Niagara Falls

$163+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Jul 30 — Aug 61
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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 June 30, 2026.

This American Airlines deal was found by Cheapflights users on 6/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:21 am
STL
-
YYZ
1 stop10h 14m
American Airlines
Sat 9/196:30 am
YYZ
-
STL
1 stop15h 14m
American Airlines
Deal found 6/28$384
This American Airlines deal was found by Cheapflights users on 6/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:32 am
STL
-
YYZ
1 stop7h 58m
American Airlines
Tue 9/811:39 am
YYZ
-
STL
1 stop8h 48m
American Airlines
Deal found 6/27$396
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Mon 8/246:17 pm
STL
-
YYZ
2 stops18h 48m
Multiple Airlines
Sun 10/44:50 pm
YYZ
-
STL
1 stop27h 49m
Multiple Airlines
Deal found 6/28$403
This American Airlines deal was found by Cheapflights users on 6/29. 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.
Tue 7/216:55 am
STL
-
YYZ
1 stop9h 39m
American Airlines
Tue 7/281:17 pm
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 6/29$409
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Mon 9/2810:35 am
STL
-
YYZ
2 stops29h 20m
Multiple Airlines
Mon 10/57:45 am
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28$418
This American Airlines deal was found by Cheapflights users on 6/29. 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.
Thu 10/15:00 am
STL
-
YYZ
1 stop8h 32m
American Airlines
Wed 12/24:44 pm
YYZ
-
STL
1 stop8h 14m
American Airlines
Deal found 6/29$419
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Sun 9/1310:35 am
STL
-
YYZ
2 stops33h 20m
Multiple Airlines
Mon 9/217:45 am
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28$423
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Mon 9/1410:35 am
STL
-
YYZ
2 stops29h 20m
Multiple Airlines
Mon 9/217:45 am
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28$424
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/294:09 pm
STL
-
YYZ
1 stop23h 36m
Multiple Airlines
Sun 8/24:45 pm
YYZ
-
STL
2 stops21h 36m
Multiple Airlines
Deal found 6/27$427
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 9/108:34 pm
STL
-
YYZ
1 stop19h 11m
Multiple Airlines
Mon 9/141:30 pm
YYZ
-
STL
2 stops21h 10m
Multiple Airlines
Deal found 6/29$428
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/3010:35 am
STL
-
YYZ
2 stops33h 20m
Multiple Airlines
Mon 10/57:45 am
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 6/28$430

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 June 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$384
(American Airlines)

One-way from

$163
(American Airlines)

Popular in

January

Cheapest in

December

Average price

$600
Provider with most accurate pricing for Lambert-St Louis-Toronto (YTO) flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto (YTO) flights.
From Lambert-St Louis to Niagara Falls
One-way flight from Lambert-St Louis to Niagara Falls
Highest demand for flights based on searches. 2% potential increase in price ($17 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 June 30, 2026.
Use the filters below to find and compare flights from St. Louis to Niagara Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 7/31

4:57 pm-2:05 pm

2 stops20h 08m

Toronto Pearson Intl

Thu 8/6

7:45 am-11:46 am

1 stop5h 01m

$480

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 10/11

8:30 am-2:19 pm

1 stop4h 49m

Toronto Pearson Intl

Sun 10/11

5:27 pm-9:21 pm

1 stop4h 54m

$581

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/1

8:00 am-1:42 pm

1 stop4h 42m

Toronto Pearson Intl

Wed 12/2

2:10 pm-3:26 pm

Nonstop2h 16m

$583

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 9/18

6:40 am-3:15 pm

1 stop7h 35m

Toronto Pearson Intl

Mon 9/21

6:59 pm-8:06 am

1 stop14h 07m

$594
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 8/25

8:55 am-11:56 am

Nonstop2h 01m

Toronto Pearson Intl

Tue 9/8

12:55 pm-2:00 pm

Nonstop2h 05m

$594

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 9/13

6:40 am-11:18 am

1 stop3h 38m

Toronto Pearson Intl

Wed 9/16

7:55 am-3:36 pm

1 stop8h 41m

$594

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 9/16

6:40 am-6:09 pm

2 stops10h 29m

Toronto Pearson Intl

Sat 9/19

7:55 am-4:52 pm

1 stop9h 57m

$594

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 9/4

5:30 pm-11:59 pm

1 stop5h 29m

Toronto Pearson Intl

Mon 9/7

2:00 pm-6:42 pm

1 stop5h 42m

$594

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 9/1

5:30 pm-11:59 pm

1 stop5h 29m

Toronto Pearson Intl

Sun 9/6

12:55 pm-2:02 pm

Nonstop2h 07m

$599

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 8/13

5:30 pm-11:59 pm

1 stop5h 29m

Toronto Pearson Intl

Tue 8/18

12:55 pm-2:02 pm

Nonstop2h 07m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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

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 June 30, 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.

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 June 30, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andAir 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.

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

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 2h 01m. United Airlines provides one of the quickest options available for as low as $594. St. Louis and Niagara Falls are separated by a distance of 653 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 (73%), Jazz (70%) and United Airlines (49%).

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

    Looking at all options, your cheapest flight can be booked for $225. While the most popular route (Lambert-St Louis - Toronto Pearson Intl) can be booked for $403 on average, our data indicates $2,061 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.

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 June 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$247Average$617FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$253Average$616FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$545FlexibilityNo cancel feeOn-time71%

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