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Niagara Falls

$105+ Cheap flights from St. Louis (STL) to Niagara Falls, 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 October, booked 12 days in advance, depart on a Tuesday or Thursday and return on a Saturday

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 September 17, 2025.

Round-trip from

$249
(Kiwi.com)

One-way from

$105
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$489
From Lambert-St Louis to Niagara Falls
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One-way flight from Lambert-St Louis to Niagara Falls
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Highest demand for flights based on searches. 4% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/3010:57 amSTL - YYZ
1 stop26h 43mMultiple Airlines
Sun 11/28:00 pmYYZ - STL
1 stop14h 40mMultiple Airlines
Deal found 9/16$285
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/157:52 pmSTL - YYZ
2 stops23h 06mMultiple Airlines
Wed 10/226:30 amYYZ - STL
1 stop28h 32mMultiple Airlines
Deal found 9/17$300
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/54:00 pmSTL - YYZ
2 stops27h 55mMultiple Airlines
Wed 10/156:30 amYYZ - STL
1 stop28h 32mMultiple Airlines
Deal found 9/16$319
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/1610:57 amSTL - YYZ
1 stop11h 55mMultiple Airlines
Thu 10/239:35 amYYZ - STL
2 stops25h 41mMultiple Airlines
Deal found 9/17$328
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/157:52 pmSTL - YYZ
2 stops23h 06mMultiple Airlines
Sat 10/186:30 amYYZ - STL
1 stop12h 40mMultiple Airlines
Deal found 9/15$329
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/910:57 amSTL - YYZ
1 stop11h 55mMultiple Airlines
Thu 10/166:30 amYYZ - STL
2 stops29h 07mMultiple Airlines
Deal found 9/15$331
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/172:12 pmSTL - YYZ
1 stop8h 59mMultiple Airlines
Thu 11/205:15 pmYYZ - STL
1 stop7h 42mMultiple Airlines
Deal found 9/16$333
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/17:15 pmSTL - YYZ
1 stop26h 57mMultiple Airlines
Fri 11/712:50 pmYYZ - STL
2 stops21h 17mMultiple Airlines
Deal found 9/16$338
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 11/1312:20 pmSTL - YYZ
1 stop25h 20mMultiple Airlines
Sun 11/168:00 pmYYZ - STL
1 stop14h 40mMultiple Airlines
Deal found 9/17$344

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 September 17, 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

Thu 10/30

10:57 am-2:40 pm

1 stop26h 43m

Toronto Pearson Intl

Sun 11/2

8:00 pm-9:40 am

1 stop14h 40m

$285

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/16

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Thu 10/23

9:35 am-10:16 am

2 stops25h 41m

$328

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/9

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Thu 10/16

6:30 am-10:37 am

2 stops29h 07m

$331

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 11/1

7:15 pm-11:12 pm

1 stop26h 57m

Toronto Pearson Intl

Fri 11/7

12:50 pm-3:38 pm

1 stop27h 48m

$346

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/9

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Sun 10/12

10:25 pm-9:07 am

2 stops35h 42m

$395

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 11/8

7:45 pm-2:20 pm

2 stops17h 35m

Toronto Pearson Intl

Tue 11/11

6:30 am-11:59 am

1 stop6h 29m

$423

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 10/15

7:52 pm-7:58 pm

2 stops23h 06m

Toronto Pearson Intl

Sun 10/19

6:09 pm-5:29 pm

1 stop24h 20m

$430

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/3

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

Mon 10/6

9:50 am-8:37 pm

1 stop11h 47m

$445

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 10/15

9:31 am-4:09 pm

1 stop5h 38m

Toronto Pearson Intl

Wed 10/22

6:30 am-10:02 am

1 stop28h 32m

$457

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 9/29

1:57 pm-10:40 pm

1 stop7h 43m

Toronto Pearson Intl

Tue 9/30

9:30 am-9:06 am

2 stops24h 36m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 17 results
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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 September 12, 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, January is the cheapest month in which you can book a flight from St. Louis to Niagara Falls (average of $243). Flying from St. Louis to Niagara Falls in August is currently the most expensive (average of $348). 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 September 17, 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 September 17, 2025.

The most flights from STL to NI4 are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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 September 17, 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
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 5 flights from Lambert-St Louis to Niagara Falls per day from 3 different airlines.

  • 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 (90%), Jazz (90%) and United Airlines (60%).

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

    Looking at all options, your cheapest flight can be booked for $221. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $285 on average, our data indicates $1,287 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, January is the cheapest month in which you can book a flight from St. Louis to Niagara Falls (average of $243). Flying from St. Louis to Niagara Falls in August is currently the most expensive (average of $348). 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

Browse thousands of different options on Cheapflights for your next trip

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$527FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$508FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$330Average$612FlexibilityNo cancel feeOn-time71%

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