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Niagara Falls

$112+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Nov 20 — Nov 271
Thu 11/20
Thu 11/27
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 70 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap 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 October 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$227
(SmartFares)

One-way from

$112

Popular in

June

Cheapest in

January

Average price

$366
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
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One-way flight from Seattle/Tacoma Intl to Niagara Falls
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Highest demand for flights based on searches. 9% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 21, 2025.

This SmartFares deal was found by Cheapflights users on 10/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Wed 11/264:45 pmYYZ - SEA
Nonstop5h 32mAlaska Airlines
Deal found 10/21$227
This Trip.com deal was found by Cheapflights users on 10/19. 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.
Wed 12/37:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Wed 12/107:00 amYYZ - SEA
1 stop10h 20mMultiple Airlines
Deal found 10/19$228
This eDestinos deal was found by Cheapflights users on 10/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Tue 11/254:45 pmYYZ - SEA
Nonstop5h 32mAlaska Airlines
Deal found 10/20$231
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 11/187:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Tue 11/257:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 10/19$232
This Trip.com deal was found by Cheapflights users on 10/20. 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.
Wed 12/107:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Sun 12/147:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 10/20$236
This Vliegwinkel deal was found by Cheapflights users on 10/20. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Tue 11/257:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 10/20$237
This FlightHub deal was found by Cheapflights users on 10/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Sun 12/77:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 10/19$238
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/183:10 pmSEA - YYZ
2 stops12h 48mWestJet
Tue 11/257:45 amYYZ - SEA
1 stop9h 35mWestJet
Deal found 10/21$241
This KAYAK deal was found by Cheapflights users on 10/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Fri 11/214:45 pmYYZ - SEA
Nonstop5h 32mAlaska Airlines
Deal found 10/20$242
This Trip.com deal was found by Cheapflights users on 10/19. 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.
Thu 12/43:10 pmSEA - YYZ
2 stops11h 48mWestJet
Thu 12/117:45 amYYZ - SEA
1 stop9h 35mWestJet
Deal found 10/19$243
This Trip.com deal was found by Cheapflights users on 10/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Sat 11/2210:15 pmYYZ - SEA
2 stops15h 07mMultiple Airlines
Deal found 10/18$244

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 October 21, 2025.
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

Wed 12/3

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Wed 12/10

4:45 pm-7:18 pm

Nonstop5h 33m

$251

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 11/18

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Tue 11/25

4:45 pm-7:17 pm

Nonstop5h 32m

$251

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 3/7

8:00 am-3:35 pm

Nonstop4h 35m

Toronto Pearson Intl

Tue 3/10

4:45 pm-7:05 pm

Nonstop5h 20m

$251

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 12/27

8:00 am-3:35 pm

Nonstop4h 35m

Toronto Pearson Intl

Fri 1/9

4:45 pm-7:21 pm

Nonstop5h 36m

$259

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 3/5

8:00 am-3:35 pm

Nonstop4h 35m

Toronto Pearson Intl

Tue 3/10

4:45 pm-7:05 pm

Nonstop5h 20m

$262

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 3/7

8:00 am-3:35 pm

Nonstop4h 35m

Toronto Pearson Intl

Mon 3/9

4:45 pm-7:05 pm

Nonstop5h 20m

$262

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 3/10

8:00 am-3:35 pm

Nonstop4h 35m

Toronto Pearson Intl

Wed 3/11

4:45 pm-7:05 pm

Nonstop5h 20m

$272

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 11/17

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Mon 11/24

4:45 pm-7:17 pm

Nonstop5h 32m

$272

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 12/10

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Sun 12/14

4:45 pm-7:18 pm

Nonstop5h 33m

$272

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 12/4

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Thu 12/11

4:45 pm-7:18 pm

Nonstop5h 33m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 23 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 October 17, 2025.

The best time to book flights from Seattle to Niagara Falls is 70 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, March is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $121). Flying from Seattle to Niagara Falls in November is currently the most expensive (average of $278). 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 October 21, 2025.

It’s typically best to fly out from Seattle to Niagara Falls in the afternoon. Doing so could potentially save you 57% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Seattle to Niagara Falls?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Niagara Falls. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Niagara Falls flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 21, 2025.

The most flights from SEA to NI4 are scheduled on a Wednesday (7 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 October 21, 2025.
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
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,137 reviews
Alaska Airlines
8.0
Very good
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
7,978 reviews
Alaska Airlines
8.0
Very good
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,989 reviews
Alaska Airlines
8.0
Very good
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
WestJet
7.2
Good
3,129 reviews
Alaska Airlines
8.0
Very good
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Air Canada
7.1
Good
10,337 reviews
Alaska Airlines
8.0
Very good
11,137 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 6 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 can get you from Seattle to Niagara Falls in just under 4h 40m. Your travel time will be generally consistent. Airlines will cover a distance of 2054 mi. Generally, flights for this route are nonstop.

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

    Consider Qatar Airways (97%), Alaska Airlines (97%) or Air Tahiti Nui (96%) 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 $1,033, our data shows the cheapest flight currently is $161. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $225 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, March is the cheapest month in which you can book a flight from Seattle to Niagara Falls (average of $121). Flying from Seattle to Niagara Falls in November is currently the most expensive (average of $278). 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.

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Alternative routes for Seattle to Niagara Falls

See prices for flight routes from nearby airports that may be better suited for you.
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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 October 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$157Average$441FlexibilityNo cancel feeOn-time67%
DeltaCheapest$186Average$434FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$226Average$299FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$276Average$487FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$301Average$385FlexibilityNo cancel feeOn-time69%

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