$186+ Cheap flights from Seattle (SEA) to Niagara Falls, 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Sep 20 — Sep 271
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Niagara Falls with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Niagara Falls are usually found in January or February, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Thursday
Cheap flight deals from Seattle to Niagara Falls
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Niagara FallsExplore 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 August 21, 2026.
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 August 21, 2026.
This Justfly.com deal was found by Cheapflights users on 8/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/410:30 am -
1 stop7h 45m
Mon 10/1210:50 am -
1 stop10h 55m
Deal found 8/16![WestJet logo]()
$370
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Sat 9/197:35 pm -
1 stop8h 20m
Sun 10/410:20 pm -
2 stops14h 20m
Deal found 8/16![WestJet logo]()
$372
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:35 pm -
1 stop14h 20m
Sun 9/2710:25 pm -
1 stop14h 15m
Deal found 8/18![WestJet logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Sat 8/2910:30 am -
1 stop7h 45m
Tue 9/2212:00 pm -
1 stop9h 45m
Deal found 8/16![WestJet logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 8/307:00 am -
1 stop8h 55m
Sat 9/512:00 pm -
1 stop9h 45m
Deal found 8/17![WestJet logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/27:35 pm -
1 stop7h 10m
Sat 10/1011:10 pm -
2 stops13h 30m
Deal found 8/16![WestJet logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/47:00 am -
2 stops11h 35m
Fri 9/1810:25 pm -
1 stop14h 15m
Deal found 8/16![WestJet logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Thu 9/2410:30 am -
2 stops10h 40m
Mon 9/2812:00 pm -
1 stop9h 45m
Deal found 8/20![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Fri 11/132:30 pm -
1 stop17h 25m
Tue 11/247:30 am -
1 stop9h 10m
Deal found 8/19![WestJet logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 11/152:30 pm -
1 stop17h 25m
Tue 11/247:30 am -
1 stop9h 10m
Deal found 8/19![WestJet logo]()
$381
This Justfly.com deal was found by Cheapflights users on 8/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:35 pm -
1 stop7h 10m
Mon 9/2110:25 pm -
1 stop23h 20m
Deal found 8/20![WestJet logo]()
$382
Best flights from Seattle to Niagara FallsDiscover carefully curated flight deals from Seattle to Niagara Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
Discover carefully curated flight deals from Seattle to Niagara Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 am -
Nonstop4h 45m
Wed 10/214:55 pm -
Nonstop5h 31m
Deal found 8/18![Alaska Airlines logo]()
$503
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:00 am -
1 stop8h 20m
Tue 11/176:30 am -
2 stops11h 55m
Deal found 8/19![Delta logo]()
$550
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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 11/108:19 am -
Nonstop4h 46m
Mon 11/165:15 pm -
Nonstop5h 30m
Deal found 8/16![Alaska Airlines logo]()
$525
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:36 am -
2 stops10h 39m
Sat 10/246:00 am -
2 stops10h 39m
Deal found 8/18![Delta logo]()
$568
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:19 am -
Nonstop4h 46m
Mon 11/165:15 pm -
Nonstop5h 30m
Deal found 8/17![Alaska Airlines logo]()
$525
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:20 am -
1 stop11h 39m
Fri 10/96:15 am -
1 stop13h 01m
Deal found 8/18![Delta logo]()
$572
This Alaska Airlines deal was found by Cheapflights users on 8/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:00 am -
Nonstop4h 45m
Wed 10/214:55 pm -
Nonstop5h 31m
Deal found 8/18![Alaska Airlines logo]()
$557
This Alaska Airlines deal was found by Cheapflights users on 8/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 am -
Nonstop4h 45m
Mon 10/194:55 pm -
Nonstop5h 31m
Deal found 8/18![Alaska Airlines logo]()
$557
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:52 am -
Nonstop4h 53m
Tue 9/294:55 pm -
Nonstop5h 18m
Deal found 8/17![Alaska Airlines logo]()
$593
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:19 am -
Nonstop4h 46m
Wed 11/255:15 pm -
Nonstop5h 32m
Deal found 8/19![Alaska Airlines logo]()
$608
Last-minute flights from Seattle to Niagara FallsDiscover last-minute flight deals from Seattle to Niagara Falls. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Niagara Falls. Data last updated August 21, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Sat 8/2910:30 am -
1 stop7h 45m
Tue 9/2212:00 pm -
1 stop9h 45m
Deal found 8/16![WestJet logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 8/307:00 am -
1 stop8h 55m
Sat 9/512:00 pm -
1 stop9h 45m
Deal found 8/17![WestJet logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 8/3010:30 am -
1 stop7h 45m
Tue 9/1512:00 pm -
1 stop9h 45m
Deal found 8/17![WestJet logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/47:00 am -
2 stops11h 35m
Fri 9/1810:25 pm -
1 stop14h 15m
Deal found 8/16![WestJet logo]()
$377
This Justfly.com deal was found by Cheapflights users on 8/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:30 am -
2 stops8h 05m
Tue 10/1312:40 pm -
2 stops9h 05m
Deal found 8/19![WestJet logo]()
$381
This Trip.com deal was found by Cheapflights users on 8/19. 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.
Fri 9/117:35 pm -
2 stops16h 45m
Wed 9/1612:40 pm -
2 stops9h 05m
Deal found 8/19![WestJet logo]()
$376
This Justfly.com deal was found by Cheapflights users on 8/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:35 pm -
1 stop7h 10m
Mon 9/2110:25 pm -
1 stop23h 20m
Deal found 8/20![WestJet logo]()
$382
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:35 pm -
1 stop14h 20m
Sun 9/2710:25 pm -
1 stop14h 15m
Deal found 8/18![WestJet logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Thu 9/177:35 pm -
1 stop7h 10m
Mon 9/2811:10 pm -
2 stops13h 30m
Deal found 8/20![WestJet logo]()
$380
This FlightHub deal was found by Cheapflights users on 8/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:35 pm -
1 stop7h 10m
Thu 9/241:30 pm -
1 stop23h 10m
Deal found 8/20![WestJet logo]()
$384
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Sat 9/197:35 pm -
1 stop8h 20m
Sun 10/410:20 pm -
2 stops14h 20m
Deal found 8/16![WestJet logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Thu 9/2410:30 am -
2 stops10h 40m
Mon 9/2812:00 pm -
1 stop9h 45m
Deal found 8/20![Multiple Airlines logo]()
$378
One-way flights from Seattle to Niagara FallsSearch for one-way flight options from Seattle to Niagara Falls. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
Search for one-way flight options from Seattle to Niagara Falls. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
This Justfly.com deal was found by Cheapflights users on 8/21. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am -
1 stop26h 55m
Deal found 8/21![WestJet logo]()
$186
This Trip.com deal was found by Cheapflights users on 8/18. 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.
Tue 12/155:57 pm -
1 stop27h 08m
Deal found 8/18![Multiple Airlines logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Thu 9/2410:30 am -
3 stops27h 48m
Deal found 8/19![Multiple Airlines logo]()
$190
This FlightHub deal was found by Cheapflights users on 8/19. 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.
Wed 11/112:30 pm -
1 stop11h 30m
Deal found 8/19![WestJet logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/2410:30 am -
3 stops32h 05m
Deal found 8/18![WestJet logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/217:35 pm -
2 stops14h 10m
Deal found 8/20![WestJet logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/610:30 am -
1 stop17h 25m
Deal found 8/19![WestJet logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/810:30 am -
2 stops23h 25m
Deal found 8/20![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Thu 10/17:35 pm -
1 stop7h 10m
Deal found 8/20![WestJet logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/1710:30 am -
1 stop23h 25m
Deal found 8/18![WestJet logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Fri 1/82:30 pm -
2 stops12h 15m
Deal found 8/20![WestJet logo]()
$200
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 August 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $370 (Justfly.com) |
One-way from | $186 (Justfly.com) |
Popular in | December |
Cheapest in | January |
Average price | $511 |
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 7,457,451 searches. Data last updated August 21, 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
Cheapest round-trip
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sat 10/17
8:00 am-3:45 pm
Nonstop4h 45m
Toronto Pearson Intl
Wed 10/21
4:55 pm-7:26 pm
Nonstop5h 31m
$503
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Tue 11/10
8:19 am-4:05 pm
Nonstop4h 46m
Toronto Pearson Intl
Mon 11/16
5:15 pm-7:45 pm
Nonstop5h 30m
$525
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Wed 11/11
8:19 am-4:05 pm
Nonstop4h 46m
Toronto Pearson Intl
Mon 11/16
5:15 pm-7:45 pm
Nonstop5h 30m
$525
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sat 11/14
6:00 am-5:20 pm
1 stop8h 20m
Toronto Pearson Intl
Tue 11/17
6:30 am-3:25 pm
2 stops11h 55m
$550
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 10/16
8:00 am-3:45 pm
Nonstop4h 45m
Toronto Pearson Intl
Wed 10/21
4:55 pm-7:26 pm
Nonstop5h 31m
$557
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sat 10/17
8:00 am-3:45 pm
Nonstop4h 45m
Toronto Pearson Intl
Mon 10/19
4:55 pm-7:26 pm
Nonstop5h 31m
$557
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Tue 10/20
9:36 am-11:15 pm
2 stops10h 39m
Toronto Pearson Intl
Sat 10/24
6:00 am-1:39 pm
2 stops10h 39m
$568
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sun 9/27
7:20 am-9:59 pm
1 stop11h 39m
Toronto Pearson Intl
Fri 10/9
6:15 am-4:16 pm
1 stop13h 01m
$572
Quickest round-trip
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Wed 9/23
7:52 am-3:45 pm
Nonstop4h 53m
Toronto Pearson Intl
Tue 9/29
4:55 pm-7:13 pm
Nonstop5h 18m
$593
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sun 11/15
8:19 am-4:05 pm
Nonstop4h 46m
Toronto Pearson Intl
Wed 11/25
5:15 pm-7:47 pm
Nonstop5h 32m
$608
Showing 1-10 of 17 resultsSorted by cheapest first
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.
SEA-YYZ
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
SEA-NI4
SEA-YYZ
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 August 21, 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 August 21, 2026.
The most flights from SEA to NI4 are scheduled on a Monday (5 on average). You will have fewer flight options on Saturday, 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?
Airfare is below average for this route at the moment.
Seattle to Niagara Falls flights typically cost between $376 and $716 in October.The cheapest round-trip price found within the last 5 days was $370 on WestJet (Oct 4-Oct 12).
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 August 21, 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.
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Boarding
8.1
Overall
7.9
Entertainment
7.0
Food
7.0
Crew
8.5
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Top destinations
Alternative routes for Seattle to Niagara Falls
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Niagara Falls by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Niagara Falls by cabin class
Find flights from Seattle to Niagara Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Niagara Falls flights
Browse other Seattle and Niagara Falls flight options. Last updated on August 21, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Niagara Falls flights
Consider these flights traveling from Seattle to Niagara Falls.
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 7,457,451 searches. Data last updated August 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$419 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$132 | Average$414 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$226 | Average$362 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$250 | Average$445 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$277 | Average$519 | FlexibilityNo cancel fee | On-time69% |