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Ontario

$115+ Cheap flights from Missouri to Ontario

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Missouri to Ontario

Keep the following information in mind while searching for Missouri to Ontario flight deals. Data was last updated April 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$308
(Mytrip)

One-way from

$115
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$691

Good round-trip deal

$798 or less

Good one-way deal

$241 or less
Provider with most accurate pricing for Kansas City-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Kansas City-Toronto (YTO) flights.
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From Missouri to Ontario
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One-way flight from Missouri to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Missouri to Ontario.
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Price to beat on a one-way flight from Missouri to Ontario.
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Find flight deals from Missouri to Ontario

Cheapest flights from Missouri to Ontario
Explore the most affordable flight options available from Missouri to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Mytrip deal was found by Cheapflights users on 4/16. 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.
Mon 6/167:50 pmMCI - YYZ
3 stops27h 43mMultiple Airlines
Tue 6/246:30 amYYZ - MCI
1 stop28h 40mMultiple Airlines
Deal found 4/16$308
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 6/510:10 amSTL - YYZ
1 stop9h 50mMultiple Airlines
Mon 6/94:00 pmYYZ - STL
1 stop8h 37mMultiple Airlines
Deal found 4/17$317
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Sun 5/2510:10 amSTL - YOW
1 stop30h 05mMultiple Airlines
Fri 5/303:50 pmYOW - STL
1 stop18h 25mMultiple Airlines
Deal found 4/16$340
This Mytrip deal was found by Cheapflights users on 4/17. 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 5/155:46 amMCI - YUL
1 stop7h 34mMultiple Airlines
Sun 5/187:00 amYUL - MCI
3 stops28h 31mMultiple Airlines
Deal found 4/17$347
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/156:00 amMCI - YUL
1 stop16h 26mUnited Airlines
Sun 5/186:15 amYUL - MCI
1 stop5h 21mUnited Airlines
Deal found 4/17$374
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 8/135:57 amMCI - YUL
2 stops9h 34mAmerican Airlines
Sat 8/235:15 pmYUL - MCI
2 stops7h 44mAmerican Airlines
Deal found 4/17$388
This Mytrip deal was found by Cheapflights users on 4/17. 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 5/159:07 pmMCI - YOW
2 stops26h 14mMultiple Airlines
Thu 5/223:50 pmYOW - MCI
1 stop19h 41mMultiple Airlines
Deal found 4/17$401
This Mytrip deal was found by Cheapflights users on 4/17. 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 5/97:58 pmMCI - YTZ
2 stops16h 42mMultiple Airlines
Mon 5/1212:00 pmYTZ - MCI
2 stops26h 50mMultiple Airlines
Deal found 4/17$406
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 5/1510:10 amSTL - YUL
2 stops13h 27mMultiple Airlines
Thu 5/226:45 amYUL - STL
1 stop18h 07mMultiple Airlines
Deal found 4/17$413
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Thu 5/86:00 amSTL - YYZ
1 stop7h 30mAmerican Airlines
Mon 5/191:15 pmYYZ - STL
1 stop11h 36mAmerican Airlines
Deal found 4/17$435
This United Airlines deal was found by Cheapflights users on 4/16. 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 5/157:59 amJLN - YYZ
1 stop4h 43mUnited Airlines
Thu 5/222:45 pmYYZ - JLN
1 stop9h 55mUnited Airlines
Deal found 4/16$439
This Delta deal was found by Cheapflights users on 4/17. 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.
Mon 5/55:34 pmSTL - YYZ
1 stop4h 41mDelta
Tue 5/207:55 amYYZ - STL
1 stop13h 53mDelta
Deal found 4/17$450

Cheapflights Fare Finder

Customize your flight search to find flights from Missouri to Ontario 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 April 17, 2025.
Use the filters below to find and compare flights from Missouri to Ontario that are best for you.

Fly from

Missouri

Fly to

Ontario

Route

Depart

Return

Price

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Mon 6/16

7:50 pm-12:33 am

3 stops27h 43m

Toronto Pearson Intl

Tue 6/24

6:30 am-10:10 am

1 stop28h 40m

$308

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/5

10:10 am-9:00 pm

1 stop9h 50m

Toronto Pearson Intl

Mon 6/9

4:00 pm-11:37 pm

1 stop8h 37m

$317

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 5/25

10:10 am-5:15 pm

1 stop30h 05m

Ottawa

Fri 5/30

3:50 pm-9:15 am

1 stop18h 25m

$340

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Thu 5/15

5:46 am-2:20 pm

1 stop7h 34m

Montreal Pierre Elliott Trudeau Intl

Sun 5/18

7:00 am-10:31 am

3 stops28h 31m

$347

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Thu 5/15

6:00 am-11:26 pm

1 stop16h 26m

Montreal Pierre Elliott Trudeau Intl

Sun 5/18

6:15 am-10:36 am

1 stop5h 21m

$374

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Thu 5/15

9:07 pm-12:21 am

2 stops26h 14m

Ottawa

Thu 5/22

3:50 pm-10:31 am

1 stop19h 41m

$401

Kansas CityToronto

MCI - YTZ

MCIYTZ

Kansas City

Fri 5/9

7:58 pm-1:40 pm

2 stops16h 42m

Toronto Island

Mon 5/12

12:00 pm-1:50 pm

2 stops26h 50m

$406

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 5/15

10:10 am-12:37 am

2 stops13h 27m

Montreal Pierre Elliott Trudeau Intl

Thu 5/22

6:45 am-11:52 pm

1 stop18h 07m

$413

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 7/2

5:06 am-4:45 pm

2 stops10h 39m

Montreal Pierre Elliott Trudeau Intl

Mon 7/7

5:29 pm-11:59 pm

1 stop7h 30m

$421

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/8

6:00 am-2:30 pm

1 stop7h 30m

Toronto Pearson Intl

Mon 5/19

1:15 pm-11:51 pm

1 stop11h 36m

$435

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 52 results
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Best time to book a flight from Missouri to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of $243). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of $359). 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 MO to ON?

Find hourly flight availability from Missouri to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

When flying from Missouri to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Region of Ontario, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated April 17, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Missouri to Ontario 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
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
WestJet
7.2
Good
2,809 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Missouri to Ontario. 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 Missouri to Region of Ontario one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $156. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from Missouri to Region of Ontario for a low price.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of $243). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of $359). 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 Missouri to Ontario

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

Discover the top 5 airlines that operate flights from Missouri to Ontario. 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$218Average$613FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$237Average$663FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$626FlexibilityNo cancel feeOn-time71%
DeltaCheapest$462Average$714FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$497Average$706FlexibilityNo cancel feeOn-time60%

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