What airlines fly to Ontario?

Spirit Airlines, Delta and Southwest are the top three most popular airlines that fly to Ontario from Kansas City according to our data. Spirit Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Kansas City to Ontario?

Frontier and Alaska Airlines are the most popular carriers operating from Kansas City to Ontario

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

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

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

There are 4 operators available for flights from Kansas City Airport to Ontario Airport as of February 2026.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Kansas City Airport to Ontario Airport.

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

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$59 Cheap Flights from Kansas City to Ontario in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Kansas City to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:33 pm - 11:59 pm

MCI

ONT

5h 26m

1 stop

6:00 am - 7:46 pm

ONT

MCI

11h 46m

1 stop

$148Frontier

Mon, Feb 23 - Sat, Feb 28

8:36 pm - 11:59 pm

MCI

ONT

5h 23m

1 stop

6:00 am - 7:46 pm

ONT

MCI

11h 46m

1 stop

$169Frontier

Sat, Feb 21 - Sat, Feb 28

8:33 pm - 11:59 pm

MCI

ONT

5h 26m

1 stop

6:15 am - 7:53 pm

ONT

MCI

11h 38m

1 stop

$183Frontier

Mon, Mar 2 - Mon, Mar 9

4:39 pm - 9:34 pm

MCI

ONT

6h 55m

1 stop

6:00 am - 7:48 pm

ONT

MCI

11h 48m

1 stop

$194Frontier

Wed, Feb 25 - Fri, Feb 27

6:13 pm - 11:59 pm

MCI

ONT

7h 46m

1 stop

6:00 am - 7:46 pm

ONT

MCI

11h 46m

1 stop

$204Frontier

Fri, Feb 20 - Sat, Feb 28

8:33 pm - 9:34 pm

MCI

ONT

27h 01m

1 stop

9:40 pm - 11:33 pm

ONT

MCI

23h 53m

1 stop

$209Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

8:36 pm - 11:59 pm

MCI

ONT

5h 23m

1 stop

6:10 am - 7:48 pm

ONT

MCI

11h 38m

1 stop

$211Frontier

Sat, Feb 21 - Mon, Feb 23

1:44 pm - 11:59 pm

MCI

ONT

12h 15m

1 stop

6:00 am - 7:46 pm

ONT

MCI

11h 46m

1 stop

$214Frontier

Sun, Feb 22 - Sat, Feb 28

8:28 pm - 11:59 pm

MCI

ONT

5h 31m

1 stop

6:00 am - 7:46 pm

ONT

MCI

11h 46m

1 stop

$215Frontier

Thu, Feb 19 - Sat, Feb 21

2:51 pm - 11:55 pm

MCI

ONT

11h 04m

1 stop

12:59 am - 10:18 am

ONT

MCI

31h 19m

2 stops

$219Frontier

Sat, Apr 18 - Tue, Apr 21

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets

Frontier

Feb 23

MCI8:33 pmKansas City

5h 26m

1 stop

ONT11:59 pmOntario

Feb 28

ONT6:00 amOntario

11h 46m

1 stop

MCI7:46 pmKansas City

$148

Frontier

Feb 21

MCI8:36 pmKansas City

5h 23m

1 stop

ONT11:59 pmOntario

Feb 28

ONT6:00 amOntario

11h 46m

1 stop

MCI7:46 pmKansas City

$169

Frontier

Mar 2

MCI8:33 pmKansas City

5h 26m

1 stop

ONT11:59 pmOntario

Mar 9

ONT6:15 amOntario

11h 38m

1 stop

MCI7:53 pmKansas City

$183

United Airlines flights from Kansas City to Ontario

Our best United Airlines deals on Kansas City to Ontario flight tickets

United Airlines

Apr 18

MCI6:15 amKansas City

8h 23m

2 stops

ONT12:38 pmOntario

Apr 22

ONT11:05 amOntario

10h 27m

2 stops

MCI11:32 pmKansas City

$284

United Airlines

Feb 17

MCI4:03 pmKansas City

7h 57m

1 stop

ONT10:00 pmOntario

Feb 28

ONT6:00 amOntario

6h 02m

1 stop

MCI2:02 pmKansas City

$482

United Airlines

Feb 16

MCI11:32 amKansas City

13h 25m

2 stops

ONT10:57 pmOntario

Feb 25

ONT6:37 pmOntario

13h 59m

2 stops

MCI10:36 amKansas City

$528

Fly from

Fly to

Route

Depart

Return

Price

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/23

8:33 pm-11:59 pm

1 stop5h 26m

Ontario

Sat 2/28

6:00 am-7:46 pm

1 stop11h 46m

$148

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 2/21

8:36 pm-11:59 pm

1 stop5h 23m

Ontario

Sat 2/28

6:00 am-7:46 pm

1 stop11h 46m

$169

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 3/2

8:33 pm-11:59 pm

1 stop5h 26m

Ontario

Mon 3/9

6:15 am-7:53 pm

1 stop11h 38m

$183

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 2/25

4:39 pm-9:34 pm

1 stop6h 55m

Ontario

Fri 2/27

6:00 am-7:48 pm

1 stop11h 48m

$194

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 2/20

6:13 pm-11:59 pm

1 stop7h 46m

Ontario

Sat 2/28

6:00 am-7:46 pm

1 stop11h 46m

$204

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 3/2

8:33 pm-9:34 pm

1 stop27h 01m

Ontario

Mon 3/9

9:40 pm-11:33 pm

1 stop23h 53m

$209

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 2/21

8:36 pm-11:59 pm

1 stop5h 23m

Ontario

Mon 2/23

6:10 am-7:48 pm

1 stop11h 38m

$211

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sun 2/22

1:44 pm-11:59 pm

1 stop12h 15m

Ontario

Sat 2/28

6:00 am-7:46 pm

1 stop11h 46m

$214

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 2/19

8:28 pm-11:59 pm

1 stop5h 31m

Ontario

Sat 2/21

6:00 am-7:46 pm

1 stop11h 46m

$215

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 4/18

2:51 pm-11:55 pm

1 stop11h 04m

Ontario

Tue 4/21

12:59 am-10:18 am

2 stops31h 19m

$219

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 Kansas City 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

What is the cheapest month to fly to Ontario?

In general, October is the cheapest month to fly from Kansas City to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $306. If you aren’t able to travel during the month of October, then book flights to Ontario from Kansas City during September instead. Flights to Ontario in September, while not as cheap as those in October, still average around $327.

How have Kansas City to Ontario flight prices changed over time?

As of February 2026, prices for Kansas City to Ontario flights are approximately 12% cheaper when compared to flights at the same time last year.

When to book flights from Kansas City to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Kansas City to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Kansas City to Ontario (MCI to ONT) flight deals and tips

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

Fastest flight time	5h 07m
Direct flights	None

The fastest flight from Kansas City to Ontario takes 5h 07m

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

Search flight deals

How far is Kansas City to Ontario by plane?
Kansas City and Ontario are 1321.7 mi apart from one another. In terms of flight time, this usually takes a little over 5h 07m.
When did momondo last update prices for flights from Kansas City Airport to Ontario Airport?
Prices for flights from Kansas City Airport to Ontario Airport were last updated today.
How many operators does momondo search for flights from Kansas City Airport to Ontario Airport?
There are 4 operators available for flights from Kansas City Airport to Ontario Airport as of February 2026.
How old do you have to be to fly from Kansas City Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Kansas City Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Kansas City to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Kansas City to Ontario is Southwest (48% of total bookings). The next most popular airlines are American Airlines (29%), Frontier (15%), and United Airlines (8%).

Best airlines flying from Kansas City to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $75	Free Cancellation	Rating 5.7 3,051 reviews	Search Frontier flights
United Airlines	PriceFrom $253	Free Cancellation	Rating 7.4 9,231 reviews	Search United Airlines flights
American Airlines	PriceFrom $284	Free Cancellation	Rating 7.2 11,212 reviews	Search American Airlines flights
Southwest	PriceFrom $289	Free Cancellation	Rating 8.0 4,271 reviews	Search Southwest flights

Why use momondo?

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

It is quick and easy to find Kansas City to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Yes. All flights to Ontario from Kansas City on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Kansas City to Ontario?

Once you have performed a search for Kansas City 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 Kansas City to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Kansas City to Ontario 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.