$139 Cheap Flights from Kailua-Kona (KOA) to Ontario (ONT)

View $139 flight on Fri, Sep 12, 2025Opens in a new window

Popular airlines from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Kailua-Kona to Ontario (KOA-ONT)

Prices were available within the past 7 days and start at $139 for one-way flights and $274 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bargain Flight
Thu, Sep 11 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$274 Roundtrip, found 11 hours ago
$274
Roundtrip
found 11 hours ago
Select Bargain Flight flight, departing Thu, Sep 11 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $274 found 11 hours ago
United
Tue, Sep 9 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$283 Roundtrip, found 2 days ago
$283
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 9 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $283 found 2 days ago
American Airlines
Thu, Sep 11 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$285 Roundtrip, found 11 hours ago
$285
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Thu, Sep 11 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $285 found 11 hours ago
American Airlines
Tue, Sep 9 - Fri, Sep 12
KOA
Kona Coast
ONT
Ontario
$297 Roundtrip, found 1 day ago
$297
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 9 from Kona Coast to Ontario, returning Fri, Sep 12, priced at $297 found 1 day ago
Bargain Flight
Sun, Sep 14 - Thu, Sep 18
KOA
Kona Coast
ONT
Ontario
$300 Roundtrip, found 1 day ago
$300
Roundtrip
found 1 day ago
Select Bargain Flight flight, departing Sun, Sep 14 from Kona Coast to Ontario, returning Thu, Sep 18, priced at $300 found 1 day ago
Southwest Airlines
Thu, Sep 11 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$301 Roundtrip, found 11 hours ago
$301
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Thu, Sep 11 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $301 found 11 hours ago
Alaska Airlines
Thu, Sep 11 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$303 Roundtrip, found 11 hours ago
$303
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Thu, Sep 11 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $303 found 11 hours ago
Southwest Airlines
Wed, Aug 20 - Mon, Aug 25
KOA
Kona Coast
ONT
Ontario
$305 Roundtrip, found 20 hours ago
$305
Roundtrip
found 20 hours ago
Select Southwest Airlines flight, departing Wed, Aug 20 from Kona Coast to Ontario, returning Mon, Aug 25, priced at $305 found 20 hours ago
Southwest Airlines
Thu, Sep 11 - Mon, Sep 15
KOA
Kona Coast
ONT
Ontario
$306 Roundtrip, found 11 hours ago
$306
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Thu, Sep 11 from Kona Coast to Ontario, returning Mon, Sep 15, priced at $306 found 11 hours ago
Delta
Sun, Aug 24 - Thu, Sep 4
KOA
Kona Coast
ONT
Ontario
$311 Roundtrip, found 7 hours ago
$311
Roundtrip
found 7 hours ago
Select Delta flight, departing Sun, Aug 24 from Kona Coast to Ontario, returning Thu, Sep 4, priced at $311 found 7 hours ago

Find the cheapest month to fly from Kailua-Kona (KOA) to Ontario (ONT)

January is typically the cheapest month to fly

From $251 - $1,072 per traveler.

Graph displaying average flight prices per month

Flights from Kailua-Kona (KOA) to Ontario (ONT)
Origin airport
Kona Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$274
Distance
2548 mi

Kailua-Kona to Ontario Flights

The cheapest times to fly from Kailua-Kona to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kailua-Kona to Ontario are during the month of September. You can find some of the cheapest flights from Kailua-Kona to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kailua-Kona to Ontario

Sunday is one of the best days to book for cheap flights from Kailua-Kona to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kailua-Kona to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kailua-Kona to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $139 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kailua-Kona to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kailua-Kona to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Discover the latest flight deals from KOA to ONT by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from KOA to ONT?
The cheapest flights from KOA to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from KOA to ONT?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from KOA to ONT. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT)?
Direct flights from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from KOA to ONT?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) on schedule, select a flight that takes off from Kona Intl. Airport (KOA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Kona Intl. Airport (KOA)?
Browse your flight options from Kona Intl. Airport (KOA) to Los Angeles Intl. Airport (LAX). This is the only Ontario airport you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until right before your break to book a flight from KOA to ONT often results in higher prices. While you may come across some last-minute discounts, there's no guarantee. Keep your travel plans flexible for the best chance of snagging a bargain.
Is it cheaper to book a KOA to ONT flight and hotel package?
Booking a KOA to ONT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our impressive range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Kona Intl. Airport (KOA) to Los Angeles - Ontario Intl. Airport (ONT)?
If you booked your KOA to ONT flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.