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

As of May 2026, there are 42 flights per week flying from Region of Ontario to Missouri. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

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

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

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

The flight from Region of Ontario to Missouri depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Toronto (a popular airport in Region of Ontario) to St. Louis (the most popular airport in Missouri), then the flight time is 2h 06m on average. If you fly from Ottawa (another popular airport in Region of Ontario) to St. Louis, then the average flight time is 7h 04m.

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

As of May 2026, there are 6 flights per day flying from Region of Ontario to Missouri. The most common time of day flights depart is 11:00AM, with 50% of flights taking off at noon.

What airlines fly to Missouri?

Air Canada, United Airlines and Delta are the top three most popular airlines that fly to Missouri from Region of Ontario according to our data. Air Canada is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 4 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Ontario to Missouri were last updated today.

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

The number of operators available for flights from Ontario to Missouri is 4 as of May 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Missouri.

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

The required travel and health documents for your Missouri 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 Missouri. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$184 Cheap Flights from Ontario to Missouri in 2026

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Find the cheapest flights from Ontario to Missouri

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 pm - 11:29 pm

YOW

STL

7h 04m

1 stop

12:55 pm - 6:48 pm

STL

YOW

4h 53m

1 stop

$351United Airlines

Wed, Jun 3 - Sat, Jun 6

6:00 am - 3:38 pm

YOW

STL

10h 38m

2 stops

1:18 pm - 9:35 pm

STL

YOW

7h 17m

1 stop

$372United Airlines

Wed, Sep 16 - Sat, Sep 19

1:15 pm - 8:30 pm

YYZ

STL

8h 15m

1 stop

7:05 am - 5:44 pm

STL

YYZ

9h 39m

1 stop

$372American Airlines

Tue, Jun 2 - Wed, Jun 3

7:25 am - 2:02 pm

YYZ

STL

7h 37m

1 stop

7:03 am - 5:44 pm

STL

YYZ

9h 41m

1 stop

$380American Airlines

Tue, Jun 9 - Wed, Jun 10

6:00 am - 9:30 pm

YOW

STL

16h 30m

2 stops

12:55 pm - 6:48 pm

STL

YOW

4h 53m

1 stop

$395United Airlines

Wed, Jun 3 - Sat, Jun 6

10:00 am - 2:00 pm

YOW

STL

5h 00m

1 stop

8:55 am - 3:10 pm

STL

YOW

5h 15m

1 stop

$407Air Canada

Thu, Oct 1 - Tue, Oct 6

2:40 pm - 8:25 pm

YOW

STL

6h 45m

1 stop

1:13 pm - 1:36 am

STL

YOW

11h 23m

2 stops

$410Air Canada

Wed, Jun 3 - Sat, Jun 6

6:51 pm - 11:59 pm

YUL

STL

6h 08m

1 stop

5:20 pm - 11:57 pm

STL

YUL

5h 37m

1 stop

$457Delta

Fri, May 29 - Mon, Jun 1

6:51 pm - 11:59 pm

YUL

STL

6h 08m

1 stop

5:20 pm - 11:57 pm

STL

YUL

5h 37m

1 stop

$458Delta

Fri, May 29 - Mon, Jun 1

6:25 am - 10:29 am

YOW

MCI

5h 04m

1 stop

6:00 am - 9:35 pm

MCI

YOW

14h 35m

1 stop

$476Lufthansa

Sat, May 30 - Fri, Jun 5

Air Canada flights from Region of Ontario to Missouri

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

Air Canada

Oct 1

YOW10:00 amOttawa

5h 00m

1 stop

STL2:00 pmLambert-St Louis

Oct 6

STL8:55 amLambert-St Louis

5h 15m

1 stop

YOW3:10 pmOttawa

$407

Air Canada

Jun 3

YOW2:40 pmOttawa

6h 45m

1 stop

STL8:25 pmLambert-St Louis

Jun 6

STL1:13 pmLambert-St Louis

11h 23m

2 stops

YOW1:36 amOttawa

$410

Air Canada

Jun 3

YOW9:55 amOttawa

6h 51m

2 stops

STL3:46 pmLambert-St Louis

Jun 6

STL1:13 pmLambert-St Louis

11h 23m

2 stops

YOW1:36 amOttawa

$413

American Airlines flights from Region of Ontario to Missouri

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

American Airlines

Jun 10

YYZ7:25 amToronto Pearson Intl

7h 37m

1 stop

STL2:02 pmLambert-St Louis

Jun 24

STL1:42 pmLambert-St Louis

8h 47m

1 stop

YYZ11:29 pmToronto Pearson Intl

$350

American Airlines

Jun 2

YYZ1:15 pmToronto Pearson Intl

8h 15m

1 stop

STL8:30 pmLambert-St Louis

Jun 3

STL7:05 amLambert-St Louis

9h 39m

1 stop

YYZ5:44 pmToronto Pearson Intl

$372

American Airlines

Jun 9

YYZ7:25 amToronto Pearson Intl

7h 37m

1 stop

STL2:02 pmLambert-St Louis

Jun 10

STL7:03 amLambert-St Louis

9h 41m

1 stop

YYZ5:44 pmToronto Pearson Intl

$380

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 6/3

5:25 pm-11:29 pm

1 stop7h 04m

Lambert-St Louis

Sat 6/6

12:55 pm-6:48 pm

1 stop4h 53m

$351

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 9/16

6:00 am-3:38 pm

2 stops10h 38m

Lambert-St Louis

Sat 9/19

1:18 pm-9:35 pm

1 stop7h 17m

$372

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/2

1:15 pm-8:30 pm

1 stop8h 15m

Lambert-St Louis

Wed 6/3

7:05 am-5:44 pm

1 stop9h 39m

$372

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/9

7:25 am-2:02 pm

1 stop7h 37m

Lambert-St Louis

Wed 6/10

7:03 am-5:44 pm

1 stop9h 41m

$380

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 6/3

6:00 am-9:30 pm

2 stops16h 30m

Lambert-St Louis

Sat 6/6

12:55 pm-6:48 pm

1 stop4h 53m

$395

Quickest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 10/1

10:00 am-2:00 pm

1 stop5h 00m

Lambert-St Louis

Tue 10/6

8:55 am-3:10 pm

1 stop5h 15m

$407

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 6/3

2:40 pm-8:25 pm

1 stop6h 45m

Lambert-St Louis

Sat 6/6

1:13 pm-1:36 am

2 stops11h 23m

$410

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 5/29

6:51 pm-11:59 pm

1 stop6h 08m

Lambert-St Louis

Mon 6/1

5:20 pm-11:57 pm

1 stop5h 37m

$457

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 5/29

6:51 pm-11:59 pm

1 stop6h 08m

Lambert-St Louis

Mon 6/1

5:20 pm-11:57 pm

1 stop5h 37m

$458

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Sat 5/30

6:25 am-10:29 am

1 stop5h 04m

Kansas City

Fri 6/5

6:00 am-9:35 pm

1 stop14h 35m

$476

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 Region of Ontario to Missouri

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 Missouri?

In general, December is the cheapest month to fly from Region of Ontario to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $168. If you aren’t able to travel to Missouri during the month of December, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $175.

What is the cheapest day to depart on your flight to Missouri?

The cheapest day to depart from Region of Ontario to Missouri is on a Sunday when prices can be found for as low as $394. Flights from Region of Ontario to Missouri on a Wednesday will generally be more expensive and average around $496. 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 Missouri?

According to our data, the cheapest time of day to fly to Missouri is in the morning. momondo users have found flights departing from Region of Ontario to Missouri in the morning for as low as $349. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly at noon, with an average ticket price of $408. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ontario to Missouri flight route?

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

How far in advance should I book a flight from Ontario to Missouri?

You are more likely to see cheaper flights to Missouri from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $496 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Region of Ontario for as low as $359 on momondo.

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

You could potentially save up to 35% on your flight if you consider stops on a Region of Ontario to Missouri flight.

Cheap Region of Ontario to Missouri flight deals and tips

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

Best Price Found	$404
Fastest flight time	2h 06m
Direct flights	Every day
Airports in Missouri	55 airports

The best flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is $404

The fastest flight from Region of Ontario to Missouri takes 2h 06m

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

There are 55 airports in Missouri. From Region of Ontario there are direct flights to Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Ontario to Missouri

When did momondo last update prices for flights from Ontario to Missouri?
Prices for flights from Ontario to Missouri were last updated today.
How many operators does momondo search for flights from Ontario to Missouri?
The number of operators available for flights from Ontario to Missouri is 4 as of May 2026.
How old do you have to be to fly from Ontario to Missouri?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Missouri.
What documentation or ID do you need to fly to Missouri?
The required travel and health documents for your Missouri 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 Missouri. 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 Region of Ontario to Missouri?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to Missouri is Embraer 175, representing 41.67% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 900 at 25.00%, Airbus A220-300 at 19.17%, and Airbus A319 at 5.00%.

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $256	Free Cancellation	Rating 7.1 11,017 reviews	Search Air Canada flights
United Airlines	PriceFrom $428	Free Cancellation	Rating 7.4 9,701 reviews	Search United Airlines flights
Delta	PriceFrom $443	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
WestJet	PriceFrom $530	Free Cancellation	Rating 7.2 3,332 reviews	Search WestJet flights

Why use momondo?

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

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

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

Yes. momondo enables you to select and highlight flights to Missouri from Ontario with this policy.

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

momondo helps you find the best flight between Ontario and Missouri by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Missouri, momondo offers a useful price alert feature which will track prices for flights to Missouri from Ontario and alert you when they change.

An easier way to manage your Missouri trip

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Popular cities in Missouri

Flights to New Yorkfrom $77

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Flights to Chicagofrom $59

Flights to San Franciscofrom $58

Flights to Las Vegasfrom $48

Flights to Washington, D.C.from $57

Flights to Bostonfrom $83

Flights to Atlantafrom $50

Flights to Fort Lauderdalefrom $56

Flights to Dallasfrom $50

Cheap flights from Ontario to Missouri from $184

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 6/2. 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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Air Canada flights from Region of Ontario to Missouri

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American Airlines flights from Region of Ontario to Missouri

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

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

What is the cheapest month to fly to Missouri?

What is the cheapest day to depart on your flight to Missouri?

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

What is the cheapest Ontario to Missouri flight route?

How far in advance should I book a flight from Ontario to Missouri?

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

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

What airlines fly to Missouri?

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

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

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

Cheap Region of Ontario to Missouri flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Missouri

Frequently asked questions about flying from Ontario to Missouri

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo

Why use momondo?

An easier way to manage your Missouri 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 Missouri

Popular cities in Missouri

Popular flights according to clicks in the last 7 days on momondo

Region of Ontario flight routes

According to popular flight searches on momondo this year

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