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Cheap flights from Missouri to Ontario from C$ 99

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
25 Feb — 4 Mar1
1 adult

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 20 February 2025.

Round-trip from

C$ 305

One-way from

C$ 99

Good round-trip deal

C$ 242 or less
1/4-3/4
  • 1/4-3/4
  • 2 total stops
  • 39h 55m total
  • Missouri to Ontario
Search Deals
27/3
  • 27/3
  • 1 total stop
  • 28h 08m total
  • Missouri to Ontario
Search Deals
Price to beat on a round-trip flight from Missouri to Ontario.
Search Deals

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 20 February 2025.

Tue 1/46:47 p.m.STL - YYZ
1 stop28h 08mMultiple Airlines
Thu 3/47:05 a.m.YYZ - STL
1 stop11h 47mMultiple Airlines
Deal found 19/2C$ 305
Wed 2/45:12 p.m.MCI - YYZ
1 stop25h 18mMultiple Airlines
Tue 8/48:15 p.m.YYZ - MCI
1 stop19h 46mMultiple Airlines
Deal found 18/2C$ 337
Thu 10/46:11 p.m.STL - YUL
1 stop19h 44mMultiple Airlines
Sun 13/46:45 a.m.YUL - STL
2 stops11h 31mMultiple Airlines
Deal found 20/2C$ 402
Tue 11/32:19 p.m.MCI - YUL
1 stop8h 07mDelta
Sun 16/37:00 a.m.YUL - MCI
1 stop6h 20mDelta
Deal found 19/2C$ 578
Tue 11/35:30 a.m.MCI - YUL
2 stops10h 29mAmerican Airlines
Sun 16/37:14 a.m.YUL - MCI
1 stop11h 31mAmerican Airlines
Deal found 19/2C$ 592
Tue 8/46:15 a.m.MCI - YUL
1 stop4h 42mMultiple Airlines
Fri 11/46:30 a.m.YUL - MCI
1 stop10h 34mMultiple Airlines
Deal found 20/2C$ 601
Mon 31/39:30 a.m.STL - YYZ
1 stop10h 01mDelta
Mon 7/46:14 a.m.YYZ - STL
1 stop9h 32mDelta
Deal found 20/2C$ 616
Mon 31/36:10 a.m.STL - YUL
1 stop9h 18mDelta
Mon 7/46:00 a.m.YUL - STL
1 stop9h 46mDelta
Deal found 20/2C$ 635
Mon 24/35:55 a.m.STL - YYZ
1 stop10h 35mAmerican Airlines
Fri 28/311:30 a.m.YYZ - STL
1 stop7h 29mAmerican Airlines
Deal found 20/2C$ 651
Wed 2/47:00 a.m.MCI - YYZ
1 stop30h 40mAlaska Airlines
Tue 8/44:30 p.m.YYZ - MCI
1 stop32h 29mAlaska Airlines
Deal found 19/2C$ 653
Thu 20/35:33 p.m.STL - YYZ
1 stop5h 26mAir Canada
Thu 27/39:00 a.m.YYZ - STL
1 stop4h 12mAir Canada
Deal found 20/2C$ 663
Sun 6/44:57 p.m.STL - YXU
1 stop17h 23mMultiple Airlines
Sun 13/48:00 p.m.YXU - STL
2 stops22h 56mMultiple Airlines
Deal found 20/2C$ 687

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 629,999 searches. Data last updated 20 February 2025.

Fly from

Missouri

Fly to

Ontario

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/4

6:47 p.m.-11:55 p.m.

1 stop28h 08m

Toronto Pearson Intl

Thu 3/4

7:05 a.m.-5:52 p.m.

1 stop11h 47m

C$ 305

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Wed 2/4

5:12 p.m.-7:30 p.m.

1 stop25h 18m

Toronto Pearson Intl

Tue 8/4

8:15 p.m.-3:01 p.m.

1 stop19h 46m

C$ 337

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Thu 10/4

6:11 p.m.-2:55 p.m.

1 stop19h 44m

Montreal Pierre Elliott Trudeau Intl

Sun 13/4

6:45 a.m.-5:16 p.m.

2 stops11h 31m

C$ 402

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 11/3

2:19 p.m.-11:26 p.m.

1 stop8h 07m

Montreal Pierre Elliott Trudeau Intl

Sun 16/3

7:00 a.m.-12:20 p.m.

1 stop6h 20m

C$ 578

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 11/3

5:30 a.m.-4:59 p.m.

2 stops10h 29m

Montreal Pierre Elliott Trudeau Intl

Sun 16/3

7:14 a.m.-5:45 p.m.

1 stop11h 31m

C$ 592

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 8/4

6:15 a.m.-11:57 a.m.

1 stop4h 42m

Montreal Pierre Elliott Trudeau Intl

Fri 11/4

6:30 a.m.-4:04 p.m.

1 stop10h 34m

C$ 601

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 31/3

9:30 a.m.-8:31 p.m.

1 stop10h 01m

Toronto Pearson Intl

Mon 7/4

6:14 a.m.-2:46 p.m.

1 stop9h 32m

C$ 616

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 31/3

6:10 a.m.-4:28 p.m.

1 stop9h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 7/4

6:00 a.m.-2:46 p.m.

1 stop9h 46m

C$ 635

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 24/3

5:55 a.m.-5:30 p.m.

1 stop10h 35m

Toronto Pearson Intl

Fri 28/3

11:30 a.m.-5:59 p.m.

1 stop7h 29m

C$ 651

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Wed 2/4

7:00 a.m.-2:40 p.m.

1 stop30h 40m

Toronto Pearson Intl

Tue 8/4

4:30 p.m.-11:59 p.m.

1 stop32h 29m

C$ 653

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 51 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 C$ 167). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 20 February 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Region of Ontario as you normally would.

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 20 February 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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 20 February 2025.
See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Missouri to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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
8,766 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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
2,801 reviews
Alaska Airlines
8.0
Very good
9,692 reviews
Check prices

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

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 airlines for a one-way flight from Missouri to Region of Ontario are Delta (C$ 273), Air Canada (C$ 281), and United Airlines (C$ 291).

  • 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 C$ 167). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 airline flying from Missouri to Ontario

Discover the top airline 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 629,999 searches. Data last updated 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 219AverageC$ 827FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Missouri to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Missouri to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Missouri to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Missouri.

Can Cheapflights find flights from Missouri to Ontario with no change fees?

Certainly. Search results for flights to Ontario from Missouri shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Missouri to Ontario become cheaper?

Yes! Start tracking prices for Missouri to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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