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Niagara Falls

$109+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
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 Friday 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 March 23, 2026.

This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:00 am
SEA
-
YYZ
Nonstop4h 54m
Air Canada
Fri 5/112:30 am
YYZ
-
SEA
2 stops12h 35m
Air Canada
Deal found 3/20$236
This Trip.com deal was found by Cheapflights users on 3/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:00 am
SEA
-
YYZ
Nonstop4h 54m
Multiple Airlines
Sat 5/24:55 pm
YYZ
-
SEA
Nonstop5h 28m
Multiple Airlines
Deal found 3/20$243
This Mytrip deal was found by Cheapflights users on 3/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:00 am
SEA
-
YYZ
Nonstop4h 50m
Air Canada
Fri 5/812:30 am
YYZ
-
SEA
2 stops12h 20m
Air Canada
Deal found 3/18$246
This Trip.com deal was found by Cheapflights users on 3/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:55 am
SEA
-
YYZ
Nonstop4h 50m
Alaska Airlines
Sat 5/24:55 pm
YYZ
-
SEA
Nonstop5h 28m
Alaska Airlines
Deal found 3/19$247
This Booking.com deal was found by Cheapflights users on 3/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:55 pm
SEA
-
YYZ
1 stop7h 43m
Air Canada
Tue 5/126:45 pm
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Deal found 3/21$260
This Mytrip deal was found by Cheapflights users on 3/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:20 pm
SEA
-
YYZ
2 stops9h 50m
Air Canada
Wed 5/136:45 pm
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Deal found 3/21$268

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 March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$236
(Mytrip)

One-way from

$109
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$322
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
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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. 3% potential increase in price ($14 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 March 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 March 23, 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

Thu 5/7

9:35 pm-10:19 am

1 stop9h 44m

Toronto Pearson Intl

Thu 5/14

6:12 pm-10:48 pm

1 stop7h 36m

$323

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 5/5

11:14 pm-8:56 am

1 stop6h 42m

Toronto Pearson Intl

Tue 5/12

5:45 pm-10:03 pm

1 stop7h 18m

$323

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 5/26

8:56 am-9:32 pm

1 stop9h 36m

Toronto Pearson Intl

Tue 6/2

10:45 am-3:55 pm

1 stop8h 10m

$340

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 5/23

7:40 am-11:54 pm

1 stop13h 14m

Toronto Pearson Intl

Tue 5/26

9:00 pm-9:40 am

1 stop15h 40m

$340

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/27

11:59 pm-11:36 am

1 stop8h 37m

Toronto Pearson Intl

Fri 6/5

6:12 pm-10:46 pm

1 stop7h 34m

$351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/27

8:58 am-9:32 pm

1 stop9h 34m

Toronto Pearson Intl

Mon 6/1

5:15 pm-11:59 pm

1 stop9h 44m

$351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/27

11:05 pm-8:59 am

1 stop6h 54m

Toronto Pearson Intl

Sun 5/31

2:20 pm-10:48 pm

1 stop11h 28m

$351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 6/4

5:30 am-5:21 pm

1 stop8h 51m

Toronto Pearson Intl

Mon 6/8

4:10 pm-10:34 pm

1 stop9h 24m

$361

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

5:48 pm-8:56 am

2 stops12h 08m

Toronto Pearson Intl

Sat 5/2

12:22 pm-8:42 pm

1 stop11h 20m

$387

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 4/22

8:00 am-3:54 pm

Nonstop4h 54m

Toronto Pearson Intl

Wed 4/22

7:30 pm-9:53 pm

Nonstop5h 23m

$411

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 March 13, 2026.

The best time to book flights from Seattle to Niagara Falls is 65 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, January is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $132). 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 March 23, 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 March 23, 2026.

The most flights from SEA to NI4 are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 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 March 23, 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
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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
7.9
Good
12,100 reviews
Alaska Airlines
7.9
Good
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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
8,318 reviews
Alaska Airlines
7.9
Good
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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
9,462 reviews
Alaska Airlines
7.9
Good
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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
3,300 reviews
Alaska Airlines
7.9
Good
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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
10,835 reviews
Alaska Airlines
7.9
Good
12,100 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

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 5 flights from Seattle/Tacoma Intl to Niagara Falls per day from 5 different airlines.

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

    Delta and United Airlines can get you from Seattle to Niagara Falls in just under 9h 36m. Your travel time can differ by up to 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?

    $82 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 Qatar Airways (96%), Alaska Airlines (93%) or Hawaiian Airlines (93%) 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 $697, our data shows the cheapest flight currently is $99. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $285 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, January is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $132). 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$138Average$395FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$165Average$387FlexibilityNo cancel feeOn-time67%
WestJetCheapest$222Average$298FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$252Average$431FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$380FlexibilityNo cancel feeOn-time69%

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