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Cheap flights from Kansas City to Los Angeles from $78

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 9/29. 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
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
2:17 pm - 11:55 pmMCI  Kansas City-ONT Ontario
11h 38m1 stop Denver Intl
Frontier Logo
6:15 am - 1:22 pmONT  Ontario-MCI Kansas City
5h 07m1 stop Denver Intl
$158Frontier
Wed, Oct 28 - Sat, Oct 31
Frontier Logo
2:17 pm - 11:55 pmMCI  Kansas City-ONT Ontario
11h 38m1 stop Denver Intl
Frontier Logo
6:15 am - 1:22 pmONT  Ontario-MCI Kansas City
5h 07m1 stop Denver Intl
$158Frontier
Tue, Nov 3 - Wed, Nov 4
Multiple Airlines Logo
2:53 pm - 9:51 amMCI  Kansas City-ONT Ontario
20h 58m1 stop Portland
Multiple Airlines Logo
11:45 am - 7:37 pmONT  Ontario-MCI Kansas City
5h 52m1 stop Denver Intl
$249Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Southwest Logo
8:10 am - 2:45 pmMCI  Kansas City-ONT Ontario
8h 35m1 stop Houston Hobby
Southwest Logo
5:40 am - 2:55 pmONT  Ontario-MCI Kansas City
7h 15m2 stops Las Vegas Harry Reid Intl Dallas Love Field
$261Southwest
Wed, Oct 28 - Sat, Oct 31
Multiple Airlines Logo
7:00 am - 2:09 pmMCI  Kansas City-ONT Ontario
9h 09m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
11:45 am - 7:37 pmONT  Ontario-MCI Kansas City
5h 52m1 stop Denver Intl
$270Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
Southwest Logo
12:35 pm - 6:10 pmMCI  Kansas City-ONT Ontario
7h 35m1 stop Dallas Love Field
Southwest Logo
12:00 pm - 8:15 pmONT  Ontario-MCI Kansas City
6h 15m1 stop Sacramento Intl
$281Southwest
Sat, Oct 3 - Mon, Oct 5
American Airlines Logo
5:28 am - 12:03 pmMCI  Kansas City-ONT Ontario
8h 35m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
11:59 pm - 8:57 amONT  Ontario-MCI Kansas City
6h 58m1 stop Dallas/Fort Worth
$286American Airlines
Sat, Oct 3 - Mon, Oct 5
American Airlines Logo
6:20 am - 12:03 pmMCI  Kansas City-ONT Ontario
7h 43m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
12:37 pm - 11:24 pmONT  Ontario-MCI Kansas City
8h 47m1 stop Dallas/Fort Worth
$298American Airlines
Tue, Sep 8 - Tue, Sep 15
United Airlines Logo
11:31 am - 6:01 pmMCI  Kansas City-ONT Ontario
8h 30m2 stops Denver Intl San Francisco
United Airlines Logo
6:00 am - 4:11 pmONT  Ontario-MCI Kansas City
8h 11m2 stops San Francisco Denver Intl
$324United Airlines
Wed, Oct 28 - Sat, Oct 31
United Airlines Logo
5:05 pm - 8:20 pmMCI  Kansas City-ONT Ontario
5h 15m1 stop Denver Intl
United Airlines Logo
6:45 am - 4:19 pmONT  Ontario-MCI Kansas City
7h 34m1 stop Chicago O'Hare Intl
$347United Airlines
Sat, Jan 23 - Sat, Jan 30

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American Airlines flights from Kansas City to Ontario

Our best American Airlines deals on Kansas City to Ontario flight tickets
American Airlines
Oct 3
MCI5:28 amKansas City
8h 35m
2 stops
ONT12:03 pmOntario
Oct 5
ONT11:59 pmOntario
6h 58m
1 stop
MCI8:57 amKansas City
$286
American Airlines
Sep 5
MCI11:20 amKansas City
8h 55m
2 stops
ONT6:15 pmOntario
Sep 11
ONT1:04 pmOntario
8h 20m
2 stops
MCI11:24 pmKansas City
$301
American Airlines
Sep 8
MCI6:20 amKansas City
7h 43m
2 stops
ONT12:03 pmOntario
Sep 15
ONT1:04 pmOntario
8h 20m
2 stops
MCI11:24 pmKansas City
$303

Frontier flights from Kansas City to Ontario

Our best Frontier deals on Kansas City to Ontario flight tickets
Frontier
Oct 28
MCI2:17 pmKansas City
11h 38m
1 stop
ONT11:55 pmOntario
Oct 31
ONT6:15 amOntario
5h 07m
1 stop
MCI1:22 pmKansas City
$158
Frontier
Sep 26
MCI8:32 pmKansas City
5h 15m
1 stop
ONT11:47 pmOntario
Oct 3
ONT11:45 amOntario
5h 52m
1 stop
MCI7:37 pmKansas City
$159
Frontier
Sep 5
MCI1:38 pmKansas City
12h 12m
1 stop
ONT11:50 pmOntario
Sep 11
ONT12:07 pmOntario
29h 30m
2 stops
MCI7:37 pmKansas City
$181

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 August 12, 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

Cheapest round-trip

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 10/28

2:17 pm-11:55 pm

1 stop11h 38m

Ontario

Sat 10/31

6:15 am-1:22 pm

1 stop5h 07m

$158

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 11/3

2:17 pm-11:55 pm

1 stop11h 38m

Ontario

Wed 11/4

6:15 am-1:22 pm

1 stop5h 07m

$158

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 9/8

2:53 pm-9:51 am

1 stop20h 58m

Ontario

Tue 9/15

11:45 am-7:37 pm

1 stop5h 52m

$249

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 10/28

8:10 am-2:45 pm

1 stop8h 35m

Ontario

Sat 10/31

5:40 am-2:55 pm

2 stops7h 15m

$261

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 9/2

7:00 am-2:09 pm

1 stop9h 09m

Ontario

Wed 9/9

11:45 am-7:37 pm

1 stop5h 52m

$270

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Sat 10/3

12:35 pm-6:10 pm

1 stop7h 35m

Ontario

Mon 10/5

12:00 pm-8:15 pm

1 stop6h 15m

$281

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Sat 10/3

5:28 am-12:03 pm

2 stops8h 35m

Ontario

Mon 10/5

11:59 pm-8:57 am

1 stop6h 58m

$286

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Tue 9/8

6:20 am-12:03 pm

2 stops7h 43m

Ontario

Tue 9/15

12:37 pm-11:24 pm

1 stop8h 47m

$298

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Wed 10/28

11:31 am-6:01 pm

2 stops8h 30m

Ontario

Sat 10/31

6:00 am-4:11 pm

2 stops8h 11m

$324
Quickest round-trip

Kansas CityOntario

MCI Kansas City - ONT Ontario

MCIONT

Kansas City

Sat 1/23

5:05 pm-8:20 pm

1 stop5h 15m

Ontario

Sat 1/30

6:45 am-4:19 pm

1 stop7h 34m

$347

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 $290 to $463.
The lowest price recently found on this route was $153.

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 $318. 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 $346.

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

Fastest flight time

5h 15m

Direct flights

None
The fastest flight from Kansas City to Ontario takes 5h 15m
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 15m.

  • 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
2,701 reviews
Search Frontier flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,913 reviews
Search American Airlines flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
10,111 reviews
Search United Airlines flights
SouthwestPriceFrom $269Free CancellationRating
8.0
4,218 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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