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$147+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$361
(Southwest)

One-way from

$147
(lastminute.com)

Popular in

June

Cheapest in

August

Average price

$397
From Kona Intl to Ontario
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One-way flight from Kona Intl to Ontario
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 8/269:15 amKOA - ONT
1 stop8h 00mSouthwest
Mon 9/88:05 amONT - KOA
1 stop8h 00mSouthwest
Deal found 7/26$361
This Delta deal was found by Cheapflights users on 7/27. 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 9/49:47 pmKOA - ONT
1 stop10h 03mDelta
Wed 9/106:00 amONT - KOA
1 stop14h 34mDelta
Deal found 7/27$362
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 12/191:03 pmKOA - ONT
1 stop8h 56mAlaska Airlines
Sun 1/47:00 amONT - KOA
1 stop9h 43mAlaska Airlines
Deal found 7/28$411
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 9/1011:00 pmKOA - ONT
1 stop10h 13mUnited Airlines
Wed 9/171:42 pmONT - KOA
1 stop8h 42mUnited Airlines
Deal found 7/27$461
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 8/129:40 pmKOA - ONT
1 stop17h 12mAmerican Airlines
Sat 8/164:54 pmONT - KOA
1 stop24h 10mAmerican Airlines
Deal found 7/28$612
This United deal was found by Cheapflights users on 7/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:00 pmKOA - ONT
1 stop16h 40mMultiple Airlines
Fri 10/36:00 amONT - KOA
1 stop18h 40mMultiple Airlines
Deal found 7/29$2,146

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 July 29, 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

Tue 8/26

9:15 am-8:15 pm

1 stop8h 00m

Ontario

Mon 9/8

8:05 am-1:05 pm

1 stop8h 00m

$361

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/4

9:47 pm-10:50 am

1 stop10h 03m

Ontario

Wed 9/10

6:00 am-5:34 pm

1 stop14h 34m

$362

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 12/19

1:03 pm-11:59 pm

1 stop8h 56m

Ontario

Sun 1/4

7:00 am-2:43 pm

1 stop9h 43m

$411

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 9/10

11:00 pm-12:13 pm

1 stop10h 13m

Ontario

Wed 9/17

1:42 pm-7:24 pm

1 stop8h 42m

$461

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 8/12

9:40 pm-5:52 pm

1 stop17h 12m

Ontario

Sat 8/16

4:54 pm-2:04 pm

1 stop24h 10m

$612

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 10/1

10:00 pm-5:40 pm

1 stop16h 40m

Ontario

Fri 10/3

6:00 am-9:40 pm

1 stop18h 40m

$2,146

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/25

12:16 pm-11:54 pm

1 stop8h 38m

$147

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 9/25

9:32 pm-10:44 am

1 stop10h 12m

$192

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 8/20

11:00 pm-12:13 pm

1 stop10h 13m

$205

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 8/21

9:47 pm-10:50 am

1 stop10h 03m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 11 results
1
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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 July 29, 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 July 29, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying 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 $361 on this airline. Additional options worth looking into are Delta and Alaska Airlines, starting at $362 and $411 round-trip. You may be able to fly from Kailua-Kona to Ontario for 20% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Kailua-Kona to Ontario one-way?

    One-way options have recently been found by users for as low as $147 on Alaska Airlines. Other airlines that offer cheap prices include Hawaiian Airlines from $192 and United Airlines from $205 one-way.

  • 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$477FlexibilityNo cancel feeOn-time63%

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