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Niagara Falls

$94+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 Tuesday

Cheap 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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Wed 2/253:49 pm
STL
-
YYZ
1 stop18h 37m
Multiple Airlines
Wed 3/47:15 am
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 1/28$218
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/183:49 pm
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Fri 2/207:10 am
YYZ
-
STL
1 stop18h 17m
Multiple Airlines
Deal found 1/27$260
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sat 2/282:51 pm
STL
-
YYZ
2 stops38h 52m
Multiple Airlines
Wed 3/48:20 pm
YYZ
-
STL
1 stop28h 39m
Multiple Airlines
Deal found 1/27$267
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Tue 3/33:49 pm
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Tue 3/177:10 am
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Deal found 1/27$273
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Fri 2/273:49 pm
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Tue 3/37:15 am
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 1/27$295
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Tue 4/74:54 pm
STL
-
YYZ
1 stop30h 20m
Multiple Airlines
Tue 4/143:40 pm
YYZ
-
STL
2 stops16h 10m
Multiple Airlines
Deal found 1/27$299
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Fri 2/273:49 pm
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Wed 3/47:15 am
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 1/27$326
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Mon 4/138:41 am
STL
-
YYZ
1 stop14h 33m
Multiple Airlines
Tue 4/147:15 am
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Deal found 1/27$336

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$218
(Kiwi.com)

One-way from

$94
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$883
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. 12% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 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

Wed 2/25

8:17 pm-11:26 am

2 stops14h 09m

Toronto Pearson Intl

Wed 3/4

7:15 am-10:27 pm

1 stop16h 12m

$265

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 3/3

3:49 pm-12:14 am

1 stop7h 25m

Toronto Pearson Intl

Tue 3/17

1:30 pm-11:19 am

2 stops22h 49m

$280

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 4/13

8:41 am-12:14 am

1 stop14h 33m

Toronto Pearson Intl

Tue 4/14

3:40 pm-6:50 am

2 stops16h 10m

$333

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/21

3:49 pm-12:14 am

1 stop7h 25m

Toronto Pearson Intl

Tue 2/24

5:15 pm-10:27 pm

1 stop30h 12m

$351

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 3/7

6:36 pm-9:56 am

1 stop14h 20m

Toronto Pearson Intl

Tue 3/17

11:40 am-5:58 pm

1 stop7h 18m

$361

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 2/26

3:49 pm-12:14 am

1 stop7h 25m

Toronto Pearson Intl

Wed 3/4

7:15 am-10:27 pm

1 stop16h 12m

$388

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 4/12

11:21 am-2:53 pm

2 stops26h 32m

Toronto Pearson Intl

Thu 4/16

7:15 am-11:19 pm

1 stop17h 04m

$429

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 2/28

3:49 pm-12:14 am

1 stop7h 25m

Toronto Pearson Intl

Mon 3/2

7:15 am-11:59 pm

1 stop17h 44m

$445

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 2/20

5:50 pm-10:40 pm

1 stop3h 50m

Toronto Pearson Intl

Mon 2/23

3:40 pm-6:51 am

2 stops40h 11m

$450

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 3/14

8:12 pm-6:43 am

2 stops57h 31m

Toronto Pearson Intl

Sat 3/21

8:20 pm-7:02 am

1 stop11h 42m

$458

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 22 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 January 23, 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 $178). 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 January 29, 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 January 29, 2026.

The most flights from STL to NI4 are scheduled on a Tuesday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 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 January 29, 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.
United Airlines
7.4
Good
9,215 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,206 reviews
United Airlines
7.4
Good
9,215 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,667 reviews
United Airlines
7.4
Good
9,215 reviews

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 14h 20m. American Airlines provides one of the quickest options available for as low as $361. 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 (72%), Jazz (72%) and United Airlines (72%).

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

    Looking at all options, your cheapest flight can be booked for $229. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $273 on average, our data indicates $1,259 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 $178). 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.

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$199Average$397FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$214Average$508FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$545FlexibilityNo cancel feeOn-time71%

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