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Niagara Falls

$108+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
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 October 27, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:47 amSTL - YYZ
2 stops12h 24mMultiple Airlines
Mon 12/155:15 pmYYZ - STL
1 stop30h 18mMultiple Airlines
Deal found 10/25$311
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:05 amSTL - YYZ
1 stop9h 58mAmerican Airlines
Wed 12/176:00 amYYZ - STL
1 stop11h 50mAmerican Airlines
Deal found 10/26$316
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
Sat 11/227:00 amYYZ - STL
1 stop28h 03mMultiple Airlines
Deal found 10/26$339
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:53 amSTL - YYZ
1 stop23h 50mMultiple Airlines
Sun 12/78:30 pmYYZ - STL
2 stops14h 22mMultiple Airlines
Deal found 10/26$341
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:53 amSTL - YYZ
1 stop23h 50mMultiple Airlines
Wed 12/35:15 pmYYZ - STL
1 stop30h 18mMultiple Airlines
Deal found 10/26$352
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.
Wed 12/107:43 pmSTL - YYZ
2 stops27h 28mMultiple Airlines
Wed 12/177:10 amYYZ - STL
1 stop16h 23mMultiple Airlines
Deal found 10/27$354
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/83:30 pmSTL - YYZ
1 stop7h 41mMultiple Airlines
Fri 12/125:15 pmYYZ - STL
1 stop30h 18mMultiple Airlines
Deal found 10/26$360
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
Thu 11/139:35 amYYZ - STL
1 stop9h 22mMultiple Airlines
Deal found 10/25$381

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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$279
(American Airlines)

One-way from

$108
(Mytrip)

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 October 27, 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

Sat 2/14

12:58 pm-9:15 pm

1 stop7h 17m

Toronto Pearson Intl

Sat 2/21

6:15 am-5:56 pm

1 stop12h 41m

$279

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 1/7

5:11 pm-2:16 pm

1 stop20h 05m

Toronto Pearson Intl

Sat 1/10

7:10 am-10:33 pm

1 stop16h 23m

$304

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/10

5:05 am-4:03 pm

1 stop9h 58m

Toronto Pearson Intl

Wed 12/17

6:00 am-4:50 pm

1 stop11h 50m

$316

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 2/19

12:20 pm-11:20 pm

1 stop10h 00m

Toronto Pearson Intl

Mon 2/23

8:20 pm-10:02 am

2 stops38h 42m

$331

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/10

7:43 pm-12:11 am

2 stops27h 28m

Toronto Pearson Intl

Wed 12/17

7:10 am-10:33 pm

1 stop16h 23m

$354

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 2/5

12:20 pm-11:20 pm

1 stop10h 00m

Toronto Pearson Intl

Sun 2/8

8:00 pm-10:02 am

2 stops15h 02m

$363

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 2/17

7:00 am-1:02 pm

1 stop5h 02m

Toronto Pearson Intl

Sat 2/21

11:38 am-6:03 pm

1 stop7h 25m

$381

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 11/13

7:02 pm-2:40 pm

1 stop18h 38m

Toronto Pearson Intl

Sun 11/16

7:10 am-9:40 am

1 stop27h 30m

$383

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 11/25

3:14 pm-11:55 pm

2 stops31h 41m

Toronto Pearson Intl

Tue 12/2

7:15 am-10:33 pm

1 stop16h 18m

$417

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 12/10

5:05 am-4:03 pm

1 stop9h 58m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 17 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 October 27, 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.

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 October 27, 2025.

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 October 27, 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
8,999 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

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
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

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
11,031 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

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
10,367 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

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 are 2 flights 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 7h 17m. American Airlines provides one of the quickest options available for as low as $279. 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 $1,261 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 October 27, 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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