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Cheap flights from Kansas City to Los Angeles from $61

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.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:41 pm - 12:20 am
MCI
-
ONT
5h 39m1 stop
Frontier Logo
7:30 am - 3:44 pm
ONT
-
MCI
6h 14m1 stop
$149Frontier
Mon, Feb 9 - Wed, Feb 18
Frontier Logo
8:41 pm - 7:59 am
MCI
-
ONT
13h 18m1 stop
Frontier Logo
6:15 am - 7:55 pm
ONT
-
MCI
11h 40m1 stop
$150Frontier
Sat, Feb 28 - Sat, Mar 7
Frontier Logo
8:41 pm - 9:34 pm
MCI
-
ONT
26h 53m1 stop
Frontier Logo
6:05 am - 7:33 pm
ONT
-
MCI
11h 28m1 stop
$154Frontier
Mon, Feb 9 - Thu, Feb 12
Frontier Logo
4:39 pm - 9:34 am
MCI
-
ONT
18h 55m1 stop
Frontier Logo
8:40 am - 3:44 pm
ONT
-
MCI
5h 04m1 stop
$156Frontier
Wed, Feb 18 - Wed, Feb 25
Frontier Logo
9:24 pm - 11:59 pm
MCI
-
ONT
28h 35m1 stop
Frontier Logo
6:15 am - 7:55 pm
ONT
-
MCI
11h 40m1 stop
$160Frontier
Thu, Feb 26 - Sat, Mar 14
Frontier Logo
8:40 pm - 10:59 pm
MCI
-
ONT
28h 19m1 stop
Frontier Logo
6:15 am - 7:55 pm
ONT
-
MCI
11h 40m1 stop
$162Frontier
Sat, Mar 7 - Sat, Mar 14
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
$169Frontier
Thu, Feb 12 - Wed, Feb 18
Frontier Logo
8:43 pm - 12:20 am
MCI
-
ONT
5h 37m1 stop
Frontier Logo
6:05 am - 7:33 pm
ONT
-
MCI
11h 28m1 stop
$170Frontier
Thu, Feb 5 - Thu, Feb 12
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
$171Frontier
Mon, Feb 2 - Mon, Feb 9
Frontier Logo
4:39 pm - 9:34 am
MCI
-
ONT
18h 55m1 stop
Frontier Logo
6:10 am - 12:59 pm
ONT
-
MCI
4h 49m1 stop
$176Frontier
Wed, Feb 18 - Sun, Feb 22

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Feb 9
MCI8:41 pmKansas City
5h 39m
1 stop
ONT12:20 amOntario
Feb 18
ONT7:30 amOntario
6h 14m
1 stop
MCI3:44 pmKansas City
$149
Frontier
Feb 28
MCI8:41 pmKansas City
13h 18m
1 stop
ONT7:59 amOntario
Mar 7
ONT6:15 amOntario
11h 40m
1 stop
MCI7:55 pmKansas City
$150
Frontier
Feb 9
MCI8:41 pmKansas City
26h 53m
1 stop
ONT9:34 pmOntario
Feb 12
ONT6:05 amOntario
11h 28m
1 stop
MCI7:33 pmKansas City
$154

American Airlines flights from Kansas City to Ontario

Our best American Airlines deals on Kansas City to Ontario flight tickets
American Airlines
Feb 16
MCI12:11 pmKansas City
11h 13m
1 stop
ONT9:24 pmOntario
Feb 23
ONT11:58 pmOntario
8h 14m
1 stop
MCI10:12 amKansas City
$294
American Airlines
Jan 15
MCI1:56 pmKansas City
10h 17m
2 stops
ONT10:13 pmOntario
Jan 18
ONT12:13 pmOntario
8h 59m
2 stops
MCI11:12 pmKansas City
$889

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 January 11, 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

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/9

8:41 pm-12:20 am

1 stop5h 39m

Ontario

Wed 2/18

7:30 am-3:44 pm

1 stop6h 14m

$149

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 2/28

8:41 pm-7:59 am

1 stop13h 18m

Ontario

Sat 3/7

6:15 am-7:55 pm

1 stop11h 40m

$150

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/9

8:41 pm-9:34 pm

1 stop26h 53m

Ontario

Thu 2/12

6:05 am-7:33 pm

1 stop11h 28m

$154

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 2/18

4:39 pm-9:34 am

1 stop18h 55m

Ontario

Wed 2/25

8:40 am-3:44 pm

1 stop5h 04m

$156

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 2/26

9:24 pm-11:59 pm

1 stop28h 35m

Ontario

Sat 3/14

6:15 am-7:55 pm

1 stop11h 40m

$160

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Sat 3/7

8:40 pm-10:59 pm

1 stop28h 19m

Ontario

Sat 3/14

6:15 am-7:55 pm

1 stop11h 40m

$162

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

$169

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 2/5

8:43 pm-12:20 am

1 stop5h 37m

Ontario

Thu 2/12

6:05 am-7:33 pm

1 stop11h 28m

$170

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 2/2

8:41 pm-12:20 am

1 stop5h 39m

Ontario

Mon 2/9

6:20 am-7:51 pm

1 stop11h 31m

$171

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 2/18

4:39 pm-9:34 am

1 stop18h 55m

Ontario

Sun 2/22

6:10 am-12:59 pm

1 stop4h 49m

$176

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.

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

As of January 2026, prices for Kansas City to Ontario flights are approximately 32% 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 19m

Direct flights

None
The fastest flight from Kansas City to Ontario takes 5h 19m
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 19m.

  • 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
5.7
3,057 reviews
Search Frontier flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,145 reviews
Search United Airlines flights
American AirlinesPriceFrom $284Free CancellationRating
7.2
11,099 reviews
Search American Airlines flights
SouthwestPriceFrom $289Free CancellationRating
8.0
4,252 reviews
Search Southwest flights

  • Southwest Flights From Kansas City to Ontario

    Southwest flies from Kansas City to Ontario around 3 times per week, with 4,252 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Kansas City to Ontario in the last 72 hours was $289 (round-trip), much lower than the average airfare cost of $393 for Southwest flights on this route.

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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