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Cheap flights from Missouri to Ontario from C$ 175

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Ontario departing on 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Missouri to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:11 p.m. - 2:20 p.m.STL-YYZ
20h 09m1 stop
Multiple Airlines Logo
7:10 a.m. - 10:37 p.m.YYZ-STL
16h 27m1 stop
C$ 331Multiple Airlines
Find Deal
Sat, 10 Jan - Fri, 16 Jan
Multiple Airlines Logo
5:11 p.m. - 2:20 p.m.STL-YYZ
20h 09m1 stop
Multiple Airlines Logo
7:15 a.m. - 10:37 p.m.YYZ-STL
16h 22m2 stops
C$ 340Multiple Airlines
Find Deal
Sat, 10 Jan - Thu, 15 Jan
American Airlines Logo
10:03 a.m. - 9:29 p.m.STL-YYZ
10h 26m1 stop
American Airlines Logo
6:00 a.m. - 6:03 p.m.YYZ-STL
13h 03m1 stop
C$ 387American Airlines
Find Deal
Sat, 14 Feb - Sat, 21 Feb
American Airlines Logo
5:15 a.m. - 4:03 p.m.STL-YYZ
9h 48m1 stop
American Airlines Logo
6:23 p.m. - 8:35 a.m.YYZ-STL
15h 12m1 stop
C$ 401American Airlines
Find Deal
Tue, 16 Dec - Tue, 23 Dec
United Airlines Logo
11:32 a.m. - 9:18 p.m.MCI-YOW
8h 46m1 stop
United Airlines Logo
2:15 p.m. - 8:06 p.m.YOW-MCI
6h 51m1 stop
C$ 510United Airlines
Find Deal
Tue, 3 Mar - Wed, 4 Mar
United Airlines Logo
5:54 a.m. - 4:30 p.m.MCI-YOW
9h 36m2 stops
United Airlines Logo
2:15 p.m. - 8:06 p.m.YOW-MCI
6h 51m1 stop
C$ 522United Airlines
Find Deal
Tue, 3 Mar - Wed, 4 Mar
Alaska Airlines Logo
2:45 p.m. - 3:35 p.m.MCI-YYZ
23h 50m1 stop
Alaska Airlines Logo
4:45 p.m. - 3:05 p.m.YYZ-MCI
23h 20m2 stops
C$ 679Alaska Airlines
Find Deal
Mon, 19 Jan - Thu, 22 Jan
Alaska Airlines Logo
2:38 p.m. - 3:35 p.m.MCI-YYZ
23h 57m1 stop
Alaska Airlines Logo
4:45 p.m. - 1:42 p.m.YYZ-MCI
21h 57m1 stop
C$ 709Alaska Airlines
Find Deal
Sun, 8 Feb - Fri, 13 Feb
Air Canada Logo
4:05 p.m. - 11:22 p.m.STL-YUL
6h 17m1 stop
Air Canada Logo
10:10 a.m. - 3:29 p.m.YUL-STL
6h 19m1 stop
C$ 879Air Canada
Find Deal
Mon, 1 Dec - Sun, 7 Dec
Air Canada Logo
4:05 p.m. - 12:32 a.m.STL-YUL
7h 27m1 stop
Air Canada Logo
8:50 a.m. - 3:29 p.m.YUL-STL
7h 39m2 stops
C$ 922Air Canada
Find Deal
Mon, 1 Dec - Sun, 7 Dec

American Airlines flights from Missouri to Region of Ontario

Our best American Airlines deals on Missouri to Region of Ontario flight tickets
American Airlines
14 Feb
STL10:03 a.m.Lambert-St Louis
10h 26m
1 stop
YYZ9:29 p.m.Toronto Pearson Intl
21 Feb
YYZ6:00 a.m.Toronto Pearson Intl
13h 03m
1 stop
STL6:03 p.m.Lambert-St Louis
C$ 387
Find similar
American Airlines
16 Dec
STL5:15 a.m.Lambert-St Louis
9h 48m
1 stop
YYZ4:03 p.m.Toronto Pearson Intl
23 Dec
YYZ6:23 p.m.Toronto Pearson Intl
15h 12m
1 stop
STL8:35 a.m.Lambert-St Louis
C$ 401
Find similar
American Airlines
24 Dec
STL6:00 a.m.Lambert-St Louis
9h 39m
2 stops
YYZ4:39 p.m.Toronto Pearson Intl
30 Dec
YYZ6:00 a.m.Toronto Pearson Intl
8h 23m
1 stop
STL1:23 p.m.Lambert-St Louis
C$ 414
Find similar

Alaska Airlines flights from Missouri to Region of Ontario

Our best Alaska Airlines deals on Missouri to Region of Ontario flight tickets
Alaska Airlines
19 Jan
MCI2:45 p.m.Kansas City
23h 50m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
22 Jan
YYZ4:45 p.m.Toronto Pearson Intl
23h 20m
2 stops
MCI3:05 p.m.Kansas City
C$ 679
Find similar
Alaska Airlines
8 Feb
MCI2:38 p.m.Kansas City
23h 57m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
13 Feb
YYZ4:45 p.m.Toronto Pearson Intl
21h 57m
1 stop
MCI1:42 p.m.Kansas City
C$ 709
Find similar
Alaska Airlines
23 Jan
MCI2:45 p.m.Kansas City
23h 50m
1 stop
YYZ3:35 p.m.Toronto Pearson Intl
26 Jan
YYZ4:45 p.m.Toronto Pearson Intl
22h 05m
1 stop
MCI1:50 p.m.Kansas City
C$ 734
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Region of 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, momondo users made 96,600 searches. Data last updated 4 November 2025.
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

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 10/1

5:11 p.m.-2:20 p.m.

1 stop20h 09m

Toronto Pearson Intl

Fri 16/1

7:10 a.m.-10:37 p.m.

1 stop16h 27m

C$ 331

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 10/1

5:11 p.m.-2:20 p.m.

1 stop20h 09m

Toronto Pearson Intl

Thu 15/1

7:15 a.m.-10:37 p.m.

2 stops16h 22m

C$ 340

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 14/2

10:03 a.m.-9:29 p.m.

1 stop10h 26m

Toronto Pearson Intl

Sat 21/2

6:00 a.m.-6:03 p.m.

1 stop13h 03m

C$ 387

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 16/12

5:15 a.m.-4:03 p.m.

1 stop9h 48m

Toronto Pearson Intl

Tue 23/12

6:23 p.m.-8:35 a.m.

1 stop15h 12m

C$ 401

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Tue 3/3

11:32 a.m.-9:18 p.m.

1 stop8h 46m

Ottawa

Wed 4/3

2:15 p.m.-8:06 p.m.

1 stop6h 51m

C$ 510

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

Tue 3/3

5:54 a.m.-4:30 p.m.

2 stops9h 36m

Ottawa

Wed 4/3

2:15 p.m.-8:06 p.m.

1 stop6h 51m

C$ 522

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Mon 19/1

2:45 p.m.-3:35 p.m.

1 stop23h 50m

Toronto Pearson Intl

Thu 22/1

4:45 p.m.-3:05 p.m.

2 stops23h 20m

C$ 679

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Sun 8/2

2:38 p.m.-3:35 p.m.

1 stop23h 57m

Toronto Pearson Intl

Fri 13/2

4:45 p.m.-1:42 p.m.

1 stop21h 57m

C$ 709

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/12

4:05 p.m.-11:22 p.m.

1 stop6h 17m

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

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

1 stop6h 19m

C$ 879

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Mon 1/12

4:05 p.m.-12:32 a.m.

1 stop7h 27m

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

8:50 a.m.-3:29 p.m.

2 stops7h 39m

C$ 922

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from Missouri to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Region of Ontario?

In general, February is the cheapest month to fly from Missouri to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 729. If you are unable to visit Region of Ontario during the month of February, then departing from Missouri during the month June is also very affordable. Most momondo users find prices during this month for around C$ 942.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from Missouri to Region of Ontario is on a Friday. Travellers who choose to depart for Region of Ontario on a Friday will often find tickets for as low as C$ 521. The most expensive day to fly to Region of Ontario is Sunday, with ticket prices averaging around C$ 942.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is at noon. Flights from Missouri to Region of Ontario during this time can be as low as C$ 602. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 779 on average. Flights to Region of Ontario from Missouri in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Missouri to Ontario flight route?

Fly from Lambert-St Louis to Toronto Pearson Intl for the best Missouri - Ontario flight prices

What cabin class options are available on Missouri to Ontario flights?

There is only 1 cabin class available to choose from on Missouri to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Missouri to Region of Ontario flights?

No. A direct flight is the cheapest option for a flight between Missouri to Region of Ontario.

Cheap Missouri to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Region of Ontario

Best price found

C$ 476

Fastest flight time

1h 57m

Direct flights

Every day

Airports in Region of Ontario

1 airport
The best flight deal from Missouri to Region of Ontario found on momondo in the last 72 hours is C$ 476
The fastest flight from Missouri to Region of Ontario takes 1h 57m
Direct flights go from Missouri to Region of Ontario every day.
There is 1 airport near Region of Ontario: Toronto Pearson Intl (YYZ)
Search flight deals

  • When did momondo last update prices for flights from Missouri to Ontario?

    Prices for flights from Missouri to Ontario are refreshed on a daily basis.

  • How many operators does momondo search for flights from Missouri to Ontario?

  • How old do you have to be to fly from Missouri to Ontario?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Missouri to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Missouri to Region of Ontario?

Best airlines flying from Missouri to Region of Ontario

Compare and see reviews for airlines that fly from Missouri to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 306Free CancellationRating
7.1
10,403 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Missouri to Ontario . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Missouri to Ontario with flexible booking policies on momondo?

Flights from Missouri to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Missouri to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Missouri to Ontario.

I’m not ready to book a flight from Missouri to Ontario right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Missouri to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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