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Cheap flights from Missouri to Ontario from C$ 222

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — YYZ
14 Jul — 21 Jul1
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 14 June 2026.

Tue 21/76:55 a.m.
STL
-
YYZ
1 stop9h 39m
American Airlines
Tue 28/71:17 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 12/6C$ 515
Wed 2/96:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Sat 5/93:13 p.m.
YYZ
-
STL
1 stop9h 45m
American Airlines
Deal found 12/6C$ 564
Sat 22/89:32 a.m.
STL
-
YYZ
1 stop12h 57m
American Airlines
Tue 25/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Deal found 13/6C$ 575
Wed 8/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Wed 15/73:50 p.m.
YYZ
-
STL
2 stops27h 25m
Multiple Airlines
Deal found 10/6C$ 585
Thu 2/712:11 p.m.
STL
-
YYZ
1 stop17h 28m
Multiple Airlines
Sun 5/74:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 9/6C$ 600
Wed 19/86:58 p.m.
STL
-
YYZ
1 stop10h 41m
Multiple Airlines
Sun 23/84:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 11/6C$ 606
Fri 28/85:33 p.m.
STL
-
YYZ
2 stops17h 27m
Multiple Airlines
Mon 31/87:00 a.m.
YYZ
-
STL
1 stop13h 36m
Multiple Airlines
Deal found 11/6C$ 607
Thu 10/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Thu 17/93:13 p.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Deal found 12/6C$ 611
Tue 18/86:33 p.m.
STL
-
YYZ
2 stops16h 27m
Multiple Airlines
Tue 25/87:00 a.m.
YYZ
-
STL
1 stop12h 08m
Multiple Airlines
Deal found 10/6C$ 613
Tue 22/912:19 p.m.
MCI
-
YYZ
1 stop10h 07m
American Airlines
Tue 29/96:30 a.m.
YYZ
-
MCI
1 stop9h 52m
American Airlines
Deal found 11/6C$ 613
Sat 22/85:33 p.m.
STL
-
YYZ
2 stops17h 27m
Multiple Airlines
Tue 25/87:00 a.m.
YYZ
-
STL
1 stop12h 08m
Multiple Airlines
Deal found 13/6C$ 615
Wed 29/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Sat 1/81:30 p.m.
YYZ
-
STL
2 stops29h 07m
Multiple Airlines
Deal found 13/6C$ 617

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 14 June 2026.

Round-trip from

C$ 515

One-way from

C$ 222

Popular in

November

Cheapest in

December

Average price

C$ 765

Good round-trip deal

C$ 608 or less
American Airlines
  • American Airlines
  • 21/7-28/7
  • 2 total stops
  • 21h 38m total
  • Missouri to Ontario
Search Deals
American Airlines
  • American Airlines
  • 7/7
  • 1 total stop
  • 7h 57m total
  • Missouri to Ontario
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 14 June 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

Tue 25/8

5:00 a.m.-4:53 p.m.

1 stop10h 53m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

12:30 p.m.-12:35 a.m.

1 stop13h 05m

C$ 766

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 25/8

8:00 a.m.-5:01 p.m.

1 stop8h 01m

Toronto Pearson Intl

Sat 29/8

8:05 a.m.-3:31 p.m.

1 stop8h 26m

C$ 793

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/9

5:30 p.m.-12:13 a.m.

1 stop5h 43m

Toronto Pearson Intl

Thu 17/9

12:55 p.m.-2:00 p.m.

Nonstop2h 05m

C$ 804

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 2/12

7:00 a.m.-5:03 p.m.

1 stop9h 03m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

11:15 a.m.-5:52 p.m.

1 stop7h 37m

C$ 808

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sat 17/10

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

1 stop6h 09m

Montreal Pierre Elliott Trudeau Intl

Sat 24/10

9:45 a.m.-3:53 p.m.

1 stop7h 08m

C$ 808

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 4/9

5:30 p.m.-12:13 a.m.

1 stop5h 43m

Toronto Pearson Intl

Mon 7/9

2:00 p.m.-6:42 p.m.

1 stop5h 42m

C$ 817

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sat 8/8

3:16 p.m.-9:26 p.m.

1 stop5h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 12/8

6:00 a.m.-4:07 p.m.

2 stops11h 07m

C$ 822

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 8/7

7:53 a.m.-5:30 p.m.

1 stop8h 37m

Montreal Pierre Elliott Trudeau Intl

Wed 15/7

6:00 a.m.-4:00 p.m.

2 stops11h 00m

C$ 822

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 4/9

5:30 p.m.-12:13 a.m.

1 stop5h 43m

Toronto Pearson Intl

Mon 7/9

8:50 a.m.-3:00 p.m.

1 stop7h 10m

C$ 827

SpringfieldToronto

SGF - YYZ

SGFYYZ

Springfield-Branson

Mon 13/7

7:53 p.m.-12:37 p.m.

1 stop15h 44m

Toronto Pearson Intl

Mon 20/7

11:39 a.m.-10:37 p.m.

1 stop11h 58m

C$ 831

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/6

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$ 137). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 592). 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 14 June 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?

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 14 June 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
11,178 reviews
Check prices

Comfort

7.1

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

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
11,178 reviews
Air Canada
7.1
Good
11,178 reviews
Check prices

Comfort

7.1

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

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 Delta can get you from Missouri to Region of Ontario in just under 8h 01m. Your travel time can differ by up to 2h 52m. 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$ 137). Flying from Missouri to Region of Ontario in January is currently the most expensive (average of C$ 592). 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 14 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 331AverageC$ 652FlexibilityNo 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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