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Cheap flights from Missouri to Ontario from C$ 213

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
29 Aug — 5 Sep1
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 30 July 2026.

Thu 29/1010:35 a.m.
STL
-
YYZ
2 stops29h 40m
Multiple Airlines
Mon 2/116:30 a.m.
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Deal found 29/7C$ 500
Thu 17/97:27 a.m.
STL
-
YYZ
1 stop9h 17m
American Airlines
Mon 28/91:15 p.m.
YYZ
-
STL
1 stop12h 12m
American Airlines
Deal found 29/7C$ 514
Wed 28/1010:35 a.m.
STL
-
YYZ
2 stops12h 35m
Multiple Airlines
Mon 2/116:30 a.m.
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Deal found 26/7C$ 517
Sat 5/95:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Sun 6/93:14 p.m.
YYZ
-
STL
1 stop9h 44m
American Airlines
Deal found 26/7C$ 521
Tue 8/99:32 a.m.
STL
-
YYZ
1 stop7h 58m
American Airlines
Tue 15/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Deal found 25/7C$ 522
Sat 12/97:27 a.m.
STL
-
YYZ
1 stop9h 17m
American Airlines
Sat 19/96:30 a.m.
YYZ
-
STL
1 stop11h 18m
American Airlines
Deal found 28/7C$ 524
Thu 8/1010:35 a.m.
STL
-
YYZ
2 stops33h 20m
Multiple Airlines
Mon 12/107:45 a.m.
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 25/7C$ 546
Sat 22/85:00 a.m.
STL
-
YYZ
1 stop12h 30m
American Airlines
Thu 3/911:39 a.m.
YYZ
-
STL
1 stop8h 48m
American Airlines
Deal found 29/7C$ 553
Fri 25/92:29 p.m.
STL
-
YYZ
2 stops22h 36m
Multiple Airlines
Mon 28/99:50 a.m.
YYZ
-
STL
1 stop7h 44m
Multiple Airlines
Deal found 29/7C$ 556
Mon 26/108:34 p.m.
STL
-
YYZ
1 stop16h 31m
Multiple Airlines
Wed 28/105:15 p.m.
YYZ
-
STL
1 stop27h 24m
Multiple Airlines
Deal found 27/7C$ 559
Fri 30/1010:56 a.m.
MCI
-
YYZ
1 stop11h 59m
Multiple Airlines
Sun 1/114:20 p.m.
YYZ
-
MCI
1 stop17h 06m
Multiple Airlines
Deal found 29/7C$ 559
Sat 29/85:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Sun 6/97:20 a.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Deal found 29/7C$ 560

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 30 July 2026.

Round-trip from

C$ 500

One-way from

C$ 213

Popular in

August

Cheapest in

April

Average price

C$ 965

Good one-way deal

C$ 260 or less
29/10-2/11
  • 29/10-2/11
  • 3 total stops
  • 43h 49m total
  • Missouri to Ontario
Search Deals
26/8
  • 26/8
  • 2 total stops
  • 25h 39m total
  • Missouri to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Missouri to Ontario.
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 30 July 2026.
Use the filters below to find and compare flights from Missouri to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Thu 5/11

6:35 p.m.-8:32 a.m.

1 stop12h 57m

Montreal Pierre Elliott Trudeau Intl

Wed 18/11

7:44 p.m.-9:25 a.m.

1 stop14h 41m

C$ 675

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 3/11

6:35 p.m.-8:32 a.m.

1 stop12h 57m

Montreal Pierre Elliott Trudeau Intl

Sat 21/11

7:44 p.m.-9:25 a.m.

1 stop14h 41m

C$ 675

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 1/9

6:36 p.m.-10:40 a.m.

1 stop15h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

2:20 p.m.-7:32 p.m.

1 stop6h 12m

C$ 697

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Mon 4/1

6:55 p.m.-8:42 a.m.

1 stop12h 47m

Montreal Pierre Elliott Trudeau Intl

Fri 8/1

2:25 p.m.-10:25 p.m.

1 stop9h 00m

C$ 703

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Wed 25/11

6:45 a.m.-5:54 p.m.

1 stop10h 09m

Toronto Pearson Intl

Sat 5/12

6:00 a.m.-9:39 a.m.

1 stop4h 39m

C$ 715

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 20/10

2:56 p.m.-10:52 p.m.

1 stop6h 56m

Montreal Pierre Elliott Trudeau Intl

Sat 24/10

7:40 a.m.-4:27 p.m.

1 stop9h 47m

C$ 738

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sat 15/8

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

1 stop9h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

9:45 a.m.-2:18 p.m.

1 stop5h 33m

C$ 738

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Tue 8/9

3:59 p.m.-11:44 p.m.

1 stop6h 45m

Montreal Pierre Elliott Trudeau Intl

Wed 16/9

6:47 p.m.-11:51 p.m.

1 stop6h 04m

C$ 738

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Sun 25/10

7:00 a.m.-5:18 p.m.

1 stop9h 18m

Toronto Pearson Intl

Wed 11/11

7:50 a.m.-6:04 p.m.

1 stop11h 14m

C$ 742

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Thu 5/11

6:35 p.m.-8:32 a.m.

1 stop12h 57m

Montreal Pierre Elliott Trudeau Intl

Thu 19/11

2:30 p.m.-10:25 p.m.

1 stop8h 55m

C$ 746

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, December is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 693). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 1,074). 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 30 July 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 30 July 2026.

The most flights from USMO to CAON are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Missouri to Region of Ontario?

Airfare is below average for this route at the moment.
Missouri to Region of Ontario flights typically cost between C$ 714 and C$ 1,059 in October.
The cheapest round-trip price found within the last 5 days was C$ 500 on Multiple Airlines (29 Oct-2 Nov).

How far ahead should I book a flight from Missouri to Region of Ontario?

Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from Missouri to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 30 July 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
11,407 reviews
Check prices

Comfort

7.1

Overall

7.1

Crew

7.8

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Air Canada
7.1
Good
11,407 reviews
Air Canada
7.1
Good
11,407 reviews
Check prices

Comfort

7.1

Overall

7.1

Crew

7.8

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given

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?

    Delta, American Airlines, and United Airlines can get you from Missouri to Region of Ontario in just under 8h 26m. Your travel time can differ by up to 6h 38m. The distance from Missouri to Region of Ontario is about 1556 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, December is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 693). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 1,074). 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 30 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 333AverageC$ 742FlexibilityNo 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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