How many flights depart from Missouri to Region of Ontario on average per week?

As of April 2026, 21 flights take off from Missouri and land in Region of Ontario each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

What airlines fly to Region of Ontario?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Region of Ontario from Missouri according to our data. Air Canada is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 5 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

How long is the flight from Missouri to Region of Ontario?

Average flight duration from Missouri to Region of Ontario depends on which airport you fly into and out of. Flying from St. Louis to Toronto Pearson Intl Airport is 1h 51m on average, while flying from Kansas City to Toronto Pearson Intl Airport is 4h 12m on average. Toronto Pearson Intl Airport is the most popular airport in Region of Ontario.

What is the cheapest airline that flies from Missouri to Ontario?

American Airlines, Air Canada, and United Airlines are the most popular carriers operating from Missouri to Ontario

How many flights depart from Missouri to Region of Ontario on average per day?

3 flights are operational daily from Missouri to Region of Ontario as of April 2026. The most popular departure time for this route is 4:00PM, with 100% of flights per day taking off in the afternoon.

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?

As of April 2026, there are 5 operators available to choose from for flights from Missouri to Ontario.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Missouri to Ontario.

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

The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$138 Cheap Flights from Missouri to Ontario in 2026

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Find the cheapest flights from Missouri to Ontario

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:15 pm - 9:16 pm

STL

YOW

6h 01m

1 stop

7:00 am - 12:06 pm

YOW

STL

6h 06m

1 stop

$303Air Canada

Mon, May 4 - Mon, May 11

4:17 pm - 8:05 pm

STL

YYZ

26h 48m

1 stop

7:45 am - 12:09 am

YYZ

STL

17h 24m

1 stop

$313Multiple Airlines

Thu, Jun 11 - Mon, Jun 15

4:17 pm - 4:45 pm

STL

YYZ

23h 28m

1 stop

4:50 pm - 12:09 am

YYZ

STL

8h 19m

1 stop

$322Multiple Airlines

Thu, Jun 11 - Sun, Jun 14

7:00 am - 5:44 pm

STL

YYZ

9h 44m

1 stop

11:39 am - 8:30 pm

YYZ

STL

9h 51m

1 stop

$333American Airlines

Wed, Jun 17 - Wed, Jun 24

1:05 pm - 8:46 pm

STL

YOW

6h 41m

1 stop

3:00 pm - 8:25 pm

YOW

STL

6h 25m

1 stop

$333Air Canada

Wed, May 13 - Sun, May 17

7:05 am - 1:05 pm

STL

YOW

5h 00m

1 stop

2:40 pm - 8:25 pm

YOW

STL

6h 45m

1 stop

$338Air Canada

Tue, May 12 - Sat, May 16

7:09 pm - 9:11 am

STL

YOW

13h 02m

2 stops

2:00 pm - 8:09 pm

YOW

STL

7h 09m

1 stop

$348Air Canada

Mon, May 4 - Mon, May 11

9:08 am - 5:44 pm

STL

YYZ

7h 36m

1 stop

11:39 am - 7:22 pm

YYZ

STL

8h 43m

1 stop

$354American Airlines

Wed, Jun 17 - Wed, Jun 24

9:23 am - 9:35 pm

STL

YOW

11h 12m

1 stop

6:25 am - 12:11 pm

YOW

STL

6h 46m

1 stop

$363United Airlines

Mon, Jun 1 - Mon, Jun 8

7:45 am - 9:35 pm

STL

YOW

12h 50m

1 stop

6:00 am - 9:13 pm

YOW

STL

16h 13m

2 stops

$373United Airlines

Sun, May 10 - Wed, May 13

American Airlines flights from Missouri to Region of Ontario

Our best American Airlines deals on Missouri to Region of Ontario flight tickets

American Airlines

May 5

STL5:51 amLambert-St Louis

11h 42m

1 stop

YYZ6:33 pmToronto Pearson Intl

May 12

YYZ3:13 pmToronto Pearson Intl

8h 06m

1 stop

STL10:19 pmLambert-St Louis

$333

American Airlines

Jun 17

STL9:08 amLambert-St Louis

7h 36m

1 stop

YYZ5:44 pmToronto Pearson Intl

Jun 24

YYZ11:39 amToronto Pearson Intl

8h 43m

1 stop

STL7:22 pmLambert-St Louis

$354

American Airlines

May 27

STL2:36 pmLambert-St Louis

7h 48m

1 stop

YYZ11:24 pmToronto Pearson Intl

May 30

YYZ1:15 pmToronto Pearson Intl

11h 39m

1 stop

STL11:54 pmLambert-St Louis

$369

Air Canada flights from Missouri to Region of Ontario

Our best Air Canada deals on Missouri to Region of Ontario flight tickets

Air Canada

May 4

STL2:15 pmLambert-St Louis

6h 01m

1 stop

YOW9:16 pmOttawa

May 11

YOW7:00 amOttawa

6h 06m

1 stop

STL12:06 pmLambert-St Louis

$303

Air Canada

May 13

STL1:05 pmLambert-St Louis

6h 41m

1 stop

YOW8:46 pmOttawa

May 17

YOW3:00 pmOttawa

6h 25m

1 stop

STL8:25 pmLambert-St Louis

$333

Air Canada

May 12

STL7:05 amLambert-St Louis

5h 00m

1 stop

YOW1:05 pmOttawa

May 16

YOW2:40 pmOttawa

6h 45m

1 stop

STL8:25 pmLambert-St Louis

$338

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 5/4

2:15 pm-9:16 pm

1 stop6h 01m

Ottawa

Mon 5/11

7:00 am-12:06 pm

1 stop6h 06m

$303

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/11

4:17 pm-8:05 pm

1 stop26h 48m

Toronto Pearson Intl

Mon 6/15

7:45 am-12:09 am

1 stop17h 24m

$313

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/11

4:17 pm-4:45 pm

1 stop23h 28m

Toronto Pearson Intl

Sun 6/14

4:50 pm-12:09 am

1 stop8h 19m

$322

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 6/17

7:00 am-5:44 pm

1 stop9h 44m

Toronto Pearson Intl

Wed 6/24

11:39 am-8:30 pm

1 stop9h 51m

$333

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 5/13

1:05 pm-8:46 pm

1 stop6h 41m

Ottawa

Sun 5/17

3:00 pm-8:25 pm

1 stop6h 25m

$333

Quickest round-trip

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 5/12

7:05 am-1:05 pm

1 stop5h 00m

Ottawa

Sat 5/16

2:40 pm-8:25 pm

1 stop6h 45m

$338

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 5/4

7:09 pm-9:11 am

2 stops13h 02m

Ottawa

Mon 5/11

2:00 pm-8:09 pm

1 stop7h 09m

$348

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 6/17

9:08 am-5:44 pm

1 stop7h 36m

Toronto Pearson Intl

Wed 6/24

11:39 am-7:22 pm

1 stop8h 43m

$354

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Mon 6/1

9:23 am-9:35 pm

1 stop11h 12m

Ottawa

Mon 6/8

6:25 am-12:11 pm

1 stop6h 46m

$363

St. LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 5/10

7:45 am-9:35 pm

1 stop12h 50m

Ottawa

Wed 5/13

6:00 am-9:13 pm

2 stops16h 13m

$373

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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

The month of June is, on average, the cheapest month to fly to Region of Ontario from Missouri, with most prices found around $403. If you aren’t able to travel during the month of June, then book flights to Region of Ontario from Missouri during December instead. Flights to Region of Ontario in December, while not as cheap as those in June, still average around $469.

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

According to our data, Tuesday is the cheapest day to fly to Region of Ontario from Missouri. The lowest ticket price found for a Tuesday departure recently was $832. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Missouri to Region of Ontario on a Thursday will generally be more expensive and average around $927. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Missouri to Region of Ontario in the afternoon for as low as $811. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $1,046.

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 are 4 cabin classes 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?

You could potentially save up to 39% on your flight if you consider stops on a Missouri to Region of Ontario flight.

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	$464
Fastest flight time	1h 51m
Direct flights	Every day
Airports in Region of Ontario	123 airports

The best one-way flight to Region of Ontario from Missouri in the past 72 hours is $464. The best round-trip flight deal from Missouri to Region of Ontario found on momondo in the last 72 hours is $806.

The fastest flight from Missouri to Region of Ontario takes 1h 51m

Direct flights go from Missouri to Region of Ontario every day.

There are 123 airports in Region of Ontario. From Missouri there are direct flights to Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ).

Search flight deals

Frequently asked questions about flying from Missouri to Ontario

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?
As of April 2026, there are 5 operators available to choose from for flights from Missouri to Ontario.
How old do you have to be to fly from Missouri to Ontario?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Missouri to Ontario.
What documentation or ID do you need to fly to Ontario?
The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Missouri to Region of Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Missouri to Region of Ontario is Embraer 175 (24.84% of total bookings). The next most popular plane models are Boeing 787-8 Dreamliner (18.47%), Canadair (Bombardier) Regional Jet 900 (17.83%), and Airbus A220-300 (14.01%).

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 Canada	PriceFrom $139	Free Cancellation	Rating 7.1 10,915 reviews	Search Air Canada flights
United Airlines	PriceFrom $199	Free Cancellation	Rating 7.4 9,562 reviews	Search United Airlines flights
American Airlines	PriceFrom $270	Free Cancellation	Rating 7.1 11,564 reviews	Search American Airlines flights
Delta	PriceFrom $473	Free Cancellation	Rating 7.9 8,400 reviews	Search Delta flights
WestJet	PriceFrom $593	Free Cancellation	Rating 7.2 3,320 reviews	Search WestJet flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Missouri.

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?

Once you have performed a search for Missouri to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Missouri to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

An easier way to manage your Region of Ontario trip

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Popular cities in Ontario

Flights to Torontofrom $169

Flights to Vancouverfrom $143

Flights to Montrealfrom $181

Flights to Calgaryfrom $210

Flights to Ottawafrom $218

Flights to Halifaxfrom $245

Flights to Winnipegfrom $265

Flights to Québec Cityfrom $304

Flights to Saskatoonfrom $231

Flights to Kelownafrom $221

Flights to St. John'sfrom $377

Flights to Reginafrom $291

Cheap flights from Missouri to Ontario from $138

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 6/14. 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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American Airlines flights from Missouri to Region of Ontario

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

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

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

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

What is the cheapest Missouri to Ontario flight route?

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

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

What is the cheapest airline that flies from Missouri to Ontario?

What airlines fly to Region of Ontario?

How many flights depart from Missouri to Region of Ontario on average per day?

How many flights depart from Missouri to Region of Ontario on average per week?

How long is the flight from 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

Fastest flight time

Direct flights

Airports in Region of Ontario

Frequently asked questions about flying from Missouri to 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

Why use momondo?

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

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