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Cheap flights from Kansas City to Los Angeles from $91

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 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Kansas City to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:32 pm - 8:03 am
MCI
-
ONT
17h 31m
1 stop
Frontier Logo
1:38 pm - 3:47 pm
ONT
-
MCI
24h 09m
1 stop
$186Frontier
Mon, Jul 27 - Wed, Jul 29
Frontier Logo
1:45 pm - 10:04 am
MCI
-
ONT
22h 19m
1 stop
Frontier Logo
3:40 pm - 3:47 pm
ONT
-
MCI
22h 07m
1 stop
$201Frontier
Tue, Jul 28 - Wed, Jul 29
Frontier Logo
1:45 pm - 11:49 pm
MCI
-
ONT
12h 04m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$244Frontier
Tue, Aug 25 - Wed, Aug 26
Frontier Logo
1:45 pm - 11:50 pm
MCI
-
ONT
12h 05m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$245Frontier
Tue, Aug 11 - Wed, Aug 12
Frontier Logo
1:45 pm - 11:50 pm
MCI
-
ONT
12h 05m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$247Frontier
Tue, Aug 11 - Wed, Aug 12
Frontier Logo
1:45 pm - 11:49 pm
MCI
-
ONT
12h 04m
1 stop
Frontier Logo
6:00 am - 1:22 pm
ONT
-
MCI
5h 22m
1 stop
$250Frontier
Tue, Sep 8 - Tue, Sep 15
Frontier Logo
1:45 pm - 11:49 pm
MCI
-
ONT
12h 04m
1 stop
Frontier Logo
11:43 am - 12:55 pm
ONT
-
MCI
23h 12m
1 stop
$252Frontier
Wed, Aug 26 - Sat, Aug 29
Frontier Logo
1:45 pm - 10:04 am
MCI
-
ONT
22h 19m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$253Frontier
Tue, Jul 14 - Tue, Aug 4
Frontier Logo
4:32 pm - 8:03 am
MCI
-
ONT
17h 31m
1 stop
Frontier Logo
3:40 pm - 3:47 pm
ONT
-
MCI
22h 07m
1 stop
$256Frontier
Mon, Jul 27 - Wed, Jul 29
Frontier Logo
1:45 pm - 10:04 am
MCI
-
ONT
22h 19m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$257Frontier
Wed, Jul 15 - Tue, Jul 21

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Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Jul 27
MCI4:32 pmKansas City
17h 31m
1 stop
ONT8:03 amOntario
Jul 29
ONT1:38 pmOntario
24h 09m
1 stop
MCI3:47 pmKansas City
$186
Frontier
Aug 25
MCI1:45 pmKansas City
12h 04m
1 stop
ONT11:49 pmOntario
Aug 26
ONT6:00 amOntario
5h 00m
1 stop
MCI1:00 pmKansas City
$244
Frontier
Aug 11
MCI1:45 pmKansas City
12h 05m
1 stop
ONT11:50 pmOntario
Aug 12
ONT6:00 amOntario
5h 00m
1 stop
MCI1:00 pmKansas City
$245

American Airlines flights from Kansas City to Ontario

Our best American Airlines deals on Kansas City to Ontario flight tickets
American Airlines
Jun 24
MCI5:31 amKansas City
8h 16m
1 stop
ONT11:47 amOntario
Jul 1
ONT6:10 amOntario
5h 17m
1 stop
MCI1:27 pmKansas City
$549
American Airlines
Jun 24
MCI5:31 amKansas City
8h 33m
2 stops
ONT12:04 pmOntario
Jul 1
ONT6:10 amOntario
5h 17m
1 stop
MCI1:27 pmKansas City
$554
American Airlines
Jun 24
MCI5:31 amKansas City
8h 33m
2 stops
ONT12:04 pmOntario
Jul 1
ONT1:11 pmOntario
9h 14m
2 stops
MCI12:25 amKansas City
$559

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 June 16, 2026.
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

Cheapest round-trip

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 7/27

4:32 pm-8:03 am

1 stop17h 31m

Ontario

Wed 7/29

1:38 pm-3:47 pm

1 stop24h 09m

$186

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 7/28

1:45 pm-10:04 am

1 stop22h 19m

Ontario

Wed 7/29

3:40 pm-3:47 pm

1 stop22h 07m

$201
Quickest round-trip

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 8/25

1:45 pm-11:49 pm

1 stop12h 04m

Ontario

Wed 8/26

6:00 am-1:00 pm

1 stop5h 00m

$244

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 8/11

1:45 pm-11:50 pm

1 stop12h 05m

Ontario

Wed 8/12

6:00 am-1:00 pm

1 stop5h 00m

$245

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 8/11

1:45 pm-11:50 pm

1 stop12h 05m

Ontario

Wed 8/12

6:00 am-1:00 pm

1 stop5h 00m

$247

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 9/8

1:45 pm-11:49 pm

1 stop12h 04m

Ontario

Tue 9/15

6:00 am-1:22 pm

1 stop5h 22m

$250

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 8/26

1:45 pm-11:49 pm

1 stop12h 04m

Ontario

Sat 8/29

11:43 am-12:55 pm

1 stop23h 12m

$252

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 7/14

1:45 pm-10:04 am

1 stop22h 19m

Ontario

Tue 8/4

6:00 am-1:00 pm

1 stop5h 00m

$253

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 7/27

4:32 pm-8:03 am

1 stop17h 31m

Ontario

Wed 7/29

3:40 pm-3:47 pm

1 stop22h 07m

$256

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 7/15

1:45 pm-10:04 am

1 stop22h 19m

Ontario

Tue 7/21

6:00 am-1:00 pm

1 stop5h 00m

$257

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Los Angeles from

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 typical price of a round-trip flight between Kansas City and Ontario?

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 $319. 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 June 2026, prices for Kansas City to Ontario flights are approximately 100% more expensive 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 15m

Direct flights

None
The fastest flight from Kansas City to Ontario takes 5h 15m
There are no direct flights from Kansas City to Ontario. There are no popular flight routes from Kansas City to Ontario.
Search flight deals

Frequently asked questions about flying from Kansas City to Ontario

  • 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 15m.

  • 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 $94Free CancellationRating
5.6
2,883 reviews
Search Frontier flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
9,842 reviews
Search United Airlines flights
SouthwestPriceFrom $269Free CancellationRating
7.9
4,237 reviews
Search Southwest flights
American AirlinesPriceFrom $284Free CancellationRating
7.1
11,666 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.

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