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

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

How long does it take to fly to Ontario?

Average flight duration from Missouri to Ontario depends on which airport you fly into and out of. Flying from Kansas City to Los Angeles is 3h 20m on average, while flying from St. Louis to Los Angeles is 3h 50m on average. Los Angeles is the most popular airport in Ontario.

What airlines fly to Ontario?

Southwest, American Airlines and Delta are the top three most popular airlines that fly to Ontario from Missouri 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 Ontario. Keep in mind that there are 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

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

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

There are 5 operators available for flights from Missouri to Ontario Airport as of April 2026.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Missouri to Ontario Airport.

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

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

$85 Cheap Flights from Missouri to Ontario in 2026

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Find the cheapest flights from Missouri to Los Angeles

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:18 pm - 3:09 pm

STL

ONT

19h 51m

1 stop

3:30 pm - 6:06 pm

ONT

STL

24h 36m

1 stop

$160Frontier

fr., mai 15 - ma., mai 25

9:18 pm - 3:44 pm

STL

ONT

20h 26m

1 stop

8:27 pm - 11:41 am

ONT

STL

13h 14m

1 stop

$162Frontier

ma., mai 11 - lø., mai 16

2:34 pm - 10:05 am

MCI

ONT

21h 31m

1 stop

10:50 am - 1:49 pm

ONT

MCI

24h 59m

1 stop

$164Frontier

ti., mai 12 - ti., jun. 2

8:08 pm - 11:49 pm

STL

ONT

5h 41m

1 stop

6:00 am - 7:23 pm

ONT

STL

11h 23m

1 stop

$167Frontier

lø., mai 9 - lø., mai 16

6:43 pm - 11:59 pm

SGF

ONT

7h 16m

1 stop

11:59 pm - 10:30 am

ONT

SGF

8h 31m

1 stop

$342American Airlines

fr., mai 29 - lø., mai 30

6:43 pm - 11:59 pm

SGF

ONT

7h 16m

1 stop

11:59 pm - 10:30 am

ONT

SGF

8h 31m

1 stop

$362American Airlines

fr., mai 29 - lø., mai 30

7:54 pm - 11:46 pm

SGF

ONT

5h 52m

1 stop

11:59 pm - 10:30 am

ONT

SGF

8h 31m

1 stop

$367American Airlines

ma., mai 4 - ti., jun. 9

3:00 pm - 9:58 pm

SGF

ONT

8h 58m

1 stop

6:00 am - 4:26 pm

ONT

SGF

8h 26m

2 stops

$404United Airlines

ma., mai 4 - lø., mai 9

3:25 pm - 10:51 pm

COU

ONT

9h 26m

1 stop

1:18 pm - 8:39 pm

ONT

COU

5h 21m

1 stop

$428United Airlines

lø., mai 30 - ti., jun. 2

3:10 pm - 10:35 pm

COU

ONT

9h 25m

1 stop

6:59 pm - 10:57 am

ONT

COU

13h 58m

2 stops

$484United Airlines

ti., mai 5 - lø., mai 9

Frontier flights from Missouri to Ontario

Our best Frontier deals on Missouri to Ontario flight tickets

Frontier

May 15

STL9:18 pmLambert-St Louis

24h 14m

1 stop

ONT7:32 pmOntario

May 26

ONT1:39 pmOntario

26h 27m

1 stop

STL6:06 pmLambert-St Louis

$160

Frontier

May 11

STL9:18 pmLambert-St Louis

20h 26m

1 stop

ONT3:44 pmOntario

May 16

ONT8:27 pmOntario

13h 14m

1 stop

STL11:41 amLambert-St Louis

$162

Frontier

May 12

MCI2:34 pmKansas City

21h 31m

1 stop

ONT10:05 amOntario

Jun 2

ONT10:50 amOntario

24h 59m

1 stop

MCI1:49 pmKansas City

$164

United Airlines flights from Missouri to Ontario

Our best United Airlines deals on Missouri to Ontario flight tickets

United Airlines

May 4

SGF3:00 pmSpringfield-Branson

8h 58m

1 stop

ONT9:58 pmOntario

May 9

ONT6:00 amOntario

8h 26m

2 stops

SGF4:26 pmSpringfield-Branson

$404

United Airlines

May 30

COU3:25 pmColumbia Regional

9h 26m

1 stop

ONT10:51 pmOntario

Jun 2

ONT1:18 pmOntario

5h 21m

1 stop

COU8:39 pmColumbia Regional

$428

United Airlines

Apr 23

COU9:02 amColumbia Regional

5h 36m

1 stop

ONT12:38 pmOntario

Apr 30

ONT1:40 pmOntario

5h 09m

1 stop

COU8:49 pmColumbia Regional

$478

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

fr. 5/15

9:18 pm-3:09 pm

1 stop19h 51m

Ontario

ma. 5/25

3:30 pm-6:06 pm

1 stop24h 36m

$160

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

ma. 5/11

9:18 pm-3:44 pm

1 stop20h 26m

Ontario

lø. 5/16

8:27 pm-11:41 am

1 stop13h 14m

$162

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

ti. 5/12

2:34 pm-10:05 am

1 stop21h 31m

Ontario

ti. 6/2

10:50 am-1:49 pm

1 stop24h 59m

$164

St. LouisOntario

STL - ONT

STLONT

Lambert-St Louis

lø. 5/9

8:08 pm-11:49 pm

1 stop5h 41m

Ontario

lø. 5/16

6:00 am-7:23 pm

1 stop11h 23m

$167

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

fr. 5/29

6:43 pm-11:59 pm

1 stop7h 16m

Ontario

lø. 5/30

11:59 pm-10:30 am

1 stop8h 31m

$342

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

fr. 5/29

6:43 pm-11:59 pm

1 stop7h 16m

Ontario

lø. 5/30

11:59 pm-10:30 am

1 stop8h 31m

$362

Quickest round-trip

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

ma. 5/4

7:54 pm-11:46 pm

1 stop5h 52m

Ontario

ti. 6/9

11:59 pm-10:30 am

1 stop8h 31m

$367

SpringfieldOntario

SGF - ONT

SGFONT

Springfield-Branson

ma. 5/4

3:00 pm-9:58 pm

1 stop8h 58m

Ontario

lø. 5/9

6:00 am-4:26 pm

2 stops8h 26m

$404

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

lø. 5/30

3:25 pm-10:51 pm

1 stop9h 26m

Ontario

ti. 6/2

1:18 pm-8:39 pm

1 stop5h 21m

$428

ColumbiaOntario

COU - ONT

COUONT

Columbia Regional

ti. 5/5

3:10 pm-10:35 pm

1 stop9h 25m

Ontario

lø. 5/9

6:59 pm-10:57 am

2 stops13h 58m

$484

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 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 Ontario?

In general, November is the cheapest month to fly from Missouri to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $292. If you aren’t able to travel during the month of November, then book flights to Ontario from Missouri during August instead. Flights to Ontario in August, while not as cheap as those in November, still average around $300.

Can stopping save me money on Missouri to Ontario flights?

You could potentially save up to 77% on your flight if you consider stops on a Missouri to Ontario flight.

Cheap Missouri to Ontario flight deals and tips

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

Fastest flight time	5h 15m
Direct flights	None

The fastest flight from Missouri to Ontario takes 5h 15m

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

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Frequently asked questions about flying from Missouri to Ontario

When did momondo last update prices for flights from Missouri to Ontario Airport?
Prices for flights from Missouri to Ontario Airport were last updated today.
How many operators does momondo search for flights from Missouri to Ontario Airport?
There are 5 operators available for flights from Missouri to Ontario Airport as of April 2026.
How old do you have to be to fly from Missouri to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Missouri to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport 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 Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Missouri to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $72	Free Cancellation	Rating 5.6 2,981 reviews	Search Frontier flights
American Airlines	PriceFrom $264	Free Cancellation	Rating 7.1 11,645 reviews	Search American Airlines flights
Delta	PriceFrom $276	Free Cancellation	Rating 7.9 8,434 reviews	Search Delta flights
United Airlines	PriceFrom $284	Free Cancellation	Rating 7.4 9,613 reviews	Search United Airlines flights
Southwest	PriceFrom $289	Free Cancellation	Rating 8.0 4,331 reviews	Search Southwest flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Missouri to Ontario for you.

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

All flight searches from Missouri to Ontario on momondo can be filtered to show those which offer flexible booking policies.

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 Ontario trip

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Cheap flights from Missouri to Los Angeles from $85

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 Los Angeles departing on 5/10. 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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How to get the cheapest flight ticket from Missouri to Ontario

What is the cheapest month to fly to Ontario?

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

What airlines fly to Ontario?

How long does it take to fly to Ontario?

Cheap Missouri to Ontario flight deals and tips

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

Fastest flight time

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Frequently asked questions about flying from Missouri to Ontario

Best airlines flying from Missouri to Ontario

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

Why use momondo?

An easier way to manage your 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 the United States

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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