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Cheap flights from Niagara Falls to St. Louis from C$ 240

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 25/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
5 Aug — 12 Aug1
1 adult

Cheapflights Tip: The best prices from Niagara Falls to Lambert-St Louis are usually found in June or May, booked 85 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap 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 31 July 2025.

Round-trip from

C$ 443

One-way from

C$ 240

Popular in

December

Cheapest in

June

Average price

C$ 658
American Airlines
  • American Airlines
  • 8/11-15/11
  • 2 total stops
  • 17h 16m total
  • Niagara Falls to St. Louis
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25/10
  • 25/10
  • 1 total stop
  • 12h 25m total
  • Niagara Falls to St. Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Niagara Falls to St. Louis

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 31 July 2025.

Sat 8/114:44 p.m.YYZ - STL
1 stop8h 12mAmerican Airlines
Sat 15/116:00 a.m.STL - YYZ
1 stop9h 04mAmerican Airlines
Deal found 29/7C$ 443
Fri 12/92:15 p.m.YYZ - STL
Nonstop2h 03mAir Canada
Sun 14/94:05 p.m.STL - YYZ
Nonstop1h 55mAir Canada
Deal found 29/7C$ 486
Mon 8/96:04 a.m.YYZ - STL
1 stop11h 45mDelta
Thu 11/96:05 a.m.STL - YYZ
1 stop9h 03mDelta
Deal found 29/7C$ 561
Sun 7/96:45 a.m.YYZ - STL
2 stops18h 14mMultiple Airlines
Thu 11/910:35 a.m.STL - YYZ
1 stop9h 20mMultiple Airlines
Deal found 29/7C$ 575
Tue 26/87:00 a.m.YYZ - STL
3 stops14h 46mUnited Airlines
Tue 2/95:30 p.m.STL - YYZ
1 stop5h 28mUnited Airlines
Deal found 29/7C$ 632
Mon 18/86:07 p.m.YYZ - STL
1 stop6h 07mWestJet
Thu 21/86:00 a.m.STL - YYZ
2 stops11h 04mWestJet
Deal found 28/7C$ 652

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 31 July 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

Sat 8/11

4:44 p.m.-11:56 p.m.

1 stop8h 12m

Lambert-St Louis

Sat 15/11

6:00 a.m.-4:04 p.m.

1 stop9h 04m

C$ 443

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 14/9

4:05 p.m.-7:00 p.m.

Nonstop1h 55m

C$ 486

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 8/9

6:04 a.m.-4:49 p.m.

1 stop11h 45m

Lambert-St Louis

Thu 11/9

6:05 a.m.-4:08 p.m.

1 stop9h 03m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 7/9

6:45 a.m.-11:59 p.m.

2 stops18h 14m

Lambert-St Louis

Thu 11/9

10:35 a.m.-8:55 p.m.

1 stop9h 20m

C$ 575

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 26/8

7:00 a.m.-8:46 p.m.

3 stops14h 46m

Lambert-St Louis

Tue 2/9

5:30 p.m.-11:58 p.m.

1 stop5h 28m

C$ 632

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 18/8

6:07 p.m.-11:14 p.m.

1 stop6h 07m

Lambert-St Louis

Thu 21/8

6:00 a.m.-6:04 p.m.

2 stops11h 04m

C$ 652

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/10

6:30 a.m.-5:55 p.m.

1 stop12h 25m

C$ 240

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 3/9

6:30 a.m.-8:32 p.m.

1 stop15h 02m

C$ 262

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

C$ 290

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 3/9

10:05 a.m.-9:32 p.m.

2 stops12h 27m

C$ 316

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Showing 1-10 of 12 results
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

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 25 July 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 84 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, January is the cheapest month in which you can book a flight from Niagara Falls to St. Louis (average of C$ 365). Flying from Niagara Falls to St. Louis in September is currently the most expensive (average of C$ 491). 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 31 July 2025.

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 31 July 2025.

The most flights from NI4 to STL are scheduled on a Monday (4 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (2 on average).

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 31 July 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.
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,902 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,977 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,842 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 3 inbound flights from Niagara Falls per day. 4 airlines have flights to Lambert-St Louis from Niagara Falls on a regular basis.

  • What are the cheapest airlines to fly from Niagara Falls to St. Louis one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as C$ 262. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from Niagara Falls to St. Louis for a low price.

  • 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 (82%), Air Canada (81%), United Airlines (72%).

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

    On average you can expect to pay C$ 626 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 302 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 473.

  • 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, January is the cheapest month in which you can book a flight from Niagara Falls to St. Louis (average of C$ 365). Flying from Niagara Falls to St. Louis in September is currently the most expensive (average of C$ 491). 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.

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
St. Peters

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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 31 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 471AverageC$ 677FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 474AverageC$ 612FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 478AverageC$ 675FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 557AverageC$ 868FlexibilityNo 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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