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

As of March 2026, there are 1 flights per day flying from Region of Ontario to Missouri. The most common time of day flights depart is 2:00PM, with 100% of flights taking off in the afternoon.

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

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

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 45% 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 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 4h 48m.

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

As of March 2026, there are 8 flights per week flying from Region of Ontario to Missouri. The most common day of the week flights depart is Wed, with 25% of flights taking off on this day.

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 March 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.

6:25 am - 3:46 pm

YOW

STL

10h 21m

1 stop

6:00 am - 1:59 pm

STL

YOW

6h 59m

1 stop

$304United Airlines

lun., may. 25 - vie., may. 29

5:25 pm - 9:13 pm

YOW

STL

4h 48m

1 stop

6:30 am - 5:07 pm

STL

YOW

9h 37m

1 stop

$307United Airlines

vie., may. 1 - mar., may. 5

3:00 pm - 8:25 pm

YOW

STL

6h 25m

1 stop

7:05 am - 1:05 pm

STL

YOW

5h 00m

1 stop

$327Air Canada

dom., may. 10 - dom., may. 17

8:20 pm - 7:51 am

YYZ

STL

12h 31m

1 stop

8:23 pm - 11:28 am

STL

YYZ

38h 05m

2 stops

$364Multiple Airlines

jue., abr. 9 - mié., abr. 15

12:25 pm - 11:13 pm

YOW

STL

11h 48m

2 stops

6:48 am - 5:35 pm

STL

YOW

9h 47m

2 stops

$376Delta

vie., may. 1 - mar., may. 5

12:25 pm - 11:13 pm

YOW

STL

11h 48m

2 stops

6:48 am - 5:35 pm

STL

YOW

9h 47m

2 stops

$377Delta

vie., may. 1 - mar., may. 5

7:20 am - 2:06 pm

YYZ

STL

7h 46m

1 stop

6:00 am - 2:30 pm

STL

YYZ

7h 30m

1 stop

$403American Airlines

mié., may. 27 - mié., jun. 10

11:39 am - 8:30 pm

YYZ

STL

9h 51m

1 stop

9:08 am - 5:44 pm

STL

YYZ

7h 36m

1 stop

$405American Airlines

mié., may. 27 - mié., jun. 10

7:30 pm - 12:24 pm

YOW

MCI

17h 54m

2 stops

6:15 am - 9:35 pm

MCI

YOW

14h 20m

1 stop

$411Air Canada

lun., abr. 20 - vie., abr. 24

8:20 pm - 7:51 am

YYZ

STL

12h 31m

1 stop

4:59 pm - 11:35 am

STL

YYZ

41h 36m

2 stops

$420Multiple Airlines

jue., abr. 9 - mar., abr. 14

United Airlines flights from Region of Ontario to Missouri

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

United Airlines

May 25

YOW6:25 amOttawa

10h 21m

1 stop

STL3:46 pmLambert-St Louis

May 29

STL6:00 amLambert-St Louis

6h 59m

1 stop

YOW1:59 pmOttawa

$304

United Airlines

May 1

YOW5:25 pmOttawa

6h 25m

1 stop

STL10:50 pmLambert-St Louis

May 5

STL11:15 amLambert-St Louis

11h 39m

2 stops

YOW11:54 pmOttawa

$307

United Airlines

May 1

YOW5:25 pmOttawa

6h 25m

1 stop

STL10:50 pmLambert-St Louis

May 5

STL6:30 amLambert-St Louis

14h 05m

1 stop

YOW9:35 pmOttawa

$308

American Airlines flights from Region of Ontario to Missouri

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

American Airlines

May 27

YYZ7:20 amToronto Pearson Intl

7h 46m

1 stop

STL2:06 pmLambert-St Louis

Jun 10

STL6:00 amLambert-St Louis

7h 30m

1 stop

YYZ2:30 pmToronto Pearson Intl

$403

American Airlines

May 27

YYZ11:39 amToronto Pearson Intl

9h 51m

1 stop

STL8:30 pmLambert-St Louis

Jun 10

STL9:08 amLambert-St Louis

7h 36m

1 stop

YYZ5:44 pmToronto Pearson Intl

$405

American Airlines

Apr 15

YYZ7:15 amToronto Pearson Intl

8h 57m

1 stop

STL3:12 pmLambert-St Louis

Apr 21

STL6:00 amLambert-St Louis

9h 45m

1 stop

YYZ4:45 pmToronto Pearson Intl

$424

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

lun. 5/25

6:25 am-3:46 pm

1 stop10h 21m

Lambert-St Louis

vie. 5/29

6:00 am-1:59 pm

1 stop6h 59m

$304

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

vie. 5/1

5:25 pm-9:13 pm

1 stop4h 48m

Lambert-St Louis

mar. 5/5

6:30 am-5:07 pm

1 stop9h 37m

$307

Quickest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

dom. 5/10

3:00 pm-8:25 pm

1 stop6h 25m

Lambert-St Louis

dom. 5/17

7:05 am-1:05 pm

1 stop5h 00m

$327

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 4/9

8:20 pm-7:51 am

1 stop12h 31m

Lambert-St Louis

mié. 4/15

8:23 pm-11:28 am

2 stops38h 05m

$364

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

vie. 5/1

12:25 pm-11:13 pm

2 stops11h 48m

Lambert-St Louis

mar. 5/5

6:48 am-5:35 pm

2 stops9h 47m

$376

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

vie. 5/1

12:25 pm-11:13 pm

2 stops11h 48m

Lambert-St Louis

mar. 5/5

6:48 am-5:35 pm

2 stops9h 47m

$377

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mié. 5/27

7:20 am-2:06 pm

1 stop7h 46m

Lambert-St Louis

mié. 6/10

6:00 am-2:30 pm

1 stop7h 30m

$403

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

mié. 5/27

11:39 am-8:30 pm

1 stop9h 51m

Lambert-St Louis

mié. 6/10

9:08 am-5:44 pm

1 stop7h 36m

$405

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

lun. 4/20

7:30 pm-12:24 pm

2 stops17h 54m

Kansas City

vie. 4/24

6:15 am-9:35 pm

1 stop14h 20m

$411

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

jue. 4/9

8:20 pm-7:51 am

1 stop12h 31m

Lambert-St Louis

mar. 4/14

4:59 pm-11:35 am

2 stops41h 36m

$420

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, 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 $359. If you aren’t able to travel to Missouri during the month of June, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $395.

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 $490. 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 $333. 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 $412. 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 $459 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 $356 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 28% 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	$291
Fastest flight time	2h 06m
Direct flights	Every day
Airports in Missouri	55 airports

The best one-way flight to Missouri from Region of Ontario in the past 72 hours is $291. The best round-trip flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is $283.

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

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 March 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 74.82% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet 900 at 7.19%, Airbus A220-300 at 6.47%, and Airbus A319 at 4.32%.

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 $323	Free Cancellation	Rating 7.1 10,842 reviews	Search Air Canada flights
United Airlines	PriceFrom $428	Free Cancellation	Rating 7.4 9,486 reviews	Search United Airlines flights
Delta	PriceFrom $443	Free Cancellation	Rating 7.9 8,333 reviews	Search Delta flights
WestJet	PriceFrom $524	Free Cancellation	Rating 7.2 3,303 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.

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Popular cities in Missouri

Flights to New Yorkfrom $66

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Flights to Chicagofrom $68

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Flights to Las Vegasfrom $41

Flights to Washington, D.C.from $59

Flights to Bostonfrom $65

Flights to Atlantafrom $53

Flights to Dallasfrom $62

Flights to Seattlefrom $104

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 5/6. 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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United Airlines 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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See travel insights to Missouri from

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 to Missouri?

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

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

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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