$152+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 10 — Apr 171
Round-trip
1 adult, Economy
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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
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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 11, 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 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 stops23h 08m
Multiple Airlines
Mon 4/67:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 4/214:59 pm
STL
- YYZ
1 stop20h 21m
Multiple Airlines
Tue 4/286:30 am
YYZ
- STL
2 stops25h 20m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 stops38h 12m
Multiple Airlines
Wed 5/67:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$390
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/77:00 am
STL
- YYZ
1 stop10h 33m
American Airlines
Tue 4/146:15 am
YYZ
- STL
1 stop10h 45m
American Airlines
Deal found 3/10![American Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 stops23h 08m
Multiple Airlines
Thu 4/97:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/144:59 pm
STL
- YYZ
1 stop20h 17m
Multiple Airlines
Fri 4/1711:15 am
YYZ
- STL
2 stops20h 35m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$401
This American Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 5/212:27 pm
STL
- YYZ
1 stop10h 02m
American Airlines
Sat 5/96:15 am
YYZ
- STL
1 stop8h 48m
American Airlines
Deal found 3/7![American Airlines logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/85:20 pm
YYZ
- STL
2 stops25h 14m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 3/10. 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
Mon 4/67:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 3/9. 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 4/95:51 am
STL
- YYZ
1 stop10h 52m
American Airlines
Wed 4/156:15 am
YYZ
- STL
1 stop8h 48m
American Airlines
Deal found 3/9![American Airlines logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 3/10. 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
Sat 4/43:25 pm
YYZ
- STL
1 stop9h 00m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$416
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 11, 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 11, 2026.
This Delta deal was found by Cheapflights users on 3/9. 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 4/226:48 am
STL
- YYZ
2 stops10h 21m
Delta
Wed 4/2910:00 am
YYZ
- STL
2 stops11h 44m
Delta
Deal found 3/9![Delta logo]()
$540
This United Airlines deal was found by Cheapflights users on 3/9. 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 4/138:21 am
STL
- YYZ
1 stop8h 35m
United Airlines
Wed 4/152:45 pm
YYZ
- STL
1 stop9h 26m
United Airlines
Deal found 3/9![United Airlines logo]()
$552
This Air Canada deal was found by Cheapflights users on 3/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:10 pm
STL
- YYZ
1 stop5h 51m
Air Canada
Mon 8/312:55 pm
YYZ
- STL
Nonstop2h 07m
Air Canada
Deal found 3/6![Air Canada logo]()
$577
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/28:00 am
STL
- YYZ
1 stop6h 46m
United Airlines
Sun 8/27:00 pm
YYZ
- STL
1 stop5h 45m
United Airlines
Deal found 3/7![United Airlines logo]()
$569
This Air Canada deal was found by Cheapflights users on 3/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:05 pm
STL
- YYZ
Nonstop1h 57m
Air Canada
Wed 4/152:10 pm
YYZ
- STL
Nonstop2h 15m
Air Canada
Deal found 3/10![Air Canada logo]()
$580
This Delta deal was found by Cheapflights users on 3/10. 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 3/316:00 am
STL
- YYZ
2 stops10h 49m
Delta
Tue 4/76:00 am
YYZ
- STL
2 stops12h 53m
Delta
Deal found 3/10![Delta logo]()
$581
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Fri 5/225:41 pm
STL
- YYZ
1 stop5h 18m
United Airlines
Mon 5/255:15 pm
YYZ
- STL
1 stop5h 01m
United Airlines
Deal found 3/8![United Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Thu 4/236:30 am
STL
- YYZ
1 stop6h 12m
United Airlines
Thu 4/308:50 am
YYZ
- STL
1 stop6h 42m
United Airlines
Deal found 3/8![United Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Tue 4/79:10 am
STL
- YYZ
1 stop7h 46m
United Airlines
Tue 4/142:10 pm
YYZ
- STL
Nonstop2h 15m
United Airlines
Deal found 3/8![United Airlines logo]()
$603
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Thu 4/237:45 am
STL
- YYZ
1 stop7h 58m
United Airlines
Sun 4/262:10 pm
YYZ
- STL
Nonstop2h 15m
United Airlines
Deal found 3/9![United Airlines logo]()
$603
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated March 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated March 11, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 3/2810:33 am
STL
- YYZ
1 stop9h 56m
American Airlines
Tue 3/314:44 pm
YYZ
- STL
1 stop8h 00m
American Airlines
Deal found 3/7![American Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 stops23h 08m
Multiple Airlines
Mon 4/67:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 stops23h 08m
Multiple Airlines
Thu 4/97:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/85:20 pm
YYZ
- STL
2 stops25h 14m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 3/10. 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
Mon 4/67:10 am
YYZ
- STL
1 stop17h 15m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 3/10. 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
Sat 4/43:25 pm
YYZ
- STL
1 stop9h 00m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/77:00 am
STL
- YYZ
1 stop10h 33m
American Airlines
Tue 4/146:15 am
YYZ
- STL
1 stop10h 45m
American Airlines
Deal found 3/10![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 3/9. 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 4/95:51 am
STL
- YYZ
1 stop10h 52m
American Airlines
Wed 4/156:15 am
YYZ
- STL
1 stop8h 48m
American Airlines
Deal found 3/9![American Airlines logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/144:59 pm
STL
- YYZ
1 stop20h 17m
Multiple Airlines
Fri 4/1711:15 am
YYZ
- STL
2 stops20h 35m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 4/214:59 pm
STL
- YYZ
1 stop20h 21m
Multiple Airlines
Tue 4/286:30 am
YYZ
- STL
2 stops25h 20m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 stops38h 12m
Multiple Airlines
Wed 5/67:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$390
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 11, 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 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/208:23 pm
STL
- YYZ
2 stops16h 42m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$152
This American Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/215:51 am
STL
- YYZ
1 stop7h 42m
American Airlines
Deal found 3/9![American Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/118:13 pm
STL
- YYZ
2 stops38h 22m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 stops24h 06m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/711:21 am
STL
- YYZ
3 stops32h 03m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$172
This American Airlines deal was found by Cheapflights users on 3/6. 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 5/75:51 am
STL
- YYZ
1 stop10h 49m
American Airlines
Deal found 3/6![American Airlines logo]()
$187
This American Airlines deal was found by Cheapflights users on 3/9. 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 4/237:05 am
STL
- YYZ
1 stop9h 38m
American Airlines
Deal found 3/9![American Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/2311:25 am
STL
- YYZ
2 stops35h 05m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$191
This American Airlines deal was found by Cheapflights users on 3/10. 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 4/95:51 am
STL
- YYZ
1 stop10h 52m
American Airlines
Deal found 3/10![American Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 6/49:50 am
STL
- YYZ
2 stops11h 05m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$201
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 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $386 (Kiwi.com) |
One-way from | $168 (American Airlines) |
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 11, 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
Wed 4/22
6:48 am-6:09 pm
2 stops10h 21m
Toronto Pearson Intl
Wed 4/29
10:00 am-8:44 pm
2 stops11h 44m
$540
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 4/13
8:21 am-5:56 pm
1 stop8h 35m
Toronto Pearson Intl
Wed 4/15
2:45 pm-11:11 pm
1 stop9h 26m
$552
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 8/2
8:00 am-3:46 pm
1 stop6h 46m
Toronto Pearson Intl
Sun 8/2
7:00 pm-11:45 pm
1 stop5h 45m
$569
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 7/31
12:10 pm-7:01 pm
1 stop5h 51m
Toronto Pearson Intl
Mon 8/3
12:55 pm-2:02 pm
Nonstop2h 07m
$577
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 4/13
4:05 pm-7:02 pm
Nonstop1h 57m
Toronto Pearson Intl
Wed 4/15
2:10 pm-3:25 pm
Nonstop2h 15m
$580
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 3/31
6:00 am-5:49 pm
2 stops10h 49m
Toronto Pearson Intl
Tue 4/7
6:00 am-5:53 pm
2 stops12h 53m
$581
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 5/22
5:41 pm-11:59 pm
1 stop5h 18m
Toronto Pearson Intl
Mon 5/25
5:15 pm-9:16 pm
1 stop5h 01m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 4/23
6:30 am-1:42 pm
1 stop6h 12m
Toronto Pearson Intl
Thu 4/30
8:50 am-2:32 pm
1 stop6h 42m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 4/7
9:10 am-5:56 pm
1 stop7h 46m
Toronto Pearson Intl
Tue 4/14
2:10 pm-3:25 pm
Nonstop2h 15m
$603
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 4/23
7:45 am-4:43 pm
1 stop7h 58m
Toronto Pearson Intl
Sun 4/26
2:10 pm-3:25 pm
Nonstop2h 15m
$603
Showing 1-10 of 20 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 11, 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 11, 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).
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 11, 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.
Entertainment
7.1
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Boarding
7.7
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.
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Complete your trip
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St. Louis and Niagara Falls flights
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Other flights from St. Louis
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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 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$448 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$220 | Average$537 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$270 | Average$558 | FlexibilityNo cancel fee | On-time71% |