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Niagara Falls

$172+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Aug 7 — Aug 141
Fri 8/7
Fri 8/14
1 adult, Economy
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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 July 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/174:57 pm
STL
-
YYZ
2 stops20h 08m
Multiple Airlines
Thu 8/209:50 am
YYZ
-
STL
1 stop7h 21m
Multiple Airlines
Deal found 7/5$429
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 11/310:35 am
STL
-
YYZ
2 stops12h 35m
Multiple Airlines
Thu 11/56:30 am
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Deal found 7/3$432
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/37:10 pm
STL
-
YYZ
1 stop20h 59m
Multiple Airlines
Tue 8/119:30 am
YYZ
-
STL
2 stops24h 27m
Multiple Airlines
Deal found 7/7$438
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/66:34 pm
STL
-
YYZ
2 stops21h 21m
Multiple Airlines
Thu 8/138:35 pm
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 7/7$457
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 stops21h 38m
Multiple Airlines
Mon 8/317:00 am
YYZ
-
STL
1 stop11h 50m
Multiple Airlines
Deal found 7/7$458
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Fri 10/3010:35 am
STL
-
YYZ
2 stops23h 47m
Multiple Airlines
Wed 11/45:15 pm
YYZ
-
STL
1 stop27h 24m
Multiple Airlines
Deal found 7/8$462
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/44:09 pm
STL
-
YYZ
1 stop26h 56m
Multiple Airlines
Tue 8/119:30 am
YYZ
-
STL
2 stops24h 27m
Multiple Airlines
Deal found 7/5$464
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 11/610:35 am
STL
-
YYZ
2 stops8h 42m
Multiple Airlines
Mon 11/96:30 am
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Deal found 7/3$467
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 8/174:09 pm
STL
-
YYZ
1 stop26h 56m
Multiple Airlines
Mon 8/244:45 pm
YYZ
-
STL
2 stops21h 36m
Multiple Airlines
Deal found 7/3$470
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/85:00 am
STL
-
YYZ
1 stop12h 30m
American Airlines
Wed 8/121:15 pm
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 7/7$471
This American Airlines deal was found by Cheapflights users on 7/3. 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 8/256:00 am
STL
-
YYZ
1 stop7h 33m
American Airlines
Tue 9/83:14 pm
YYZ
-
STL
1 stop10h 00m
American Airlines
Deal found 7/3$475

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 July 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$403
(Kiwi.com)

One-way from

$172
(Kiwi.com)

Popular in

January

Cheapest in

December

Average price

$580
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. 2% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 8, 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

Wed 8/19

9:32 am-6:30 pm

1 stop7h 58m

Toronto Pearson Intl

Mon 8/24

6:21 pm-10:40 pm

1 stop5h 19m

$538

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 8/3

1:13 pm-8:44 pm

1 stop6h 31m

Toronto Pearson Intl

Mon 8/10

12:00 pm-6:42 pm

1 stop7h 42m

$582

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 9/15

5:30 pm-12:13 am

1 stop5h 43m

Toronto Pearson Intl

Tue 9/22

7:15 pm-8:20 pm

Nonstop2h 05m

$583

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 9/12

5:30 pm-12:13 am

1 stop5h 43m

Toronto Pearson Intl

Tue 9/15

7:15 pm-8:20 pm

Nonstop2h 05m

$583

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/30

1:08 pm-6:45 pm

1 stop4h 37m

Toronto Pearson Intl

Wed 11/4

2:10 pm-3:26 pm

Nonstop2h 16m

$587

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/8

7:30 am-1:47 pm

1 stop5h 17m

Toronto Pearson Intl

Mon 10/12

12:55 pm-2:00 pm

Nonstop2h 05m

$587

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 11/3

1:24 pm-7:23 pm

1 stop4h 59m

Toronto Pearson Intl

Thu 11/5

2:10 pm-3:26 pm

Nonstop2h 16m

$590

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 11/2

3:15 pm-9:15 pm

1 stop5h 00m

Toronto Pearson Intl

Fri 11/6

2:10 pm-3:26 pm

Nonstop2h 16m

$590
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

Wed 9/30

3:11 pm-8:44 pm

1 stop4h 33m

Toronto Pearson Intl

Sun 10/4

7:00 am-10:48 am

1 stop4h 48m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

Showing 1-10 of 23 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 July 8, 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 July 8, 2026.

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 July 8, 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.
United Airlines
7.4
Good
9,945 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Entertainment

7.1

Overall

7.4

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.
United Airlines
7.4
Good
9,945 reviews
United Airlines
7.4
Good
9,945 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Entertainment

7.1

Overall

7.4

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.
American Airlines
7.1
Good
11,784 reviews
United Airlines
7.4
Good
9,945 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Entertainment

7.1

Overall

7.4

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.
Air Canada
7.1
Good
11,319 reviews
United Airlines
7.4
Good
9,945 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Entertainment

7.1

Overall

7.4

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 4 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 13h 21m. American Airlines provides one of the quickest options available for as low as $409. 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 (70%), Jazz (68%) 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 $479 on average, our data indicates $2,046 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 July 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$247Average$614FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$253Average$616FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$545FlexibilityNo cancel feeOn-time71%

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