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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 3/4. 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
4:39 pm - 9:34 am
MCI
-
ONT
18h 55m1 stop
Frontier Logo
6:00 am - 12:59 pm
ONT
-
MCI
28h 59m1 stop
$148Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
8:41 pm - 3:07 pm
MCI
-
ONT
20h 26m1 stop
Frontier Logo
6:20 am - 7:51 pm
ONT
-
MCI
11h 31m1 stop
$155Frontier
Mon, Feb 2 - Fri, Feb 6
Frontier Logo
4:39 pm - 9:34 am
MCI
-
ONT
18h 55m1 stop
Frontier Logo
6:00 am - 5:28 pm
ONT
-
MCI
9h 28m1 stop
$165Frontier
Wed, Feb 18 - Fri, Feb 20
Frontier Logo
1:44 pm - 11:59 pm
MCI
-
ONT
12h 15m1 stop
Frontier Logo
6:05 am - 7:33 pm
ONT
-
MCI
11h 28m1 stop
$170Frontier
Sun, Feb 15 - Thu, Feb 19
Frontier Logo
1:44 pm - 11:59 pm
MCI
-
ONT
12h 15m1 stop
Frontier Logo
6:00 am - 5:28 pm
ONT
-
MCI
9h 28m1 stop
$172Frontier
Sun, Feb 15 - Fri, Feb 20
Frontier Logo
1:44 pm - 11:59 pm
MCI
-
ONT
12h 15m1 stop
Frontier Logo
7:30 am - 3:44 pm
ONT
-
MCI
6h 14m1 stop
$173Frontier
Sun, Feb 15 - Wed, Feb 18
Multiple Airlines Logo
8:36 pm - 7:59 am
MCI
-
ONT
13h 23m1 stop
Multiple Airlines Logo
3:22 pm - 11:33 pm
ONT
-
MCI
6h 11m1 stop
$176Multiple Airlines
Sat, Feb 21 - Tue, Feb 24
Multiple Airlines Logo
7:00 am - 1:11 pm
MCI
-
ONT
8h 11m1 stop
Multiple Airlines Logo
6:05 am - 7:33 pm
ONT
-
MCI
11h 28m1 stop
$178Multiple Airlines
Wed, Feb 18 - Thu, Feb 19
Multiple Airlines Logo
1:44 pm - 11:59 pm
MCI
-
ONT
12h 15m1 stop
Multiple Airlines Logo
3:22 pm - 11:33 pm
ONT
-
MCI
6h 11m1 stop
$180Multiple Airlines
Sun, Feb 15 - Tue, Feb 24
Frontier Logo
8:26 pm - 11:56 pm
MCI
-
ONT
5h 30m1 stop
Frontier Logo
6:10 am - 7:48 pm
ONT
-
MCI
11h 38m1 stop
$182Frontier
Mon, Jan 12 - Thu, Jan 15

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Feb 18
MCI4:39 pmKansas City
18h 55m
1 stop
ONT9:34 amOntario
Feb 21
ONT6:00 amOntario
28h 59m
1 stop
MCI12:59 pmKansas City
$148
Find similar
Frontier
Feb 2
MCI8:41 pmKansas City
20h 26m
1 stop
ONT3:07 pmOntario
Feb 6
ONT6:20 amOntario
11h 31m
1 stop
MCI7:51 pmKansas City
$155
Find similar
Frontier
Feb 18
MCI4:39 pmKansas City
18h 55m
1 stop
ONT9:34 amOntario
Feb 20
ONT6:00 amOntario
9h 28m
1 stop
MCI5:28 pmKansas City
$165
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 31
MCI5:07 pmKansas City
6h 00m
1 stop
ONT9:07 pmOntario
Jan 1
ONT5:05 amOntario
5h 57m
1 stop
MCI1:02 pmKansas City
$521
Find similar
United Airlines
Jan 1
MCI9:00 amKansas City
5h 38m
1 stop
ONT12:38 pmOntario
Jan 8
ONT1:24 pmOntario
8h 06m
1 stop
MCI11:30 pmKansas City
$541
Find similar
United Airlines
Dec 31
MCI5:07 pmKansas City
6h 00m
1 stop
ONT9:07 pmOntario
Jan 1
ONT5:05 amOntario
5h 57m
1 stop
MCI1:02 pmKansas City
$571
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 27, 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 2/18

4:39 pm-9:34 am

1 stop18h 55m

Ontario

Sat 2/21

6:00 am-12:59 pm

1 stop28h 59m

$148

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/2

8:41 pm-3:07 pm

1 stop20h 26m

Ontario

Fri 2/6

6:20 am-7:51 pm

1 stop11h 31m

$155

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 2/18

4:39 pm-9:34 am

1 stop18h 55m

Ontario

Fri 2/20

6:00 am-5:28 pm

1 stop9h 28m

$165

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sun 2/15

1:44 pm-11:59 pm

1 stop12h 15m

Ontario

Thu 2/19

6:05 am-7:33 pm

1 stop11h 28m

$170

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sun 2/15

1:44 pm-11:59 pm

1 stop12h 15m

Ontario

Fri 2/20

6:00 am-5:28 pm

1 stop9h 28m

$172

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sun 2/15

1:44 pm-11:59 pm

1 stop12h 15m

Ontario

Wed 2/18

7:30 am-3:44 pm

1 stop6h 14m

$173

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 2/21

8:36 pm-7:59 am

1 stop13h 23m

Ontario

Tue 2/24

3:22 pm-11:33 pm

1 stop6h 11m

$176

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 2/18

7:00 am-1:11 pm

1 stop8h 11m

Ontario

Thu 2/19

6:05 am-7:33 pm

1 stop11h 28m

$178

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sun 2/15

1:44 pm-11:59 pm

1 stop12h 15m

Ontario

Tue 2/24

3:22 pm-11:33 pm

1 stop6h 11m

$180

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 1/12

8:26 pm-11:56 pm

1 stop5h 30m

Ontario

Thu 1/15

6:10 am-7:48 pm

1 stop11h 38m

$182

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 24% 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 14m

Direct flights

None
The fastest flight from Kansas City to Ontario takes 5h 14m
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 $75Free CancellationRating
5.8
3,071 reviews
Search Frontier flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,066 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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