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).

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

To save up to 185% on this flight, we recommend booking at least 27 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from New Windsor to Washington, D.C. Dulles Intl Airport from $279 1-2 weeks out and tickets from $447 for flights departing within the next 72 hours.

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

April is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from New Windsor. Prices for April average $228 per person but you can even find prices for as low as $91. The most expensive prices can be found in the month of December. Opting for a April flight can save you 30% on your journey compared to booking in December

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

When flying from New Windsor 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.

What airport do you fly from for flights from New Windsor to Washington, D.C. Dulles Intl?

For a flight from New Windsor to Washington, D.C. Dulles Intl, you will be flying from Stewart. New Windsor Stewart (SWF) is just 4.3 mi from the center of the city. Stewart is the only New Windsor airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from New Windsor Stewart on a regular basis.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Stewart 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.

$159+ Cheap Flights from New Windsor to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Stewart to Dulles Intl

Round-trip from	$430 (Kiwi.com)
One-way from	$159 (Kiwi.com)
Popular in	December
Cheapest in	April
Average price	$192

From New Windsor Stewart to Washington, D.C. Dulles Intl

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One-way flight from New Windsor Stewart to Washington, D.C. Dulles Intl

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Highest demand for flights based on searches. 19% potential increase in price ($53 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Stewart to Dulles Intl

Cheapest flights from Stewart to Dulles Intl
Explore the most affordable flight options available from Stewart to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Thu 11/611:43 amSWF - IAD

1 stop8h 08mMultiple Airlines

Sat 11/88:36 pmIAD - SWF

1 stop14h 27mMultiple Airlines

Deal found 9/9

$430

Sun 11/211:43 amSWF - IAD

1 stop8h 08mMultiple Airlines

Sat 11/88:36 pmIAD - SWF

1 stop14h 27mMultiple Airlines

Deal found 9/10

$633

Best flights from Stewart to Dulles Intl
Discover carefully curated flight deals from Stewart to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Thu 11/611:43 amSWF - IAD

1 stop8h 08mMultiple Airlines

Sat 11/88:36 pmIAD - SWF

1 stop14h 27mMultiple Airlines

Deal found 9/9

$430

Sun 11/211:43 amSWF - IAD

1 stop8h 08mMultiple Airlines

Sat 11/88:36 pmIAD - SWF

1 stop14h 27mMultiple Airlines

Deal found 9/10

$633

Last-minute flights from Stewart to Dulles Intl
Discover last-minute flight deals from Stewart to Dulles Intl. Data last updated September 11, 2025 and is based on user searches.

Mon 10/273:01 pmSWF - IAD

3 stops20h 22mMultiple Airlines

Mon 11/312:09 pmIAD - SWF

1 stop7h 07mMultiple Airlines

Deal found 9/11

$358

One-way flights from Stewart to Dulles Intl
Search for one-way flight options from Stewart to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 11, 2025.

Thu 10/911:43 amSWF - IAD

1 stop7h 24mMultiple Airlines

Deal found 9/9

$159

Fri 10/2412:24 pmSWF - IAD

2 stops8h 49mMultiple Airlines

Deal found 9/9

$161

Thu 9/257:12 pmSWF - IAD

2 stops20h 41mAllegiant Air

Deal found 9/11

$193

Mon 10/2011:01 amSWF - IAD

2 stops9h 45mAllegiant Air

Deal found 9/10

$217

Sun 10/1911:43 amSWF - IAD

1 stop7h 34mMultiple Airlines

Deal found 9/9

$241

Tue 11/2511:36 amSWF - IAD

3 stops23h 47mMultiple Airlines

Deal found 9/10

$376

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Thu 11/6

11:43 am-7:51 pm

1 stop8h 08m

Washington, D.C. Dulles Intl

Sat 11/8

8:36 pm-11:03 am

1 stop14h 27m

$430

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Sun 11/2

11:43 am-7:51 pm

1 stop8h 08m

Washington, D.C. Dulles Intl

Sat 11/8

8:36 pm-11:03 am

1 stop14h 27m

$633

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Thu 10/9

11:43 am-7:07 pm

1 stop7h 24m

$159

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Fri 10/24

12:24 pm-9:13 pm

2 stops8h 49m

$161

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Thu 9/25

7:12 pm-3:53 pm

2 stops20h 41m

$193

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Mon 10/20

11:01 am-8:46 pm

2 stops9h 45m

$217

New WindsorWashington, D.C.

SWF - IAD

SWFIAD

New Windsor Stewart

Sun 10/19

11:43 am-7:17 pm

1 stop7h 34m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Best time to book a flight from Stewart to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stewart 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.

Cheapflights Insights

Everything you need to know about your flight from New Windsor to Washington, D.C. Dulles Intl Airport

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

Currently, August is the cheapest month in which you can book a flight from New Windsor to Washington, D.C. Dulles Intl Airport (average of $292). Flying from New Windsor 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.

Related info for your journey

What airport do you fly from for flights from New Windsor to Washington, D.C. Dulles Intl?
For a flight from New Windsor to Washington, D.C. Dulles Intl, you will be flying from Stewart. New Windsor Stewart (SWF) is just 4.3 mi from the center of the city. Stewart is the only New Windsor airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from New Windsor Stewart on a regular basis.
Can I find deals for flights from Stewart to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Stewart to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Stewart to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stewart to Dulles Intl.
Can I find deals for business class flights from Stewart to Dulles Intl?
Yes. Cheapflights offers flight deals from Stewart 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 New Windsor to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from New Windsor to Washington, D.C. Dulles Intl Airport (average of $292). Flying from New Windsor 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.

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$159+ Cheap flights from New Windsor (SWF) 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Stewart to Dulles Intl with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Stewart to Dulles Intl

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Find flight deals from Stewart to Dulles Intl

Cheapest flights from Stewart to Dulles IntlExplore the most affordable flight options available from Stewart to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Explore the most affordable flight options available from Stewart to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Stewart to Dulles Intl

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

Cheapflights Insights

Everything you need to know about your flight from New Windsor to Washington, D.C. Dulles Intl Airport

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

Related info for your journey

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

What airport do you fly from for flights from New Windsor to Washington, D.C. Dulles Intl?

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

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

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

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

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

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Cheapest flights from Stewart to Dulles Intl
Explore the most affordable flight options available from Stewart to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.