$163+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Jul 30 — Aug 61
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
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
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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 June 30, 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 June 30, 2026.
This American Airlines deal was found by Cheapflights users on 6/28. 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.
Wed 9/167:21 am
STL
- YYZ
1 stop10h 14m
American Airlines
Sat 9/196:30 am
YYZ
- STL
1 stop15h 14m
American Airlines
Deal found 6/28![American Airlines logo]()
$384
This American Airlines deal was found by Cheapflights users on 6/27. 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 8/259:32 am
STL
- YYZ
1 stop7h 58m
American Airlines
Tue 9/811:39 am
YYZ
- STL
1 stop8h 48m
American Airlines
Deal found 6/27![American Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 8/246:17 pm
STL
- YYZ
2 stops18h 48m
Multiple Airlines
Sun 10/44:50 pm
YYZ
- STL
1 stop27h 49m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$403
This American Airlines deal was found by Cheapflights users on 6/29. 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 7/216:55 am
STL
- YYZ
1 stop9h 39m
American Airlines
Tue 7/281:17 pm
YYZ
- STL
1 stop11h 59m
American Airlines
Deal found 6/29![American Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/2810:35 am
STL
- YYZ
2 stops29h 20m
Multiple Airlines
Mon 10/57:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$418
This American Airlines deal was found by Cheapflights users on 6/29. 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 10/15:00 am
STL
- YYZ
1 stop8h 32m
American Airlines
Wed 12/24:44 pm
YYZ
- STL
1 stop8h 14m
American Airlines
Deal found 6/29![American Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/1310:35 am
STL
- YYZ
2 stops33h 20m
Multiple Airlines
Mon 9/217:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/1410:35 am
STL
- YYZ
2 stops29h 20m
Multiple Airlines
Mon 9/217:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$424
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/294:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
Sun 8/24:45 pm
YYZ
- STL
2 stops21h 36m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 9/108:34 pm
STL
- YYZ
1 stop19h 11m
Multiple Airlines
Mon 9/141:30 pm
YYZ
- STL
2 stops21h 10m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/3010:35 am
STL
- YYZ
2 stops33h 20m
Multiple Airlines
Mon 10/57:45 am
YYZ
- STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$430
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 June 30, 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 June 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 7/314:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Thu 8/67:45 am
YYZ
- STL
1 stop5h 01m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$480
This United Airlines deal was found by Cheapflights users on 6/28. 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 10/118:30 am
STL
- YYZ
1 stop4h 49m
United Airlines
Sun 10/115:27 pm
YYZ
- STL
1 stop4h 54m
United Airlines
Deal found 6/28![United Airlines logo]()
$581
This Delta deal was found by Cheapflights users on 6/28. 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.
Fri 9/186:40 am
STL
- YYZ
1 stop7h 35m
Delta
Mon 9/216:59 pm
YYZ
- STL
1 stop14h 07m
Delta
Deal found 6/28![Delta logo]()
$594
This Air Canada deal was found by Cheapflights users on 6/27. 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.
Tue 8/258:55 am
STL
- YYZ
Nonstop2h 01m
Air Canada
Tue 9/812:55 pm
YYZ
- STL
Nonstop2h 05m
Air Canada
Deal found 6/27![Air Canada logo]()
$594
This United deal was found by Cheapflights users on 6/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:00 am
STL
- YYZ
1 stop4h 42m
Multiple Airlines
Wed 12/22:10 pm
YYZ
- STL
Nonstop2h 16m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$583
This Delta deal was found by Cheapflights users on 6/28. 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 9/136:40 am
STL
- YYZ
1 stop3h 38m
Delta
Wed 9/167:55 am
YYZ
- STL
1 stop8h 41m
Delta
Deal found 6/28![Delta logo]()
$594
This Air Canada deal was found by Cheapflights users on 6/29. 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 8/1412:10 pm
STL
- YYZ
1 stop5h 51m
Air Canada
Fri 8/217:15 pm
YYZ
- STL
Nonstop2h 09m
Air Canada
Deal found 6/29![Air Canada logo]()
$616
This Delta deal was found by Cheapflights users on 6/29. 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 9/166:40 am
STL
- YYZ
2 stops10h 29m
Delta
Sat 9/197:55 am
YYZ
- STL
1 stop9h 57m
Delta
Deal found 6/29![Delta logo]()
$594
This United deal was found by Cheapflights users on 6/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:30 pm
STL
- YYZ
1 stop5h 29m
Multiple Airlines
Mon 9/72:00 pm
YYZ
- STL
1 stop5h 42m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$594
This United deal was found by Cheapflights users on 6/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:30 pm
STL
- YYZ
1 stop5h 29m
Multiple Airlines
Sun 9/612:55 pm
YYZ
- STL
Nonstop2h 07m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$599
This United deal was found by Cheapflights users on 6/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:30 pm
STL
- YYZ
1 stop5h 29m
Multiple Airlines
Tue 8/1812:55 pm
YYZ
- STL
Nonstop2h 07m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$613
This United deal was found by Cheapflights users on 6/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:20 am
STL
- YYZ
1 stop7h 26m
Multiple Airlines
Wed 7/2912:55 pm
YYZ
- STL
Nonstop2h 07m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$618
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated June 30, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated June 30, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/29. 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 7/216:55 am
STL
- YYZ
1 stop9h 39m
American Airlines
Tue 7/281:17 pm
YYZ
- STL
1 stop11h 59m
American Airlines
Deal found 6/29![American Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/224:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
Fri 7/3112:55 pm
YYZ
- STL
2 stops53h 42m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/227:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
Sat 7/253:20 pm
YYZ
- STL
2 stops27h 17m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$491
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/244:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Fri 7/316:10 am
YYZ
- STL
1 stop4h 21m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$495
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/274:09 pm
STL
- YYZ
1 stop26h 56m
Multiple Airlines
Mon 8/34:45 pm
YYZ
- STL
2 stops21h 36m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$485
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 7/284:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
Tue 8/47:25 am
YYZ
- STL
2 stops11h 12m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/294:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
Sun 8/24:45 pm
YYZ
- STL
2 stops21h 36m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 7/314:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Thu 8/67:45 am
YYZ
- STL
1 stop5h 01m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$480
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 June 30, 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 June 30, 2026.
This American Airlines deal was found by Cheapflights users on 6/27. 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 11/36:00 am
STL
- YYZ
1 stop9h 04m
American Airlines
Deal found 6/27![American Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 8/96:34 pm
STL
- YYZ
3 stops21h 35m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/196:34 pm
STL
- YYZ
3 stops21h 35m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$172
This American Airlines deal was found by Cheapflights users on 6/26. 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 7/211:25 pm
STL
- YYZ
1 stop9h 04m
American Airlines
Deal found 6/26![American Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:35 am
STL
- YYZ
2 stops31h 30m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/214:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 7/204:57 pm
STL
- YYZ
2 stops22h 58m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/274:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 10/1810:35 am
STL
- YYZ
2 stops29h 20m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$201
This American Airlines deal was found by Cheapflights users on 6/29. 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 8/136:00 am
STL
- YYZ
1 stop7h 33m
American Airlines
Deal found 6/29![American Airlines logo]()
$207
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 June 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $384 (American Airlines) |
One-way from | $163 (American Airlines) |
Popular in | January |
Cheapest in | December |
Average price | $600 |
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 June 30, 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
Fri 7/31
4:57 pm-2:05 pm
2 stops20h 08m
Toronto Pearson Intl
Thu 8/6
7:45 am-11:46 am
1 stop5h 01m
$480
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 10/11
8:30 am-2:19 pm
1 stop4h 49m
Toronto Pearson Intl
Sun 10/11
5:27 pm-9:21 pm
1 stop4h 54m
$581
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 10/1
8:00 am-1:42 pm
1 stop4h 42m
Toronto Pearson Intl
Wed 12/2
2:10 pm-3:26 pm
Nonstop2h 16m
$583
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 9/18
6:40 am-3:15 pm
1 stop7h 35m
Toronto Pearson Intl
Mon 9/21
6:59 pm-8:06 am
1 stop14h 07m
$594
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 8/25
8:55 am-11:56 am
Nonstop2h 01m
Toronto Pearson Intl
Tue 9/8
12:55 pm-2:00 pm
Nonstop2h 05m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 9/13
6:40 am-11:18 am
1 stop3h 38m
Toronto Pearson Intl
Wed 9/16
7:55 am-3:36 pm
1 stop8h 41m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 9/16
6:40 am-6:09 pm
2 stops10h 29m
Toronto Pearson Intl
Sat 9/19
7:55 am-4:52 pm
1 stop9h 57m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 9/4
5:30 pm-11:59 pm
1 stop5h 29m
Toronto Pearson Intl
Mon 9/7
2:00 pm-6:42 pm
1 stop5h 42m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 9/1
5:30 pm-11:59 pm
1 stop5h 29m
Toronto Pearson Intl
Sun 9/6
12:55 pm-2:02 pm
Nonstop2h 07m
$599
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 8/13
5:30 pm-11:59 pm
1 stop5h 29m
Toronto Pearson Intl
Tue 8/18
12:55 pm-2:02 pm
Nonstop2h 07m
$613
Showing 1-10 of 22 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 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 June 30, 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.
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 June 30, 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.
Boarding
7.7
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
Boarding
7.7
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
Boarding
7.7
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
Boarding
7.7
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
6.0
GoodMiz,Oct 2024
EWR - YYZ
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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Alternative routes for St. Louis to Niagara Falls
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Complete your trip
Complete your trip to Niagara Falls by adding a car rental and/or hotel reservation to your travel itinerary.
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St. Louis and Niagara Falls flights
Browse other St. Louis and Niagara Falls flight options. Last updated on June 30, 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 June 30, 2026.
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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 June 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$247 | Average$617 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$253 | Average$616 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$270 | Average$545 | FlexibilityNo cancel fee | On-time71% |