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$158+ Cheap flights from Kailua-Kona to Ontario (KOA - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Kailua-Kona to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Kailua-Kona (KOA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$347
(Alaska Airlines)

One-way from

$158
(KAYAK)

Popular in

June

Cheapest in

August

Average price

$477
From Kona Intl to Ontario
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One-way flight from Kona Intl to Ontario
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Highest demand for flights based on searches. 0% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Kailua-Kona to Ontario

Cheapest flights from Kailua-Kona to Ontario
Explore the most affordable flight options available from Kailua-Kona to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:00 amKOA - ONT
1 stop13h 03mAlaska Airlines
Mon 9/293:06 pmONT - KOA
1 stop10h 03mAlaska Airlines
Deal found 9/10$347
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:44 pmKOA - ONT
2 stops12h 33mDelta
Mon 9/296:00 amONT - KOA
1 stop14h 29mDelta
Deal found 9/10$422
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:16 pmKOA - ONT
1 stop8h 38mAlaska Airlines
Thu 10/23:06 pmONT - KOA
1 stop9h 34mAlaska Airlines
Deal found 9/10$549
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:08 pmKOA - ONT
1 stop26h 02mAlaska Airlines
Mon 9/153:06 pmONT - KOA
1 stop10h 03mAlaska Airlines
Deal found 9/10$558
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/129:55 pmKOA - ONT
1 stop8h 26mAmerican Airlines
Mon 9/156:10 amONT - KOA
1 stop11h 15mAmerican Airlines
Deal found 9/10$561
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:08 pmKOA - ONT
2 stops16h 01mDelta
Mon 9/156:00 amONT - KOA
1 stop14h 29mDelta
Deal found 9/10$566
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:30 pmKOA - ONT
1 stop10h 25mSouthwest
Mon 9/1510:20 amONT - KOA
2 stops10h 50mSouthwest
Deal found 9/10$572
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/251:40 pmKOA - ONT
1 stop30h 11mUnited Airlines
Sat 11/16:00 amONT - KOA
1 stop9h 06mUnited Airlines
Deal found 9/10$578
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1011:43 amKOA - ONT
1 stop9h 49mAlaska Airlines
Wed 11/1911:59 amONT - KOA
1 stop11h 41mAlaska Airlines
Deal found 9/10$587
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:20 pmKOA - ONT
1 stop12h 17mAlaska Airlines
Thu 10/1611:07 amONT - KOA
1 stop9h 40mAlaska Airlines
Deal found 9/11$589
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2110:05 pmKOA - ONT
1 stop9h 50mAlaska Airlines
Sun 11/307:50 amONT - KOA
1 stop27h 04mAlaska Airlines
Deal found 9/11$610

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kailua-Kona 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Kailua-Kona to Ontario that are best for you.

Fly from

Kailua-Kona

Fly to

Ontario

Route

Depart

Return

Price

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/25

8:00 am-12:03 am

1 stop13h 03m

Ontario

Mon 9/29

3:06 pm-10:09 pm

1 stop10h 03m

$347

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/25

8:44 pm-12:17 pm

2 stops12h 33m

Ontario

Mon 9/29

6:00 am-5:29 pm

1 stop14h 29m

$422

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/25

12:16 pm-11:54 pm

1 stop8h 38m

Ontario

Thu 10/2

3:06 pm-9:40 pm

1 stop9h 34m

$549

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sat 10/25

1:40 pm-10:51 pm

1 stop30h 11m

Ontario

Sat 11/1

6:00 am-12:06 pm

1 stop9h 06m

$578

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 11/10

11:43 am-11:32 pm

1 stop9h 49m

Ontario

Wed 11/19

11:59 am-9:40 pm

1 stop11h 41m

$587

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 10/13

9:20 pm-12:37 pm

1 stop12h 17m

Ontario

Thu 10/16

11:07 am-5:47 pm

1 stop9h 40m

$589

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 11/21

10:05 pm-9:55 am

1 stop9h 50m

Ontario

Sun 11/30

7:50 am-8:54 am

1 stop27h 04m

$610

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 10/6

10:00 pm-5:40 pm

1 stop16h 40m

Ontario

Sun 10/12

1:53 pm-8:45 pm

1 stop9h 52m

$1,355

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 11/4

9:20 pm-11:05 am

1 stop11h 45m

Ontario

Tue 11/11

9:45 am-5:22 pm

1 stop9h 37m

$1,704

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 11/6

6:00 am-5:14 pm

1 stop9h 14m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 21 results
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Best time to book a flight from Kailua-Kona to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Kailua-Kona with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Kailua-Kona to Ontario

What is the cheapest month to book a flight from Kailua-Kona to Ontario?

Currently, August is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $246). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KOA to ONT?

Find hourly flight availability from Kailua-Kona to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

One of the essential ways to save on airfare from Kailua-Kona to Ontario is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 45% on airfare.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Southwest from Kailua-Kona to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Kailua-Kona to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Kailua-Kona to Ontario?

    Departing from Kailua-Kona to Ontario will take you 12h 33m. Airlines will cover a distance of 2547 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Kailua-Kona to Ontario round-trip?

    Our cheapest airline available from Kailua-Kona to Ontario is Southwest. Our recent data shows that you can find tickets from as low as $319 on this airline. You may be able to fly from Kailua-Kona to Ontario for 30% less than the average price by searching for this airline.

  • Can I find deals for flights from Kailua-Kona to Ontario that include hotel bookings?

    Yes. In addition to deals on Kailua-Kona to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Kailua-Kona to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kailua-Kona to Ontario.

  • Can I find deals for business class flights from Kailua-Kona to Ontario?

    Yes. Cheapflights offers flight deals from Kailua-Kona to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Kailua-Kona to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $246). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Kailua-Kona to Ontario

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Top airline flying from Kailua-Kona to Ontario

Discover the top airline that operate flights from Kailua-Kona to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$477FlexibilityNo cancel feeOn-time63%

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