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Stewart

$140+ Cheap flights from Seattle to New Windsor (SEA - SWF)

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SWF
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Cheap flight deals from Seattle to Stewart

One-way flights from Seattle to Stewart
Search for one-way flight options from Seattle to Stewart. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:07 pm
SEA
-
SWF
3 stops44h 33m
Multiple Airlines
Deal found 7/19$140
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 am
SEA
-
SWF
3 stops47h 38m
Multiple Airlines
Deal found 7/21$153
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am
SEA
-
SWF
3 stops47h 28m
Multiple Airlines
Deal found 7/20$154
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am
SEA
-
SWF
3 stops48h 23m
Multiple Airlines
Deal found 7/20$170
This Kiwi.com deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:06 pm
SEA
-
SWF
3 stops44h 35m
Multiple Airlines
Deal found 7/18$171
This Kiwi.com deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:41 pm
SEA
-
SWF
3 stops36h 58m
Multiple Airlines
Deal found 7/18$173
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:06 pm
SEA
-
SWF
3 stops38h 04m
Multiple Airlines
Deal found 7/19$174
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:53 pm
SEA
-
SWF
2 stops34h 23m
Multiple Airlines
Deal found 7/22$175
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:41 pm
SEA
-
SWF
3 stops59h 42m
Multiple Airlines
Deal found 7/19$179

Find flight deals from Seattle to Stewart

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Stewart (SWF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 23, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Popular in

December

Cheapest in

October

Average price

$470
Provider with most accurate pricing for Seattle/Tacoma Intl-New Windsor Stewart flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-New Windsor Stewart flights.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Stewart that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
Use the filters below to find and compare flights from Seattle to New Windsor that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Tue 9/29

7:00 am-9:38 am

3 stops47h 38m

$153

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Thu 9/24

7:41 pm-11:39 am

3 stops36h 58m

$175

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Mon 11/16

7:41 pm-11:39 am

2 stops36h 58m

$209

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Mon 8/31

7:06 pm-11:25 am

2 stops37h 19m

$217

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Wed 10/28

7:41 pm-4:49 pm

3 stops42h 08m

$227
Quickest one-way

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Thu 9/10

7:00 am-11:36 am

3 stops25h 36m

$236

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Fri 9/11

9:16 pm-10:16 am

2 stops34h 00m

$245

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Thu 9/17

7:00 am-11:39 am

2 stops49h 39m

$248

SeattleNew Windsor

SEA - SWF

SEASWF

Seattle/Tacoma Intl

Thu 8/13

7:06 pm-11:25 am

2 stops37h 19m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Seattle-New Windsor flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Seattle-New Windsor flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Seattle-New Windsor flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-New Windsor flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-New Windsor flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Stewart

Have a flexible travel schedule? Discover the best time to fly to Stewart from Seattle 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

Find useful and relevant information for your journey from Seattle to Stewart. 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 Seattle to Stewart that include hotel bookings?

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

  • How can I find direct flights from Seattle to Stewart?

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

  • Can I find deals for business class flights from Seattle to Stewart?

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

Traveling to a place near New Windsor?

Book flights to New Windsor if you plan to visit one of these locations
Kingston

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