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Niagara Falls

$163+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
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 Thursday or Tuesday 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 August 2, 2025.

Round-trip from

$345
(American Airlines)

One-way from

$163
(Mytrip)

Popular in

November

Cheapest in

January

Average price

$404
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. 3% potential increase in price ($16 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 August 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 August 2, 2025.

This American Airlines deal was found by Cheapflights users on 8/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:10 amSTL - YYZ
1 stop7h 21mAmerican Airlines
Sat 9/201:15 pmYYZ - STL
1 stop9h 38mAmerican Airlines
Deal found 8/1$345
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 10/179:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
Sat 10/256:30 amYYZ - STL
1 stop12h 25mMultiple Airlines
Deal found 7/31$363
This United Airlines deal was found by Cheapflights users on 7/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/27:04 pmSTL - YYZ
1 stop13h 54mUnited Airlines
Wed 9/107:00 amYYZ - STL
1 stop9h 44mUnited Airlines
Deal found 7/31$442
This Air Canada deal was found by Cheapflights users on 8/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:15 amSTL - YYZ
Nonstop1h 56mAir Canada
Sun 9/76:35 pmYYZ - STL
Nonstop2h 03mAir Canada
Deal found 8/1$554

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 August 2, 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 9/13

6:10 am-2:31 pm

1 stop7h 21m

Toronto Pearson Intl

Sat 9/20

1:15 pm-9:53 pm

1 stop9h 38m

$345

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/17

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

Sat 10/25

6:30 am-5:55 pm

1 stop12h 25m

$363

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 9/2

7:04 pm-9:58 am

1 stop13h 54m

Toronto Pearson Intl

Wed 9/10

7:00 am-3:44 pm

1 stop9h 44m

$442

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 9/5

9:15 am-12:11 pm

Nonstop1h 56m

Toronto Pearson Intl

Sun 9/7

6:35 pm-7:38 pm

Nonstop2h 03m

$554

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/3

9:50 am-2:05 pm

3 stops27h 15m

$163

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 8/23

6:00 am-5:41 pm

1 stop10h 41m

$166

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/27

9:15 am-12:15 pm

Nonstop2h 00m

$252

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/27

6:40 am-1:32 pm

1 stop5h 52m

$262

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/27

6:35 am-5:19 pm

2 stops9h 44m

$267

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 8/15

6:00 am-12:24 am

2 stops17h 24m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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 August 1, 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 August 2, 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 August 2, 2025.

The most flights from STL to NI4 are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 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 August 2, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines 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.
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,980 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,855 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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

  • What are the cheapest airlines to fly from St. Louis to Niagara Falls one-way?

    One-way options have recently been found by users for as low as $166 on American Airlines. Other airlines that offer cheap prices include Air Canada from $252 and Delta from $262 one-way.

  • 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 United Airlines (80%), Air Canada (78%) and Jazz (75%).

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

    Looking at all options, your cheapest flight can be booked for $237. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $363 on average our data indicates $1,845 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

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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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$489FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$478FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$330Average$590FlexibilityNo cancel feeOn-time71%

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