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$257+ Cheap flights from Niagara Falls to Seattle (IAG - SEA)

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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAG — SEA
Aug 7 — Aug 141
Fri 8/7
Fri 8/14
1 adult, Economy
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Cheap flight deals from Niagara Falls to Seattle

One-way flights from Niagara Falls to Seattle
Search for one-way flight options from Niagara Falls to Seattle. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/6. 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 9/2410:33 am
IAG
-
SEA
2 stops40h 54m
Multiple Airlines
Deal found 7/6$257
This Kiwi.com deal was found by Cheapflights users on 7/6. 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.
Sun 9/2010:33 am
IAG
-
SEA
2 stops40h 54m
Multiple Airlines
Deal found 7/6$265
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 9/2510:46 am
IAG
-
SEA
3 stops16h 41m
Multiple Airlines
Deal found 7/6$311

Find flight deals from Niagara Falls to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Niagara Falls (IAG) to Seattle (SEA). 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 8, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars
Provider with most accurate pricing for Niagara Falls-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Niagara Falls-Seattle/Tacoma Intl flights.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Niagara Falls to Seattle 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 8, 2026.
Use the filters below to find and compare flights from Niagara Falls to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

Niagara FallsSeattle

IAG - SEA

IAGSEA

Niagara Falls

Thu 9/24

10:33 am-12:27 am

2 stops40h 54m

$257

Niagara FallsSeattle

IAG - SEA

IAGSEA

Niagara Falls

Sun 9/20

10:33 am-12:27 am

2 stops40h 54m

$265
Quickest one-way

Niagara FallsSeattle

IAG - SEA

IAGSEA

Niagara Falls

Fri 9/25

10:46 am-12:27 am

3 stops16h 41m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Niagara Falls-Seattle flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Niagara Falls-Seattle flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Niagara Falls-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Niagara Falls-Seattle 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 Niagara Falls-Seattle 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 Niagara Falls to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Niagara Falls 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 Niagara Falls to Seattle. 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 Niagara Falls to Seattle that include hotel bookings?

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

  • How can I find direct flights from Niagara Falls to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Niagara Falls to Seattle 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Leavenworth
Olympia
Ocean Shores
Edmonds
Snoqualmie
Tumwater
Tukwila
Renton
Kent
Lynnwood
Ellensburg
Fife
Marysville
Lakewood
Issaquah
Shoreline
Centralia

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