Cheap flights from Niagara Falls, ON to St. Louis from C$ 203
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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
11 Jan — 18 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Niagara Falls to Lambert-St Louis are usually found in June or May, booked 65 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from Niagara Falls to St. Louis
Enter your travel dates to find the best prices.
Cheapest flights from Niagara Falls to St. Louis
Explore the most affordable flight options available from Niagara Falls to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.
Wed 31/127:40 a.m.YYZ - STL
1 stop28h 16mMultiple Airlines
Wed 7/15:11 p.m.STL - YYZ
2 stops26h 00mMultiple Airlines
Deal found 11/12C$ 476
Fri 26/1210:56 a.m.YYZ - STL
1 stop11h 49mAmerican Airlines
Fri 2/15:30 a.m.STL - YYZ
1 stop10h 59mAmerican Airlines
Deal found 10/12C$ 550
Wed 31/122:15 p.m.YYZ - STL
1 stop6h 03mAir Canada
Wed 7/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 11/12C$ 619
Sat 20/129:00 a.m.YYZ - STL
1 stop6h 26mUnited Airlines
Sat 10/19:57 a.m.STL - YYZ
1 stop13h 02mUnited Airlines
Deal found 10/12C$ 707
Wed 24/125:30 p.m.YYZ - STL
1 stop6h 13mUnited Airlines
Mon 29/126:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Deal found 10/12C$ 765
Sun 28/126:50 a.m.YYZ - STL
1 stop6h 37mAir Canada
Thu 1/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 9/12C$ 782
Sun 28/126:00 a.m.YYZ - STL
1 stop8h 14mAmerican Airlines
Thu 1/15:00 a.m.STL - YYZ
1 stop5h 09mAmerican Airlines
Deal found 9/12C$ 794
Tue 23/126:50 a.m.YYZ - STL
1 stop12h 04mUnited Airlines
Fri 9/18:05 a.m.STL - YYZ
1 stop6h 57mUnited Airlines
Deal found 11/12C$ 832
Best flights from Niagara Falls to St. Louis
Discover carefully curated flight deals from Niagara Falls to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 December 2025.
Thu 5/37:10 a.m.YYZ - STL
1 stop16h 23mMultiple Airlines
Sun 8/310:44 p.m.STL - YYZ
1 stop30h 36mMultiple Airlines
Deal found 9/12C$ 459
Tue 24/26:00 a.m.YYZ - STL
1 stop8h 54mAmerican Airlines
Sat 28/210:04 a.m.STL - YYZ
1 stop4h 58mAmerican Airlines
Deal found 9/12C$ 480
Thu 26/32:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Tue 31/34:05 p.m.STL - YYZ
Nonstop1h 57mAir Canada
Deal found 10/12C$ 516
Sat 10/17:15 a.m.YYZ - STL
2 stops16h 18mMultiple Airlines
Mon 12/11:07 p.m.STL - YYZ
1 stop16h 40mMultiple Airlines
Deal found 11/12C$ 469
Mon 12/16:00 a.m.YYZ - STL
1 stop5h 20mAmerican Airlines
Wed 14/16:44 p.m.STL - YYZ
1 stop15h 09mAmerican Airlines
Deal found 10/12C$ 508
Thu 8/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Mon 12/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/12C$ 538
Sat 10/17:55 p.m.YYZ - STL
1 stop16h 44mMultiple Airlines
Sat 17/15:11 p.m.STL - YYZ
1 stop19h 54mMultiple Airlines
Deal found 11/12C$ 506
Tue 24/22:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Sat 28/24:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 9/12C$ 538
Direct flights from Niagara Falls to St. Louis
Explore direct flight options from Niagara Falls to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 December 2025.
Fri 6/32:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Sun 8/34:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 11/12C$ 516
Tue 24/22:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Sat 28/24:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/12C$ 538
Thu 8/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Mon 12/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 11/12C$ 541
Sat 25/42:10 p.m.YYZ - STL
Nonstop2h 14mAir Canada
Sun 26/44:05 p.m.STL - YYZ
Nonstop1h 57mAir Canada
Deal found 11/12C$ 619
Tue 13/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Thu 15/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/12C$ 647
Thu 2/42:10 p.m.YYZ - STL
Nonstop2h 14mAir Canada
Mon 6/44:05 p.m.STL - YYZ
Nonstop1h 57mAir Canada
Deal found 11/12C$ 655
Sat 23/511:00 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 24/57:30 a.m.STL - YYZ
Nonstop1h 51mAir Canada
Deal found 11/12C$ 718
Sat 31/12:00 p.m.YYZ - STL
Nonstop2h 29mUnited Airlines
Sun 1/24:05 p.m.STL - YYZ
Nonstop2h 01mUnited Airlines
Deal found 11/12C$ 793
Tue 13/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Wed 14/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 11/12C$ 803
Sun 28/122:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Thu 1/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 9/12C$ 805
Last-minute flights from Niagara Falls to St. Louis
Discover last-minute flight deals from Niagara Falls to St. Louis. Data last updated 12 December 2025 and is based on user searches.
Wed 31/127:40 a.m.YYZ - STL
1 stop28h 16mMultiple Airlines
Wed 7/15:11 p.m.STL - YYZ
2 stops26h 00mMultiple Airlines
Deal found 11/12C$ 476
Sat 10/17:55 p.m.YYZ - STL
1 stop16h 44mMultiple Airlines
Sat 17/15:11 p.m.STL - YYZ
2 stops26h 00mMultiple Airlines
Deal found 11/12C$ 405
Sat 10/17:55 p.m.YYZ - STL
1 stop16h 44mMultiple Airlines
Mon 12/11:07 p.m.STL - YYZ
1 stop16h 40mMultiple Airlines
Deal found 11/12C$ 415
Mon 12/17:15 a.m.YYZ - STL
1 stop16h 18mMultiple Airlines
Wed 14/18:32 p.m.STL - YYZ
2 stops16h 44mMultiple Airlines
Deal found 11/12C$ 458
Mon 12/16:00 a.m.YYZ - STL
1 stop5h 20mAmerican Airlines
Wed 14/16:44 p.m.STL - YYZ
1 stop15h 09mAmerican Airlines
Deal found 10/12C$ 508
Fri 23/12:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Fri 30/14:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/12C$ 516
Fri 23/17:04 p.m.YYZ - STL
1 stop16h 16mAmerican Airlines
Fri 30/16:00 a.m.STL - YYZ
1 stop3h 53mAmerican Airlines
Deal found 10/12C$ 536
Tue 27/111:30 a.m.YYZ - STL
1 stop10h 45mAmerican Airlines
Sun 15/27:01 a.m.STL - YYZ
1 stop5h 02mAmerican Airlines
Deal found 11/12C$ 496
One-way flights from Niagara Falls to St. Louis
Search for one-way flight options from Niagara Falls to St. Louis. Find affordable one-way fares based on user searches. Data last updated 12 December 2025.
Wed 4/27:15 a.m.YYZ - STL
1 stop17h 18mMultiple Airlines
Deal found 11/12C$ 203
Thu 5/28:20 p.m.YYZ - STL
1 stop15h 03mMultiple Airlines
Deal found 11/12C$ 204
Mon 26/12:15 p.m.YYZ - STL
2 stops41h 36mMultiple Airlines
Deal found 11/12C$ 223
Fri 6/27:10 a.m.YYZ - STL
1 stop17h 23mMultiple Airlines
Deal found 11/12C$ 230
Sat 24/13:15 p.m.YYZ - STL
2 stops40h 36mMultiple Airlines
Deal found 11/12C$ 259
Thu 5/211:35 a.m.YYZ - STL
1 stop7h 39mAmerican Airlines
Deal found 11/12C$ 276
Find flight deals from Niagara Falls to St. Louis
Keep the following information in mind while searching for Niagara Falls to St. Louis flight deals. Data was last updated 12 December 2025.
Customize your flight search to find flights from Niagara Falls to St. Louis 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 629,999 searches. Data last updated 12 December 2025.
Use the filters below to find and compare flights from Niagara Falls to St. Louis that are best for you.
Fly from
Niagara Falls
Fly to
St. Louis
Route
Depart
Return
Price
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Thu 5/3
7:10 a.m.-10:33 p.m.
1 stop16h 23m
Lambert-St Louis
Sun 8/3
10:44 p.m.-6:20 a.m.
1 stop30h 36m
C$ 459
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Sat 10/1
7:15 a.m.-10:33 p.m.
2 stops16h 18m
Lambert-St Louis
Mon 12/1
1:07 p.m.-6:47 a.m.
1 stop16h 40m
C$ 469
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Tue 24/2
6:00 a.m.-1:54 p.m.
1 stop8h 54m
Lambert-St Louis
Sat 28/2
10:04 a.m.-4:02 p.m.
1 stop4h 58m
C$ 480
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Sat 10/1
7:55 p.m.-11:39 a.m.
1 stop16h 44m
Lambert-St Louis
Sat 17/1
5:11 p.m.-2:05 p.m.
1 stop19h 54m
C$ 506
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Mon 12/1
6:00 a.m.-10:20 a.m.
1 stop5h 20m
Lambert-St Louis
Wed 14/1
6:44 p.m.-10:53 a.m.
1 stop15h 09m
C$ 508
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Thu 26/3
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
Lambert-St Louis
Tue 31/3
4:05 p.m.-7:02 p.m.
Nonstop1h 57m
C$ 516
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Thu 8/1
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
Lambert-St Louis
Mon 12/1
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
C$ 538
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Tue 24/2
2:00 p.m.-3:29 p.m.
Nonstop2h 29m
Lambert-St Louis
Sat 28/2
4:05 p.m.-7:06 p.m.
Nonstop2h 01m
C$ 538
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Wed 4/2
7:15 a.m.-11:33 p.m.
1 stop17h 18m
C$ 203
TorontoSt. Louis
YYZ - STL
YYZSTL
Toronto Pearson Intl
Mon 26/1
2:15 p.m.-6:51 a.m.
2 stops41h 36m
C$ 223
Flights are sorted by cheapest round-trip flights first.
Deals found on 11/12
Showing 1-10 of 17 results
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Best time to book a flight from Niagara Falls to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Niagara Falls 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 Niagara Falls to St. Louis
How far ahead should I book a flight from Niagara Falls to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Niagara Falls to St. Louis. Price data was last updated on 5 December 2025.
The price you pay for your flight from Niagara Falls to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Niagara Falls to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Niagara Falls to St. Louis (average of C$ 343). Flying from Niagara Falls to St. Louis in April is currently the most expensive (average of C$ 514). 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 NI4 to STL?
Find hourly flight availability from Niagara Falls to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.
It’s typically best to fly out from Niagara Falls to St. Louis in the afternoon. Doing so could potentially save you 33% on the flight price compared to flying in the morning, which is usually more expensive.
How much does it cost to fly round-trip from Niagara Falls to St. Louis?
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated 12 December 2025.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from Niagara Falls to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Related info for your journey
Find useful and relevant information for your journey from Niagara Falls to St. Louis. 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 into for flights to St. Louis from Niagara Falls?
For a flight from Niagara Falls to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 20.4 km from the centre of the city. Lambert-St Louis is the only St. Louis airport and it handles 1 inbound flight from Niagara Falls per day. 5 airlines have flights to Lambert-St Louis from Niagara Falls on a regular basis.
How long is the flight from Niagara Falls to St. Louis?
A quick flight from Niagara Falls to St. Louis can take about 8h 54m. American Airlines provides one of the quickest options available for as low as C$ 480. There are 1051 km between Niagara Falls and St. Louis.
What are the most reliable airlines from Niagara Falls to St. Louis?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Niagara Falls to St. Louis on time: United Airlines (84%), Air Canada (81%), Jazz (81%).
What are the cheapest flights from Niagara Falls to St. Louis?
On average you can expect to pay C$ 576 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 476 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 405.
Can I find deals for flights from Niagara Falls to St. Louis that include hotel bookings?
Yes. In addition to deals on Niagara Falls to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Niagara Falls to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Niagara Falls to St. Louis.
Can I find deals for business class flights from Niagara Falls to St. Louis?
Yes. Cheapflights offers flight deals from Niagara Falls to St. Louis 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 Niagara Falls to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Niagara Falls to St. Louis (average of C$ 343). Flying from Niagara Falls to St. Louis in April is currently the most expensive (average of C$ 514). 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.
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
Top 5 airlines flying from Niagara Falls to St. Louis
Discover the top 5 airlines that operate flights from Niagara Falls to St. Louis. 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 629,999 searches. Data last updated 12 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Niagara Falls to St. Louis?
Deals for Niagara Falls to St. Louis flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Niagara Falls to St. Louis?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Niagara Falls to St. Louis for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Niagara Falls to St. Louis with no change fees?
Certainly. Search results for flights to St. Louis from Niagara Falls shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Niagara Falls to St. Louis become cheaper?
Of course! You can now track prices for flights from Niagara Falls to St. Louis and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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