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Cheap flights from Kansas City to Los Angeles from $56

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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0 bags

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Cheap round-trip flights

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Frontier Logo
5:46 pm - 10:39 pm
MCI
-
ONT
6h 53m1 stop
Frontier Logo
7:00 am - 4:50 pm
ONT
-
MCI
7h 50m1 stop
$109Frontier
mié., feb. 18 - mié., feb. 25
Frontier Logo
8:46 pm - 11:59 pm
MCI
-
ONT
29h 13m1 stop
Frontier Logo
7:00 am - 4:50 pm
ONT
-
MCI
7h 50m1 stop
$115Frontier
vie., feb. 20 - mié., feb. 25
Frontier Logo
5:46 pm - 10:39 pm
MCI
-
ONT
6h 53m1 stop
Frontier Logo
6:00 am - 7:51 pm
ONT
-
MCI
11h 51m1 stop
$127Frontier
mié., feb. 18 - lun., feb. 23
Frontier Logo
8:41 pm - 12:20 am
MCI
-
ONT
5h 39m1 stop
Frontier Logo
6:20 am - 7:51 pm
ONT
-
MCI
11h 31m1 stop
$128Frontier
vie., feb. 6 - lun., feb. 9
Multiple Airlines Logo
5:46 pm - 10:39 pm
MCI
-
ONT
6h 53m1 stop
Multiple Airlines Logo
1:37 pm - 11:33 pm
ONT
-
MCI
7h 56m1 stop
$141Multiple Airlines
mié., feb. 18 - mar., feb. 24
Multiple Airlines Logo
8:46 pm - 11:59 pm
MCI
-
ONT
29h 13m1 stop
Multiple Airlines Logo
1:37 pm - 11:33 pm
ONT
-
MCI
7h 56m1 stop
$147Multiple Airlines
vie., feb. 20 - mar., feb. 24
Frontier Logo
8:46 pm - 9:17 pm
MCI
-
ONT
26h 31m2 stops
Frontier Logo
7:00 am - 4:50 pm
ONT
-
MCI
7h 50m1 stop
$150Frontier
sáb., feb. 21 - mié., feb. 25
Frontier Logo
8:41 pm - 12:20 am
MCI
-
ONT
5h 39m1 stop
Frontier Logo
6:00 am - 7:51 pm
ONT
-
MCI
11h 51m1 stop
$155Frontier
vie., feb. 6 - sáb., feb. 14
Frontier Logo
5:46 pm - 10:39 pm
MCI
-
ONT
6h 53m1 stop
Frontier Logo
5:57 pm - 7:51 pm
ONT
-
MCI
23h 54m2 stops
$156Frontier
mié., feb. 18 - jue., feb. 26
Frontier Logo
5:46 pm - 10:39 pm
MCI
-
ONT
6h 53m1 stop
Frontier Logo
6:00 am - 7:51 pm
ONT
-
MCI
11h 51m1 stop
$157Frontier
mié., feb. 18 - sáb., feb. 21

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Feb 18
MCI5:46 pmKansas City
6h 53m
1 stop
ONT10:39 pmOntario
Feb 25
ONT7:00 amOntario
7h 50m
1 stop
MCI4:50 pmKansas City
$109
Find similar
Frontier
Feb 20
MCI8:46 pmKansas City
29h 13m
1 stop
ONT11:59 pmOntario
Feb 25
ONT7:00 amOntario
7h 50m
1 stop
MCI4:50 pmKansas City
$115
Find similar
Frontier
Feb 18
MCI5:46 pmKansas City
6h 53m
1 stop
ONT10:39 pmOntario
Feb 23
ONT6:00 amOntario
11h 51m
1 stop
MCI7:51 pmKansas City
$127
Find similar

United Airlines flights from Kansas City to Ontario

Our best United Airlines deals on Kansas City to Ontario flight tickets
United Airlines
Dec 17
MCI9:02 amKansas City
5h 30m
1 stop
ONT12:32 pmOntario
Dec 21
ONT1:40 pmOntario
7h 35m
1 stop
MCI11:15 pmKansas City
$532
Find similar
United Airlines
Dec 15
MCI5:10 pmKansas City
5h 32m
1 stop
ONT8:42 pmOntario
Jan 7
ONT5:05 amOntario
5h 32m
1 stop
MCI12:37 pmKansas City
$573
Find similar
United Airlines
Dec 16
MCI9:02 amKansas City
5h 30m
1 stop
ONT12:32 pmOntario
Jan 10
ONT1:24 pmOntario
8h 06m
1 stop
MCI11:30 pmKansas City
$575
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 diciembre 4, 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

mié. 2/18

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

mié. 2/25

7:00 am-4:50 pm

1 stop7h 50m

$109

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

vie. 2/20

8:46 pm-11:59 pm

1 stop29h 13m

Ontario

mié. 2/25

7:00 am-4:50 pm

1 stop7h 50m

$115

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

mié. 2/18

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

lun. 2/23

6:00 am-7:51 pm

1 stop11h 51m

$127

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

vie. 2/6

8:41 pm-12:20 am

1 stop5h 39m

Ontario

lun. 2/9

6:20 am-7:51 pm

1 stop11h 31m

$128

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

mié. 2/18

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

mar. 2/24

1:37 pm-11:33 pm

1 stop7h 56m

$141

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

vie. 2/20

8:46 pm-11:59 pm

1 stop29h 13m

Ontario

mar. 2/24

1:37 pm-11:33 pm

1 stop7h 56m

$147

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

sáb. 2/21

8:46 pm-9:17 pm

2 stops26h 31m

Ontario

mié. 2/25

7:00 am-4:50 pm

1 stop7h 50m

$150

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

vie. 2/6

8:41 pm-12:20 am

1 stop5h 39m

Ontario

sáb. 2/14

6:00 am-7:51 pm

1 stop11h 51m

$155

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

mié. 2/18

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

jue. 2/26

5:57 pm-7:51 pm

2 stops23h 54m

$156

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

mié. 2/18

5:46 pm-10:39 pm

1 stop6h 53m

Ontario

sáb. 2/21

6:00 am-7:51 pm

1 stop11h 51m

$157

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 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 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 $388 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 $279 on momondo.

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

As of December 2025, prices for Kansas City to Ontario flights are approximately 17% 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 13m

Direct flights

None
The fastest flight from Kansas City to Ontario takes 5h 13m
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 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?

  • 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 $75Free CancellationRating
5.8
3,092 reviews
Search Frontier flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,253 reviews
Search Southwest flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,045 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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