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Niagara Falls

$110+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Niagara Falls are usually found in January or May, booked 12 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

Find flight deals from St. Louis to Niagara Falls

Cheapest flights from St. Louis to Niagara Falls
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 octubre 30, 2025.

This American Airlines deal was found by Cheapflights users on 10/27. 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.
lun. 12/155:15 amSTL - YYZ
1 stop11h 29mAmerican Airlines
jue. 1/81:14 pmYYZ - STL
1 stop9h 01mAmerican Airlines
Deal found 10/27$276
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
lun. 12/1510:47 amSTL - YYZ
2 stops36h 24mMultiple Airlines
jue. 1/87:10 amYYZ - STL
1 stop16h 23mMultiple Airlines
Deal found 10/27$295
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 12/43:30 pmSTL - YYZ
1 stop7h 41mMultiple Airlines
lun. 12/812:50 pmYYZ - STL
1 stop10h 43mMultiple Airlines
Deal found 10/28$301
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
lun. 11/179:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
vie. 11/217:00 amYYZ - STL
1 stop26h 57mMultiple Airlines
Deal found 10/28$316
This Kiwi.com deal was found by Cheapflights users on 10/30. 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. 12/810:47 amSTL - YYZ
2 stops12h 38mMultiple Airlines
lun. 12/157:15 amYYZ - STL
1 stop16h 18mMultiple Airlines
Deal found 10/30$321
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
jue. 12/112:47 pmSTL - YYZ
1 stop22h 53mMultiple Airlines
dom. 12/148:20 pmYYZ - STL
2 stops14h 32mMultiple Airlines
Deal found 10/27$337
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
lun. 11/179:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
jue. 11/205:15 pmYYZ - STL
1 stop7h 42mMultiple Airlines
Deal found 10/28$358
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
vie. 12/123:30 pmSTL - YYZ
1 stop19h 13mMultiple Airlines
lun. 12/155:15 pmYYZ - STL
1 stop30h 18mMultiple Airlines
Deal found 10/27$361
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
dom. 11/166:21 pmSTL - YYZ
2 stops25h 46mMultiple Airlines
jue. 11/205:15 pmYYZ - STL
1 stop7h 42mMultiple Airlines
Deal found 10/28$362
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
dom. 12/73:30 pmSTL - YYZ
1 stop19h 13mMultiple Airlines
jue. 12/117:55 pmYYZ - STL
1 stop17h 17mMultiple Airlines
Deal found 10/29$367

Cheap 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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$241
(Kiwi.com)

One-way from

$110
(American Airlines)

Popular in

November

Cheapest in

January

Average price

$624
Provider with most accurate pricing for Lambert-St Louis-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto (YTO) flights.
Search Deals
From Lambert-St Louis to Niagara Falls
Search Deals
One-way flight from Lambert-St Louis to Niagara Falls
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 octubre 30, 2025.
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

jue. 1/8

5:11 pm-2:20 pm

1 stop20h 09m

Toronto Pearson Intl

mié. 1/14

7:15 am-10:37 pm

1 stop16h 22m

$270

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

lun. 12/15

5:15 am-5:44 pm

1 stop11h 29m

Toronto Pearson Intl

jue. 1/8

1:14 pm-9:15 pm

1 stop9h 01m

$276

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 1/14

5:06 pm-2:20 pm

1 stop20h 14m

Toronto Pearson Intl

sáb. 1/17

2:20 pm-9:46 am

2 stops20h 26m

$296

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

lun. 11/17

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

vie. 11/21

7:00 am-8:57 am

1 stop26h 57m

$316

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 12/4

12:04 pm-12:11 am

2 stops11h 07m

Toronto Pearson Intl

lun. 12/8

7:15 am-10:33 pm

1 stop16h 18m

$325

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 1/15

10:42 am-11:43 am

2 stops24h 01m

Toronto Pearson Intl

dom. 1/18

9:35 am-8:53 pm

1 stop12h 18m

$337

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

lun. 11/17

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

jue. 11/20

5:15 pm-11:57 pm

1 stop7h 42m

$358

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

lun. 12/1

4:13 pm-12:11 am

1 stop6h 58m

Toronto Pearson Intl

jue. 12/4

9:35 am-12:12 pm

1 stop27h 37m

$371

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 11/28

3:53 pm-8:38 am

2 stops15h 45m

Toronto Pearson Intl

lun. 12/1

5:15 pm-10:33 pm

1 stop30h 18m

$376

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

dom. 11/30

4:13 pm-11:43 am

1 stop18h 30m

Toronto Pearson Intl

jue. 12/4

5:15 pm-8:59 am

1 stop16h 44m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 18 results
1
2

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.
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

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 October 24, 2025.

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 $179). Flying from St. Louis to Niagara Falls in February is currently the most expensive (average of $364). 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 octubre 30, 2025.

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 octubre 30, 2025.
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.
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,030 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,376 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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.

  • What airport do you fly from for flights from St. Louis to Niagara Falls?

    If you book a flight to Niagara Falls from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There is 1 flight from Lambert-St Louis to Niagara Falls per day from 3 different airlines.

  • How long is the flight from St. Louis to Niagara Falls?

    A quick flight from St. Louis to Niagara Falls can take about 11h 29m. American Airlines provides one of the quickest options available for as low as $276. St. Louis and Niagara Falls are separated by a distance of 653 mi.

  • What are the most reliable airlines from St. Louis to Niagara Falls?

    The top 3 most reliable airlines when flying from St. Louis to Niagara Falls are Air Canada (93%), Jazz (93%) and United Airlines (93%).

  • What are the cheapest flights from St. Louis to Niagara Falls?

    Looking at all options, your cheapest flight can be booked for $141. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $297 on average, our data indicates $1,431 when flying from St. Louis to Niagara Falls.

  • Can I find deals for flights from St. Louis to Niagara Falls that include hotel bookings?

    Yes. In addition to deals on St. Louis to Niagara Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Niagara Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Niagara Falls.

  • Can I find deals for business class flights from St. Louis to Niagara Falls?

    Yes. Cheapflights offers flight deals from St. Louis to Niagara Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $179). Flying from St. Louis to Niagara Falls in February is currently the most expensive (average of $364). 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.

See more FAQs

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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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$529FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$221Average$530FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$391Average$612FlexibilityNo cancel feeOn-time71%

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