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Missouri

$135+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — MCI
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap 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 December 16, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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 12/305:30 pmYYZ - STL
1 stop6h 13mUnited Airlines
Sat 1/36:35 pmSTL - YYZ
1 stop4h 24mUnited Airlines
Deal found 12/14$497
This Air Canada deal was found by Cheapflights users on 12/14. 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.
Tue 12/306:45 pmYYZ - STL
1 stop4h 58mAir Canada
Sat 1/36:35 pmSTL - YYZ
1 stop4h 24mAir Canada
Deal found 12/14$543
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Sun 12/2812:05 pmYYZ - STL
1 stop6h 49mUnited Airlines
Sat 1/36:35 pmSTL - YYZ
1 stop4h 24mUnited Airlines
Deal found 12/15$569
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Tue 12/237:10 amYYZ - MCI
1 stop16h 49mMultiple Airlines
Wed 12/246:15 pmMCI - YYZ
1 stop28h 05mMultiple Airlines
Deal found 12/13$594
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/244:10 pmYYZ - STL
1 stop7h 12mUnited Airlines
Mon 12/296:35 pmSTL - YYZ
1 stop4h 24mUnited Airlines
Deal found 12/14$596
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/314:45 pmYUL - MCI
1 stop6h 05mUnited Airlines
Sat 1/316:30 pmMCI - YUL
2 stops17h 58mUnited Airlines
Deal found 12/14$622
This Mytrip deal was found by Cheapflights users on 12/13. 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.
Sun 12/147:15 amYYZ - MCI
1 stop17h 00mMultiple Airlines
Mon 12/157:01 pmMCI - YYZ
1 stop15h 42mMultiple Airlines
Deal found 12/13$631
This Kiwi.com deal was found by Cheapflights users on 12/14. 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.
Sat 12/207:10 amYYZ - MCI
1 stop16h 49mMultiple Airlines
Tue 12/236:15 pmMCI - YYZ
1 stop19h 25mMultiple Airlines
Deal found 12/14$638
This Air Canada deal was found by Cheapflights users on 12/15. 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.
Sun 12/282:00 pmYYZ - STL
Nonstop2h 29mAir Canada
Sat 1/36:35 pmSTL - YYZ
1 stop4h 24mAir Canada
Deal found 12/15$663
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sat 12/276:00 amYUL - MCI
1 stop16h 50mUnited Airlines
Sun 1/118:00 amMCI - YUL
1 stop5h 00mUnited Airlines
Deal found 12/14$667
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/247:10 amYYZ - MCI
1 stop16h 49mMultiple Airlines
Sat 12/276:15 pmMCI - YYZ
1 stop28h 05mMultiple Airlines
Deal found 12/15$674
This American Airlines deal was found by Cheapflights users on 12/15. 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.
Fri 12/2612:59 pmYUL - STL
1 stop8h 52mAmerican Airlines
Fri 1/25:00 amSTL - YUL
1 stop7h 46mAmerican Airlines
Deal found 12/15$676

Find flight deals from Ontario to Missouri

Keep the following information in mind while searching for Ontario to Missouri flight deals. Data was last updated December 16, 2025.

Round-trip from

$215
(Kiwi.com)

One-way from

$135
(Kiwi.com)

Popular in

September

Cheapest in

June

Average price

$518

Good round-trip deal

$542 or less
From Ontario to Missouri
Search Deals
One-way flight from Ontario to Missouri
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Missouri.
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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 December 16, 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

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Thu 1/22

7:40 am-10:31 am

1 stop27h 51m

Kansas City

Thu 1/29

11:26 am-11:20 pm

1 stop10h 54m

$263

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 1/22

4:20 pm-11:33 pm

1 stop8h 13m

Lambert-St Louis

Sun 1/25

5:42 pm-5:13 pm

1 stop22h 31m

$274

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Wed 1/28

7:15 am-4:09 pm

1 stop9h 54m

Kansas City

Wed 2/4

5:04 pm-2:20 pm

1 stop20h 16m

$276

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 1/11

7:10 am-8:05 am

1 stop25h 55m

Lambert-St Louis

Sat 1/17

3:43 pm-6:20 am

2 stops37h 37m

$276

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Wed 1/14

3:40 pm-10:31 am

1 stop19h 51m

Kansas City

Wed 1/21

7:00 am-9:11 pm

2 stops37h 11m

$277

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Mon 1/12

5:15 pm-4:09 pm

1 stop23h 54m

Kansas City

Mon 1/19

11:26 am-7:02 pm

1 stop30h 36m

$291

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sun 1/25

4:35 pm-9:21 am

1 stop17h 46m

Lambert-St Louis

Tue 2/3

5:42 pm-5:00 pm

2 stops22h 18m

$295

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 1/6

7:15 am-10:33 pm

1 stop16h 18m

Lambert-St Louis

Fri 1/9

5:11 pm-2:20 pm

1 stop20h 09m

$301

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 1/8

5:11 pm-10:58 pm

1 stop6h 47m

Lambert-St Louis

Mon 1/12

3:11 pm-9:18 pm

1 stop5h 07m

$304

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Thu 1/29

9:45 am-3:10 pm

1 stop6h 25m

Kansas City

Thu 2/5

11:29 am-9:18 pm

1 stop8h 49m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 56 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, December is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of $254). Flying from Region of Ontario to Missouri in March is currently the most expensive (average of $360). 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 December 16, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 25% on flights from Region of Ontario to Missouri by exploring options for tickets in the evening.

How much does it cost to fly round-trip from Region of Ontario to Missouri?

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 December 16, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Ontario to Missouri to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,094 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,047 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,202 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,527 reviews
Delta
7.9
Good
8,010 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

  • How long is the flight from Region of Ontario to Missouri?

    United Airlines and American Airlines can get you from Region of Ontario to Missouri in just under 6h 47m. Your travel time can differ by up to 11h 52m. The distance from Region of Ontario to Missouri is about 878 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $152. Air Canada flights start at $187 while deals on United Airlines start at $188 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, December is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of $254). Flying from Region of Ontario to Missouri in March is currently the most expensive (average of $360). 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.
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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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$324Average$566FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$421Average$471FlexibilityNo cancel feeOn-time71%
DeltaCheapest$472Average$581FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$473Average$822FlexibilityNo cancel feeOn-time69%
WestJetCheapest$606Average$755FlexibilityNo cancel feeOn-time60%

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