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Cheap flights from Niagara Falls, ON to St. Louis from C$ 230

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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
18 May — 25 May1
1 adult
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 72 days in advance, depart on a Thursday or Saturday and return on a Thursday

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 18 April 2026.

Wed 27/511:39 a.m.
YYZ
-
STL
1 stop9h 51m
American Airlines
Wed 10/66:00 a.m.
STL
-
YYZ
1 stop7h 28m
American Airlines
Deal found 17/4C$ 410
Wed 6/53:13 p.m.
YYZ
-
STL
1 stop8h 04m
American Airlines
Tue 12/52:33 p.m.
STL
-
YYZ
1 stop7h 56m
American Airlines
Deal found 15/4C$ 428
Sat 23/57:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Sat 30/55:27 p.m.
STL
-
YYZ
2 stops20h 33m
Multiple Airlines
Deal found 15/4C$ 536
Sat 23/53:10 p.m.
YYZ
-
STL
1 stop9h 44m
American Airlines
Sat 30/56:00 a.m.
STL
-
YYZ
1 stop10h 44m
American Airlines
Deal found 15/4C$ 540
Sun 17/56:15 a.m.
YYZ
-
STL
1 stop8h 48m
American Airlines
Tue 19/55:51 a.m.
STL
-
YYZ
1 stop7h 42m
American Airlines
Deal found 16/4C$ 542
Wed 6/57:00 p.m.
YYZ
-
STL
Nonstop2h 09m
Air Canada
Tue 12/57:05 a.m.
STL
-
YYZ
Nonstop1h 51m
Air Canada
Deal found 17/4C$ 553
Thu 11/67:45 a.m.
YYZ
-
STL
1 stop17h 24m
Multiple Airlines
Tue 16/66:31 p.m.
STL
-
YYZ
2 stops24h 34m
Multiple Airlines
Deal found 18/4C$ 560
Tue 26/59:50 a.m.
YYZ
-
STL
1 stop15h 07m
Multiple Airlines
Thu 28/59:21 p.m.
STL
-
YYZ
2 stops25h 14m
Multiple Airlines
Deal found 15/4C$ 561

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 18 April 2026.

Round-trip from

C$ 410

One-way from

C$ 230

Popular in

April

Cheapest in

June

Average price

C$ 1,096
American Airlines
  • American Airlines
  • 27/5-10/6
  • 2 total stops
  • 17h 19m total
  • Niagara Falls to St. Louis
Search Deals
29/5
  • 29/5
  • 1 total stop
  • 17h 12m total
  • Niagara Falls to St. Louis
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 18 April 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
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 23/5

7:00 p.m.-8:09 p.m.

Nonstop2h 09m

Lambert-St Louis

Sun 31/5

7:05 a.m.-9:56 a.m.

Nonstop1h 51m

C$ 553

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 27/5

4:00 p.m.-8:25 p.m.

1 stop5h 25m

Lambert-St Louis

Wed 10/6

2:15 p.m.-5:13 p.m.

Nonstop1h 58m

C$ 565

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 23/5

11:00 a.m.-3:46 p.m.

1 stop5h 46m

Lambert-St Louis

Sun 31/5

6:00 a.m.-11:49 a.m.

1 stop4h 49m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 17/5

2:20 p.m.-5:16 p.m.

1 stop3h 56m

Lambert-St Louis

Sun 24/5

6:00 a.m.-1:40 p.m.

1 stop6h 40m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/6

6:30 a.m.-10:32 a.m.

1 stop5h 02m

Lambert-St Louis

Mon 8/6

9:21 a.m.-5:19 p.m.

1 stop6h 58m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 11/6

5:15 p.m.-9:16 p.m.

1 stop5h 01m

Lambert-St Louis

Tue 16/6

9:23 a.m.-3:46 p.m.

1 stop5h 23m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 27/5

6:30 a.m.-10:32 a.m.

1 stop5h 02m

Lambert-St Louis

Wed 10/6

9:21 a.m.-5:19 p.m.

1 stop6h 58m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 21/8

12:00 p.m.-6:42 p.m.

1 stop7h 42m

Lambert-St Louis

Tue 25/8

12:10 p.m.-7:01 p.m.

1 stop5h 51m

C$ 598

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 21/8

2:15 p.m.-4:49 p.m.

1 stop3h 34m

Lambert-St Louis

Tue 25/8

6:33 p.m.-8:05 p.m.

2 stops24h 32m

C$ 644

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/6

8:50 a.m.-12:11 p.m.

1 stop4h 21m

Lambert-St Louis

Sat 6/6

1:13 p.m.-8:44 p.m.

1 stop6h 31m

C$ 644

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 10 April 2026.

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 72 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 18 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Niagara Falls to St. Louis as you normally would.

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 18 April 2026.

The most flights from NI4 to STL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 18 April 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andWestJet 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.
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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.
Delta
7.9
Good
8,423 reviews
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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.
United Airlines
7.4
Good
9,603 reviews
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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.
WestJet
7.2
Good
3,321 reviews
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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.
American Airlines
7.1
Good
11,607 reviews
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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.
Air Canada
7.1
Good
10,935 reviews
Delta
7.9
Good
8,423 reviews
Check prices

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

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 2 inbound flights 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 2h 09m. Air Canada provides one of the quickest options available for as low as C$ 553. 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: United Airlines (84%), Air Canada (83%), Jazz (83%).

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

    On average you can expect to pay C$ 1,266 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 789 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 583.

  • 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 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 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 329AverageC$ 573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 361AverageC$ 679FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 454AverageC$ 594FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 470AverageC$ 607FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 552AverageC$ 976FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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