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Cheap flights from Kansas City to Los Angeles from $90

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 - 10:30 amMCI  Kansas City-ONT Ontario
15h 58m1 stop Denver Intl
Frontier Logo
11:45 am - 7:37 pmONT  Ontario-MCI Kansas City
5h 52m1 stop Denver Intl
$193Frontier
Thu, Sep 24 - Tue, Sep 29
Frontier Logo
8:43 pm - 10:29 amMCI  Kansas City-ONT Ontario
15h 46m1 stop Denver Intl
Frontier Logo
11:52 am - 7:48 pmONT  Ontario-MCI Kansas City
5h 56m1 stop Denver Intl
$201Frontier
Wed, Oct 21 - Mon, Oct 26
Alaska Airlines Logo
2:53 pm - 8:24 pmMCI  Kansas City-ONT Ontario
7h 31m1 stop Portland
Alaska Airlines Logo
12:12 pm - 11:59 pmONT  Ontario-MCI Kansas City
9h 47m1 stop Seattle/Tacoma Intl
$349Alaska Airlines
Thu, Sep 17 - Wed, Sep 23
American Airlines Logo
2:30 pm - 10:01 pmMCI  Kansas City-ONT Ontario
9h 31m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
12:57 pm - 11:59 pmONT  Ontario-MCI Kansas City
9h 02m1 stop Phoenix Sky Harbor Intl
$365American Airlines
Thu, Jan 28 - Mon, Feb 1
Delta Logo
2:30 pm - 10:14 pmMCI  Kansas City-ONT Ontario
9h 44m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 4:26 pmONT  Ontario-MCI Kansas City
7h 26m1 stop Atlanta Hartsfield-Jackson
$371Delta
Tue, Jan 12 - Wed, Jan 20
American Airlines Logo
8:00 am - 4:07 pmMCI  Kansas City-ONT Ontario
10h 07m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
12:57 pm - 11:11 pmONT  Ontario-MCI Kansas City
8h 14m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$373American Airlines
Thu, Jan 28 - Mon, Feb 1
Southwest Logo
5:20 am - 12:50 pmMCI  Kansas City-ONT Ontario
9h 30m2 stops Dallas Love Field Austin Bergstrom
Southwest Logo
10:45 am - 8:10 pmONT  Ontario-MCI Kansas City
7h 25m2 stops Sacramento Intl Las Vegas Harry Reid Intl
$381Southwest
Thu, Oct 29 - Sat, Nov 7
Southwest Logo
2:55 pm - 9:00 pmMCI  Kansas City-ONT Ontario
8h 05m2 stops Dallas Love Field San Jose
Southwest Logo
10:25 am - 7:35 pmONT  Ontario-MCI Kansas City
7h 10m2 stops San Jose San Diego
$381Southwest
Tue, Dec 8 - Tue, Dec 15
United Airlines Logo
6:00 pm - 11:06 pmMCI  Kansas City-ONT Ontario
7h 06m1 stop San Francisco
United Airlines Logo
1:33 pm - 10:14 pmONT  Ontario-MCI Kansas City
6h 41m1 stop San Francisco
$382United Airlines
Thu, Jan 28 - Sun, Jan 31
United Airlines Logo
6:00 am - 12:20 pmMCI  Kansas City-ONT Ontario
8h 20m2 stops Denver Intl San Francisco
United Airlines Logo
5:00 am - 12:52 pmONT  Ontario-MCI Kansas City
5h 52m1 stop Denver Intl
$387United Airlines
Thu, Jan 28 - Sun, Jan 31

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Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Sep 24
MCI8:32 pmKansas City
15h 58m
1 stop
ONT10:30 amOntario
Sep 29
ONT11:45 amOntario
5h 52m
1 stop
MCI7:37 pmKansas City
$193
Frontier
Oct 21
MCI8:43 pmKansas City
15h 46m
1 stop
ONT10:29 amOntario
Oct 26
ONT11:52 amOntario
5h 56m
1 stop
MCI7:48 pmKansas City
$201
Frontier
Oct 7
MCI8:32 pmKansas City
15h 57m
1 stop
ONT10:29 amOntario
Oct 10
ONT6:15 amOntario
11h 33m
1 stop
MCI7:48 pmKansas City
$218

United Airlines flights from Kansas City to Ontario

Our best United Airlines deals on Kansas City to Ontario flight tickets
United Airlines
Sep 9
MCI3:29 pmKansas City
6h 32m
1 stop
ONT8:01 pmOntario
Sep 22
ONT9:01 amOntario
12h 29m
2 stops
MCI11:30 pmKansas City
$477
United Airlines
Sep 2
MCI11:32 amKansas City
10h 29m
2 stops
ONT8:01 pmOntario
Sep 5
ONT1:18 pmOntario
5h 21m
1 stop
MCI8:39 pmKansas City
$480
United Airlines
Sep 6
MCI6:00 amKansas City
8h 50m
2 stops
ONT12:50 pmOntario
Sep 10
ONT6:08 amOntario
6h 25m
1 stop
MCI2:33 pmKansas City
$488

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

Thu 9/24

8:32 pm-10:30 am

1 stop15h 58m

Ontario

Tue 9/29

11:45 am-7:37 pm

1 stop5h 52m

$193

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 10/21

8:43 pm-10:29 am

1 stop15h 46m

Ontario

Mon 10/26

11:52 am-7:48 pm

1 stop5h 56m

$201

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 9/17

2:53 pm-8:24 pm

1 stop7h 31m

Ontario

Wed 9/23

12:12 pm-11:59 pm

1 stop9h 47m

$349

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 1/28

2:30 pm-10:01 pm

1 stop9h 31m

Ontario

Mon 2/1

12:57 pm-11:59 pm

1 stop9h 02m

$365

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 1/12

2:30 pm-10:14 pm

1 stop9h 44m

Ontario

Wed 1/20

7:00 am-4:26 pm

1 stop7h 26m

$371

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 1/28

8:00 am-4:07 pm

1 stop10h 07m

Ontario

Mon 2/1

12:57 pm-11:11 pm

2 stops8h 14m

$373

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 10/29

5:20 am-12:50 pm

2 stops9h 30m

Ontario

Sat 11/7

10:45 am-8:10 pm

2 stops7h 25m

$381

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 12/8

2:55 pm-9:00 pm

2 stops8h 05m

Ontario

Tue 12/15

10:25 am-7:35 pm

2 stops7h 10m

$381
Quickest round-trip

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 1/28

6:00 pm-11:06 pm

1 stop7h 06m

Ontario

Sun 1/31

1:33 pm-10:14 pm

1 stop6h 41m

$382

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Thu 1/28

6:00 am-12:20 pm

2 stops8h 20m

Ontario

Sun 1/31

5:00 am-12:52 pm

1 stop5h 52m

$387

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $322 to $410.
The lowest price recently found on this route was $193.

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 $298. If you aren’t able to travel during the month of September, then book flights to Ontario from Kansas City during October instead. Flights to Ontario in October, while not as cheap as those in September, still average around $319.

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

As of August 2026, prices for Kansas City to Ontario flights are approximately 5% 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

$90

Fastest flight time

5h 08m

Direct flights

None
The best one-way flight to Ontario from Kansas City in the past 72 hours is $90. The best round-trip flight deal from Kansas City to Ontario found on momondo in the last 72 hours is $193.
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
5.6
2,647 reviews
Search Frontier flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,995 reviews
Search American Airlines flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
10,123 reviews
Search United Airlines flights
SouthwestPriceFrom $303Free CancellationRating
8.0
4,204 reviews
Search Southwest 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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