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Niagara Falls

$89+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 82 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 February 4, 2026.

This Mytrip deal was found by Cheapflights users on 2/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/148:00 am
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Sat 3/216:15 pm
YYZ
-
SEA
1 stop7h 41m
Air Canada
Deal found 2/4$213
This Trip.com deal was found by Cheapflights users on 2/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:55 am
SEA
-
YYZ
Nonstop4h 40m
Alaska Airlines
Sat 3/214:45 pm
YYZ
-
SEA
Nonstop5h 30m
Alaska Airlines
Deal found 2/4$220
This Trip.com deal was found by Cheapflights users on 2/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:55 am
SEA
-
YYZ
Nonstop4h 40m
Multiple Airlines
Wed 3/117:45 am
YYZ
-
SEA
1 stop9h 34m
Multiple Airlines
Deal found 2/4$229
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:55 am
SEA
-
YYZ
Nonstop4h 40m
Alaska Airlines
Sat 2/284:45 pm
YYZ
-
SEA
Nonstop5h 33m
Alaska Airlines
Deal found 2/2$232
This Air Canada deal was found by Cheapflights users on 2/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:00 am
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Tue 2/245:55 pm
YYZ
-
SEA
1 stop8h 02m
Air Canada
Deal found 2/2$233
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 4/2810:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Wed 5/61:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 2/4$241
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:55 am
SEA
-
YYZ
Nonstop4h 40m
Alaska Airlines
Sun 3/14:45 pm
YYZ
-
SEA
Nonstop5h 33m
Alaska Airlines
Deal found 2/2$242
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 3/113:10 pm
SEA
-
YYZ
2 stops11h 48m
WestJet
Tue 3/177:45 am
YYZ
-
SEA
1 stop9h 34m
WestJet
Deal found 2/2$244
This Mytrip deal was found by Cheapflights users on 2/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/148:00 am
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Sun 3/227:00 am
YYZ
-
SEA
1 stop15h 16m
Air Canada
Deal found 2/2$246
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:55 am
SEA
-
YYZ
Nonstop4h 40m
Multiple Airlines
Tue 3/177:45 am
YYZ
-
SEA
1 stop9h 34m
Multiple Airlines
Deal found 2/2$247

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$213
(Mytrip)

One-way from

$89
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$286
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. 2% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 4, 2026.
Use the filters below to find and compare flights from Seattle to Niagara Falls that are best for you.

Fly from

Seattle

Fly to

Niagara Falls

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 4/28

7:55 am-3:45 pm

Nonstop4h 50m

Toronto Pearson Intl

Tue 5/5

4:55 pm-7:23 pm

Nonstop5h 28m

$231

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 3/14

3:40 pm-5:38 am

2 stops10h 58m

Toronto Pearson Intl

Sat 3/21

7:50 pm-10:16 pm

Nonstop5h 26m

$231

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/4

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Wed 3/11

4:45 pm-7:18 pm

Nonstop5h 33m

$231

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 3/10

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Tue 3/17

4:45 pm-7:18 pm

Nonstop5h 33m

$232

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 3/15

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Sat 3/21

4:45 pm-7:15 pm

Nonstop5h 30m

$242

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/25

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Thu 3/26

4:45 pm-7:15 pm

Nonstop5h 30m

$242

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 2/25

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Sun 3/1

4:45 pm-7:18 pm

Nonstop5h 33m

$242

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 3/12

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Tue 3/17

4:45 pm-7:18 pm

Nonstop5h 33m

$242

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 5/2

5:05 am-3:14 pm

1 stop7h 09m

Toronto Pearson Intl

Sat 5/2

5:16 pm-1:12 am

1 stop10h 56m

$253

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 3/12

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Thu 3/19

4:45 pm-7:15 pm

Nonstop5h 30m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 22 results
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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

How far ahead should I book a flight from Seattle to Niagara Falls?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Niagara Falls. Price data was last updated on January 30, 2026.

The best time to book flights from Seattle to Niagara Falls is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Niagara Falls?

Currently, April is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $125). Flying from Seattle to Niagara Falls in December is currently the most expensive (average of $281). 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 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 February 4, 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 February 4, 2026.

The most flights from SEA to NI4 are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

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 February 4, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United 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
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,839 reviews
Alaska Airlines
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,146 reviews
Alaska Airlines
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,236 reviews
Alaska Airlines
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
WestJet
7.2
Good
3,255 reviews
Alaska Airlines
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Air Canada
7.1
Good
10,688 reviews
Alaska Airlines
8.0
Very good
11,839 reviews

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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?

    Alaska Airlines and Air Canada can get you from Seattle to Niagara Falls in just under 4h 50m. Your travel time can differ by up to 6h 08m. Airlines will cover a distance of 2054 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $83 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Alaska Airlines and Air Canada, with prices starting from $93 and $100, respectively.

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

    Consider Alaska Airlines (82%), Hawaiian Airlines (82%) or Air Tahiti Nui (82%) 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 $1,257, our data shows the cheapest flight currently is $80. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $245 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.

  • What is the cheapest month to book a flight from Seattle to Niagara Falls?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $125). Flying from Seattle to Niagara Falls in December is currently the most expensive (average of $281). 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

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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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$132Average$381FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$160Average$380FlexibilityNo cancel feeOn-time69%
DeltaCheapest$165Average$408FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$226Average$300FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$253Average$434FlexibilityNo cancel feeOn-time75%

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