What airlines fly to Missouri?

Southwest, American Airlines and Delta are the top three most popular airlines that fly to Missouri from Ontario according to our data. Southwest is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 9 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

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

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

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

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

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

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

How old do you have to be to fly from Ontario Airport 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 Airport to Missouri.

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

The travel and health documents required for your trip to Missouri 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 Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$80 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

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:59 am - 7:21 pm

ONT

STL

16h 22m

1 stop

9:55 pm - 6:49 pm

STL

ONT

22h 54m

1 stop

$160Frontier

Wed, Apr 15 - Mon, Apr 20

12:59 am - 2:06 pm

ONT

MCI

11h 07m

1 stop

2:51 pm - 11:55 pm

MCI

ONT

11h 04m

1 stop

$160Frontier

Fri, Apr 17 - Sat, Apr 25

12:59 am - 7:21 pm

ONT

STL

16h 22m

1 stop

9:55 pm - 8:24 am

STL

ONT

12h 29m

1 stop

$162Frontier

Wed, Apr 15 - Thu, Apr 23

10:59 am - 7:13 pm

ONT

COU

6h 14m

1 stop

5:21 pm - 11:46 pm

COU

ONT

8h 25m

1 stop

$338American Airlines

Wed, Apr 15 - Sat, Apr 18

6:15 am - 7:13 pm

ONT

COU

10h 58m

2 stops

7:43 pm - 11:46 pm

COU

ONT

6h 03m

1 stop

$344American Airlines

Wed, Apr 15 - Sat, Apr 18

5:10 am - 12:49 pm

ONT

SGF

5h 39m

1 stop

2:52 pm - 9:50 pm

SGF

ONT

8h 58m

1 stop

$349United Airlines

Wed, Apr 15 - Sat, Apr 18

1:34 pm - 9:03 pm

ONT

COU

5h 29m

1 stop

9:02 am - 12:38 pm

COU

ONT

5h 36m

1 stop

$363United Airlines

Wed, Apr 22 - Sat, Apr 25

7:05 am - 6:13 pm

ONT

SGF

9h 08m

1 stop

6:00 am - 11:04 am

SGF

ONT

7h 04m

1 stop

$379Delta

Tue, Aug 4 - Tue, Aug 11

10:27 pm - 11:31 am

ONT

SGF

11h 04m

1 stop

12:21 pm - 8:07 pm

SGF

ONT

9h 46m

1 stop

$409Multiple Airlines

Thu, Apr 9 - Mon, Apr 13

9:20 pm - 11:31 am

ONT

SGF

12h 11m

1 stop

1:19 pm - 8:04 pm

SGF

ONT

32h 45m

2 stops

$446Multiple Airlines

Thu, Apr 30 - Sun, May 3

Frontier flights from Ontario to Missouri

Our best Frontier deals on Ontario to Missouri flight tickets

Frontier

Apr 15

ONT12:59 amOntario

16h 22m

1 stop

STL7:21 pmLambert-St Louis

Apr 20

STL9:55 pmLambert-St Louis

22h 54m

1 stop

ONT6:49 pmOntario

$160

Frontier

Apr 15

ONT12:59 amOntario

16h 22m

1 stop

STL7:21 pmLambert-St Louis

Apr 23

STL9:55 pmLambert-St Louis

12h 29m

1 stop

ONT8:24 amOntario

$162

Frontier

Apr 15

ONT12:59 amOntario

16h 22m

1 stop

STL7:21 pmLambert-St Louis

Apr 19

STL9:55 pmLambert-St Louis

14h 19m

1 stop

ONT10:14 amOntario

$171

Southwest flights from Ontario to Missouri

Our best Southwest deals on Ontario to Missouri flight tickets

Southwest

Apr 15

ONT11:55 pmOntario

7h 25m

1 stop

MCI9:20 amKansas City

Apr 21

MCI6:30 pmKansas City

5h 00m

1 stop

ONT9:30 pmOntario

$287

Southwest

Apr 22

ONT11:55 pmOntario

7h 25m

1 stop

MCI9:20 amKansas City

Apr 28

MCI8:45 amKansas City

9h 05m

2 stops

ONT3:50 pmOntario

$293

Southwest

Apr 7

ONT8:05 amOntario

7h 50m

2 stops

STL5:55 pmLambert-St Louis

Apr 17

STL6:20 amLambert-St Louis

7h 50m

2 stops

ONT12:10 pmOntario

$566

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Wed 4/15

12:59 am-7:21 pm

1 stop16h 22m

Lambert-St Louis

Mon 4/20

9:55 pm-6:49 pm

1 stop22h 54m

$160

OntarioKansas City

ONT - MCI

ONTMCI

Ontario

Fri 4/17

12:59 am-2:06 pm

1 stop11h 07m

Kansas City

Sat 4/25

2:51 pm-11:55 pm

1 stop11h 04m

$160

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Wed 4/15

12:59 am-7:21 pm

1 stop16h 22m

Lambert-St Louis

Thu 4/23

9:55 pm-8:24 am

1 stop12h 29m

$162

OntarioColumbia

ONT - COU

ONTCOU

Ontario

Wed 4/15

10:59 am-7:13 pm

1 stop6h 14m

Columbia Regional

Sat 4/18

5:21 pm-11:46 pm

1 stop8h 25m

$338

OntarioColumbia

ONT - COU

ONTCOU

Ontario

Wed 4/15

6:15 am-7:13 pm

2 stops10h 58m

Columbia Regional

Sat 4/18

7:43 pm-11:46 pm

1 stop6h 03m

$344

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Wed 4/15

5:10 am-12:49 pm

1 stop5h 39m

Springfield-Branson

Sat 4/18

2:52 pm-9:50 pm

1 stop8h 58m

$349

Quickest round-trip

OntarioColumbia

ONT - COU

ONTCOU

Ontario

Wed 4/22

1:34 pm-9:03 pm

1 stop5h 29m

Columbia Regional

Sat 4/25

9:02 am-12:38 pm

1 stop5h 36m

$363

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Tue 8/4

7:05 am-6:13 pm

1 stop9h 08m

Springfield-Branson

Tue 8/11

6:00 am-11:04 am

1 stop7h 04m

$379

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Thu 4/9

10:27 pm-11:31 am

1 stop11h 04m

Springfield-Branson

Mon 4/13

12:21 pm-8:07 pm

1 stop9h 46m

$409

OntarioSpringfield

ONT - SGF

ONTSGF

Ontario

Thu 4/30

9:20 pm-11:31 am

1 stop12h 11m

Springfield-Branson

Sun 5/3

1:19 pm-8:04 pm

2 stops32h 45m

$446

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 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

What is the cheapest month to fly to Missouri?

In general, September is the cheapest month to fly from Ontario to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $241. If you aren’t able to travel to Missouri during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $292.

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

You are more likely to see cheaper flights to Missouri from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $345 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Ontario for as low as $240 on momondo.

Cheap Ontario to Missouri flight deals and tips

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

Fastest flight time	5h 00m
Direct flights	None

The fastest flight from Ontario to Missouri takes 5h 00m

There are no direct flights from Ontario to Missouri. There are no popular flight routes from Ontario to Missouri.

Search flight deals

When did momondo last update prices for flights from Ontario Airport to Missouri?
Prices for flights from Ontario Airport to Missouri were last updated today.
How many operators does momondo search for flights from Ontario Airport to Missouri?
As of March 2026, there are 5 operators available to choose from for flights from Ontario Airport to Missouri.
How old do you have to be to fly from Ontario Airport 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 Airport to Missouri.
What documentation or ID do you need to fly to Missouri?
The travel and health documents required for your trip to Missouri 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 Missouri. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Missouri

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 8,320 reviews	Search Delta flights
Frontier	PriceFrom $115	Free Cancellation	Rating 5.7 3,018 reviews	Search Frontier flights
United Airlines	PriceFrom $236	Free Cancellation	Rating 7.4 9,469 reviews	Search United Airlines flights
Southwest	PriceFrom $247	Free Cancellation	Rating 8.0 4,331 reviews	Search Southwest flights
American Airlines	PriceFrom $268	Free Cancellation	Rating 7.1 11,491 reviews	Search American Airlines flights

Why use momondo?

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

Finding the right flight to Missouri from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Missouri quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Missouri from Ontario which offer a flexible booking policy as well as other useful filters and features.

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

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 Ontario to Missouri.

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

Yes. momondo can track prices for Ontario to Missouri flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.