Which layover airport has the shortest connection time from Kansas City to Ontario?

Denver (DEN) has the shortest average layover time for this route: 1h 10m.

Which layover airport has the shortest travel time from Kansas City to Ontario?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 4h 55m.

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

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

Which airport is the most popular layover for flights between Kansas City and Ontario?

Salt Lake City (SLC) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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 41% 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.

Which layover airport offers the lowest fares from Kansas City to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $290.

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 November 2025.

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.

$65 Cheap Flights from Kansas City to Ontario in 2025/26

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8:46 pm - 11:59 pmMCI-ONT

5h 13m1 stop

6:00 am - 7:51 pmONT-MCI

11h 51m1 stop

$134Frontier

Find Deal

Thu, Jan 8 - Fri, Jan 9

6:49 pm - 11:11 amMCI-ONT

18h 22m1 stop

12:58 am - 7:34 pmONT-MCI

16h 36m1 stop

$135Frontier

Find Deal

Wed, Nov 19 - Mon, Nov 24

6:49 pm - 11:11 amMCI-ONT

18h 22m1 stop

12:58 am - 7:33 pmONT-MCI

16h 35m1 stop

$137Frontier

Find Deal

Wed, Nov 19 - Sat, Nov 22

8:46 pm - 11:59 pmMCI-ONT

5h 13m1 stop

6:00 am - 7:51 pmONT-MCI

11h 51m1 stop

$138Frontier

Find Deal

Thu, Jan 8 - Mon, Jan 12

8:09 pm - 2:25 pmMCI-ONT

20h 16m1 stop

3:20 pm - 7:50 pmONT-MCI

26h 30m1 stop

$139Frontier

Find Deal

Thu, Dec 4 - Sat, Dec 6

8:28 pm - 11:57 pmMCI-ONT

5h 29m1 stop

12:58 am - 7:34 pmONT-MCI

16h 36m1 stop

$141Frontier

Find Deal

Fri, Nov 21 - Mon, Nov 24

7:00 am - 5:09 pmMCI-ONT

12h 09m1 stop

6:00 am - 10:11 amONT-MCI

26h 11m2 stops

$241Multiple Airlines

Find Deal

Fri, Dec 19 - Sun, Jan 11

11:20 am - 11:57 pmMCI-ONT

14h 37m2 stops

5:06 pm - 8:03 pmONT-MCI

24h 57m1 stop

$271Multiple Airlines

Find Deal

Wed, Nov 26 - Mon, Dec 1

2:45 pm - 10:59 amMCI-ONT

22h 14m1 stop

11:53 am - 1:50 pmONT-MCI

23h 57m1 stop

$306Alaska Airlines

Find Deal

Wed, Jan 7 - Wed, Jan 14

7:00 am - 1:56 pmMCI-ONT

8h 56m1 stop

7:30 am - 11:23 pmONT-MCI

13h 53m1 stop

$307Delta

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Sat, Jan 10 - Wed, Jan 14

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets

Frontier

Jan 8

MCI8:46 pmKansas City

5h 13m

1 stop

ONT11:59 pmOntario

Jan 9

ONT6:00 amOntario

11h 51m

1 stop

MCI7:51 pmKansas City

$134

Find similar

Frontier

Nov 19

MCI6:49 pmKansas City

18h 22m

1 stop

ONT11:11 amOntario

Nov 24

ONT12:58 amOntario

16h 36m

1 stop

MCI7:34 pmKansas City

$135

Find similar

Frontier

Nov 19

MCI6:49 pmKansas City

18h 22m

1 stop

ONT11:11 amOntario

Nov 22

ONT12:58 amOntario

16h 35m

1 stop

MCI7:33 pmKansas City

$137

Find similar

United Airlines flights from Kansas City to Ontario

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

United Airlines

Nov 19

MCI11:36 amKansas City

13h 15m

2 stops

ONT10:51 pmOntario

Nov 24

ONT6:00 amOntario

12h 47m

2 stops

MCI8:47 pmKansas City

$527

Find similar

United Airlines

Nov 19

MCI6:00 amKansas City

8h 37m

2 stops

ONT12:37 pmOntario

Nov 23

ONT1:40 pmOntario

8h 02m

2 stops

MCI11:42 pmKansas City

$557

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Fly from

Fly to

Route

Depart

Return

Price

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/8

8:46 pm-11:59 pm

1 stop5h 13m

Ontario

Fri 1/9

6:00 am-7:51 pm

1 stop11h 51m

$134

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/19

6:49 pm-11:11 am

1 stop18h 22m

Ontario

Mon 11/24

12:58 am-7:34 pm

1 stop16h 36m

$135

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/19

6:49 pm-11:11 am

1 stop18h 22m

Ontario

Sat 11/22

12:58 am-7:33 pm

1 stop16h 35m

$137

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/8

8:46 pm-11:59 pm

1 stop5h 13m

Ontario

Mon 1/12

6:00 am-7:51 pm

1 stop11h 51m

$138

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 12/4

8:09 pm-2:25 pm

1 stop20h 16m

Ontario

Sat 12/6

3:20 pm-7:50 pm

1 stop26h 30m

$139

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 11/21

8:28 pm-11:57 pm

1 stop5h 29m

Ontario

Mon 11/24

12:58 am-7:34 pm

1 stop16h 36m

$141

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 12/19

7:00 am-5:09 pm

1 stop12h 09m

Ontario

Sun 1/11

6:00 am-10:11 am

2 stops26h 11m

$241

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/26

11:20 am-11:57 pm

2 stops14h 37m

Ontario

Mon 12/1

5:06 pm-8:03 pm

1 stop24h 57m

$271

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/7

2:45 pm-10:59 am

1 stop22h 14m

Ontario

Wed 1/14

11:53 am-1:50 pm

1 stop23h 57m

$306

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 1/10

7:00 am-1:56 pm

1 stop8h 56m

Ontario

Wed 1/14

7:30 am-11:23 pm

1 stop13h 53m

$307

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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

Layovers

What is the cheapest month to fly to Ontario?

In general, September 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 $327. If you aren’t able to travel during the month of September, then book flights to Ontario from Kansas City during August instead. Flights to Ontario in August, while not as cheap as those in September, still average around $340.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $325. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Kansas City to Ontario for around $401.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Kansas City to Ontario when you can find flight prices for as low as $185. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $386 on average. Flights to Ontario from Kansas City in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Ontario from Kansas City when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $383 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Kansas City for as low as $283 on momondo.

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

As of November 2025, prices for Kansas City to Ontario flights are approximately 21% 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

Direct flights	None

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

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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 13m.
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 November 2025.
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 (57% of total bookings). The next most popular airlines are American Airlines (21%), Frontier (13%), and United Airlines (10%).

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 $142	Free Cancellation	Rating 5.8 3,115 reviews	Search Frontier flights
United Airlines	PriceFrom $284	Free Cancellation	Rating 7.4 9,001 reviews	Search United Airlines flights
Southwest	PriceFrom $290	Free Cancellation	Rating 8.0 4,239 reviews	Search Southwest flights
American Airlines	PriceFrom $298	Free Cancellation	Rating 7.2 11,039 reviews	Search American Airlines 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.

An easier way to manage your Ontario trip

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Cheap flights from Kansas City to Los Angeles from $65

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Kansas City to Los Angeles departing on 1/12. 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 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

What is the cheapest month to fly to Ontario?

What is the cheapest day to depart on your flight to Ontario?

What is the cheapest time of day to depart on your flight to Ontario?

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

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

As of November 2025, prices for Kansas City to Ontario flights are approximately 21% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Ontario?

Which airport is the most popular layover for flights between Kansas City and Ontario?

Salt Lake City (SLC) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Kansas City to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $290.

Which layover airport has the shortest travel time from Kansas City to Ontario?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 4h 55m.

Which layover airport has the shortest connection time from Kansas City to Ontario?

Denver (DEN) has the shortest average layover time for this route: 1h 10m.

When to book flights from Kansas City to Ontario

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

Direct flights

How far is Kansas City to Ontario by plane?

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

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

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

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

What is the most popular airline from Kansas City to Ontario?

Best airlines flying from Kansas City to Ontario

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

Why use momondo?

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

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

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

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

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

Airports servicing California