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Cheap flights from Missouri to Ontario from C$ 195

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
31 May — 7 Jun1
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 1 May 2026.

Thu 28/56:33 p.m.
STL
-
YYZ
2 stops42h 32m
Multiple Airlines
Thu 4/69:50 a.m.
YYZ
-
STL
1 stop15h 07m
Multiple Airlines
Deal found 28/4C$ 457
Wed 27/55:27 p.m.
STL
-
YYZ
2 stops26h 33m
Multiple Airlines
Wed 3/67:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 27/4C$ 490
Wed 27/56:00 a.m.
STL
-
YYZ
1 stop10h 44m
American Airlines
Wed 3/611:39 a.m.
YYZ
-
STL
1 stop9h 51m
American Airlines
Deal found 28/4C$ 501
Tue 2/64:19 p.m.
STL
-
YYZ
2 stops28h 36m
Multiple Airlines
Sat 6/67:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 27/4C$ 509
Tue 23/61:45 p.m.
STL
-
YYZ
1 stop8h 44m
American Airlines
Tue 30/67:25 a.m.
YYZ
-
STL
1 stop10h 08m
American Airlines
Deal found 27/4C$ 528
Wed 27/56:00 a.m.
STL
-
YYZ
1 stop7h 30m
American Airlines
Thu 28/51:15 p.m.
YYZ
-
STL
1 stop8h 15m
American Airlines
Deal found 26/4C$ 537
Wed 27/55:27 p.m.
STL
-
YYZ
2 stops19h 38m
Multiple Airlines
Sat 30/57:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Deal found 29/4C$ 539
Wed 10/64:17 p.m.
STL
-
YYZ
1 stop21h 13m
Multiple Airlines
Wed 17/64:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 26/4C$ 543
Fri 5/610:35 a.m.
MCI
-
YYZ
1 stop12h 00m
Multiple Airlines
Thu 11/61:30 p.m.
YYZ
-
MCI
2 stops28h 51m
Multiple Airlines
Deal found 25/4C$ 569
Sat 13/61:05 p.m.
STL
-
YUL
Nonstop2h 35m
Air Canada
Sat 20/68:10 a.m.
YUL
-
STL
1 stop5h 11m
Air Canada
Deal found 29/4C$ 612
Fri 29/510:35 a.m.
MCI
-
YYZ
2 stops26h 30m
Multiple Airlines
Thu 4/69:50 a.m.
YYZ
-
MCI
1 stop24h 39m
Multiple Airlines
Deal found 29/4C$ 637
Wed 3/610:35 a.m.
MCI
-
YYZ
1 stop29h 10m
Multiple Airlines
Tue 9/69:30 a.m.
YYZ
-
MCI
2 stops32h 51m
Multiple Airlines
Deal found 25/4C$ 641

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 1 May 2026.

Round-trip from

C$ 457

One-way from

C$ 195

Popular in

November

Cheapest in

June

Average price

C$ 666

Good round-trip deal

C$ 284 or less

Good one-way deal

C$ 326 or less
28/5-4/6
  • 28/5-4/6
  • 3 total stops
  • 57h 39m total
  • Missouri to Ontario
Search Deals
9/6
  • 9/6
  • 1 total stop
  • 26h 48m total
  • Missouri to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Missouri to Ontario.
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 1 May 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. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 4/6

7:03 a.m.-5:44 p.m.

1 stop9h 41m

Toronto Pearson Intl

Sun 7/6

7:25 a.m.-1:14 p.m.

1 stop6h 49m

C$ 660

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 30/5

1:45 p.m.-11:24 p.m.

1 stop8h 39m

Toronto Pearson Intl

Sat 6/6

7:25 a.m.-1:56 p.m.

1 stop7h 31m

C$ 660

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 25/5

5:10 a.m.-3:14 p.m.

1 stop9h 04m

Toronto Pearson Intl

Mon 25/5

5:15 p.m.-10:52 p.m.

1 stop6h 37m

C$ 688

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Wed 1/7

9:50 a.m.-4:45 p.m.

1 stop29h 55m

Toronto Pearson Intl

Tue 7/7

7:45 a.m.-8:55 a.m.

1 stop26h 10m

C$ 701
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 29/5

7:05 a.m.-9:56 a.m.

Nonstop1h 51m

Toronto Pearson Intl

Fri 5/6

11:00 a.m.-12:06 p.m.

Nonstop2h 06m

C$ 703

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 30/5

7:05 a.m.-9:56 a.m.

Nonstop1h 51m

Toronto Pearson Intl

Sat 6/6

11:00 a.m.-12:06 p.m.

Nonstop2h 06m

C$ 703

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 30/5

1:05 p.m.-7:58 p.m.

1 stop5h 53m

Toronto Pearson Intl

Wed 3/6

7:00 p.m.-8:09 p.m.

Nonstop2h 09m

C$ 715

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/6

5:41 p.m.-11:59 p.m.

1 stop5h 18m

Toronto Pearson Intl

Fri 19/6

8:50 a.m.-12:11 p.m.

1 stop4h 21m

C$ 722

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 19/6

1:39 p.m.-11:55 p.m.

1 stop9h 16m

Montreal Pierre Elliott Trudeau Intl

Sun 21/6

6:50 p.m.-11:56 p.m.

1 stop6h 06m

C$ 723

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 12/6

6:10 p.m.-11:28 p.m.

1 stop4h 18m

Montreal Pierre Elliott Trudeau Intl

Fri 19/6

6:00 a.m.-1:09 p.m.

1 stop8h 09m

C$ 723

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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

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.

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$ 134). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 577). 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 1 May 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.

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 1 May 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
10,983 reviews
Check prices

Comfort

7.1

Food

6.3

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.
Air Canada
7.1
Good
10,983 reviews
Air Canada
7.1
Good
10,983 reviews
Check prices

Comfort

7.1

Food

6.3

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.

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 Air Canada can get you from Missouri to Region of Ontario in just under 1h 51m. Your travel time can differ by up to 7h 13m. The distance from Missouri to Region of Ontario is about 1051 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$ 134). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 577). 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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 323AverageC$ 636FlexibilityNo 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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