$152 Cheap Frontier Airlines flights Kansas City (MCI) to Ontario (ONT)

View $152 flight on Wed, Oct 22, 2025Opens in a new window

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$152 Cheap Frontier Airlines flights Kansas City (MCI) to Ontario (ONT)

Prices were available within the past 7 days and start at $152 for one-way flights and $184 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Oct 15 - Thu, Oct 23
MCI
Kansas City
ONT
Ontario
$184 Roundtrip, found 5 days ago
$184
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Oct 15 from Kansas City to Ontario, returning Thu, Oct 23, priced at $184 found 5 days ago
Frontier Airlines
Sat, Oct 25 - Sun, Nov 2
MCI
Kansas City
ONT
Ontario
$187 Roundtrip, found 5 days ago
$187
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sat, Oct 25 from Kansas City to Ontario, returning Sun, Nov 2, priced at $187 found 5 days ago
Frontier Airlines
Sun, Nov 9 - Sun, Nov 16
MCI
Kansas City
ONT
Ontario
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sun, Nov 9 from Kansas City to Ontario, returning Sun, Nov 16, priced at $191 found 4 days ago
Frontier Airlines
Sat, Oct 11 - Tue, Oct 14
MCI
Kansas City
ONT
Ontario
$212 Roundtrip, found 3 days ago
$212
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Oct 11 from Kansas City to Ontario, returning Tue, Oct 14, priced at $212 found 3 days ago
Frontier Airlines
Sat, Oct 18 - Mon, Oct 20
MCI
Kansas City
ONT
Ontario
$218 Roundtrip, found 21 hours ago
$218
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Sat, Oct 18 from Kansas City to Ontario, returning Mon, Oct 20, priced at $218 found 21 hours ago
Frontier Airlines
Fri, Sep 26 - Wed, Oct 1
MCI
Kansas City
ONT
Ontario
$230 Roundtrip, found 5 days ago
$230
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Kansas City to Ontario, returning Wed, Oct 1, priced at $230 found 5 days ago
Frontier Airlines
Sun, Sep 21 - Wed, Sep 24
MCI
Kansas City
ONT
Ontario
$248 Roundtrip, found 22 hours ago
$248
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Sun, Sep 21 from Kansas City to Ontario, returning Wed, Sep 24, priced at $248 found 22 hours ago
Flights from Kansas City (MCI) to Ontario (ONT)
Origin airport
Kansas City Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
American Airlines
Distance
1313 mi

Frequently asked questions

How much is a Frontier Airlines flight from Kansas City Intl. Airport (MCI) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll discover budget-friendly return Frontier Airlines flights from $184 from MCI to ONT by filtering your results from "Price (lowest to highest)" on Expedia. Or look for deals from $152 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from MCI to ONT with Frontier Airlines?
Look for one-way or return flights to Ontario in January or April. You could find lower fares with Frontier Airlines during these off-peak travel months.
What is the cheapest time to book flights from Kansas City Intl. Airport (MCI) to Los Angeles - Ontario Intl. Airport (ONT) with Frontier Airlines?
Look for cheap Frontier Airlines flights from Kansas City Intl. Airport (MCI) to Los Angeles - Ontario Intl. Airport (ONT) one to three months prior to your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from Kansas City Intl. Airport (MCI) to Los Angeles - Ontario Intl. Airport (ONT)?
Select our "Nonstop" filter when searching for direct Frontier Airlines flights from MCI to ONT. You can also compare other airlines offering the same direct route.
What is the earliest Frontier Airlines flight from MCI to ONT?
To find the earliest departure from MCI to ONT with Frontier Airlines, filter your results by "Early Morning" and "Morning." Choosing an early flight generally means you're less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in Ontario?
Los Angeles - Ontario Intl. Airport (ONT) is the primary Ontario gateway for Frontier Airlines flights from Kansas City Intl. Airport (MCI).
Why fly with Frontier Airlines from MCI to ONT?
Offering a rewarding loyalty program, Frontier Airlines is a top pick for many passengers flying from MCI to ONT. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from Kansas City Intl. Airport (MCI) to Los Angeles - Ontario Intl. Airport (ONT)?
It's usually possible to cancel or modify your flight, although there may be additional fees if you made your booking more than 24 hours ago. Need to keep your options open? Use our "Changes included" or "No cancel fee" filter to find flights that won't charge you extra if you need to adjust your plans. To make changes, head to "Trips," select your flight and click on "Manage Booking" for further information.

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