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Cheap flights from Ontario to St. Louis from C$ 215

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
10 Nov — 17 Nov1
1 adult

Find flight deals from Ontario to St. Louis

Cheapest flights from Ontario to St. Louis
Explore the most affordable flight options available from Ontario to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2024.

Mon 2/123:55 p.m.YUL - STL
1 stop25h 31mMultiple Airlines
Mon 9/128:34 p.m.STL - YUL
1 stop19h 01mMultiple Airlines
Deal found 2/11C$ 478
Mon 2/124:05 p.m.YOW - STL
1 stop25h 21mMultiple Airlines
Mon 9/125:02 p.m.STL - YOW
1 stop23h 22mMultiple Airlines
Deal found 4/11C$ 512
Mon 2/122:00 p.m.YYZ - STL
3 stops27h 26mMultiple Airlines
Mon 9/125:00 p.m.STL - YYZ
3 stops29h 35mMultiple Airlines
Deal found 4/11C$ 567
Wed 4/126:30 a.m.YYZ - STL
1 stop9h 20mDelta
Wed 11/123:40 p.m.STL - YYZ
1 stop6h 10mDelta
Deal found 4/11C$ 630
Thu 5/121:50 p.m.YYZ - STL
Nonstop2h 16mUnited Airlines
Sun 8/123:50 p.m.STL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 4/11C$ 639
Thu 5/121:50 p.m.YYZ - STL
Nonstop2h 16mAir Canada
Mon 9/125:40 p.m.STL - YYZ
1 stop4h 26mAir Canada
Deal found 4/11C$ 655
Thu 5/126:20 p.m.YYZ - STL
1 stop4h 53mAmerican Airlines
Sun 8/126:16 a.m.STL - YYZ
1 stop4h 40mAmerican Airlines
Deal found 4/11C$ 674
Mon 2/126:15 p.m.YYZ - STL
1 stop15h 49mWestJet
Mon 9/123:26 p.m.STL - YYZ
2 stops28h 47mWestJet
Deal found 4/11C$ 706
Wed 25/127:30 a.m.YUL - STL
1 stop5h 41mAmerican Airlines
Tue 31/126:30 a.m.STL - YUL
1 stop4h 50mAmerican Airlines
Deal found 4/11C$ 728
Thu 5/127:55 a.m.YUL - STL
2 stops8h 39mUnited Airlines
Thu 9/16:30 a.m.STL - YUL
2 stops8h 28mUnited Airlines
Deal found 4/11C$ 763
Fri 27/126:00 a.m.YUL - STL
1 stop7h 26mAir Canada
Tue 31/125:00 a.m.STL - YUL
1 stop4h 32mAir Canada
Deal found 4/11C$ 820
Mon 2/126:45 a.m.YUL - STL
2 stops30h 12mWestJet
Fri 6/1211:25 a.m.STL - YUL
1 stop23h 33mWestJet
Deal found 3/11C$ 824

Find flights from Ontario to St. Louis within your budget

Customize your flight search to find flights from Ontario 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 503,521 searches. Data last updated 5 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 11/12

7:30 a.m.-11:24 p.m.

1 stop16h 54m

C$ 215

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 26/11

1:50 p.m.-3:06 p.m.

Nonstop2h 16m

C$ 360

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 26/11

7:45 a.m.-3:39 p.m.

2 stops8h 54m

C$ 367

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 22/11

7:50 a.m.-12:04 p.m.

1 stop5h 14m

C$ 418

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 18/11

6:20 p.m.-10:10 p.m.

1 stop4h 50m

C$ 431

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 22/11

10:45 p.m.-10:40 a.m.

2 stops12h 55m

C$ 512

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 2/12

3:55 p.m.-4:26 p.m.

1 stop25h 31m

Lambert-St Louis

Mon 9/12

8:34 p.m.-4:35 p.m.

1 stop19h 01m

C$ 478

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/12

1:50 p.m.-3:06 p.m.

Nonstop2h 16m

Lambert-St Louis

Sun 8/12

3:50 p.m.-6:45 p.m.

Nonstop1h 55m

C$ 639

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/12

1:50 p.m.-3:06 p.m.

Nonstop2h 16m

Lambert-St Louis

Mon 9/12

3:50 p.m.-6:45 p.m.

Nonstop1h 55m

C$ 642

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/12

6:00 a.m.-9:36 a.m.

1 stop4h 36m

Lambert-St Louis

Sun 8/12

6:30 a.m.-11:27 a.m.

1 stop3h 57m

C$ 658

Flights are sorted by cheapest first

Deals found on 3/11

Showing 1-10 of 24 results
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Best time to book a flight from Ontario to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Ontario 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.

Travel insights for flights from Ontario to St. Louis

Get recent, data-driven insights about flights from Ontario to St. Louis including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Region of Ontario to St. Louis?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to St. Louis (average of C$ 365). Flying from Region of Ontario 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 ON to STL?

Find hourly flight availability from Ontario 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 5 November 2024.

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

Weekly flight availability from Region of Ontario to St. Louis

Explore weekly flight availability from Ontario 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 5 November 2024.

The most flights from CAON 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).

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 5 November 2024.
See what other customers who have flown with Delta, WestJet and United Airlines from Ontario to St. Louis have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Alaska Airlines
8.0
Very good
9,421 reviews
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Delta
8.0
Very good
8,829 reviews
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

United Airlines
7.4
Good
9,226 reviews
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

WestJet
7.3
Good
2,800 reviews
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,421 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.2

Entertainment

7.1

Crew

8.5

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Related info for your journey

Find useful and relevant information for your journey from Ontario 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 Ontario?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Ontario. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

  • What are the cheapest airlines to fly from Region of Ontario to St. Louis one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 360. Users have also found prices from C$ 367 and C$ 418 on United Airlines and Delta, respectively.

  • What are the most popular routes from Region of Ontario to St. Louis?

    While some choose either Montreal Pierre Elliott Trudeau Intl - Lambert-St Louis or Ottawa - Lambert-St Louis, Toronto Pearson Intl - Lambert-St Louis is the most popular route from Region of Ontario to St. Louis.

  • What are the most reliable airlines from Region of Ontario to St. Louis?

    Consider Air Canada (79%), Jazz (79%) or United Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to St. Louis.

  • What are the cheapest flights from Region of Ontario to St. Louis?

    Looking for the cheapest flight from Region of Ontario to St. Louis? While on average our users pay C$ 529, our data indicates the cheapest price to be C$ 354. The most popular route (Toronto Pearson Intl - Lambert-St Louis), is priced around C$ 453.

  • Can I find deals for flights from Ontario to St. Louis that include hotel bookings?

    Yes. In addition to deals on Ontario to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to St. Louis.

  • Can I find deals for business class flights from Ontario to St. Louis?

    Yes. Cheapflights offers flight deals from Ontario 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 Region of Ontario to St. Louis?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to St. Louis (average of C$ 365). Flying from Region of Ontario 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.

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Alternative routes for Ontario to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to St. Louis flights
Vancouver Intl to St. Louis flights
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Pierre Elliott Trudeau Intl to Kansas City flights
Pearson Intl to Kansas City flights
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Calgary to Kansas City flights
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Regina to Branson flights
Saskatoon to St. Louis flights
Halifax to St. Louis flights
Vancouver Intl to Springfield flights
Edmonton to Columbia flights
Pierre Elliott Trudeau Intl to Cape Girardeau flights

Top 2 airlines flying from Ontario to St. Louis

Discover the top 2 airlines that operate flights from Ontario 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 503,521 searches. Data last updated 5 November 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 481AverageC$ 647FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 483AverageC$ 756FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

When you search for this flight from Ontario to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to St. Louis from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to St. Louis with no change fees?

Certainly. Search results for flights to St. Louis from Ontario 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 Ontario to St. Louis become cheaper?

Yes! Start tracking prices for Ontario to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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