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Cheap flights from Kansas City to Los Angeles from $63

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 2/18. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:23 pm - 11:56 pmMCI-ONT
5h 33m1 stop
Frontier Logo
6:00 am - 7:26 pmONT-MCI
11h 26m1 stop
$138Frontier
Find Deal
Do, Jan 8 - Mo, Jan 12
Frontier Logo
8:23 pm - 11:56 pmMCI-ONT
5h 33m1 stop
Frontier Logo
6:00 am - 7:26 pmONT-MCI
11h 26m1 stop
$142Frontier
Find Deal
Do, Jan 8 - Mo, Jan 12
Frontier Logo
8:26 pm - 11:59 pmMCI-ONT
5h 33m1 stop
Frontier Logo
6:10 am - 7:42 pmONT-MCI
11h 32m1 stop
$145Frontier
Find Deal
Do, Jan 15 - So, Jan 18
Frontier Logo
5:46 pm - 10:39 pmMCI-ONT
6h 53m1 stop
Frontier Logo
7:00 am - 4:50 pmONT-MCI
7h 50m1 stop
$150Frontier
Find Deal
Mi, Feb 11 - Mi, Feb 18
Multiple Airlines Logo
8:27 pm - 10:59 pmMCI-ONT
28h 32m1 stop
Multiple Airlines Logo
2:34 pm - 11:33 pmONT-MCI
6h 59m1 stop
$163Multiple Airlines
Find Deal
Fr, Jan 16 - Mo, Jan 19
Frontier Logo
8:45 pm - 10:12 pmMCI-ONT
27h 27m1 stop
Frontier Logo
6:00 am - 7:26 pmONT-MCI
11h 26m1 stop
$176Frontier
Find Deal
Mo, Jan 5 - Mo, Jan 12
Frontier Logo
8:23 pm - 11:56 pmMCI-ONT
5h 33m1 stop
Frontier Logo
6:00 am - 7:26 pmONT-MCI
11h 26m1 stop
$182Frontier
Find Deal
Do, Jan 8 - Mo, Jan 12
Frontier Logo
8:23 pm - 2:54 pmMCI-ONT
20h 31m2 stops
Frontier Logo
6:00 am - 7:26 pmONT-MCI
11h 26m1 stop
$183Frontier
Find Deal
Do, Jan 8 - Mo, Jan 12
Frontier Logo
2:48 pm - 2:25 pmMCI-ONT
25h 37m1 stop
Frontier Logo
4:01 pm - 7:50 pmONT-MCI
25h 49m1 stop
$185Frontier
Find Deal
Fr, Dez 12 - So, Dez 14
Multiple Airlines Logo
7:00 am - 2:26 pmMCI-ONT
9h 26m1 stop
Multiple Airlines Logo
6:49 pm - 11:33 pmONT-MCI
26h 44m1 stop
$187Multiple Airlines
Find Deal
Sa, Jan 10 - Mi, Jan 14

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Jan 8
MCI8:23 pmKansas City
5h 33m
1 stop
ONT11:56 pmOntario
Jan 12
ONT6:00 amOntario
11h 26m
1 stop
MCI7:26 pmKansas City
$142
Find similar
Frontier
Jan 15
MCI8:26 pmKansas City
5h 33m
1 stop
ONT11:59 pmOntario
Jan 18
ONT6:10 amOntario
11h 32m
1 stop
MCI7:42 pmKansas City
$145
Find similar
Frontier
Jan 5
MCI8:45 pmKansas City
27h 27m
1 stop
ONT10:12 pmOntario
Jan 12
ONT6:00 amOntario
11h 26m
1 stop
MCI7:26 pmKansas City
$176
Find similar

Delta flights from Kansas City to Ontario

Our best Delta deals on Kansas City to Ontario flight tickets
Delta
Jan 8
MCI2:53 pmKansas City
9h 58m
2 stops
ONT10:51 pmOntario
Jan 12
ONT7:30 amOntario
11h 09m
2 stops
MCI8:39 pmKansas City
$276
Find similar
Delta
Dec 13
MCI7:50 amKansas City
16h 57m
1 stop
ONT10:47 pmOntario
Dec 18
ONT12:40 pmOntario
8h 42m
1 stop
MCI11:22 pmKansas City
$307
Find similar
Delta
Nov 27
MCI6:28 amKansas City
7h 50m
1 stop
ONT12:18 pmOntario
Nov 30
ONT4:49 pmOntario
5h 35m
1 stop
MCI12:24 amKansas City
$617
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 November 21, 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

Do 1/8

8:23 pm-11:56 pm

1 stop5h 33m

Ontario

Mo 1/12

6:00 am-7:26 pm

1 stop11h 26m

$138

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Do 1/8

8:23 pm-11:56 pm

1 stop5h 33m

Ontario

Mo 1/12

6:00 am-7:26 pm

1 stop11h 26m

$142

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Do 1/15

8:26 pm-11:59 pm

1 stop5h 33m

Ontario

So 1/18

6:10 am-7:42 pm

1 stop11h 32m

$145

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mi 2/11

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

Mi 2/18

7:00 am-4:50 pm

1 stop7h 50m

$150

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fr 1/16

8:27 pm-10:59 pm

1 stop28h 32m

Ontario

Mo 1/19

2:34 pm-11:33 pm

1 stop6h 59m

$163

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mo 1/5

8:45 pm-10:12 pm

1 stop27h 27m

Ontario

Mo 1/12

6:00 am-7:26 pm

1 stop11h 26m

$176

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Do 1/8

8:23 pm-11:56 pm

1 stop5h 33m

Ontario

Mo 1/12

6:00 am-7:26 pm

1 stop11h 26m

$182

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Do 1/8

8:23 pm-2:54 pm

2 stops20h 31m

Ontario

Mo 1/12

6:00 am-7:26 pm

1 stop11h 26m

$183

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fr 12/12

2:48 pm-2:25 pm

1 stop25h 37m

Ontario

So 12/14

4:01 pm-7:50 pm

1 stop25h 49m

$185

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sa 1/10

7:00 am-2:26 pm

1 stop9h 26m

Ontario

Mi 1/14

6:49 pm-11:33 pm

1 stop26h 44m

$187

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, 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.

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 have Kansas City to Ontario flight prices changed over time?

As of November 2025, prices for Kansas City to Ontario flights are approximately 23% 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

Direct flights

None
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 14m.

  • 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 $142Free CancellationRating
5.8
3,103 reviews
Search Frontier flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,029 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,251 reviews
Search Southwest flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,047 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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