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Cheap flights from Niagara Falls to St. Louis from C$ 241

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from Niagara Falls to Lambert-St Louis are usually found in May or August, booked 90 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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 30 April 2025.

Round-trip from

C$ 498

One-way from

C$ 260

Popular in

December

Cheapest in

May

Average price

C$ 630
10/5-12/5
  • 10/5-12/5
  • 2 total stops
  • 53h 02m total
  • Niagara Falls to St. Louis
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25/5
  • 25/5
  • 1 total stop
  • 8h 52m total
  • Niagara Falls to St. Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 April 2025.

Sat 10/56:30 a.m.YYZ - STL
1 stop27h 45mMultiple Airlines
Mon 12/59:55 p.m.STL - YYZ
1 stop25h 17mMultiple Airlines
Deal found 27/4C$ 498
Mon 23/611:30 a.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Wed 25/67:30 a.m.STL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 28/4C$ 561
Fri 30/59:49 a.m.YYZ - STL
1 stop4h 30mDelta
Sun 1/66:00 a.m.STL - YYZ
1 stop6h 40mDelta
Deal found 28/4C$ 568
Thu 22/511:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 25/52:30 p.m.STL - YYZ
Nonstop2h 00mAir Canada
Deal found 29/4C$ 577
Fri 5/96:24 p.m.YYZ - STL
1 stop6h 25mAmerican Airlines
Sun 7/95:29 a.m.STL - YYZ
1 stop8h 26mAmerican Airlines
Deal found 28/4C$ 580
Thu 22/56:30 a.m.YYZ - STL
1 stop4h 19mBritish Airways
Sun 25/56:12 a.m.STL - YYZ
2 stops7h 21mBritish Airways
Deal found 29/4C$ 642
Mon 23/68:00 p.m.YYZ - STL
2 stops14h 43mWestJet
Thu 26/610:48 a.m.STL - YYZ
1 stop5h 18mWestJet
Deal found 28/4C$ 684
Thu 15/55:29 p.m.YYZ - STL
1 stop5h 59mWestJet Encore
Mon 19/56:00 p.m.STL - YYZ
1 stop19h 33mWestJet Encore
Deal found 28/4C$ 803
Wed 28/54:45 p.m.YYZ - STL
2 stops26h 36mAlaska Airlines
Wed 4/66:00 a.m.STL - YYZ
2 stops32h 00mAlaska Airlines
Deal found 28/4C$ 1,073

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 30 April 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 10/5

6:30 a.m.-9:15 a.m.

1 stop27h 45m

Lambert-St Louis

Mon 12/5

9:55 p.m.-12:12 a.m.

1 stop25h 17m

C$ 498

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Wed 25/6

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

C$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 30/5

9:49 a.m.-1:19 p.m.

1 stop4h 30m

Lambert-St Louis

Sun 1/6

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

1 stop6h 40m

C$ 568

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 22/5

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 25/5

2:30 p.m.-5:30 p.m.

Nonstop2h 00m

C$ 577

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 5/9

6:24 p.m.-11:49 p.m.

1 stop6h 25m

Lambert-St Louis

Sun 7/9

5:29 a.m.-2:55 p.m.

1 stop8h 26m

C$ 580

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 22/5

6:30 a.m.-9:49 a.m.

1 stop4h 19m

Lambert-St Louis

Sun 25/5

6:12 a.m.-2:33 p.m.

2 stops7h 21m

C$ 642

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

8:00 p.m.-9:43 a.m.

2 stops14h 43m

Lambert-St Louis

Thu 26/6

10:48 a.m.-5:06 p.m.

1 stop5h 18m

C$ 684

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/5

5:29 p.m.-10:28 p.m.

1 stop5h 59m

Lambert-St Louis

Mon 19/5

6:00 p.m.-2:33 p.m.

1 stop19h 33m

C$ 803

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 27/5

4:45 p.m.-7:29 p.m.

2 stops27h 44m

Lambert-St Louis

Tue 3/6

6:18 p.m.-10:51 a.m.

2 stops15h 33m

C$ 1,030

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 25/5

4:00 p.m.-11:52 p.m.

1 stop8h 52m

C$ 241

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 13 results
1
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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 25 April 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 30 April 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 30 April 2025.
To help decide which airline to fly from Niagara Falls to St. Louis, see what other customers have to say about Alaska Airlines, Delta and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,826 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 0 inbound flights from Niagara Falls per day. 3 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 Air Canada, with whom users have recently found tickets for as low as C$ 327. However, be on the lookout for offers from United Airlines and WestJet, 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: Air Canada (79%), Jazz (79%), United Airlines (79%).

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

    On average you can expect to pay C$ 441 for a flight from Niagara Falls to St. Louis. The cheapest flight overall is C$ 294 while the most popular route, (Toronto Pearson Intl - Lambert-St Louis) is currently priced at C$ 484.

  • 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 Niagara Falls?

Book flights to Niagara Falls if you plan to visit one of these locations
Chesterfield
St. Peters

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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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 514AverageC$ 685FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 546AverageC$ 679FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 611AverageC$ 755FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Niagara Falls to St. Louis?

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Why should you use Cheapflights to find cheap flight tickets from Niagara Falls to St. Louis?

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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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