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Missouri

$151+ Cheap flights from Ontario to Missouri

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
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Cheap flight deals from Ontario to Missouri

Keep the following information in mind while searching for Ontario to Missouri flight deals. Data was last updated March 31, 2025.

Round-trip from

$323
(United Airlines)

One-way from

$151
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$526

Good round-trip deal

$417 or less

Good one-way deal

$261 or less
From Ontario to Missouri
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One-way flight from Ontario to Missouri
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Highest demand for flights based on searches. 10% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Ontario to Missouri.
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Price to beat on a one-way flight from Ontario to Missouri.
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Find flight deals from Ontario to Missouri

Cheapest flights from Ontario to Missouri
Explore the most affordable flight options available from Ontario to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This United Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 4/2911:15 amYUL - MCI
1 stop10h 17mUnited Airlines
Tue 5/67:45 amMCI - YUL
2 stops9h 40mUnited Airlines
Deal found 3/30$323
This Delta deal was found by Cheapflights users on 3/30. 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.
Fri 4/116:00 pmYUL - MCI
1 stop7h 01mDelta
Sun 4/136:15 amMCI - YUL
1 stop4h 42mDelta
Deal found 3/30$332
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:45 amYUL - MCI
2 stops28h 46mMultiple Airlines
Mon 5/122:45 pmMCI - YUL
1 stop22h 35mMultiple Airlines
Deal found 3/31$355
This lastminute.com deal was found by Cheapflights users on 3/31. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:45 pmYUL - MCI
1 stop17h 22mWestJet
Mon 5/125:26 pmMCI - YUL
1 stop23h 14mWestJet
Deal found 3/31$356
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Thu 4/105:50 pmYYZ - MCI
2 stops22h 36mMultiple Airlines
Fri 5/911:43 amMCI - YYZ
1 stop8h 25mMultiple Airlines
Deal found 3/30$369
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Thu 5/16:30 pmYYZ - STL
Nonstop2h 13mAir Canada
Wed 5/72:30 pmSTL - YYZ
Nonstop2h 00mAir Canada
Deal found 3/30$379
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Thu 4/107:25 pmYYZ - STL
1 stop23h 18mMultiple Airlines
Sun 4/134:57 pmSTL - YYZ
1 stop19h 58mMultiple Airlines
Deal found 3/31$385
This CheapTicketsDeal deal was found by Cheapflights users on 3/30. 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 CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/3010:20 amYYZ - STL
1 stop5h 26mWestJet
Wed 5/712:30 pmSTL - YYZ
1 stop7h 14mWestJet
Deal found 3/30$390
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 5/196:20 pmYYZ - STL
1 stop6h 31mAmerican Airlines
Sat 5/246:20 amSTL - YYZ
1 stop8h 20mAmerican Airlines
Deal found 3/31$408
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Thu 5/1511:30 amYYZ - STL
Nonstop2h 06mUnited Airlines
Thu 5/225:00 amSTL - YYZ
1 stop8h 38mUnited Airlines
Deal found 3/30$425
This Delta deal was found by Cheapflights users on 3/29. 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.
Fri 4/259:45 amYYZ - STL
1 stop4h 16mDelta
Sun 5/186:00 amSTL - YYZ
1 stop4h 40mDelta
Deal found 3/29$430
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:45 amYUL - STL
1 stop11h 30mMultiple Airlines
Thu 5/89:50 amSTL - YUL
3 stops13h 47mMultiple Airlines
Deal found 3/31$436

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Missouri 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 2,558,603 searches. Data last updated March 31, 2025.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Ontario

Fly to

Missouri

Route

Depart

Return

Price

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Tue 4/29

11:15 am-8:32 pm

1 stop10h 17m

Kansas City

Tue 5/6

7:45 am-6:25 pm

2 stops9h 40m

$323

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 4/11

6:00 pm-12:01 am

1 stop7h 01m

Kansas City

Sun 4/13

6:15 am-11:57 am

1 stop4h 42m

$332

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 5/9

6:45 am-10:31 am

2 stops28h 46m

Kansas City

Mon 5/12

2:45 pm-2:20 pm

1 stop22h 35m

$355

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 5/9

6:45 pm-11:07 am

1 stop17h 22m

Kansas City

Mon 5/12

5:26 pm-5:40 pm

1 stop23h 14m

$356

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Thu 4/10

5:50 pm-3:26 pm

2 stops22h 36m

Kansas City

Fri 5/9

11:43 am-9:08 pm

1 stop8h 25m

$369

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/1

6:30 pm-7:43 pm

Nonstop2h 13m

Lambert-St Louis

Wed 5/7

2:30 pm-5:30 pm

Nonstop2h 00m

$379

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/10

7:25 pm-5:43 pm

1 stop23h 18m

Lambert-St Louis

Sun 4/13

4:57 pm-1:55 pm

1 stop19h 58m

$385

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 4/30

10:20 am-2:46 pm

1 stop5h 26m

Lambert-St Louis

Wed 5/7

12:30 pm-8:44 pm

1 stop7h 14m

$390

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 5/19

6:20 pm-11:51 pm

1 stop6h 31m

Lambert-St Louis

Sat 5/24

6:20 am-3:40 pm

1 stop8h 20m

$408

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/15

11:30 am-12:36 pm

Nonstop2h 06m

Lambert-St Louis

Thu 5/22

5:00 am-2:38 pm

1 stop8h 38m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 47 results
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Best time to book a flight from Ontario to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Missouri

What is the cheapest month to book a flight from Region of Ontario to Missouri?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of $311). Flying from Region of Ontario to Missouri 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 MO?

Find hourly flight availability from Ontario to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

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 Missouri as you normally would.

Rainfall in Missouri by month

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

In terms of precipitation, rainfall in Missouri ranges from 1.1 - 5.2 inches per month. May is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Missouri when rainfall is around 1.1 in.

Temperature in Missouri by month

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

If weather is an important factor for your trip to Missouri, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated March 31, 2025.
To help decide which airline to fly from Ontario to Missouri, see what other customers have to say about Alaska Airlines, Delta and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,789 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $191. Delta flights start at $199 while deals on Air Canada start at $220 one-way.

  • Can I find deals for flights from Ontario to Missouri that include hotel bookings?

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

  • How can I find direct flights from Ontario to Missouri?

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

  • Can I find deals for business class flights from Ontario to Missouri?

    Yes. Cheapflights offers flight deals from Ontario to Missouri 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 Missouri?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of $311). Flying from Region of Ontario to Missouri 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 Missouri

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Newark flights
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Top 5 airlines flying from Ontario to Missouri

Discover the top 5 airlines that operate flights from Ontario to Missouri. 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 2,558,603 searches. Data last updated March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$361Average$528FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$371Average$573FlexibilityNo cancel feeOn-time69%
DeltaCheapest$389Average$485FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$421Average$487FlexibilityNo cancel feeOn-time71%
WestJetCheapest$448Average$606FlexibilityNo cancel feeOn-time60%
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