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Cheap flights from Niagara Falls, ON to St. Louis from C$ 297

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 13/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
11 Jul — 18 Jul1
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 80 days in advance, depart on a Saturday or Wednesday 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 11 June 2026.

Thu 16/72:50 p.m.
YYZ
-
STL
2 stops28h 25m
Multiple Airlines
Tue 21/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Deal found 10/6C$ 583
Tue 18/87:00 a.m.
YYZ
-
STL
1 stop12h 08m
Multiple Airlines
Sun 23/88:21 p.m.
STL
-
YYZ
2 stops23h 54m
Multiple Airlines
Deal found 9/6C$ 584
Thu 27/87:15 p.m.
YYZ
-
STL
Nonstop2h 07m
Air Canada
Thu 3/98:55 a.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Deal found 8/6C$ 585
Thu 20/83:50 p.m.
YYZ
-
STL
2 stops28h 46m
Multiple Airlines
Tue 25/86:58 p.m.
STL
-
YYZ
1 stop10h 41m
Multiple Airlines
Deal found 9/6C$ 588
Wed 22/72:50 p.m.
YYZ
-
STL
2 stops28h 25m
Multiple Airlines
Mon 27/77:10 p.m.
STL
-
YYZ
1 stop20h 59m
Multiple Airlines
Deal found 10/6C$ 591
Mon 24/82:00 p.m.
YYZ
-
STL
1 stop5h 42m
Air Canada
Tue 25/812:10 p.m.
STL
-
YYZ
1 stop6h 51m
Air Canada
Deal found 8/6C$ 594
Wed 22/712:55 p.m.
YYZ
-
STL
Nonstop2h 07m
Air Canada
Wed 29/72:40 p.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Deal found 7/6C$ 595
Sun 28/64:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Wed 1/77:46 p.m.
STL
-
YYZ
1 stop9h 53m
Multiple Airlines
Deal found 11/6C$ 601

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 11 June 2026.

Round-trip from

C$ 583

One-way from

C$ 297

Popular in

April

Cheapest in

January

Average price

C$ 672
16/7-21/7
  • 16/7-21/7
  • 3 total stops
  • 39h 01m total
  • Niagara Falls to St. Louis
Search Deals
13/7
  • 13/7
  • 3 total stops
  • 36h 05m total
  • Niagara Falls to St. Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 11 June 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

Thu 16/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

Lambert-St Louis

Tue 21/7

6:30 a.m.-1:34 p.m.

1 stop6h 04m

C$ 661

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 11/9

6:00 a.m.-1:17 p.m.

1 stop8h 17m

Lambert-St Louis

Mon 21/9

6:40 a.m.-11:18 a.m.

1 stop3h 38m

C$ 661

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 9/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

Lambert-St Louis

Sun 12/7

6:30 a.m.-3:20 p.m.

1 stop7h 50m

C$ 661

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 28/7

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

Lambert-St Louis

Wed 29/7

7:20 a.m.-1:42 p.m.

1 stop5h 22m

C$ 669
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 25/6

11:15 a.m.-12:21 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 28/6

8:40 a.m.-11:37 a.m.

Nonstop1h 57m

C$ 670

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 1/7

7:00 a.m.-12:11 p.m.

1 stop6h 11m

Lambert-St Louis

Sun 5/7

6:50 a.m.-12:35 p.m.

1 stop4h 45m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 30/6

5:15 p.m.-11:29 p.m.

1 stop7h 14m

Lambert-St Louis

Wed 1/7

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

1 stop4h 49m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 25/6

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

1 stop5h 46m

Lambert-St Louis

Wed 1/7

6:00 a.m.-1:42 p.m.

1 stop6h 42m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 24/6

7:00 a.m.-12:11 p.m.

1 stop6h 11m

Lambert-St Louis

Thu 2/7

7:20 a.m.-1:42 p.m.

1 stop5h 22m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 27/6

8:45 a.m.-12:11 p.m.

1 stop4h 26m

Lambert-St Louis

Wed 1/7

7:20 a.m.-1:42 p.m.

1 stop5h 22m

C$ 677

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/6

Showing 1-10 of 19 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 11 June 2026.

It’s typically best to fly out from Niagara Falls to St. Louis at noon. Doing so could potentially save you 24% 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 11 June 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?

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 11 June 2026.
Get a feel of what it's like to fly with United Airlines,WestJet, 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.
United Airlines
7.4
Good
9,804 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,804 reviews
United Airlines
7.4
Good
9,804 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
WestJet
7.2
Good
3,356 reviews
United Airlines
7.4
Good
9,804 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,640 reviews
United Airlines
7.4
Good
9,804 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Air Canada
7.1
Good
11,160 reviews
United Airlines
7.4
Good
9,804 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

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 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. 4 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 07m. Delta provides one of the quickest options available for as low as C$ 669. 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: Air Canada (90%), Jazz (89%), United Airlines (85%).

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

    On average you can expect to pay C$ 513 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 303 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 4 airlines flying from Niagara Falls to St. Louis

Discover the top 4 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 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 341AverageC$ 590FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 368AverageC$ 691FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 444AverageC$ 648FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 634AverageC$ 995FlexibilityNo 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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