$131+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Mar 7 — Mar 141
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.Cheapflights Tip: The best prices from Lambert-St Louis to Niagara Falls are usually found in May or July, booked 12 days in advance, depart on a Tuesday or Sunday and return on a Sunday
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 February 5, 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 February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/23:49 pm
STL
- YYZ
1 stop21h 31m
Multiple Airlines
Mon 3/93:40 pm
YYZ
- STL
2 stops32h 39m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Tue 3/177:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/33:49 pm
STL
- YYZ
1 stop21h 31m
Multiple Airlines
Tue 3/107:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Thu 3/198:35 pm
YYZ
- STL
1 stop15h 44m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Wed 3/189:35 am
YYZ
- STL
1 stop27h 40m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/94:51 pm
STL
- YYZ
1 stop20h 29m
Multiple Airlines
Sun 3/1510:15 pm
YYZ
- STL
2 stops39h 00m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 3/168:10 pm
STL
- YYZ
1 stop17h 10m
Multiple Airlines
Wed 3/189:35 am
YYZ
- STL
1 stop27h 40m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 3/2312:14 pm
STL
- YYZ
1 stop17h 29m
Multiple Airlines
Thu 3/268:35 pm
YYZ
- STL
1 stop15h 44m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 3/168:10 pm
STL
- YYZ
1 stop17h 10m
Multiple Airlines
Mon 3/233:40 pm
YYZ
- STL
2 stops19h 52m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$344
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 February 5, 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 February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 3/2312:14 pm
STL
- YYZ
1 stop17h 29m
Multiple Airlines
Thu 3/268:35 pm
YYZ
- STL
1 stop15h 44m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:00 am
STL
- YYZ
1 stop31h 35m
Alaska Airlines
Tue 3/104:45 pm
YYZ
- STL
1 stop22h 06m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$422
This American Airlines deal was found by Cheapflights users on 2/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:46 am
STL
- YYZ
1 stop7h 47m
American Airlines
Sun 4/1911:33 am
YYZ
- STL
1 stop6h 08m
American Airlines
Deal found 2/4![American Airlines logo]()
$491
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/61:09 pm
STL
- YYZ
2 stops21h 26m
Multiple Airlines
Tue 3/107:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Fri 4/248:13 pm
STL
- YYZ
2 stops16h 52m
Multiple Airlines
Tue 4/287:15 am
YYZ
- STL
1 stop17h 04m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:00 am
STL
- YYZ
1 stop31h 35m
Alaska Airlines
Wed 3/114:45 pm
YYZ
- STL
1 stop32h 14m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Thu 3/128:06 pm
STL
- YYZ
1 stop9h 54m
Multiple Airlines
Mon 3/167:55 pm
YYZ
- STL
1 stop17h 20m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/277:00 am
STL
- YYZ
1 stop31h 35m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- STL
1 stop32h 14m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$475
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Fri 3/61:09 pm
STL
- YYZ
2 stops21h 26m
Multiple Airlines
Fri 3/139:35 am
YYZ
- STL
1 stop26h 44m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$485
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Fri 5/18:13 pm
STL
- YYZ
2 stops27h 07m
Multiple Airlines
Mon 5/47:22 pm
YYZ
- STL
1 stop4h 51m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$498
Last-minute flights from St. Louis to Niagara FallsDiscover last-minute flight deals from St. Louis to Niagara Falls. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Niagara Falls. Data last updated February 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/23:49 pm
STL
- YYZ
1 stop21h 31m
Multiple Airlines
Mon 3/93:40 pm
YYZ
- STL
2 stops32h 39m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/33:49 pm
STL
- YYZ
1 stop21h 31m
Multiple Airlines
Tue 3/107:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/94:51 pm
STL
- YYZ
1 stop20h 29m
Multiple Airlines
Sun 3/1510:15 pm
YYZ
- STL
2 stops39h 00m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Tue 3/177:10 am
YYZ
- STL
1 stop17h 09m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Thu 3/198:35 pm
YYZ
- STL
1 stop15h 44m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/1111:32 am
STL
- YYZ
2 stops22h 54m
Multiple Airlines
Wed 3/189:35 am
YYZ
- STL
1 stop27h 40m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 3/168:10 pm
STL
- YYZ
1 stop17h 10m
Multiple Airlines
Wed 3/189:35 am
YYZ
- STL
1 stop27h 40m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 3/168:10 pm
STL
- YYZ
1 stop17h 10m
Multiple Airlines
Mon 3/233:40 pm
YYZ
- STL
2 stops19h 52m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 3/2312:14 pm
STL
- YYZ
1 stop17h 29m
Multiple Airlines
Thu 3/268:35 pm
YYZ
- STL
1 stop15h 44m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$340
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 February 5, 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 February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/158:13 pm
STL
- YYZ
2 stops16h 52m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/23:49 pm
STL
- YYZ
1 stop21h 31m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$132
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/1512:25 pm
STL
- YYZ
1 stop10h 04m
American Airlines
Deal found 2/2![American Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Fri 2/2710:11 pm
STL
- YYZ
3 stops24h 27m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Sun 3/298:06 pm
STL
- YYZ
2 stops22h 30m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$149
This American Airlines deal was found by Cheapflights users on 2/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:00 am
STL
- YYZ
1 stop8h 43m
American Airlines
Deal found 2/4![American Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Sat 2/282:51 pm
STL
- YYZ
2 stops38h 52m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/168:22 pm
STL
- YYZ
2 stops40h 58m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$189
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 February 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $307 (Kiwi.com) |
One-way from | $131 (Kiwi.com) |
Popular in | January |
Cheapest in | May |
Average price | $449 |
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 February 5, 2026.
Use the filters below to find and compare flights from St. Louis to Niagara Falls that are best for you.
Fly from
St. Louis
Fly to
Niagara Falls
Route
Depart
Return
Price
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Mon 3/23
12:14 pm-6:43 am
1 stop17h 29m
Toronto Pearson Intl
Thu 3/26
8:35 pm-11:19 am
1 stop15h 44m
$340
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 3/6
1:09 pm-11:35 am
2 stops21h 26m
Toronto Pearson Intl
Tue 3/10
7:10 am-11:19 pm
1 stop17h 09m
$360
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 4/24
8:13 pm-2:05 pm
2 stops16h 52m
Toronto Pearson Intl
Tue 4/28
7:15 am-11:19 pm
1 stop17h 04m
$409
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Thu 3/12
8:06 pm-7:00 am
1 stop9h 54m
Toronto Pearson Intl
Mon 3/16
7:55 pm-12:15 pm
1 stop17h 20m
$412
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Tue 3/3
7:00 am-3:35 pm
1 stop31h 35m
Toronto Pearson Intl
Tue 3/10
4:45 pm-1:51 pm
1 stop22h 06m
$422
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 3/4
7:00 am-3:35 pm
1 stop31h 35m
Toronto Pearson Intl
Wed 3/11
4:45 pm-11:59 pm
1 stop32h 14m
$465
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 2/27
7:00 am-3:35 pm
1 stop31h 35m
Toronto Pearson Intl
Sun 3/1
4:45 pm-11:59 pm
1 stop32h 14m
$475
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 3/6
1:09 pm-11:35 am
2 stops21h 26m
Toronto Pearson Intl
Fri 3/13
9:35 am-11:19 am
1 stop26h 44m
$485
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Wed 4/15
5:46 am-2:33 pm
1 stop7h 47m
Toronto Pearson Intl
Sun 4/19
11:33 am-4:41 pm
1 stop6h 08m
$491
St. LouisToronto
STL - YYZ
STLYYZ
Lambert-St Louis
Fri 5/1
8:13 pm-12:20 am
2 stops27h 07m
Toronto Pearson Intl
Mon 5/4
7:22 pm-11:13 pm
1 stop4h 51m
$498
Showing 1-10 of 16 results
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
How far ahead should I book a flight from St. Louis to Niagara Falls?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Niagara Falls. Price data was last updated on January 30, 2026.
Booking 12 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Niagara Falls. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 $180). 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 February 5, 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 February 5, 2026.
The most flights from STL to NI4 are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from St. Louis to Niagara Falls?
Reviews of airlines servicing Niagara Falls
Get insights into the airlines that provide service to Niagara Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Niagara Falls. Reviews last updated February 5, 2026.
Read reviews from past customers who have flown United Airlines, American Airlines, and Air Canada from St. Louis to Niagara Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Crew
8.1
Comfort
7.3
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Crew
8.1
Comfort
7.3
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Crew
8.1
Comfort
7.3
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Crew
8.1
Comfort
7.3
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Related info for your journey
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$397 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$214 | Average$504 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$270 | Average$545 | FlexibilityNo cancel fee | On-time71% |