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Cheap flights from Missouri to Ontario from C$ 136

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Missouri to Ontario

Enter your travel dates to find the best prices.

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 27 January 2026.

Mon 2/33:49 p.m.
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Tue 3/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 26/1C$ 311
Sun 1/310:11 p.m.
STL
-
YYZ
1 stop31h 32m
Multiple Airlines
Thu 5/38:20 p.m.
YYZ
-
STL
1 stop11h 42m
Multiple Airlines
Deal found 26/1C$ 340
Sun 1/310:11 p.m.
STL
-
YYZ
2 stops20h 25m
Multiple Airlines
Tue 3/37:10 a.m.
YYZ
-
STL
1 stop16h 17m
Multiple Airlines
Deal found 26/1C$ 342
Sat 28/22:51 p.m.
STL
-
YYZ
2 stops38h 52m
Multiple Airlines
Wed 4/38:20 p.m.
YYZ
-
STL
1 stop28h 39m
Multiple Airlines
Deal found 27/1C$ 366
Thu 2/411:26 a.m.
MCI
-
YYZ
1 stop10h 54m
Multiple Airlines
Mon 6/43:40 p.m.
YYZ
-
MCI
1 stop19h 43m
Multiple Airlines
Deal found 25/1C$ 381
Tue 3/33:49 p.m.
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Tue 17/37:15 a.m.
YYZ
-
STL
2 stops28h 22m
Multiple Airlines
Deal found 26/1C$ 393
Fri 27/23:49 p.m.
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Tue 3/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 27/1C$ 404
Mon 16/211:26 a.m.
MCI
-
YYZ
2 stops35h 48m
Multiple Airlines
Tue 17/37:15 a.m.
YYZ
-
MCI
1 stop17h 38m
Multiple Airlines
Deal found 26/1C$ 419
Tue 31/37:00 a.m.
MCI
-
YYZ
2 stops35h 36m
Multiple Airlines
Mon 6/48:00 p.m.
YYZ
-
MCI
1 stop28h 31m
Multiple Airlines
Deal found 25/1C$ 424
Fri 27/23:49 p.m.
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Wed 4/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 27/1C$ 446
Tue 24/24:24 p.m.
MCI
-
YYZ
1 stop20h 56m
Multiple Airlines
Tue 3/37:10 a.m.
YYZ
-
MCI
1 stop9h 19m
Multiple Airlines
Deal found 25/1C$ 455
Wed 11/311:32 a.m.
STL
-
YYZ
2 stops31h 23m
Multiple Airlines
Wed 18/37:15 a.m.
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Deal found 25/1C$ 460

Find flight deals from Missouri to Ontario

Keep the following information in mind while searching for Missouri to Ontario flight deals. Data was last updated 27 January 2026.

Round-trip from

C$ 311

One-way from

C$ 136

Popular in

January

Cheapest in

February

Average price

C$ 1,245
2/3-3/3
  • 2/3-3/3
  • 2 total stops
  • 23h 37m total
  • Missouri to Ontario
Search Deals
25/2
  • 25/2
  • 1 total stop
  • 18h 37m total
  • Missouri to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 629,999 searches. Data last updated 27 January 2026.
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

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 2/3

3:49 p.m.-12:14 a.m.

1 stop7h 25m

Toronto Pearson Intl

Tue 3/3

7:15 a.m.-10:27 p.m.

1 stop16h 12m

C$ 311

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/3

10:11 p.m.-6:43 a.m.

1 stop31h 32m

Toronto Pearson Intl

Thu 5/3

8:20 p.m.-7:02 a.m.

1 stop11h 42m

C$ 340

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Mon 16/2

11:26 a.m.-12:14 a.m.

2 stops35h 48m

Toronto Pearson Intl

Tue 17/3

7:15 a.m.-11:53 p.m.

1 stop17h 38m

C$ 419

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Tue 24/2

4:24 p.m.-2:20 p.m.

1 stop20h 56m

Toronto Pearson Intl

Tue 3/3

7:10 a.m.-3:29 p.m.

1 stop9h 19m

C$ 455

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Sun 26/4

12:12 p.m.-2:05 p.m.

1 stop24h 53m

Toronto Pearson Intl

Thu 30/4

6:30 a.m.-11:07 a.m.

1 stop29h 37m

C$ 461

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Sun 26/4

12:12 p.m.-2:05 p.m.

1 stop24h 53m

Toronto Pearson Intl

Tue 28/4

7:15 a.m.-11:59 p.m.

1 stop17h 44m

C$ 478

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 26/2

3:49 p.m.-12:14 a.m.

1 stop7h 25m

Toronto Pearson Intl

Tue 3/3

7:15 a.m.-10:27 p.m.

1 stop16h 12m

C$ 489

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Wed 11/2

7:00 a.m.-7:55 p.m.

1 stop11h 55m

Toronto Pearson Intl

Wed 18/2

3:40 p.m.-10:30 a.m.

1 stop19h 50m

C$ 490

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Tue 17/2

4:24 p.m.-2:20 p.m.

1 stop20h 56m

Toronto Pearson Intl

Thu 19/2

7:40 a.m.-10:30 a.m.

1 stop27h 50m

C$ 492

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 23/2

8:22 p.m.-7:05 p.m.

2 stops21h 43m

Toronto Pearson Intl

Thu 26/2

7:10 a.m.-11:59 p.m.

1 stop17h 49m

C$ 493

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 60 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, June is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 244). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 696). 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 27 January 2026.

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 27 January 2026.

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).

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 27 January 2026.
Read reviews from past customers who have flown Air Canada from Missouri to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,660 reviews
Check prices

Overall

7.1

Comfort

7.1

Food

6.3

Entertainment

6.8

Crew

7.8

Boarding

7.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,660 reviews
Air Canada
7.1
Good
10,660 reviews
Check prices

Overall

7.1

Comfort

7.1

Food

6.3

Entertainment

6.8

Crew

7.8

Boarding

7.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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.

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

    American Airlines and United Airlines can get you from Missouri to Region of Ontario in just under 6h 57m. Your travel time can differ by up to 1h 07m. The distance from Missouri to Region of Ontario is about 1698 km. This flight may include one or multiple stops.

  • 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, June is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 244). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 696). 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

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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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 298AverageC$ 638FlexibilityNo 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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