What is the cheapest month to book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Currently, July is the cheapest month in which you can book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport (average of $303). Flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 day to fly from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their London Stansted Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest day to fly round-trip from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 51 days in advance, which can save you up to 44% on flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport compared to booking the week you need them. Waiting 51 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $729. For sooner than that we have options available in the next 3 days from $1,123.

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

The best pricing can be found in the month of February. Prices to Washington, D.C. Dulles Intl Airport from London Stansted Airport average $733. You can even find prices in February for less than $733, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $305. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from London Stansted Airport. Flying in the targeted month can save you up to 19%.

What is the cheapest time of day to fly from STN to IAD?

When flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Stansted to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

Can I find deals for business class flights from Stansted to Dulles Intl?

Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$537+ Cheap Flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Stansted to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Stansted to Dulles Intl

Round-trip from	$589 (Mytrip)
One-way from	$537 (Kiwi.com)
Popular in	March
Cheapest in	December
Average price	$733

From London Stansted to Washington, D.C. Dulles Intl

Search Deals

One-way flight from London Stansted to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 35% potential increase in price ($358 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 12% potential price decrease ($72 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Stansted to Dulles Intl

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

Mon 9/151:20 pmSTN - IAD

2 stops35h 39mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/18

$589

Mon 9/84:10 pmSTN - IAD

2 stops32h 49mMultiple Airlines

Thu 9/1110:05 pmIAD - STN

2 stops19h 20mMultiple Airlines

Deal found 8/19

$590

Sat 9/136:35 amSTN - IAD

2 stops18h 24mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/19

$591

Wed 9/1710:10 pmSTN - IAD

2 stops27h 40mMultiple Airlines

Wed 9/245:50 pmIAD - STN

2 stops18h 40mMultiple Airlines

Deal found 8/20

$592

Thu 9/255:50 pmSTN - IAD

2 stops26h 30mMultiple Airlines

Wed 10/15:50 pmIAD - STN

2 stops20h 15mMultiple Airlines

Deal found 8/18

$595

Tue 9/162:50 pmSTN - IAD

2 stops29h 30mMultiple Airlines

Tue 9/2310:20 pmIAD - STN

2 stops20h 50mMultiple Airlines

Deal found 8/19

$596

Tue 9/232:50 pmSTN - IAD

2 stops35h 00mMultiple Airlines

Mon 10/65:45 pmIAD - STN

2 stops25h 25mMultiple Airlines

Deal found 8/18

$601

Fri 9/512:25 pmSTN - IAD

1 stop11h 30mMultiple Airlines

Tue 9/99:00 pmIAD - STN

1 stop14h 35mMultiple Airlines

Deal found 8/18

$606

Wed 10/11:55 pmSTN - IAD

2 stops30h 25mMultiple Airlines

Fri 10/3111:30 pmIAD - STN

2 stops20h 40mMultiple Airlines

Deal found 8/19

$607

Best flights from Stansted to Dulles Intl
Discover carefully curated flight deals from Stansted to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2025.

Mon 9/151:20 pmSTN - IAD

2 stops35h 39mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/18

$589

Mon 9/84:10 pmSTN - IAD

2 stops32h 49mMultiple Airlines

Thu 9/1110:05 pmIAD - STN

2 stops19h 20mMultiple Airlines

Deal found 8/19

$590

Sat 9/136:35 amSTN - IAD

2 stops18h 24mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/19

$591

Sat 10/1110:00 pmSTN - IAD

3 stops26h 59mMultiple Airlines

Thu 10/1610:05 pmIAD - STN

2 stops19h 20mMultiple Airlines

Deal found 8/19

$591

Wed 9/1710:10 pmSTN - IAD

2 stops27h 40mMultiple Airlines

Wed 9/245:50 pmIAD - STN

2 stops18h 40mMultiple Airlines

Deal found 8/20

$592

Thu 9/255:50 pmSTN - IAD

2 stops26h 30mMultiple Airlines

Wed 10/15:50 pmIAD - STN

2 stops20h 15mMultiple Airlines

Deal found 8/18

$595

Tue 9/162:50 pmSTN - IAD

2 stops29h 30mMultiple Airlines

Tue 9/2310:20 pmIAD - STN

2 stops20h 50mMultiple Airlines

Deal found 8/19

$596

Sat 11/811:00 amSTN - IAD

1 stop12h 50mMultiple Airlines

Sat 11/158:30 pmIAD - STN

1 stop11h 35mMultiple Airlines

Deal found 8/18

$598

Last-minute flights from Stansted to Dulles Intl
Discover last-minute flight deals from Stansted to Dulles Intl. Data last updated August 20, 2025 and is based on user searches.

Fri 9/512:25 pmSTN - IAD

1 stop11h 30mMultiple Airlines

Tue 9/99:00 pmIAD - STN

1 stop14h 35mMultiple Airlines

Deal found 8/18

$606

Mon 9/84:10 pmSTN - IAD

2 stops32h 49mMultiple Airlines

Thu 9/1110:05 pmIAD - STN

2 stops19h 20mMultiple Airlines

Deal found 8/19

$590

Sat 9/136:35 amSTN - IAD

2 stops18h 24mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/19

$591

Mon 9/151:20 pmSTN - IAD

2 stops35h 39mMultiple Airlines

Sat 9/2010:05 pmIAD - STN

2 stops21h 15mMultiple Airlines

Deal found 8/18

$589

Tue 9/162:50 pmSTN - IAD

2 stops29h 30mMultiple Airlines

Tue 9/2310:20 pmIAD - STN

2 stops20h 50mMultiple Airlines

Deal found 8/19

$596

Wed 9/1710:10 pmSTN - IAD

2 stops27h 40mMultiple Airlines

Wed 9/245:50 pmIAD - STN

2 stops18h 40mMultiple Airlines

Deal found 8/20

$592

Tue 9/232:50 pmSTN - IAD

2 stops35h 00mMultiple Airlines

Mon 10/65:45 pmIAD - STN

2 stops25h 25mMultiple Airlines

Deal found 8/18

$601

Thu 9/255:50 pmSTN - IAD

2 stops26h 30mMultiple Airlines

Wed 10/15:50 pmIAD - STN

2 stops20h 15mMultiple Airlines

Deal found 8/18

$595

Sun 9/289:45 amSTN - IAD

1 stop11h 05mMultiple Airlines

Sun 10/58:25 pmIAD - STN

1 stop11h 30mMultiple Airlines

Deal found 8/18

$609

One-way flights from Stansted to Dulles Intl
Search for one-way flight options from Stansted to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 20, 2025.

Wed 8/2711:10 pmSTN - IAD

3 stops26h 40mMultiple Airlines

Deal found 8/18

$537

Tue 8/266:15 amSTN - IAD

1 stop14h 05mMultiple Airlines

Deal found 8/18

$539

Mon 10/135:25 pmSTN - IAD

1 stop26h 55mMultiple Airlines

Deal found 8/18

$540

Mon 10/65:25 pmSTN - IAD

1 stop26h 55mMultiple Airlines

Deal found 8/20

$542

Fri 9/197:30 amSTN - IAD

1 stop12h 50mMultiple Airlines

Deal found 8/19

$543

Mon 1/127:35 amSTN - IAD

1 stop14h 40mMultiple Airlines

Deal found 8/18

$551

Thu 12/49:55 pmSTN - IAD

3 stops25h 50mMultiple Airlines

Deal found 8/18

$552

Sun 12/148:55 pmSTN - IAD

1 stop25h 20mMultiple Airlines

Deal found 8/19

$553

Sat 8/307:00 amSTN - IAD

2 stops20h 10mMultiple Airlines

Deal found 8/18

$554

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 9/15

1:20 pm-7:59 pm

2 stops35h 39m

Washington, D.C. Dulles Intl

Sat 9/20

10:05 pm-12:20 am

2 stops21h 15m

$589

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 9/8

4:10 pm-7:59 pm

2 stops32h 49m

Washington, D.C. Dulles Intl

Thu 9/11

10:05 pm-10:25 pm

2 stops19h 20m

$590

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 9/13

6:35 am-7:59 pm

2 stops18h 24m

Washington, D.C. Dulles Intl

Sat 9/20

10:05 pm-12:20 am

2 stops21h 15m

$591

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 10/11

10:00 pm-7:59 pm

3 stops26h 59m

Washington, D.C. Dulles Intl

Thu 10/16

10:05 pm-10:25 pm

2 stops19h 20m

$591

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 9/17

10:10 pm-8:50 pm

2 stops27h 40m

Washington, D.C. Dulles Intl

Wed 9/24

5:50 pm-5:30 pm

2 stops18h 40m

$592

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 9/25

5:50 pm-3:20 pm

2 stops26h 30m

Washington, D.C. Dulles Intl

Wed 10/1

5:50 pm-7:05 pm

2 stops20h 15m

$595

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 9/16

2:50 pm-3:20 pm

2 stops29h 30m

Washington, D.C. Dulles Intl

Tue 9/23

10:20 pm-12:10 am

2 stops20h 50m

$596

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 11/8

11:00 am-6:50 pm

1 stop12h 50m

Washington, D.C. Dulles Intl

Sat 11/15

8:30 pm-1:05 pm

1 stop11h 35m

$598

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 8/27

11:10 pm-8:50 pm

3 stops26h 40m

$537

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 9/7

4:40 pm-3:20 pm

2 stops27h 40m

$537

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 17 results

Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Stansted to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.
Can I find deals for business class flights from Stansted to Dulles Intl?
Yes. Cheapflights offers flight deals from Stansted to Dulles Intl 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 London Stansted Airport to Washington, D.C. Dulles Intl Airport?
Currently, July is the cheapest month in which you can book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport (average of $303). Flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Springfield

Fredericksburg

Gaithersburg

Towson

Linthicum Heights

Fairfax

Manassas

Falls Church

Laurel

Rockville

Oxon Hill

National Harbor

Dundalk

Waldorf

Bowie

Browse thousands of different options on Cheapflights for your next trip

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$537+ Cheap flights from Stansted (STN) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Stansted to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Stansted to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Stansted to Dulles Intl

Cheapest flights from Stansted to Dulles IntlExplore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

How can I find direct flights from Stansted to Dulles Intl?

Can I find deals for business class flights from Stansted to Dulles Intl?

What is the cheapest month to book a flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Stansted to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.