Niagara Falls

$202+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
jul. 9 — jul. 161
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Niagara Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 junio 9, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
mié. 7/87:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
dom. 7/124:45 pm
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 6/9$429
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
mié. 7/228:35 pm
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8$436
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
mié. 7/228:35 pm
YYZ
-
STL
1 stop22h 40m
Multiple Airlines
Deal found 6/8$448
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/146:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
mar. 7/217:00 am
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8$451
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
mar. 7/216:34 pm
STL
-
YYZ
2 stops16h 26m
Multiple Airlines
vie. 7/249:50 am
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 6/7$455
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
lun. 7/134:57 pm
STL
-
YYZ
2 stops27h 28m
Multiple Airlines
mar. 7/217:00 am
YYZ
-
STL
1 stop12h 05m
Multiple Airlines
Deal found 6/8$463
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
dom. 7/126:34 pm
STL
-
YYZ
2 stops21h 21m
Multiple Airlines
lun. 7/208:35 pm
YYZ
-
STL
1 stop22h 30m
Multiple Airlines
Deal found 6/8$465
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
mar. 7/287:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
jue. 8/612:55 pm
YYZ
-
STL
2 stops45h 02m
Multiple Airlines
Deal found 6/8$469
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
mié. 7/224:09 pm
STL
-
YYZ
1 stop23h 36m
Multiple Airlines
mié. 8/54:45 pm
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 6/4$470
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
vie. 7/314:57 pm
STL
-
YYZ
2 stops18h 03m
Multiple Airlines
mar. 8/49:50 am
YYZ
-
STL
1 stop15h 09m
Multiple Airlines
Deal found 6/9$472
This American Airlines deal was found by Cheapflights users on 6/9. 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.
mar. 8/49:08 am
STL
-
YYZ
1 stop7h 26m
American Airlines
mar. 8/251:15 pm
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 6/9$474
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
mar. 7/77:03 pm
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
mar. 7/146:30 am
YYZ
-
STL
2 stops12h 07m
Multiple Airlines
Deal found 6/6$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 junio 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$429
(Kiwi.com)

One-way from

$202
(Kiwi.com)

Popular in

January

Cheapest in

March

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. 4% potential increase in price ($24 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($28 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 junio 9, 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

jue. 8/13

7:10 pm-6:39 am

1 stop10h 29m

Toronto Pearson Intl

dom. 8/16

8:35 pm-6:15 pm

1 stop22h 40m

$538
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 6/25

2:15 pm-5:06 pm

Nonstop1h 51m

Toronto Pearson Intl

dom. 6/28

11:15 am-12:21 pm

Nonstop2h 06m

$599

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 7/15

6:30 am-11:19 am

1 stop3h 49m

Toronto Pearson Intl

dom. 7/19

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 10/2

10:29 am-3:15 pm

1 stop3h 46m

Toronto Pearson Intl

mié. 10/7

9:45 am-1:20 pm

1 stop4h 35m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

dom. 7/12

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

dom. 7/19

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 7/24

10:19 am-5:24 pm

1 stop6h 05m

Toronto Pearson Intl

dom. 7/26

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 7/21

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

mar. 7/28

9:45 am-1:05 pm

1 stop4h 20m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 7/16

10:19 am-3:20 pm

1 stop4h 01m

Toronto Pearson Intl

jue. 7/23

6:10 am-9:31 am

1 stop4h 21m

$606

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 7/2

1:13 pm-8:44 pm

1 stop6h 31m

Toronto Pearson Intl

lun. 7/6

12:55 pm-2:02 pm

Nonstop2h 07m

$608
Cheapest one-way

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 8/12

4:57 pm-2:05 pm

2 stops20h 08m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 junio 9, 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 junio 9, 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 junio 9, 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.

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 1h 51m. United Airlines provides one of the quickest options available for as low as $599. 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 Jazz (81%), Air Canada (66%) and United Airlines (53%).

  • 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 $448 on average, our data indicates $560 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 junio 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$218Average$556FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$236Average$586FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$270Average$545FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.