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Niagara Falls

$105+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Dec 11 — Dec 181
Thu 12/11
Thu 12/18
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 November 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/73:30 pmSTL - YYZ
1 stop19h 13mMultiple Airlines
Sun 12/148:20 pmYYZ - STL
1 stop13h 39mMultiple Airlines
Deal found 11/8$283
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/93:30 pmSTL - YYZ
1 stop21h 43mMultiple Airlines
Tue 12/167:15 amYYZ - STL
1 stop16h 18mMultiple Airlines
Deal found 11/11$284
This American Airlines deal was found by Cheapflights users on 11/9. 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 12/246:00 amSTL - YYZ
2 stops9h 39mAmerican Airlines
Wed 12/314:40 pmYYZ - STL
1 stop16h 55mAmerican Airlines
Deal found 11/9$285
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/73:30 pmSTL - YYZ
1 stop19h 13mMultiple Airlines
Wed 12/105:15 pmYYZ - STL
1 stop30h 18mMultiple Airlines
Deal found 11/8$286
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/123:30 pmSTL - YYZ
1 stop30h 05mMultiple Airlines
Wed 1/77:15 amYYZ - STL
2 stops16h 18mMultiple Airlines
Deal found 11/10$293
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 12/1112:04 pmSTL - YYZ
2 stops25h 09mMultiple Airlines
Sun 12/148:00 pmYYZ - STL
1 stop13h 59mMultiple Airlines
Deal found 11/9$299

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 November 11, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Kiwi.com)

One-way from

$105
(Trip.com)

Popular in

October

Cheapest in

January

Average price

$624
Provider with most accurate pricing for Lambert-St Louis-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto (YTO) flights.
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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. 17% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 11, 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

Tue 12/9

3:30 pm-2:13 pm

1 stop21h 43m

Toronto Pearson Intl

Tue 12/16

7:15 am-10:33 pm

1 stop16h 18m

$284

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/12

3:30 pm-10:35 pm

1 stop30h 05m

Toronto Pearson Intl

Wed 1/7

7:15 am-10:33 pm

2 stops16h 18m

$293

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 12/30

11:51 am-3:17 pm

1 stop26h 26m

Toronto Pearson Intl

Fri 2/6

7:10 am-10:33 pm

1 stop16h 23m

$337

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 12/30

11:51 am-3:17 pm

1 stop26h 26m

Toronto Pearson Intl

Sun 2/1

7:15 am-10:33 pm

1 stop16h 18m

$359

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 12/7

7:12 am-6:28 pm

1 stop10h 16m

Toronto Pearson Intl

Thu 12/11

1:10 pm-11:38 pm

1 stop11h 28m

$421

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 3/3

7:41 am-4:02 pm

1 stop7h 21m

Toronto Pearson Intl

Wed 3/4

3:30 pm-10:59 pm

1 stop8h 29m

$424

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 3/14

12:58 pm-7:00 pm

1 stop5h 02m

Toronto Pearson Intl

Wed 3/18

1:05 pm-9:48 pm

1 stop9h 43m

$426

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/23

6:30 am-4:39 pm

1 stop9h 09m

Toronto Pearson Intl

Mon 2/23

9:00 pm-9:00 pm

1 stop25h 00m

$451

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/9

9:57 am-4:02 pm

1 stop5h 05m

Toronto Pearson Intl

Mon 2/9

7:40 pm-10:13 am

1 stop15h 33m

$470

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 1/9

8:45 am-7:16 pm

1 stop9h 31m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 16 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 November 7, 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 October is currently the most expensive (average of $516). 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 November 11, 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 November 11, 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
9,012 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

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
9,012 reviews
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

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
11,047 reviews
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

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
10,437 reviews
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

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 is 1 flight 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 (95%), Jazz (95%) and United Airlines (95%).

  • 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 $264 on average, our data indicates $1,501 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 October is currently the most expensive (average of $516). 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 November 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$529FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$221Average$530FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$579FlexibilityNo cancel feeOn-time71%

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