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Cheap flights from Missouri to Ontario from C$ 207

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
12 Apr — 19 Apr1
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 13 March 2026.

Mon 30/35:08 p.m.
MCI
-
YYZ
2 stops20h 12m
Multiple Airlines
Tue 7/43:40 p.m.
YYZ
-
MCI
1 stop20h 49m
Multiple Airlines
Deal found 8/3C$ 468
Wed 8/48:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Wed 15/412:30 p.m.
YUL
-
STL
1 stop10h 47m
American Airlines
Deal found 10/3C$ 521
Tue 31/311:27 a.m.
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Mon 6/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Deal found 10/3C$ 525
Fri 3/412:24 p.m.
MCI
-
YYZ
1 stop25h 16m
Multiple Airlines
Tue 7/43:40 p.m.
YYZ
-
MCI
1 stop20h 49m
Multiple Airlines
Deal found 12/3C$ 533
Tue 7/47:00 a.m.
STL
-
YYZ
1 stop10h 33m
American Airlines
Tue 14/46:15 a.m.
YYZ
-
STL
1 stop10h 45m
American Airlines
Deal found 10/3C$ 535
Tue 31/311:27 a.m.
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Thu 9/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Deal found 10/3C$ 540
Wed 1/412:24 p.m.
MCI
-
YYZ
1 stop30h 31m
Multiple Airlines
Mon 6/47:55 p.m.
YYZ
-
MCI
2 stops25h 03m
Multiple Airlines
Deal found 9/3C$ 540
Sat 11/48:03 p.m.
STL
-
YUL
1 stop14h 41m
American Airlines
Sat 18/412:30 p.m.
YUL
-
STL
1 stop12h 16m
American Airlines
Deal found 12/3C$ 546
Thu 2/46:29 p.m.
STL
-
YYZ
2 stops18h 51m
Multiple Airlines
Tue 7/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Deal found 12/3C$ 547
Tue 14/44:59 p.m.
STL
-
YYZ
1 stop20h 21m
Multiple Airlines
Fri 17/42:20 p.m.
YYZ
-
STL
2 stops17h 30m
Multiple Airlines
Deal found 10/3C$ 552
Wed 1/44:54 p.m.
STL
-
YYZ
1 stop20h 26m
Multiple Airlines
Wed 8/45:20 p.m.
YYZ
-
STL
2 stops25h 14m
Multiple Airlines
Deal found 10/3C$ 554
Wed 1/44:54 p.m.
STL
-
YYZ
1 stop20h 26m
Multiple Airlines
Mon 6/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Deal found 10/3C$ 558

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 13 March 2026.

Round-trip from

C$ 468

One-way from

C$ 207

Popular in

November

Cheapest in

June

Average price

C$ 475

Good round-trip deal

C$ 322 or less
30/3-7/4
  • 30/3-7/4
  • 3 total stops
  • 41h 01m total
  • Missouri to Ontario
Search Deals
20/4
  • 20/4
  • 2 total stops
  • 16h 42m total
  • Missouri to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip 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 13 March 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

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 11/4

2:33 p.m.-11:44 a.m.

1 stop20h 11m

Montreal Pierre Elliott Trudeau Intl

Sat 18/4

1:03 p.m.-11:46 p.m.

2 stops11h 43m

C$ 559

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Wed 22/4

6:15 a.m.-1:59 p.m.

1 stop6h 44m

Ottawa

Sun 26/4

6:25 a.m.-10:27 a.m.

1 stop5h 02m

C$ 563

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Fri 24/4

7:00 p.m.-10:00 a.m.

2 stops14h 00m

Ottawa

Fri 1/5

2:40 p.m.-11:51 p.m.

2 stops10h 11m

C$ 569

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Sat 1/8

6:36 p.m.-10:03 a.m.

2 stops14h 27m

Ottawa

Tue 4/8

5:50 p.m.-11:59 p.m.

1 stop7h 09m

C$ 631

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Sat 25/4

6:15 a.m.-5:07 p.m.

1 stop9h 52m

Ottawa

Sat 2/5

6:05 a.m.-11:25 a.m.

1 stop6h 20m

C$ 648

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 21/4

7:45 a.m.-6:56 p.m.

1 stop10h 11m

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

1:20 p.m.-9:52 p.m.

1 stop9h 32m

C$ 650

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Mon 20/4

3:21 p.m.-11:54 p.m.

2 stops7h 33m

Ottawa

Tue 21/4

10:00 a.m.-3:02 p.m.

1 stop6h 02m

C$ 654

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 4/4

5:29 p.m.-11:06 p.m.

1 stop4h 37m

Toronto Pearson Intl

Wed 8/4

5:20 p.m.-5:34 p.m.

2 stops25h 14m

C$ 688

JoplinMontreal

JLN - YUL

JLNYUL

Joplin

Fri 17/4

8:56 a.m.-11:51 a.m.

1 stop25h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 21/4

6:30 p.m.-1:12 p.m.

1 stop19h 42m

C$ 713

JoplinMontreal

JLN - YUL

JLNYUL

Joplin

Thu 30/4

9:06 a.m.-11:56 a.m.

1 stop25h 50m

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

6:30 p.m.-1:37 p.m.

1 stop20h 07m

C$ 714

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

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, August is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 220). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 615). 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 13 March 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 13 March 2026.

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

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

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 13 March 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
10,800 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Overall

7.1

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Air Canada
7.1
Good
10,800 reviews
Air Canada
7.1
Good
10,800 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Overall

7.1

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.

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, United Airlines, and Delta can get you from Missouri to Region of Ontario in just under 6h 44m. Your travel time can differ by up to 13h 27m. 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, August is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 220). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 615). 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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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 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 322AverageC$ 634FlexibilityNo 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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