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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 2/25. 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
8:28 pm - 11:59 pm
MCI
-
ONT
5h 31m1 stop
Frontier Logo
7:30 am - 3:44 pm
ONT
-
MCI
6h 14m1 stop
$155Frontier
Thu, Feb 12 - Wed, Feb 18
Frontier Logo
8:41 pm - 12:20 am
MCI
-
ONT
5h 39m1 stop
Frontier Logo
6:20 am - 7:58 pm
ONT
-
MCI
11h 38m1 stop
$182Frontier
Mon, Feb 2 - Thu, Feb 5
Multiple Airlines Logo
7:00 am - 5:54 pm
MCI
-
ONT
12h 54m1 stop
Multiple Airlines Logo
3:07 pm - 11:33 pm
ONT
-
MCI
6h 26m1 stop
$201Multiple Airlines
Tue, Jan 13 - Tue, Jan 20
Frontier Logo
8:28 pm - 11:59 pm
MCI
-
ONT
5h 31m1 stop
Frontier Logo
6:10 am - 6:31 pm
ONT
-
MCI
10h 21m1 stop
$203Frontier
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
8:41 pm - 12:20 am
MCI
-
ONT
5h 39m1 stop
Multiple Airlines Logo
11:04 am - 11:33 pm
ONT
-
MCI
10h 29m1 stop
$205Multiple Airlines
Mon, Jan 26 - Thu, Jan 29
Frontier Logo
8:23 pm - 11:56 pm
MCI
-
ONT
5h 33m1 stop
Frontier Logo
7:30 am - 3:44 pm
ONT
-
MCI
6h 14m1 stop
$206Frontier
Thu, Jan 8 - Wed, Feb 11
Frontier Logo
8:26 pm - 11:56 pm
MCI
-
ONT
5h 30m1 stop
Frontier Logo
6:10 am - 7:42 pm
ONT
-
MCI
11h 32m1 stop
$209Frontier
Mon, Jan 12 - Mon, Jan 19
Frontier Logo
8:31 pm - 11:56 pm
MCI
-
ONT
5h 25m1 stop
Frontier Logo
6:00 am - 7:41 pm
ONT
-
MCI
11h 41m1 stop
$217Frontier
Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
7:00 am - 2:26 pm
MCI
-
ONT
9h 26m1 stop
Multiple Airlines Logo
2:34 pm - 11:33 pm
ONT
-
MCI
6h 59m1 stop
$219Multiple Airlines
Sat, Jan 10 - Mon, Jan 12
Multiple Airlines Logo
7:00 am - 1:32 pm
MCI
-
ONT
8h 32m1 stop
Multiple Airlines Logo
3:04 pm - 11:33 pm
ONT
-
MCI
6h 29m1 stop
$221Multiple Airlines
Fri, Jan 23 - Sat, Jan 24

American Airlines flights from Kansas City to Ontario

Our best American Airlines deals on Kansas City to Ontario flight tickets
American Airlines
Jan 15
MCI5:48 amKansas City
6h 20m
1 stop
ONT10:08 amOntario
Jan 21
ONT3:09 pmOntario
6h 03m
1 stop
MCI11:12 pmKansas City
$237
Find similar
American Airlines
Jan 13
MCI7:00 amKansas City
11h 05m
2 stops
ONT4:05 pmOntario
Jan 20
ONT3:09 pmOntario
6h 03m
1 stop
MCI11:12 pmKansas City
$242
Find similar
American Airlines
Jan 19
MCI5:48 amKansas City
6h 20m
1 stop
ONT10:08 amOntario
Jan 27
ONT6:22 amOntario
5h 13m
1 stop
MCI1:35 pmKansas City
$278
Find similar

Alaska Airlines flights from Kansas City to Ontario

Our best Alaska Airlines deals on Kansas City to Ontario flight tickets
Alaska Airlines
Jan 14
MCI2:45 pmKansas City
7h 51m
1 stop
ONT8:36 pmOntario
Jan 21
ONT5:59 pmOntario
19h 06m
1 stop
MCI3:05 pmKansas City
$279
Find similar
Alaska Airlines
Jan 21
MCI2:45 pmKansas City
7h 51m
1 stop
ONT8:36 pmOntario
Jan 27
ONT4:03 pmOntario
19h 47m
1 stop
MCI1:50 pmKansas City
$304
Find similar
Alaska Airlines
Feb 6
MCI2:45 pmKansas City
11h 11m
1 stop
ONT11:56 pmOntario
Feb 10
ONT4:03 pmOntario
19h 47m
1 stop
MCI1:50 pmKansas City
$305
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 December 18, 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

Thu 2/12

8:28 pm-11:59 pm

1 stop5h 31m

Ontario

Wed 2/18

7:30 am-3:44 pm

1 stop6h 14m

$155

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/2

8:41 pm-12:20 am

1 stop5h 39m

Ontario

Thu 2/5

6:20 am-7:58 pm

1 stop11h 38m

$182

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 1/13

7:00 am-5:54 pm

1 stop12h 54m

Ontario

Tue 1/20

3:07 pm-11:33 pm

1 stop6h 26m

$201

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 2/19

8:28 pm-11:59 pm

1 stop5h 31m

Ontario

Mon 2/23

6:10 am-6:31 pm

1 stop10h 21m

$203

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 1/26

8:41 pm-12:20 am

1 stop5h 39m

Ontario

Thu 1/29

11:04 am-11:33 pm

1 stop10h 29m

$205

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/8

8:23 pm-11:56 pm

1 stop5h 33m

Ontario

Wed 2/11

7:30 am-3:44 pm

1 stop6h 14m

$206

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 1/12

8:26 pm-11:56 pm

1 stop5h 30m

Ontario

Mon 1/19

6:10 am-7:42 pm

1 stop11h 32m

$209

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 1/9

8:31 pm-11:56 pm

1 stop5h 25m

Ontario

Mon 1/12

6:00 am-7:41 pm

1 stop11h 41m

$217

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 1/10

7:00 am-2:26 pm

1 stop9h 26m

Ontario

Mon 1/12

2:34 pm-11:33 pm

1 stop6h 59m

$219

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 1/23

7:00 am-1:32 pm

1 stop8h 32m

Ontario

Sat 1/24

3:04 pm-11:33 pm

1 stop6h 29m

$221

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 have Kansas City to Ontario flight prices changed over time?

As of December 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

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.
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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?

  • 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
3,081 reviews
Search Frontier flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,090 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,054 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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