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Cheap flights from Kansas City to Los Angeles from $122

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Kansas City to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:32 pm - 10:17 pmMCI  Kansas City-ONT Ontario
27h 45m1 stop Denver Intl
Frontier Logo
6:00 am - 7:35 pmONT  Ontario-MCI Kansas City
11h 35m1 stop Denver Intl
$225Frontier
Tue, Dec 8 - Tue, Dec 15
Frontier Logo
8:29 pm - 10:17 pmMCI  Kansas City-ONT Ontario
27h 48m1 stop Denver Intl
Frontier Logo
11:30 am - 7:35 pmONT  Ontario-MCI Kansas City
6h 05m1 stop Denver Intl
$227Frontier
Fri, Dec 4 - Tue, Dec 8
Multiple Airlines Logo
6:30 am - 4:05 pmMCI  Kansas City-ONT Ontario
11h 35m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
11:30 am - 7:35 pmONT  Ontario-MCI Kansas City
6h 05m1 stop Denver Intl
$384Multiple Airlines
Sat, Dec 12 - Sun, Dec 13
Delta Logo
6:02 pm - 11:57 pmMCI  Kansas City-ONT Ontario
7h 55m1 stop Salt Lake City
Delta Logo
7:05 am - 4:34 pmONT  Ontario-MCI Kansas City
7h 29m1 stop Atlanta Hartsfield-Jackson
$401Delta
Wed, Dec 9 - Sat, Dec 12
American Airlines Logo
8:13 am - 12:39 pmMCI  Kansas City-ONT Ontario
6h 26m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
1:23 pm - 11:36 pmONT  Ontario-MCI Kansas City
8h 13m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$426American Airlines
Thu, Dec 10 - Mon, Dec 14
United Airlines Logo
1:36 pm - 8:38 pmMCI  Kansas City-ONT Ontario
9h 02m2 stops Denver Intl San Francisco
United Airlines Logo
6:00 am - 4:13 pmONT  Ontario-MCI Kansas City
8h 13m2 stops San Francisco Denver Intl
$431United Airlines
Wed, Dec 9 - Mon, Dec 14
United Airlines Logo
5:45 am - 12:19 pmMCI  Kansas City-ONT Ontario
8h 34m2 stops Denver Intl San Francisco
United Airlines Logo
6:00 am - 4:09 pmONT  Ontario-MCI Kansas City
8h 09m2 stops San Francisco Denver Intl
$431United Airlines
Wed, Jan 6 - Mon, Jan 11
American Airlines Logo
5:01 am - 12:39 pmMCI  Kansas City-ONT Ontario
9h 38m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
9:28 am - 7:52 pmONT  Ontario-MCI Kansas City
8h 24m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$467American Airlines
Fri, Jan 22 - Mon, Feb 1
Southwest Logo
6:00 am - 9:10 amMCI  Kansas City-ONT Ontario
5h 10m1 stop Phoenix Sky Harbor Intl
Southwest Logo
5:50 am - 12:40 pmONT  Ontario-MCI Kansas City
4h 50m1 stop Phoenix Sky Harbor Intl
$475Southwest
Fri, Apr 16 - Tue, Apr 20
Southwest Logo
1:50 pm - 7:25 pmMCI  Kansas City-ONT Ontario
7h 35m2 stops Denver Intl Phoenix Sky Harbor Intl
Southwest Logo
8:50 am - 4:40 pmONT  Ontario-MCI Kansas City
5h 50m1 stop Houston Hobby
$480Southwest
Fri, Apr 16 - Tue, Apr 20

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Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Dec 8
MCI8:32 pmKansas City
27h 45m
1 stop
ONT10:17 pmOntario
Dec 15
ONT6:00 amOntario
11h 35m
1 stop
MCI7:35 pmKansas City
$225
Frontier
Dec 4
MCI8:29 pmKansas City
27h 48m
1 stop
ONT10:17 pmOntario
Dec 8
ONT11:30 amOntario
6h 05m
1 stop
MCI7:35 pmKansas City
$227
Frontier
Dec 8
MCI8:32 pmKansas City
16h 13m
1 stop
ONT10:45 amOntario
Dec 15
ONT6:00 amOntario
11h 35m
1 stop
MCI7:35 pmKansas City
$230

momondo Fare Finder

 
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

Cheapest round-trip

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 12/8

8:32 pm-10:17 pm

1 stop27h 45m

Ontario

Tue 12/15

6:00 am-7:35 pm

1 stop11h 35m

$225

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Fri 12/4

8:29 pm-10:17 pm

1 stop27h 48m

Ontario

Tue 12/8

11:30 am-7:35 pm

1 stop6h 05m

$227

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Sat 12/12

6:30 am-4:05 pm

1 stop11h 35m

Ontario

Sun 12/13

11:30 am-7:35 pm

1 stop6h 05m

$384

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 12/9

6:02 pm-11:57 pm

1 stop7h 55m

Ontario

Sat 12/12

7:05 am-4:34 pm

1 stop7h 29m

$401

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 12/10

8:13 am-12:39 pm

1 stop6h 26m

Ontario

Mon 12/14

1:23 pm-11:36 pm

2 stops8h 13m

$426

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 12/9

1:36 pm-8:38 pm

2 stops9h 02m

Ontario

Mon 12/14

6:00 am-4:13 pm

2 stops8h 13m

$431

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 1/6

5:45 am-12:19 pm

2 stops8h 34m

Ontario

Mon 1/11

6:00 am-4:09 pm

2 stops8h 09m

$431

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Fri 1/22

5:01 am-12:39 pm

2 stops9h 38m

Ontario

Mon 2/1

9:28 am-7:52 pm

2 stops8h 24m

$467
Quickest round-trip

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Fri 4/16

6:00 am-9:10 am

1 stop5h 10m

Ontario

Tue 4/20

5:50 am-12:40 pm

1 stop4h 50m

$475

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Fri 4/16

1:50 pm-7:25 pm

2 stops7h 35m

Ontario

Tue 4/20

8:50 am-4:40 pm

1 stop5h 50m

$480

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 typical price of a round-trip flight between Kansas City and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $370 to $494.
The lowest price recently found on this route was $225.

What is the cheapest month to fly to Ontario?

In general, September 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 $307. If you aren’t able to travel during the month of September, then book flights to Ontario from Kansas City during April instead. Flights to Ontario in April, while not as cheap as those in September, still average around $360.

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

As of November 2026, prices for Kansas City to Ontario flights are approximately 55% 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

Best Price Found

$122

Fastest flight time

5h 08m

Direct flights

None
The best one-way flight to Ontario from Kansas City in the past 72 hours is $122. The best round-trip flight deal from Kansas City to Ontario found on momondo in the last 72 hours is $225.
The fastest flight from Kansas City to Ontario takes 5h 08m
There are no direct flights from Kansas City to Ontario. There are no popular flight routes from Kansas City to Ontario.
Search flight deals

Frequently asked questions about flying from Kansas City to Ontario

  • 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 08m.

  • 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 $125Free CancellationRating
5.5
2,503 reviews
Search Frontier flights
American AirlinesPriceFrom $248Free CancellationRating
7.0
12,234 reviews
Search American Airlines flights
SouthwestPriceFrom $256Free CancellationRating
8.0
4,218 reviews
Search Southwest flights
United AirlinesPriceFrom $316Free CancellationRating
7.3
10,495 reviews
Search United 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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