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St. Louis

$155+ Cheap flights from Ontario to St. Louis (STL)

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
nov. 9 — nov. 161
1 adult
sáb. 11/9
sáb. 11/16
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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 noviembre 4, 2024.

This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/23:55 pmYUL - STL
1 stop25h 31mMultiple Airlines
lun. 12/98:34 pmSTL - YUL
1 stop19h 01mMultiple Airlines
Deal found 11/2$344
This Kiwi.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/24:05 pmYOW - STL
1 stop25h 21mMultiple Airlines
lun. 12/95:02 pmSTL - YOW
1 stop23h 22mMultiple Airlines
Deal found 11/4$368
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/147:05 amYYZ - STL
1 stop10h 29mMultiple Airlines
dom. 11/175:29 pmSTL - YYZ
1 stop29h 38mMultiple Airlines
Deal found 11/2$393
This United Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/51:50 pmYYZ - STL
Nonstop2h 16mUnited Airlines
lun. 12/93:50 pmSTL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 11/4$460
This Air Canada deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/51:50 pmYYZ - STL
Nonstop2h 16mAir Canada
lun. 12/93:50 pmSTL - YYZ
Nonstop1h 55mAir Canada
Deal found 11/3$462
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/56:00 amYYZ - STL
1 stop4h 36mDelta
dom. 12/86:30 amSTL - YYZ
1 stop3h 57mDelta
Deal found 11/3$473
This American Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/151:14 pmYYZ - STL
1 stop4h 11mAmerican Airlines
dom. 12/2210:16 amSTL - YYZ
1 stop10h 09mAmerican Airlines
Deal found 11/3$483
This Justfly.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/26:15 pmYYZ - STL
1 stop15h 49mWestJet
lun. 12/93:26 pmSTL - YYZ
2 stops28h 47mWestJet
Deal found 11/4$508
This American Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/257:30 amYUL - STL
1 stop5h 41mAmerican Airlines
mar. 12/316:30 amSTL - YUL
1 stop4h 50mAmerican Airlines
Deal found 11/4$524
This United Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/251:25 pmYUL - STL
2 stops9h 20mUnited Airlines
lun. 12/305:00 amSTL - YUL
1 stop4h 32mUnited Airlines
Deal found 11/4$563
This Kissandfly.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/58:10 amYYZ - STL
2 stops13h 45mSouthern / Mokulele
dom. 12/812:15 pmSTL - YYZ
2 stops8h 10mSouthern / Mokulele
Deal found 11/3$574
This Air Canada deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/276:00 amYUL - STL
1 stop7h 26mAir Canada
mar. 12/315:00 amSTL - YUL
1 stop4h 32mAir Canada
Deal found 11/4$590

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 2,455,398 searches. Data last updated noviembre 4, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mié. 12/11

7:30 am-11:24 pm

1 stop16h 54m

$155

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mar. 11/26

1:50 pm-3:06 pm

Nonstop2h 16m

$259

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mar. 11/26

7:45 am-3:39 pm

2 stops8h 54m

$264

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

vie. 11/22

7:50 am-12:04 pm

1 stop5h 14m

$301

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

lun. 11/18

6:20 pm-10:10 pm

1 stop4h 50m

$310

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

vie. 11/22

10:45 pm-10:40 am

2 stops12h 55m

$368

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

lun. 12/2

3:55 pm-4:26 pm

1 stop25h 31m

Lambert-St Louis

lun. 12/9

8:34 pm-4:35 pm

1 stop19h 01m

$344

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 12/5

1:50 pm-3:06 pm

Nonstop2h 16m

Lambert-St Louis

dom. 12/8

3:50 pm-6:45 pm

Nonstop1h 55m

$460

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 12/5

1:50 pm-3:06 pm

Nonstop2h 16m

Lambert-St Louis

lun. 12/9

3:50 pm-6:45 pm

Nonstop1h 55m

$462

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 12/5

6:00 am-9:36 am

1 stop4h 36m

Lambert-St Louis

dom. 12/8

6:30 am-11:27 am

1 stop3h 57m

$473

Flights are sorted by cheapest first

Deals found on 11/3

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, September is the cheapest month in which you can book a flight from Region of Ontario to St. Louis (average of $308). Flying from Region of Ontario to St. Louis in March is currently the most expensive (average of $356). 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 noviembre 4, 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 noviembre 4, 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 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 noviembre 4, 2024.
Peruse reviews from past customers who have flown with Delta, American Airlines and United Airlines from Ontario to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,423 reviews
Alaska Airlines
8.0
Very good
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

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
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

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
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

Reviews

1 / 10

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

WestJet
7.3
Good
2,803 reviews
Alaska Airlines
8.0
Very good
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

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
9,423 reviews

Overall

8.0

Boarding

8.2

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.2

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?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Ontario.

  • Can I find flights from Region of Ontario to St. Louis for under $400 on Cheapflights?

    Yes, there are multiple flights from Region of Ontario to St. Louis for under $400. The cheapest flight booked recently is on Multiple Airlines for just $344, but on average you can expect to pay $568.

  • Are there nonstop flights from Region of Ontario to St. Louis for under $500 on Cheapflights?

    Cheapflights has at least 3 direct flights from Region of Ontario to St. Louis under $500. A good price for a nonstop flight from Region of Ontario to St. Louis is less than $486.

  • Are there last-minute flights available from Region of Ontario to St. Louis for under $400?

    There are currently 11+ open flights from Region of Ontario to St. Louis within the next 7 days for less than $400.

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

    $259 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $264 and $301, 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?

    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 Region of Ontario to St. Louis on time: Air Canada (79%), Jazz (79%), United Airlines (77%).

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

    The cheapest flight price from Region of Ontario to St. Louis is $254. On average you can expect to pay $408. The most popular route, (Toronto Pearson Intl - Lambert-St Louis), can usually be booked for $326.

  • What does YYZ to STL mean?

    YYZ and STL are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. YYZ to STL refers to a flight route from Toronto Pearson Intl Airport to Lambert-St Louis Airport. Ottawa Airport (YOW), Toronto Island Airport (YTZ), London Airport (YXU), Hamilton Airport (YHM), Toronto Region of Waterloo Intl Airport (YKF) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from Ontario to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Ontario to St. Louis that allow pets onboard?

    Many airlines flying from Ontario to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to St. Louis?

    Yes, you can often find last-minute deals on Ontario to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Region of Ontario to St. Louis flight deals updated?

    The Region of Ontario to St. Louis flight deals you see on this page were last updated on 11/4.

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

    Currently, September is the cheapest month in which you can book a flight from Region of Ontario to St. Louis (average of $308). Flying from Region of Ontario to St. Louis in March is currently the most expensive (average of $356). 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

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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.
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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 2,455,398 searches. Data last updated noviembre 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$321Average$544FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$575Average$730FlexibilityNo cancel feeOn-time69%
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