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

As of September 2025, 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 14% of flights taking off on this day.

What airlines fly to Missouri?

Air Canada, United Airlines and American Airlines 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.

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

As of September 2025, there are 6 flights per day flying from Region of Ontario to Missouri. The most common time of day flights depart is 2:00PM, with 50% of flights taking off in the afternoon.

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

American Airlines and Air Canada 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 03m on average. If you fly from Ottawa (another popular airport in Region of Ontario) to St. Louis, then the average flight time is 7h 50m.

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 September 2025.

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.

$157 Cheap Flights from Ontario to Missouri in 2025/26

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Find the cheapest flights from Ontario to Missouri

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:35 pm - 10:02 amYYZ-STL

21h 27m1 stop

10:57 am - 2:05 pmSTL-YYZ

26h 08m1 stop

$266Multiple Airlines

Find Deal

Sat, Oct 18 - Thu, Oct 23

9:45 am - 1:57 pmYYZ-STL

29h 12m1 stop

6:22 pm - 2:40 pmSTL-YYZ

43h 18m2 stops

$287Multiple Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

10:57 am - 11:05 pmYYZ-MCI

13h 08m1 stop

5:53 am - 4:35 pmMCI-YYZ

9h 42m1 stop

$347American Airlines

Find Deal

Wed, Nov 5 - Mon, Nov 10

12:30 pm - 10:08 pmYUL-STL

10h 38m1 stop

7:58 pm - 3:11 pmSTL-YUL

18h 13m1 stop

$363American Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

2:15 pm - 3:18 pmYYZ-STL

2h 03mnonstop

4:05 pm - 7:06 pmSTL-YYZ

2h 01mnonstop

$383Air Canada

Find Deal

Sat, Oct 25 - Sun, Nov 2

2:15 pm - 3:18 pmYYZ-STL

2h 03mnonstop

4:05 pm - 7:00 pmSTL-YYZ

1h 55mnonstop

$401Air Canada

Find Deal

Wed, Oct 15 - Wed, Oct 22

12:25 pm - 4:07 pmYYZ-STL

4h 42m1 stop

6:09 pm - 11:05 pmSTL-YYZ

3h 56m1 stop

$424Delta

Find Deal

Tue, Nov 25 - Sun, Nov 30

11:00 am - 2:27 pmYYZ-STL

4h 27m1 stop

5:28 pm - 11:58 pmSTL-YYZ

5h 30m1 stop

$427United Airlines

Find Deal

Sat, Oct 25 - Sat, Oct 25

6:00 am - 3:46 pmYUL-STL

10h 46m1 stop

6:43 pm - 12:46 pmSTL-YUL

17h 03m2 stops

$450United Airlines

Find Deal

Thu, Nov 6 - Sat, Nov 8

7:30 pm - 8:13 amYUL-STL

13h 43m1 stop

9:35 am - 6:40 pmSTL-YUL

8h 05m1 stop

$465Delta

Find Deal

Wed, Nov 5 - Wed, Nov 12

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 25

YYZ2:15 pmToronto Pearson Intl

2h 03m

STL3:18 pmLambert-St Louis

Nov 2

STL4:05 pmLambert-St Louis

2h 01m

YYZ7:06 pmToronto Pearson Intl

$383

Find similar

Air Canada

Oct 15

YYZ2:15 pmToronto Pearson Intl

2h 03m

STL3:18 pmLambert-St Louis

Oct 22

STL4:05 pmLambert-St Louis

1h 55m

YYZ7:00 pmToronto Pearson Intl

$401

Find similar

Air Canada

Oct 4

YYZ3:00 pmToronto Pearson Intl

5h 57m

1 stop

STL7:57 pmLambert-St Louis

Oct 12

STL4:05 pmLambert-St Louis

1h 55m

YYZ7:00 pmToronto Pearson Intl

$403

Find similar

American Airlines flights from Region of Ontario to Missouri

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

American Airlines

Nov 5

YYZ10:57 amToronto Pearson Intl

13h 08m

1 stop

MCI11:05 pmKansas City

Nov 10

MCI5:53 amKansas City

9h 42m

1 stop

YYZ4:35 pmToronto Pearson Intl

$347

Find similar

American Airlines

Nov 1

YUL12:30 pmMontreal Pierre Elliott Trudeau Intl

10h 38m

1 stop

STL10:08 pmLambert-St Louis

Nov 8

STL7:58 pmLambert-St Louis

18h 13m

1 stop

YUL3:11 pmMontreal Pierre Elliott Trudeau Intl

$363

Find similar

American Airlines

Nov 1

YUL7:50 amMontreal Pierre Elliott Trudeau Intl

11h 21m

2 stops

STL6:11 pmLambert-St Louis

Nov 8

STL4:42 pmLambert-St Louis

21h 29m

1 stop

YUL3:11 pmMontreal Pierre Elliott Trudeau Intl

$372

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/18

1:35 pm-10:02 am

1 stop21h 27m

Lambert-St Louis

Thu 10/23

10:57 am-2:05 pm

1 stop26h 08m

$266

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 10/30

9:45 am-1:57 pm

1 stop29h 12m

Lambert-St Louis

Thu 11/6

6:22 pm-2:40 pm

2 stops43h 18m

$287

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Wed 11/5

10:57 am-11:05 pm

1 stop13h 08m

Kansas City

Mon 11/10

5:53 am-4:35 pm

1 stop9h 42m

$347

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 11/1

12:30 pm-10:08 pm

1 stop10h 38m

Lambert-St Louis

Sat 11/8

7:58 pm-3:11 pm

1 stop18h 13m

$363

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/25

2:15 pm-3:18 pm

Nonstop2h 03m

Lambert-St Louis

Sun 11/2

4:05 pm-7:06 pm

Nonstop2h 01m

$383

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 10/15

2:15 pm-3:18 pm

Nonstop2h 03m

Lambert-St Louis

Wed 10/22

4:05 pm-7:00 pm

Nonstop1h 55m

$401

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 11/25

12:25 pm-4:07 pm

1 stop4h 42m

Lambert-St Louis

Sun 11/30

6:09 pm-11:05 pm

1 stop3h 56m

$424

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/25

11:00 am-2:27 pm

1 stop4h 27m

Lambert-St Louis

Sat 10/25

5:28 pm-11:58 pm

1 stop5h 30m

$427

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 11/6

6:00 am-3:46 pm

1 stop10h 46m

Lambert-St Louis

Sat 11/8

6:43 pm-12:46 pm

2 stops17h 03m

$450

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 11/5

7:30 pm-8:13 am

1 stop13h 43m

Lambert-St Louis

Wed 11/12

9:35 am-6:40 pm

1 stop8h 05m

$465

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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, June 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 $372. If you aren’t able to travel to Missouri during the month of June, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $397.

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 Saturday when prices can be found for as low as $405. Flights from Region of Ontario to Missouri on a Sunday will generally be more expensive and average around $541. 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 $326. 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 $480. 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 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 $493 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 $360 on momondo.

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

There are 3 cabin classes available to choose from on Ontario to Missouri 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 Region of Ontario to Missouri flights?

You could potentially save up to 1% 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	$283
Fastest flight time	2h 03m
Direct flights	Every day
Airports in Missouri	1 airport

The best one-way flight to Missouri from Region of Ontario in the past 72 hours is $283. The best round-trip flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is $405.

The fastest flight from Region of Ontario to Missouri takes 2h 03m

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

There is 1 airport near Missouri: Lambert-St Louis (STL)

Search flight deals

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 September 2025.
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 Canadair (Bombardier) Regional Jet 900, representing 75.88% of all bookings. The subsequent popular models are Airbus A220-300 at 7.65%, Embraer 175 at 7.06%, and Airbus A319 at 3.53%.

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 $324	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Delta	PriceFrom $400	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
American Airlines	PriceFrom $421	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $449	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines 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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Cheap flights from Ontario to Missouri from $157

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 10/30. 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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Big names and deals

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Filter for what you want

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Find the cheapest flights from Ontario to Missouri

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Air Canada flights from Region of Ontario to Missouri

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

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

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 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?

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 to Missouri?

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

There are 3 cabin classes available to choose from on Ontario to Missouri 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 Region of Ontario to Missouri flights?

You could potentially save up to 1% on your flight if you consider stops on a Region of Ontario to Missouri flight.

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

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

What airlines fly to Missouri?

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

As of September 2025, there are 6 flights per day flying from Region of Ontario to Missouri. The most common time of day flights depart is 2:00PM, with 50% of flights taking off in the afternoon.

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

As of September 2025, 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 14% of flights taking off on this day.

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

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

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

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

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

What is the most popular plane model from Region of 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?

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

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

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

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

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