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Cheap flights from Kansas City to Los Angeles from $73

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 10/18. 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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Cheap round-trip flights

Frontier Logo
7:02 pm - 11:50 pmMCI-ONT
6h 48m1 stop
Frontier Logo
6:53 am - 5:55 pmONT-MCI
9h 02m1 stop
$143Frontier
Find Deal
Wed, Oct 15 - Wed, Oct 22
Frontier Logo
3:01 pm - 7:54 pmMCI-ONT
6h 53m1 stop
Frontier Logo
8:59 pm - 1:48 pmONT-MCI
14h 49m1 stop
$144Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
Multiple Airlines Logo
7:00 am - 8:42 pmMCI-ONT
15h 42m1 stop
Multiple Airlines Logo
4:02 pm - 7:32 pmONT-MCI
25h 30m1 stop
$222Multiple Airlines
Find Deal
Wed, Nov 19 - Thu, Dec 11
Alaska Airlines Logo
4:49 pm - 11:56 pmMCI-ONT
9h 07m1 stop
Alaska Airlines Logo
7:20 am - 3:54 pmONT-MCI
6h 34m1 stop
$232Alaska Airlines
Find Deal
Thu, Nov 6 - Tue, Nov 11
American Airlines Logo
7:10 am - 12:03 pmMCI-ONT
6h 53m1 stop
American Airlines Logo
4:47 pm - 11:39 pmONT-MCI
4h 52m1 stop
$237American Airlines
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Wed, Nov 19 - Wed, Dec 10
American Airlines Logo
7:00 am - 4:01 pmMCI-ONT
11h 01m2 stops
American Airlines Logo
3:04 pm - 10:54 pmONT-MCI
5h 50m1 stop
$242American Airlines
Find Deal
Wed, Nov 19 - Wed, Dec 10
Alaska Airlines Logo
7:00 am - 3:17 pmMCI-ONT
10h 17m1 stop
Alaska Airlines Logo
7:20 am - 3:54 pmONT-MCI
6h 34m1 stop
$250Alaska Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18
Delta Logo
6:40 am - 12:34 pmMCI-ONT
7h 54m1 stop
Delta Logo
5:05 pm - 12:25 amONT-MCI
5h 20m1 stop
$257Delta
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Tue, Jan 27 - Wed, Feb 4
Delta Logo
6:40 am - 12:34 pmMCI-ONT
7h 54m1 stop
Delta Logo
5:05 pm - 12:25 amONT-MCI
5h 20m1 stop
$261Delta
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Thu, Jan 22 - Tue, Feb 3
Multiple Airlines Logo
3:01 pm - 7:53 amMCI-ONT
18h 52m1 stop
Multiple Airlines Logo
10:28 pm - 2:00 pmONT-MCI
13h 32m1 stop
$301Multiple Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Oct 15
MCI7:02 pmKansas City
6h 48m
1 stop
ONT11:50 pmOntario
Oct 22
ONT6:53 amOntario
9h 02m
1 stop
MCI5:55 pmKansas City
$143
Find similar
Frontier
Oct 3
MCI3:01 pmKansas City
6h 53m
1 stop
ONT7:54 pmOntario
Oct 5
ONT8:59 pmOntario
14h 49m
1 stop
MCI1:48 pmKansas City
$144
Find similar
Frontier
Sep 26
MCI3:01 pmKansas City
6h 53m
1 stop
ONT7:54 pmOntario
Nov 13
ONT6:53 amOntario
10h 40m
1 stop
MCI7:33 pmKansas City
$159
Find similar

Alaska Airlines flights from Kansas City to Ontario

Our best Alaska Airlines deals on Kansas City to Ontario flight tickets
Alaska Airlines
Nov 6
MCI4:49 pmKansas City
9h 07m
1 stop
ONT11:56 pmOntario
Nov 11
ONT7:20 amOntario
6h 34m
1 stop
MCI3:54 pmKansas City
$232
Find similar
Alaska Airlines
Nov 13
MCI7:00 amKansas City
10h 17m
1 stop
ONT3:17 pmOntario
Nov 18
ONT7:20 amOntario
6h 34m
1 stop
MCI3:54 pmKansas City
$250
Find similar
Alaska Airlines
Mar 2
MCI2:55 pmKansas City
9h 42m
1 stop
ONT10:37 pmOntario
Mar 4
ONT7:00 amOntario
7h 20m
1 stop
MCI4:20 pmKansas City
$264
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Kansas City to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Kansas City to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 10/15

7:02 pm-11:50 pm

1 stop6h 48m

Ontario

Wed 10/22

6:53 am-5:55 pm

1 stop9h 02m

$143

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 10/3

3:01 pm-7:54 pm

1 stop6h 53m

Ontario

Sun 10/5

8:59 pm-1:48 pm

1 stop14h 49m

$144

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/19

7:00 am-8:42 pm

1 stop15h 42m

Ontario

Thu 12/11

4:02 pm-7:32 pm

1 stop25h 30m

$222

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 11/6

4:49 pm-11:56 pm

1 stop9h 07m

Ontario

Tue 11/11

7:20 am-3:54 pm

1 stop6h 34m

$232

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/19

7:10 am-12:03 pm

1 stop6h 53m

Ontario

Wed 12/10

4:47 pm-11:39 pm

1 stop4h 52m

$237

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 11/19

7:00 am-4:01 pm

2 stops11h 01m

Ontario

Wed 12/10

3:04 pm-10:54 pm

1 stop5h 50m

$242

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 11/13

7:00 am-3:17 pm

1 stop10h 17m

Ontario

Tue 11/18

7:20 am-3:54 pm

1 stop6h 34m

$250

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 1/27

6:40 am-12:34 pm

1 stop7h 54m

Ontario

Wed 2/4

5:05 pm-12:25 am

1 stop5h 20m

$257

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/22

6:40 am-12:34 pm

1 stop7h 54m

Ontario

Tue 2/3

5:05 pm-12:25 am

1 stop5h 20m

$261

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 10/2

3:01 pm-7:53 am

1 stop18h 52m

Ontario

Mon 10/6

10:28 pm-2:00 pm

1 stop13h 32m

$301

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

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 $333. 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 $385 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 $296 on momondo.

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

As of September 2025, prices for Kansas City to Ontario flights are approximately 59% 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 12m.

  • 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?

  • 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?

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
FrontierPriceFrom $114Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
American AirlinesPriceFrom $284Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
8,926 reviews
Search United 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.

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