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$123+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$274
(Kiwi.com)

One-way from

$123
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$599

Good round-trip deal

$835 or less

Good one-way deal

$260 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. 12% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 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 1, 2025.

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.
Fri 5/1611:43 amMCI - YYZ
1 stop8h 25mMultiple Airlines
Tue 5/207:15 amYYZ - MCI
1 stop16h 26mMultiple Airlines
Deal found 3/30$274
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 5/1510:10 amSTL - YYZ
1 stop9h 50mMultiple Airlines
Thu 5/224:00 pmYYZ - STL
1 stop8h 52mMultiple Airlines
Deal found 3/31$292
This Mytrip deal was found by Cheapflights users on 4/1. 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.
Wed 5/142:45 pmMCI - YUL
3 stops32h 52mMultiple Airlines
Sun 5/186:45 amYUL - MCI
2 stops28h 46mMultiple Airlines
Deal found 4/1$341
This Mytrip deal was found by Cheapflights users on 4/1. 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 5/169:50 amSTL - YUL
3 stops13h 47mMultiple Airlines
Fri 5/238:15 amYUL - STL
3 stops26h 00mMultiple Airlines
Deal found 4/1$387
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 5/167:58 pmMCI - YTZ
2 stops12h 32mMultiple Airlines
Mon 5/1912:00 pmYTZ - MCI
2 stops26h 50mMultiple Airlines
Deal found 3/31$388
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.
Sun 4/136:00 amMCI - YUL
1 stop7h 46mAir Canada
Mon 4/144:31 pmYUL - MCI
1 stop6h 29mAir Canada
Deal found 3/30$400
This Mytrip deal was found by Cheapflights users on 4/1. 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 5/169:50 amSTL - YOW
3 stops13h 32mMultiple Airlines
Fri 5/233:50 pmYOW - STL
1 stop18h 25mMultiple Airlines
Deal found 4/1$400
This Ticket deal was found by Cheapflights users on 4/1. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/17:30 amSTL - YYZ
Nonstop1h 55mAir Canada
Sun 5/43:00 pmYYZ - STL
1 stop5h 58mAir Canada
Deal found 4/1$403
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.
Sun 4/139:08 amMCI - YUL
1 stop6h 51mUnited Airlines
Mon 4/1411:15 amYUL - MCI
2 stops11h 45mUnited Airlines
Deal found 3/30$410
This Delta deal was found by Cheapflights users on 4/1. 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 5/266:37 amMCI - YUL
1 stop8h 38mDelta
Thu 5/296:15 amYUL - MCI
1 stop9h 47mDelta
Deal found 4/1$424
This Justfly.com deal was found by Cheapflights users on 4/1. 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.
Tue 5/135:45 amMCI - YUL
1 stop10h 55mWestJet
Fri 5/166:45 pmYUL - MCI
1 stop15h 40mWestJet
Deal found 4/1$425
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.
Fri 4/48:26 amSGF - YYZ
1 stop28h 29mMultiple Airlines
Mon 4/710:00 amYYZ - SGF
1 stop28h 30mMultiple Airlines
Deal found 3/30$432

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 1, 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

Fri 5/16

11:43 am-9:08 pm

1 stop8h 25m

Toronto Pearson Intl

Tue 5/20

7:15 am-10:41 pm

1 stop16h 26m

$274

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/15

10:10 am-9:00 pm

1 stop9h 50m

Toronto Pearson Intl

Thu 5/22

4:00 pm-11:52 pm

1 stop8h 52m

$292

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 5/14

2:45 pm-12:37 am

3 stops32h 52m

Montreal Pierre Elliott Trudeau Intl

Sun 5/18

6:45 am-10:31 am

2 stops28h 46m

$341

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 5/16

9:50 am-12:37 am

3 stops13h 47m

Montreal Pierre Elliott Trudeau Intl

Fri 5/23

8:15 am-9:15 am

3 stops26h 00m

$387

Kansas CityToronto

MCI - YTZ

MCIYTZ

Kansas City

Fri 5/16

7:58 pm-9:30 am

2 stops12h 32m

Toronto Island

Mon 5/19

12:00 pm-1:50 pm

2 stops26h 50m

$388

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sun 4/13

6:00 am-2:46 pm

1 stop7h 46m

Montreal Pierre Elliott Trudeau Intl

Mon 4/14

4:31 pm-10:00 pm

1 stop6h 29m

$400

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Fri 5/16

9:50 am-12:22 am

3 stops13h 32m

Ottawa

Fri 5/23

3:50 pm-9:15 am

1 stop18h 25m

$400

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/1

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Sun 5/4

3:00 pm-7:58 pm

1 stop5h 58m

$403

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sun 4/13

9:08 am-4:59 pm

1 stop6h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 4/14

11:15 am-10:00 pm

2 stops11h 45m

$410

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Mon 5/26

6:37 am-4:15 pm

1 stop8h 38m

Montreal Pierre Elliott Trudeau Intl

Thu 5/29

6:15 am-3:02 pm

1 stop9h 47m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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 1, 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.

Weekly flight availability from Missouri to Region of Ontario

Explore weekly flight availability from Missouri to Ontario. 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 April 1, 2025.

The most flights from USMO to CAON are scheduled on a Tuesday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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 1, 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
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
9,823 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
8,615 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
9,823 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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 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 $172. However, be on the lookout for offers from United Airlines 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$223Average$616FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$237Average$664FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$615FlexibilityNo cancel feeOn-time71%
DeltaCheapest$462Average$721FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$497Average$706FlexibilityNo cancel feeOn-time60%

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