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Cheap flights from Niagara Falls to St. Louis from C$ 255

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Niagara Falls to Lambert-St Louis are usually found in January or February, booked 53 days in advance, depart on a Saturday 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 27 July 2026.

Mon 14/93:13 p.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Mon 21/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 26/7C$ 457
Tue 8/91:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Fri 11/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 26/7C$ 464
Thu 10/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Thu 17/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 26/7C$ 471
Thu 17/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Mon 21/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 27/7C$ 472
Thu 27/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Mon 31/86:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 22/7C$ 487
Sat 22/83:13 p.m.
YYZ
-
STL
1 stop9h 45m
American Airlines
Sat 29/85:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Deal found 23/7C$ 499
Thu 20/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Sat 29/85:00 a.m.
STL
-
YYZ
1 stop12h 30m
American Airlines
Deal found 25/7C$ 515
Mon 17/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Wed 19/86:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 27/7C$ 526
Thu 29/105:15 p.m.
YYZ
-
STL
1 stop27h 24m
Multiple Airlines
Tue 3/1110:35 a.m.
STL
-
YYZ
2 stops12h 35m
Multiple Airlines
Deal found 23/7C$ 563
Thu 20/87:20 a.m.
YYZ
-
STL
1 stop10h 03m
American Airlines
Thu 27/86:00 a.m.
STL
-
YYZ
1 stop9h 45m
American Airlines
Deal found 23/7C$ 584
Mon 14/94:45 p.m.
YYZ
-
STL
2 stops21h 36m
Multiple Airlines
Mon 21/95:19 p.m.
STL
-
YYZ
1 stop22h 26m
Multiple Airlines
Deal found 27/7C$ 616

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 27 July 2026.

Round-trip from

C$ 457

One-way from

C$ 255

Popular in

April

Cheapest in

January

Average price

C$ 774
American Airlines
  • American Airlines
  • 14/9-21/9
  • 2 total stops
  • 20h 28m total
  • Niagara Falls to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 7h 46m total
  • Niagara Falls to St. Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 54 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 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 27 July 2026.
Use the filters below to find and compare flights from Niagara Falls to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 15/9

11:00 a.m.-10:00 p.m.

1 stop12h 00m

Lambert-St Louis

Wed 16/9

8:30 a.m.-5:01 p.m.

1 stop7h 31m

C$ 644

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 27/8

11:39 a.m.-7:27 p.m.

1 stop8h 48m

Lambert-St Louis

Thu 3/9

6:00 a.m.-4:45 p.m.

1 stop9h 45m

C$ 661

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 14/9

7:15 p.m.-8:20 p.m.

Nonstop2h 05m

Lambert-St Louis

Mon 21/9

8:30 a.m.-5:01 p.m.

1 stop7h 31m

C$ 752

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 23/8

2:00 p.m.-6:42 p.m.

1 stop5h 42m

Lambert-St Louis

Sun 30/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

C$ 762

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 23/8

8:50 a.m.-12:02 p.m.

1 stop4h 12m

Lambert-St Louis

Sun 30/8

8:00 a.m.-3:46 p.m.

1 stop6h 46m

C$ 766

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 21/8

5:27 p.m.-10:59 p.m.

1 stop6h 32m

Lambert-St Louis

Fri 28/8

8:00 a.m.-3:46 p.m.

1 stop6h 46m

C$ 766
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 29/10

2:10 p.m.-3:26 p.m.

Nonstop2h 16m

Lambert-St Louis

Tue 3/11

4:05 p.m.-7:05 p.m.

Nonstop2h 00m

C$ 805

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 27/8

8:00 p.m.-9:54 a.m.

2 stops14h 54m

Lambert-St Louis

Thu 3/9

7:00 a.m.-1:05 a.m.

2 stops17h 05m

C$ 812
Cheapest one-way

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 7/9

4:45 p.m.-1:31 p.m.

2 stops21h 46m

C$ 293

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 25/9

3:13 p.m.-12:27 a.m.

1 stop10h 14m

C$ 365

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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

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 27 July 2026.

It’s typically best to fly out from Niagara Falls to St. Louis at noon. Doing so could potentially save you 27% on the flight price compared to flying in the afternoon, which is usually more expensive.

Weekly flight availability from Niagara Falls to St. Louis

Explore weekly flight availability from Niagara Falls to St. Louis. 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 27 July 2026.

The most flights from NI4 to STL 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 Niagara Falls to St. Louis?

Airfare is below average for this route at the moment.
Niagara Falls to St. Louis flights typically cost between C$ 594 and C$ 894 in September.
The cheapest round-trip price found within the last 5 days was C$ 457 on American Airlines (14 Sep-21 Sep).

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 27 July 2026.
Get a feel of what it's like to fly with United Airlines,American Airlines, andAir Canada 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.
United Airlines
7.4
Good
10,045 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
10,045 reviews
United Airlines
7.4
Good
10,045 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
American Airlines
7.1
Good
11,837 reviews
United Airlines
7.4
Good
10,045 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
11,393 reviews
United Airlines
7.4
Good
10,045 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 4 inbound flights from Niagara Falls per day. 3 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 48m. United Airlines provides one of the quickest options available for as low as C$ 661. There are 1051 km between Niagara Falls and St. Louis. This flight may include one or multiple stops.

  • 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: Jazz (84%), Air Canada (83%), United Airlines (68%).

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

    On average you can expect to pay C$ 783 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 632 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 623.

  • 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.

See more FAQs

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield

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Top 3 airlines flying from Niagara Falls to St. Louis

Discover the top 3 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 27 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 345AverageC$ 589FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 373AverageC$ 700FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 450AverageC$ 654FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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?

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