$179+ Cheap flights from St. Louis (STL) 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 21 — Apr 281
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis 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.Cheap flight deals from St. Louis to Niagara Falls
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to Niagara FallsExplore the most affordable flight options available from St. Louis to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.
Explore the most affordable flight options available from St. Louis to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:54 pm
STL
- YYZ
1 stop20h 26m
Multiple Airlines
Wed 4/83:40 pm
YYZ
- STL
2 stops26h 54m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$440
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:51 am
STL
- YYZ
1 stop7h 42m
American Airlines
Tue 4/2811:33 am
YYZ
- STL
1 stop11h 46m
American Airlines
Deal found 3/17![American Airlines logo]()
$458
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Sun 5/32:15 pm
YYZ
- STL
1 stop7h 29m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:51 am
STL
- YYZ
1 stop7h 42m
American Airlines
Wed 4/1511:33 am
YYZ
- STL
1 stop11h 44m
American Airlines
Deal found 3/17![American Airlines logo]()
$466
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/289:50 am
STL
- YYZ
2 stops11h 05m
Multiple Airlines
Sun 5/314:50 pm
YYZ
- STL
1 stop8h 31m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$472
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:59 pm
STL
- YYZ
1 stop20h 21m
Multiple Airlines
Fri 4/108:00 pm
YYZ
- STL
2 stops14h 48m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/96:29 pm
STL
- YYZ
2 stops18h 51m
Multiple Airlines
Sun 4/126:20 am
YYZ
- STL
1 stop4h 26m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$481
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/127:05 am
STL
- YYZ
1 stop6h 28m
American Airlines
Wed 4/156:15 am
YYZ
- STL
1 stop10h 45m
American Airlines
Deal found 3/20![American Airlines logo]()
$485
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Fri 4/248:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Sun 4/266:27 pm
YYZ
- STL
1 stop15h 03m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$486
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/124:59 pm
STL
- YYZ
1 stop17h 27m
Multiple Airlines
Wed 4/156:30 am
YYZ
- STL
2 stops29h 00m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$488
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Mon 5/111:45 pm
YYZ
- STL
1 stop29h 21m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$491
Best flights from St. Louis to Niagara FallsDiscover carefully curated flight deals from St. Louis to Niagara Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 22, 2026.
Discover carefully curated flight deals from St. Louis to Niagara Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 22, 2026.
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 am
STL
- YYZ
1 stop5h 19m
WestJet
Mon 5/116:12 pm
YYZ
- STL
1 stop3h 57m
WestJet
Deal found 3/21![WestJet logo]()
$517
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:51 am
STL
- YYZ
1 stop5h 44m
American Airlines
Sun 4/266:15 am
YYZ
- STL
1 stop8h 48m
American Airlines
Deal found 3/21![American Airlines logo]()
$544
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:45 am
STL
- YYZ
1 stop4h 57m
United Airlines
Wed 4/151:00 pm
YYZ
- STL
1 stop7h 31m
United Airlines
Deal found 3/18![United Airlines logo]()
$549
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:45 am
STL
- YYZ
2 stops10h 08m
Delta
Tue 9/226:15 am
YYZ
- STL
1 stop10h 28m
Delta
Deal found 3/19![Delta logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 6/229:50 am
STL
- YYZ
2 stops11h 05m
Multiple Airlines
Wed 6/247:45 am
YYZ
- STL
1 stop17h 29m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$608
This FlightHub deal was found by Cheapflights users on 3/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:30 pm
STL
- YYZ
1 stop5h 34m
WestJet
Sun 8/26:15 am
YYZ
- STL
1 stop7h 39m
WestJet
Deal found 3/17![WestJet logo]()
$568
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:45 am
STL
- YYZ
1 stop4h 57m
United Airlines
Fri 4/102:10 pm
YYZ
- STL
Nonstop2h 15m
United Airlines
Deal found 3/18![United Airlines logo]()
$608
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/127:45 am
STL
- YYZ
1 stop7h 01m
United Airlines
Wed 4/152:10 pm
YYZ
- STL
Nonstop2h 15m
United Airlines
Deal found 3/18![United Airlines logo]()
$608
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated March 22, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated March 22, 2026 and is based on user searches.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:54 pm
STL
- YYZ
1 stop20h 26m
Multiple Airlines
Wed 4/83:40 pm
YYZ
- STL
2 stops26h 54m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$440
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/84:59 pm
STL
- YYZ
1 stop20h 21m
Multiple Airlines
Fri 4/108:00 pm
YYZ
- STL
2 stops14h 48m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/96:29 pm
STL
- YYZ
2 stops18h 51m
Multiple Airlines
Sun 4/126:20 am
YYZ
- STL
1 stop4h 26m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$481
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/127:05 am
STL
- YYZ
1 stop6h 28m
American Airlines
Wed 4/156:15 am
YYZ
- STL
1 stop10h 45m
American Airlines
Deal found 3/20![American Airlines logo]()
$485
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/124:59 pm
STL
- YYZ
1 stop17h 27m
Multiple Airlines
Wed 4/156:30 am
YYZ
- STL
2 stops29h 00m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$488
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:51 am
STL
- YYZ
1 stop7h 42m
American Airlines
Wed 4/1511:33 am
YYZ
- STL
1 stop11h 44m
American Airlines
Deal found 3/17![American Airlines logo]()
$466
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:05 am
STL
- YYZ
1 stop9h 38m
American Airlines
Mon 4/2011:33 am
YYZ
- STL
1 stop13h 13m
American Airlines
Deal found 3/20![American Airlines logo]()
$496
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:16 pm
STL
- YYZ
1 stop13h 04m
Multiple Airlines
Sat 4/258:20 pm
YYZ
- STL
2 stops35h 30m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$492
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Fri 4/248:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Sun 4/266:27 pm
YYZ
- STL
1 stop15h 03m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$486
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:51 am
STL
- YYZ
1 stop7h 42m
American Airlines
Tue 4/2811:33 am
YYZ
- STL
1 stop11h 46m
American Airlines
Deal found 3/17![American Airlines logo]()
$458
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Sun 5/32:15 pm
YYZ
- STL
1 stop7h 29m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$464
One-way flights from St. Louis to Niagara FallsSearch for one-way flight options from St. Louis to Niagara Falls. Find affordable one-way fares based on user searches. Data last updated March 22, 2026.
Search for one-way flight options from St. Louis to Niagara Falls. Find affordable one-way fares based on user searches. Data last updated March 22, 2026.
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:23 pm
STL
- YYZ
2 stops40h 42m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Tue 3/3111:27 am
STL
- YYZ
2 stops32h 52m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$182
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/18:16 pm
STL
- YYZ
2 stops17h 04m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$195
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
- YYZ
2 stops17h 04m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Fri 5/18:23 pm
STL
- YYZ
2 stops38h 12m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$204
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:55 pm
STL
- YYZ
2 stops42h 10m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$205
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:23 pm
STL
- YYZ
2 stops24h 42m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$207
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:54 am
STL
- YYZ
1 stop7h 49m
American Airlines
Deal found 3/20![American Airlines logo]()
$217
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:59 pm
STL
- YYZ
3 stops44h 54m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$231
Find flight deals from St. Louis to Niagara Falls
Keep the following information in mind while searching for St. Louis to Niagara Falls flight deals. Data was last updated March 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $440 (Kiwi.com) |
One-way from | $179 (Kiwi.com) |
Popular in | January |
Cheapest in | March |
Average price | $310 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 22, 2026.
Use the filters below to find and compare flights from St. Louis to Niagara Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 5/4
6:00 am-12:19 pm
1 stop5h 19m
Toronto Pearson Intl
Mon 5/11
6:12 pm-9:09 pm
1 stop3h 57m
$517
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 4/19
5:51 am-12:35 pm
1 stop5h 44m
Toronto Pearson Intl
Sun 4/26
6:15 am-2:03 pm
1 stop8h 48m
$544
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 4/13
7:45 am-1:42 pm
1 stop4h 57m
Toronto Pearson Intl
Wed 4/15
1:00 pm-7:31 pm
1 stop7h 31m
$549
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 7/30
5:30 pm-12:04 am
1 stop5h 34m
Toronto Pearson Intl
Sun 8/2
6:15 am-12:54 pm
1 stop7h 39m
$568
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 9/16
6:45 am-5:53 pm
2 stops10h 08m
Toronto Pearson Intl
Tue 9/22
6:15 am-3:43 pm
1 stop10h 28m
$586
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 6/22
9:50 am-9:55 pm
2 stops11h 05m
Toronto Pearson Intl
Wed 6/24
7:45 am-12:14 am
1 stop17h 29m
$608
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 4/8
7:45 am-1:42 pm
1 stop4h 57m
Toronto Pearson Intl
Fri 4/10
2:10 pm-3:25 pm
Nonstop2h 15m
$608
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 4/12
7:45 am-3:46 pm
1 stop7h 01m
Toronto Pearson Intl
Wed 4/15
2:10 pm-3:25 pm
Nonstop2h 15m
$608
Cheapest one-way
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 5/7
3:33 pm-5:09 pm
3 stops24h 36m
$221
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 5/3
4:59 pm-8:00 pm
2 stops50h 01m
$232
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Niagara Falls
Have a flexible travel schedule? Discover the best time to fly to Niagara Falls from St. Louis with our price prediction graph.
STL-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 St. Louis to Niagara Falls
STL-NI4
STL-YYZ
What is the cheapest month to book a flight from St. Louis to Niagara Falls?
Currently, June is the cheapest month in which you can book a flight from St. Louis to Niagara Falls (average of $177). Flying from St. Louis to Niagara Falls in January is currently the most expensive (average of $781). 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 STL to NI4?
Find hourly flight availability from St. Louis 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 22, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Niagara Falls as you normally would.
Weekly flight availability from St. Louis to Niagara Falls
Explore weekly flight availability from St. Louis 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 22, 2026.
The most flights from STL to NI4 are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from St. Louis 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 22, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andAir Canada from St. Louis to Niagara Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Food
6.6
Entertainment
7.1
Crew
8.1
Boarding
7.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Food
6.6
Entertainment
7.1
Crew
8.1
Boarding
7.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Food
6.6
Entertainment
7.1
Crew
8.1
Boarding
7.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Food
6.6
Entertainment
7.1
Crew
8.1
Boarding
7.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Related info for your journey
Find useful and relevant information for your journey from St. Louis 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 St. Louis
Popular flights
Top destinations
Alternative routes for St. Louis 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 St. Louis to Niagara Falls by cabin class
Find flights from St. Louis to Niagara Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Niagara Falls flights
Browse other St. Louis and Niagara Falls flight options. Last updated on March 22, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on March 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Niagara Falls flights
Consider these flights traveling from St. Louis to Niagara Falls.
Top 3 airlines flying from St. Louis to Niagara Falls
Discover the top 3 airlines that operate flights from St. Louis 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 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$448 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$220 | Average$549 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$270 | Average$558 | FlexibilityNo cancel fee | On-time71% |