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$89+ 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 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
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 February 22, 2025.

Round-trip from

$223
(Mytrip)

One-way from

$89
(Mytrip)

Good round-trip deal

$820 or less

Good one-way deal

$402 or less
From Missouri to Ontario
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One-way flight from Missouri to Ontario
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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 February 22, 2025.

This Mytrip deal was found by Cheapflights users on 2/21. 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 4/36:47 pmSTL - YUL
1 stop19h 08mMultiple Airlines
Mon 4/73:55 pmYUL - STL
1 stop26h 57mMultiple Airlines
Deal found 2/21$223
This Mytrip deal was found by Cheapflights users on 2/21. 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.
Tue 4/156:11 pmSTL - YYZ
1 stop28h 44mMultiple Airlines
Sun 4/207:05 amYYZ - STL
1 stop11h 11mMultiple Airlines
Deal found 2/21$231
This Mytrip deal was found by Cheapflights users on 2/21. 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 4/44:21 pmMCI - YYZ
1 stop29h 14mMultiple Airlines
Mon 4/77:05 amYYZ - MCI
1 stop9h 21mMultiple Airlines
Deal found 2/21$241
This Mytrip deal was found by Cheapflights users on 2/21. 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 3/1310:20 amMCI - YTZ
2 stops30h 40mMultiple Airlines
Mon 3/171:05 pmYTZ - MCI
3 stops22h 30mMultiple Airlines
Deal found 2/21$388
This Delta deal was found by Cheapflights users on 2/21. 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.
Tue 3/256:00 amMCI - YUL
1 stop9h 28mDelta
Sat 3/296:05 amYUL - MCI
1 stop10h 33mDelta
Deal found 2/21$407
This United Airlines deal was found by Cheapflights users on 2/21. 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 3/257:40 amMCI - YUL
2 stops9h 15mUnited Airlines
Sat 3/298:05 amYUL - MCI
1 stop9h 04mUnited Airlines
Deal found 2/21$417
This American Airlines deal was found by Cheapflights users on 2/21. 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 3/56:21 amMCI - YUL
2 stops9h 34mAmerican Airlines
Wed 3/197:14 amYUL - MCI
1 stop11h 31mAmerican Airlines
Deal found 2/21$421
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Mon 4/76:38 pmSTL - YOW
2 stops12h 42mMultiple Airlines
Mon 4/149:25 amYOW - STL
1 stop15h 21mMultiple Airlines
Deal found 2/21$438
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 9/412:00 pmSTL - YYZ
1 stop7h 37mDelta
Sat 9/612:15 pmYYZ - STL
1 stop5h 32mDelta
Deal found 2/20$458
This Air Canada deal was found by Cheapflights users on 2/20. 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.
Fri 3/213:35 pmSTL - YYZ
1 stop4h 50mAir Canada
Fri 3/281:50 pmYYZ - STL
Nonstop2h 16mAir Canada
Deal found 2/20$461
This Mytrip deal was found by Cheapflights users on 2/21. 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 3/249:53 pmSGF - YYZ
1 stop31h 02mMultiple Airlines
Sun 3/308:00 pmYYZ - SGF
1 stop26h 03mMultiple Airlines
Deal found 2/21$468
This American Airlines deal was found by Cheapflights users on 2/21. 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 4/76:00 pmSTL - YUL
1 stop16h 44mAmerican Airlines
Mon 4/1412:30 pmYUL - STL
1 stop12h 03mAmerican Airlines
Deal found 2/21$476

Find flights from Missouri to Ontario within your budget

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 February 22, 2025.

Fly from

Missouri

Fly to

Ontario

Route

Depart

Return

Price

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 4/3

6:47 pm-2:55 pm

1 stop19h 08m

Montreal Pierre Elliott Trudeau Intl

Mon 4/7

3:55 pm-5:52 pm

1 stop26h 57m

$223

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/15

6:11 pm-11:55 pm

1 stop28h 44m

Toronto Pearson Intl

Sun 4/20

7:05 am-5:16 pm

1 stop11h 11m

$231

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Fri 4/4

4:21 pm-10:35 pm

1 stop29h 14m

Toronto Pearson Intl

Mon 4/7

7:05 am-3:26 pm

1 stop9h 21m

$241

Kansas CityToronto

MCI - YTZ

MCIYTZ

Kansas City

Thu 3/13

10:20 am-6:00 pm

2 stops30h 40m

Toronto Island

Mon 3/17

1:05 pm-10:35 am

3 stops22h 30m

$388

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 3/25

6:00 am-4:28 pm

1 stop9h 28m

Montreal Pierre Elliott Trudeau Intl

Sat 3/29

6:05 am-3:38 pm

1 stop10h 33m

$407

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 3/25

7:40 am-5:55 pm

2 stops9h 15m

Montreal Pierre Elliott Trudeau Intl

Sat 3/29

8:05 am-4:09 pm

1 stop9h 04m

$417

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 3/5

6:21 am-4:55 pm

2 stops9h 34m

Montreal Pierre Elliott Trudeau Intl

Wed 3/19

7:14 am-5:45 pm

1 stop11h 31m

$421

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 4/7

6:38 pm-8:20 am

2 stops12h 42m

Ottawa

Mon 4/14

9:25 am-11:46 pm

1 stop15h 21m

$438

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 3/21

3:35 pm-9:25 pm

1 stop4h 50m

Toronto Pearson Intl

Fri 3/28

1:50 pm-3:06 pm

Nonstop2h 16m

$461

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 3/21

6:10 am-4:11 pm

1 stop9h 01m

Toronto Pearson Intl

Fri 3/28

6:30 am-10:34 am

1 stop5h 04m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 53 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.

Travel insights for flights from Missouri to Ontario

Get recent, data-driven insights about flights from Missouri to Ontario including ideal travel times, pricing trends, and more.

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 February 22, 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 February 22, 2025.

The most flights from USMO to CAON are scheduled on a Wednesday (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 February 22, 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
9,700 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
9,700 reviews
Alaska Airlines
8.0
Very good
9,700 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
8,212 reviews
Alaska Airlines
8.0
Very good
9,700 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
8,759 reviews
Alaska Airlines
8.0
Very good
9,700 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
9,700 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
2,800 reviews
Alaska Airlines
8.0
Very good
9,700 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 American Airlines, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from Delta and Air Canada, 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$215Average$594FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$247Average$673FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$595FlexibilityNo cancel feeOn-time71%
DeltaCheapest$464Average$713FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$497Average$702FlexibilityNo cancel feeOn-time60%
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