

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 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 you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
College Park
Springfield
Fairfax
Arlington
Gettysburg
Linthicum Heights
National Harbor
Winchester
Ellicott City
Cambridge
Glen Burnie
Westminster
Laurel
Lutherville Timonium
Lexington Park
Leesburg
Owings Mills
Woodbridge
Bethesda

Why use momondo?

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

Finding the right flight to Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

Yes. All flights to Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to Washington, D.C..

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

Yes. momondo can track flight prices for Washington, D.C. and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Washington, D.C. Dulles Intl trip

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Find better results for your trip to Washington, D.C. Dulles Intl Airport IAD

Popular Flights to Washington, D.C. Dulles Intl Airport

Popular routes according to searches in the past day on momondo
Flights from London Heathrow to IADfrom £621
Flights from Dublin to IADfrom £605
Flights from Edinburgh Turnhouse to IADfrom £571