$162+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Jun 9 — Jun 161
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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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 May 10, 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 May 10, 2026.
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:35 am
STL
- YYZ
1 stop10h 09m
American Airlines
Tue 6/93:13 pm
YYZ
- STL
1 stop10h 03m
American Airlines
Deal found 5/8![American Airlines logo]()
$390
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Tue 6/94:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Tue 6/166:30 am
YYZ
- STL
2 stops27h 22m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/234:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Tue 6/306:30 am
YYZ
- STL
2 stops27h 22m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/179:09 am
STL
- YYZ
1 stop7h 35m
American Airlines
Wed 6/247:25 am
YYZ
- STL
1 stop7h 37m
American Airlines
Deal found 5/8![American Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 6/35:27 pm
STL
- YYZ
2 stops19h 38m
Multiple Airlines
Wed 6/107:45 am
YYZ
- STL
1 stop17h 04m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$414
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Tue 6/91:42 pm
STL
- YYZ
1 stop8h 47m
American Airlines
Tue 6/167:25 am
YYZ
- STL
1 stop7h 37m
American Airlines
Deal found 5/7![American Airlines logo]()
$415
This American Airlines deal was found by Cheapflights users on 5/10. 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 7/219:08 am
STL
- YYZ
1 stop7h 26m
American Airlines
Tue 7/283:14 pm
YYZ
- STL
1 stop10h 02m
American Airlines
Deal found 5/10![American Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Wed 6/104:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Sun 6/144:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 7/134:52 pm
STL
- YYZ
2 stops20h 13m
Multiple Airlines
Fri 7/179:50 am
YYZ
- STL
1 stop15h 09m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$435
This American Airlines deal was found by Cheapflights users on 5/6. 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 5/286:00 am
STL
- YYZ
1 stop10h 44m
American Airlines
Wed 6/37:20 am
YYZ
- STL
1 stop10h 10m
American Airlines
Deal found 5/6![American Airlines logo]()
$437
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/104:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Wed 6/179:30 am
YYZ
- STL
2 stops33h 00m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$438
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 May 10, 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 May 10, 2026.
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/92:40 pm
STL
- YYZ
Nonstop1h 57m
Air Canada
Thu 8/207:00 pm
YYZ
- STL
Nonstop2h 07m
Air Canada
Deal found 5/5![Air Canada logo]()
$488
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:08 am
STL
- YYZ
1 stop5h 51m
American Airlines
Fri 6/127:25 am
YYZ
- STL
1 stop7h 37m
American Airlines
Deal found 5/8![American Airlines logo]()
$565
This Delta deal was found by Cheapflights users on 5/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:10 pm
STL
- YYZ
1 stop3h 52m
Delta
Sat 6/207:55 am
YYZ
- STL
1 stop5h 25m
Delta
Deal found 5/7![Delta logo]()
$572
This Air Canada deal was found by Cheapflights users on 5/5. 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.
Wed 6/178:40 am
STL
- YYZ
Nonstop1h 58m
Air Canada
Mon 6/2211:15 am
YYZ
- STL
Nonstop2h 06m
Air Canada
Deal found 5/5![Air Canada logo]()
$547
This Delta deal was found by Cheapflights users on 5/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/156:10 pm
STL
- YYZ
1 stop3h 52m
Delta
Sat 6/206:30 am
YYZ
- STL
1 stop4h 58m
Delta
Deal found 5/7![Delta logo]()
$572
This BYOjet deal was found by Cheapflights users on 5/5. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:10 pm
STL
- YYZ
1 stop5h 51m
Air Canada
Fri 8/2110:10 am
YYZ
- STL
2 stops9h 32m
Air Canada
Deal found 5/5![Air Canada logo]()
$556
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:17 am
STL
- YYZ
1 stop7h 02m
Delta
Sun 8/96:10 am
YYZ
- STL
1 stop4h 27m
Delta
Deal found 5/8![Delta logo]()
$594
This Air Canada deal was found by Cheapflights users on 5/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/42:40 pm
STL
- YYZ
Nonstop1h 57m
Air Canada
Wed 8/512:55 pm
YYZ
- STL
Nonstop2h 07m
Air Canada
Deal found 5/8![Air Canada logo]()
$569
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:00 am
STL
- YYZ
1 stop5h 19m
Delta
Sun 8/96:10 am
YYZ
- STL
1 stop4h 27m
Delta
Deal found 5/8![Delta logo]()
$594
This Air Canada deal was found by Cheapflights users on 5/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:55 am
STL
- YYZ
Nonstop1h 57m
Air Canada
Wed 8/57:00 pm
YYZ
- STL
Nonstop2h 07m
Air Canada
Deal found 5/8![Air Canada logo]()
$569
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated May 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated May 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/6. 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 5/286:00 am
STL
- YYZ
1 stop10h 44m
American Airlines
Wed 6/37:20 am
YYZ
- STL
1 stop10h 10m
American Airlines
Deal found 5/6![American Airlines logo]()
$437
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:35 am
STL
- YYZ
1 stop10h 09m
American Airlines
Tue 6/93:13 pm
YYZ
- STL
1 stop10h 03m
American Airlines
Deal found 5/8![American Airlines logo]()
$390
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 6/35:27 pm
STL
- YYZ
2 stops19h 38m
Multiple Airlines
Wed 6/107:45 am
YYZ
- STL
1 stop17h 04m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$414
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Mon 6/85:27 pm
STL
- YYZ
2 stops17h 33m
Multiple Airlines
Wed 6/109:50 am
YYZ
- STL
1 stop14h 59m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Tue 6/94:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Tue 6/166:30 am
YYZ
- STL
2 stops27h 22m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Tue 6/91:42 pm
STL
- YYZ
1 stop8h 47m
American Airlines
Tue 6/167:25 am
YYZ
- STL
1 stop7h 37m
American Airlines
Deal found 5/7![American Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Wed 6/104:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Sun 6/144:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/104:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Wed 6/179:30 am
YYZ
- STL
2 stops33h 00m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$438
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/179:09 am
STL
- YYZ
1 stop7h 35m
American Airlines
Wed 6/247:25 am
YYZ
- STL
1 stop7h 37m
American Airlines
Deal found 5/8![American Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/175:06 pm
STL
- YYZ
2 stops19h 59m
Multiple Airlines
Tue 8/259:50 am
YYZ
- STL
1 stop15h 24m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/234:17 pm
STL
- YYZ
1 stop23h 28m
Multiple Airlines
Tue 6/306:30 am
YYZ
- STL
2 stops27h 22m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$399
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 May 10, 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 May 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 6/105:06 pm
STL
- YYZ
2 stops19h 59m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$162
This American Airlines deal was found by Cheapflights users on 5/10. 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 6/169:09 am
STL
- YYZ
1 stop7h 35m
American Airlines
Deal found 5/10![American Airlines logo]()
$168
This American Airlines deal was found by Cheapflights users on 5/5. 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 6/232:32 pm
STL
- YYZ
1 stop7h 57m
American Airlines
Deal found 5/5![American Airlines logo]()
$175
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Wed 6/242:32 pm
STL
- YYZ
1 stop7h 57m
American Airlines
Deal found 5/7![American Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/166:31 pm
STL
- YYZ
2 stops49h 24m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Fri 7/35:06 pm
STL
- YYZ
2 stops19h 59m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/175:06 pm
STL
- YYZ
2 stops26h 49m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 6/238:08 pm
STL
- YYZ
2 stops25h 37m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$193
This American Airlines deal was found by Cheapflights users on 5/5. 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 6/309:09 am
STL
- YYZ
1 stop7h 35m
American Airlines
Deal found 5/5![American Airlines logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Sun 8/96:33 pm
STL
- YYZ
2 stops42h 32m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/306:33 pm
STL
- YYZ
3 stops42h 32m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$199
This American Airlines deal was found by Cheapflights users on 5/6. 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 5/287:00 am
STL
- YYZ
1 stop9h 44m
American Airlines
Deal found 5/6![American Airlines logo]()
$202
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 May 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $390 (American Airlines) |
One-way from | $162 (Kiwi.com) |
Popular in | January |
Cheapest in | March |
Average price | $553 |
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 May 10, 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
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 8/9
2:40 pm-5:37 pm
Nonstop1h 57m
Toronto Pearson Intl
Thu 8/20
7:00 pm-8:07 pm
Nonstop2h 07m
$488
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 6/17
8:40 am-11:38 am
Nonstop1h 58m
Toronto Pearson Intl
Mon 6/22
11:15 am-12:21 pm
Nonstop2h 06m
$547
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 8/9
12:10 pm-7:01 pm
1 stop5h 51m
Toronto Pearson Intl
Fri 8/21
10:10 am-6:42 pm
2 stops9h 32m
$556
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 6/5
5:08 am-11:59 am
1 stop5h 51m
Toronto Pearson Intl
Fri 6/12
7:25 am-2:02 pm
1 stop7h 37m
$565
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 8/4
2:40 pm-5:37 pm
Nonstop1h 57m
Toronto Pearson Intl
Wed 8/5
12:55 pm-2:02 pm
Nonstop2h 07m
$569
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 8/3
8:55 am-11:52 am
Nonstop1h 57m
Toronto Pearson Intl
Wed 8/5
7:00 pm-8:07 pm
Nonstop2h 07m
$569
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Sun 6/14
6:10 pm-11:02 pm
1 stop3h 52m
Toronto Pearson Intl
Sat 6/20
7:55 am-12:20 pm
1 stop5h 25m
$572
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 6/15
6:10 pm-11:02 pm
1 stop3h 52m
Toronto Pearson Intl
Sat 6/20
6:30 am-10:28 am
1 stop4h 58m
$572
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 8/5
9:17 am-5:19 pm
1 stop7h 02m
Toronto Pearson Intl
Sun 8/9
6:10 am-9:37 am
1 stop4h 27m
$594
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 8/6
11:00 am-5:19 pm
1 stop5h 19m
Toronto Pearson Intl
Sun 8/9
6:10 am-9:37 am
1 stop4h 27m
$594
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 May 10, 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 May 10, 2026.
The most flights from STL to NI4 are scheduled on a Monday (4 on average). You will have fewer flight options on Wednesday, 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 May 10, 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.
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Apr 2026
DFW - EWR
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.
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 May 10, 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 May 10, 2026.
Popular flight searches
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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 May 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$218 | Average$543 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$596 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$270 | Average$558 | FlexibilityNo cancel fee | On-time71% |