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Niagara Falls

$184+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
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 16 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 July 22, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 9/2010:30 am
SEA
-
YYZ
2 stops8h 05m
WestJet
Tue 9/291:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/18$378
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 8/2510:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Mon 8/311:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/19$379
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Thu 10/110:30 am
SEA
-
YYZ
1 stop7h 45m
WestJet
Mon 10/121:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/17$380
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 8/237:00 am
SEA
-
YYZ
1 stop8h 55m
WestJet
Tue 9/81:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/18$381
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Mon 8/2410:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Sat 8/292:50 pm
YYZ
-
SEA
1 stop9h 10m
WestJet
Deal found 7/19$382
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Sun 8/237:00 am
SEA
-
YYZ
1 stop8h 55m
WestJet
Thu 8/271:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/19$383
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 8/2510:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Wed 9/23:50 pm
YYZ
-
SEA
1 stop8h 10m
WestJet
Deal found 7/18$384
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 8/237:00 am
SEA
-
YYZ
1 stop8h 55m
WestJet
Wed 9/23:50 pm
YYZ
-
SEA
1 stop8h 10m
WestJet
Deal found 7/17$385
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Mon 8/2410:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Fri 9/41:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 7/18$386
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Wed 8/262:37 pm
SEA
-
YYZ
2 stops27h 13m
Multiple Airlines
Fri 9/41:30 pm
YYZ
-
SEA
1 stop8h 15m
Multiple Airlines
Deal found 7/20$387
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Wed 8/267:06 pm
SEA
-
YYZ
2 stops24h 39m
Multiple Airlines
Tue 9/81:30 pm
YYZ
-
SEA
1 stop8h 15m
Multiple Airlines
Deal found 7/18$388

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 July 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(Kiwi.com)

One-way from

$184
(oojo)

Popular in

August

Cheapest in

January

Average price

$481
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. 18% potential increase in price ($88 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 July 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 July 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 8/11

7:00 am-6:55 pm

1 stop8h 55m

Toronto Pearson Intl

Sun 8/16

8:35 pm-11:04 am

1 stop17h 29m

$450

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 9/3

7:00 am-9:10 pm

2 stops11h 10m

Toronto Pearson Intl

Tue 9/8

12:40 pm-6:45 pm

2 stops9h 05m

$503

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 8/19

9:35 am-11:10 pm

2 stops10h 35m

Toronto Pearson Intl

Tue 8/25

6:10 am-1:35 pm

2 stops10h 25m

$504

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 8/25

9:35 am-11:10 pm

2 stops10h 35m

Toronto Pearson Intl

Sat 8/29

6:10 am-2:55 pm

2 stops11h 45m

$525

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 8/21

10:35 pm-12:23 pm

1 stop10h 48m

Toronto Pearson Intl

Mon 8/24

6:00 am-4:00 pm

1 stop13h 00m

$560
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 9/20

7:52 am-3:45 pm

Nonstop4h 53m

Toronto Pearson Intl

Wed 9/30

4:55 pm-7:13 pm

Nonstop5h 18m

$586

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 8/10

11:00 pm-11:43 am

1 stop9h 43m

Toronto Pearson Intl

Sun 8/16

7:30 am-6:32 pm

1 stop14h 02m

$590

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 9/25

7:52 am-3:45 pm

Nonstop4h 53m

Toronto Pearson Intl

Mon 9/28

4:55 pm-7:13 pm

Nonstop5h 18m

$596

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 9/25

7:52 am-3:45 pm

Nonstop4h 53m

Toronto Pearson Intl

Thu 10/1

4:55 pm-7:13 pm

Nonstop5h 18m

$596

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/6

8:00 am-3:45 pm

Nonstop4h 45m

Toronto Pearson Intl

Mon 10/12

4:55 pm-7:26 pm

Nonstop5h 31m

$617

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/17

Showing 1-10 of 21 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

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 July 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 July 22, 2026.

The most flights from SEA to NI4 are scheduled on a Monday (5 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 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 July 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
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska Airlines
7.9
Good
12,688 reviews
Alaska Airlines
7.9
Good
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Delta
7.8
Good
8,477 reviews
Alaska Airlines
7.9
Good
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
United Airlines
7.4
Good
10,018 reviews
Alaska Airlines
7.9
Good
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
WestJet
7.2
Good
3,411 reviews
Alaska Airlines
7.9
Good
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Air Canada
7.1
Good
11,371 reviews
Alaska Airlines
7.9
Good
12,688 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

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

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

    WestJet and Delta can get you from Seattle to Niagara Falls in just under 10h 35m. Your travel time can differ by up to 35m. 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?

    $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 (97%), United Airlines (97%) or Brussels Airlines (94%) 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 $524, our data shows the cheapest flight currently is $208. When looking at the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl), you can expect to pay $390 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

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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 July 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$132Average$407FlexibilityNo cancel feeOn-time67%
DeltaCheapest$142Average$408FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$226Average$326FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$250Average$464FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$446FlexibilityNo cancel feeOn-time69%

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