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Niagara Falls

$160+ Cheap flights from Seattle (SEA) to Niagara Falls, ON, Canada

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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Jul 22 — Jul 291
Wed 7/22
Wed 7/29
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Niagara Falls are usually found in January or February, booked 65 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Niagara Falls

Cheapest flights from Seattle to Niagara Falls
Explore the most affordable flight options available from Seattle to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 22, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Mon 9/287:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Thu 10/11:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/20$340
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Mon 9/287:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Fri 10/21:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/21$341
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 9/137:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Thu 9/171:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/17$342
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 9/87:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Tue 9/151:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/20$344
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Sun 10/187:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Sun 11/17:45 am
YYZ
-
SEA
1 stop8h 35m
WestJet
Deal found 6/22$345
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Fri 9/117:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Sun 9/131:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/18$346
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Sun 10/187:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Sat 10/317:45 am
YYZ
-
SEA
1 stop9h 53m
WestJet
Deal found 6/21$347
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 10/157:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Tue 10/201:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/18$348
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Fri 10/167:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Tue 10/201:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/18$349
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 10/137:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Tue 11/37:45 am
YYZ
-
SEA
1 stop8h 35m
WestJet
Deal found 6/22$352
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 10/137:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Sat 10/317:45 am
YYZ
-
SEA
1 stop9h 53m
WestJet
Deal found 6/21$354
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 10/137:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Tue 10/201:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 6/18$356

Find flight deals from Seattle to Niagara Falls

Keep the following information in mind while searching for Seattle to Niagara Falls flight deals. Data was last updated June 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$340
(Kiwi.com)

One-way from

$160
(oojo)

Popular in

December

Cheapest in

January

Average price

$405
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
Search Deals
From Seattle/Tacoma Intl to Niagara Falls
Search Deals
One-way flight from Seattle/Tacoma Intl to Niagara Falls
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($3 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 June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Niagara Falls 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 June 22, 2026.
Use the filters below to find and compare flights from Seattle to Niagara Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/1

7:00 am-7:40 pm

1 stop9h 40m

Toronto Pearson Intl

Wed 9/9

4:18 pm-9:15 pm

1 stop7h 57m

$485

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 8/18

5:13 pm-9:54 am

1 stop13h 41m

Toronto Pearson Intl

Sun 8/30

6:30 am-11:26 pm

1 stop19h 56m

$496

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 7/8

7:00 am-5:56 pm

1 stop7h 56m

Toronto Pearson Intl

Wed 7/29

11:00 am-4:09 pm

1 stop8h 09m

$496

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 8/21

5:20 pm-7:00 am

1 stop10h 40m

Toronto Pearson Intl

Tue 9/1

1:00 pm-10:43 pm

1 stop12h 43m

$496

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/20

5:20 pm-7:00 am

1 stop10h 40m

Toronto Pearson Intl

Sat 8/29

7:00 am-7:07 pm

1 stop15h 07m

$496

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 8/21

10:58 pm-7:00 pm

1 stop17h 02m

Toronto Pearson Intl

Sat 8/29

8:50 am-7:07 pm

1 stop13h 17m

$496

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 8/21

10:58 pm-7:00 pm

1 stop17h 02m

Toronto Pearson Intl

Wed 9/2

8:50 am-7:08 pm

2 stops13h 18m

$501

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/1

8:59 pm-10:25 am

2 stops10h 26m

Toronto Pearson Intl

Wed 9/9

5:54 pm-10:05 pm

1 stop7h 11m

$511
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 9/21

7:52 am-3:45 pm

Nonstop4h 53m

Toronto Pearson Intl

Tue 9/22

4:55 pm-7:13 pm

Nonstop5h 18m

$532

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 11/10

7:30 am-11:04 pm

2 stops12h 34m

Toronto Pearson Intl

Mon 11/16

12:14 pm-8:50 pm

2 stops11h 36m

$553

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Seattle to Niagara Falls

Have a flexible travel schedule? Discover the best time to fly to Niagara Falls 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Niagara Falls

What is the cheapest time of day to fly from SEA to NI4?

Find hourly flight availability from Seattle to Niagara Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 22, 2026.

When flying from Seattle to Niagara Falls, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Seattle to Niagara Falls

Explore weekly flight availability from Seattle to Niagara Falls. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 22, 2026.

The most flights from SEA to NI4 are scheduled on a Wednesday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Seattle to Niagara Falls?

Reviews of airlines servicing Niagara Falls

Get insights into the airlines that provide service to Niagara Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Niagara Falls. Reviews last updated June 22, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Seattle to Niagara Falls to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Alaska Airlines
7.9
Good
12,561 reviews
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Delta
7.8
Good
8,421 reviews
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
United Airlines
7.4
Good
9,874 reviews
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
WestJet
7.2
Good
3,379 reviews
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Air Canada
7.1
Good
11,239 reviews
Alaska Airlines
7.9
Good
12,561 reviews

Food

7.0

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Niagara Falls. 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 Seattle to Niagara Falls?

    If you book a flight to Niagara Falls from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 4 flights from Seattle/Tacoma Intl to Niagara Falls per day from 5 different airlines.

  • How long is the flight from Seattle to Niagara Falls?

    United Airlines can get you from Seattle to Niagara Falls in just under 9h 40m. Your travel time can differ by up to . Airlines will cover a distance of 2054 mi.

  • What are the cheapest airlines to fly from Seattle to Niagara Falls one-way?

    $80 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on WestJet and Air Canada, with prices starting from $83 and $99, respectively.

  • What are the most reliable airlines from Seattle to Niagara Falls?

    Consider Air Canada (98%), United Airlines (98%) or Brussels Airlines (97%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Niagara Falls.

  • What are the cheapest flights from Seattle to Niagara Falls?

    While on average a flight from Seattle to Niagara Falls is generally $1,032, our data shows the cheapest flight currently is $357. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $373 for that flight.

  • Can I find deals for flights from Seattle to Niagara Falls that include hotel bookings?

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

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

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

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

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

See more FAQs

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.

Top 5 airlines flying from Seattle to Niagara Falls

Discover the top 5 airlines that operate flights from Seattle to Niagara Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$132Average$390FlexibilityNo cancel feeOn-time67%
DeltaCheapest$142Average$413FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$226Average$311FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$250Average$456FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$380FlexibilityNo cancel feeOn-time69%

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