$202+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
jul. 9 — jul. 161
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 junio 9, 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 junio 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
mié. 7/87:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
dom. 7/124:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$429
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
mié. 7/228:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
mié. 7/228:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$448
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
mar. 7/217:00 am
YYZ
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
mar. 7/216:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
vie. 7/249:50 am
YYZ
- STL
1 stop15h 09m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
mar. 7/217:00 am
YYZ
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$463
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
dom. 7/126:34 pm
STL
- YYZ
2 stops21h 21m
Multiple Airlines
lun. 7/208:35 pm
YYZ
- STL
1 stop22h 30m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/287:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
jue. 8/612:55 pm
YYZ
- STL
2 stops45h 02m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
mié. 7/224:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
mié. 8/54:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
vie. 7/314:57 pm
STL
- YYZ
2 stops18h 03m
Multiple Airlines
mar. 8/49:50 am
YYZ
- STL
1 stop15h 09m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$472
This American Airlines deal was found by Cheapflights users on 6/9. 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.
mar. 8/49:08 am
STL
- YYZ
1 stop7h 26m
American Airlines
mar. 8/251:15 pm
YYZ
- STL
1 stop11h 59m
American Airlines
Deal found 6/9![American Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
mar. 7/77:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
mar. 7/146:30 am
YYZ
- STL
2 stops12h 07m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$475
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 junio 9, 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 junio 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
jue. 8/137:10 pm
STL
- YYZ
1 stop10h 29m
Multiple Airlines
dom. 8/168:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$538
This United Airlines deal was found by Cheapflights users on 6/9. 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.
jue. 6/252:15 pm
STL
- YYZ
Nonstop1h 51m
United Airlines
dom. 6/2811:15 am
YYZ
- STL
Nonstop2h 06m
United Airlines
Deal found 6/9![United Airlines logo]()
$599
This Delta deal was found by Cheapflights users on 6/8. 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.
mié. 7/156:30 am
STL
- YYZ
1 stop3h 49m
Delta
dom. 7/196:10 am
YYZ
- STL
1 stop4h 21m
Delta
Deal found 6/8![Delta logo]()
$606
This Delta deal was found by Cheapflights users on 6/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/210:29 am
STL
- YYZ
1 stop3h 46m
Delta
mié. 10/79:45 am
YYZ
- STL
1 stop4h 35m
Delta
Deal found 6/6![Delta logo]()
$606
This United Airlines deal was found by Cheapflights users on 6/9. 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.
jue. 7/21:13 pm
STL
- YYZ
1 stop6h 31m
United Airlines
lun. 7/612:55 pm
YYZ
- STL
Nonstop2h 07m
United Airlines
Deal found 6/9![United Airlines logo]()
$608
This Delta deal was found by Cheapflights users on 6/8. 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.
dom. 7/1210:19 am
STL
- YYZ
1 stop4h 01m
Delta
dom. 7/196:10 am
YYZ
- STL
1 stop4h 21m
Delta
Deal found 6/8![Delta logo]()
$606
This Delta deal was found by Cheapflights users on 6/4. 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.
vie. 7/2410:19 am
STL
- YYZ
1 stop6h 05m
Delta
dom. 7/266:10 am
YYZ
- STL
1 stop4h 21m
Delta
Deal found 6/4![Delta logo]()
$606
This Delta deal was found by Cheapflights users on 6/8. 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.
mar. 7/2110:19 am
STL
- YYZ
1 stop4h 01m
Delta
mar. 7/289:45 am
YYZ
- STL
1 stop4h 20m
Delta
Deal found 6/8![Delta logo]()
$606
This Delta deal was found by Cheapflights users on 6/8. 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.
jue. 7/1610:19 am
STL
- YYZ
1 stop4h 01m
Delta
jue. 7/236:10 am
YYZ
- STL
1 stop4h 21m
Delta
Deal found 6/8![Delta logo]()
$606
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated junio 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated junio 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
mar. 7/77:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
mar. 7/146:30 am
YYZ
- STL
2 stops12h 07m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$475
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
mié. 7/87:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
dom. 7/124:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$429
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
dom. 7/126:34 pm
STL
- YYZ
2 stops21h 21m
Multiple Airlines
lun. 7/208:35 pm
YYZ
- STL
1 stop22h 30m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
mié. 7/228:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$448
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
mar. 7/217:00 am
YYZ
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$463
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
mié. 7/228:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
mar. 7/217:00 am
YYZ
- STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
jue. 7/166:34 pm
STL
- YYZ
2 stops45h 21m
Multiple Airlines
mié. 7/228:35 pm
YYZ
- STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$476
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
mar. 7/216:34 pm
STL
- YYZ
2 stops16h 26m
Multiple Airlines
vie. 7/249:50 am
YYZ
- STL
1 stop15h 09m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
mié. 7/224:09 pm
STL
- YYZ
1 stop23h 36m
Multiple Airlines
mié. 8/54:45 pm
YYZ
- STL
2 stops26h 51m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/287:03 pm
STL
- YYZ
1 stop10h 36m
Multiple Airlines
jue. 8/612:55 pm
YYZ
- STL
2 stops45h 02m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
vie. 7/314:57 pm
STL
- YYZ
2 stops18h 03m
Multiple Airlines
mar. 8/49:50 am
YYZ
- STL
1 stop15h 09m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$472
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 junio 9, 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 junio 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
vie. 7/104:57 pm
STL
- YYZ
3 stops28h 07m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
lun. 7/64:57 pm
STL
- YYZ
2 stops27h 28m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
dom. 8/96:34 pm
STL
- YYZ
3 stops24h 10m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
dom. 7/56:34 pm
STL
- YYZ
3 stops21h 35m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
lun. 8/315:33 pm
STL
- YYZ
2 stops19h 32m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
lun. 8/34:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
sáb. 7/184:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mié. 8/124:57 pm
STL
- YYZ
2 stops20h 08m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
dom. 7/126:34 pm
STL
- YYZ
2 stops21h 21m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
dom. 8/26:34 pm
STL
- YYZ
3 stops24h 10m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$225
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 junio 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $429 (Kiwi.com) |
One-way from | $202 (Kiwi.com) |
Popular in | January |
Cheapest in | March |
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 junio 9, 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
jue. 8/13
7:10 pm-6:39 am
1 stop10h 29m
Toronto Pearson Intl
dom. 8/16
8:35 pm-6:15 pm
1 stop22h 40m
$538
Quickest round-trip
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
jue. 6/25
2:15 pm-5:06 pm
Nonstop1h 51m
Toronto Pearson Intl
dom. 6/28
11:15 am-12:21 pm
Nonstop2h 06m
$599
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
mié. 7/15
6:30 am-11:19 am
1 stop3h 49m
Toronto Pearson Intl
dom. 7/19
6:10 am-9:31 am
1 stop4h 21m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
vie. 10/2
10:29 am-3:15 pm
1 stop3h 46m
Toronto Pearson Intl
mié. 10/7
9:45 am-1:20 pm
1 stop4h 35m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
dom. 7/12
10:19 am-3:20 pm
1 stop4h 01m
Toronto Pearson Intl
dom. 7/19
6:10 am-9:31 am
1 stop4h 21m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
vie. 7/24
10:19 am-5:24 pm
1 stop6h 05m
Toronto Pearson Intl
dom. 7/26
6:10 am-9:31 am
1 stop4h 21m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
mar. 7/21
10:19 am-3:20 pm
1 stop4h 01m
Toronto Pearson Intl
mar. 7/28
9:45 am-1:05 pm
1 stop4h 20m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
jue. 7/16
10:19 am-3:20 pm
1 stop4h 01m
Toronto Pearson Intl
jue. 7/23
6:10 am-9:31 am
1 stop4h 21m
$606
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
jue. 7/2
1:13 pm-8:44 pm
1 stop6h 31m
Toronto Pearson Intl
lun. 7/6
12:55 pm-2:02 pm
Nonstop2h 07m
$608
Cheapest one-way
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
mié. 8/12
4:57 pm-2:05 pm
2 stops20h 08m
$217
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 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 junio 9, 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 junio 9, 2026.
The most flights from STL to NI4 are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 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 junio 9, 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.
Crew
8.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.6
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - 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.
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 junio 9, 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 junio 9, 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 junio 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$218 | Average$556 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$586 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$270 | Average$545 | FlexibilityNo cancel fee | On-time71% |