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Kailua-Kona

$142+ Cheap flights from Ontario to Kailua-Kona (ONT - KOA)

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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Kona Intl are usually found in April or February, booked 78 days in advance, depart on a Sunday or Wednesday and return on a Wednesday

Cheap flight deals from Ontario to Kailua-Kona

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Kailua-Kona (KOA). 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 11, 2025.

Round-trip from

$283
(Delta)

One-way from

$142
(Alaska Airlines)

Popular in

June

Cheapest in

April

Average price

$509
From Ontario to Kona Intl
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One-way flight from Ontario to Kona Intl
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Highest demand for flights based on searches. 13% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 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 Ontario to Kailua-Kona

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

This Delta deal was found by Cheapflights users on 7/9. 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.
Tue 10/146:45 amONT - KOA
1 stop13h 59mDelta
Fri 10/319:45 pmKOA - ONT
1 stop13h 12mDelta
Deal found 7/9$283
This Southwest deal was found by Cheapflights users on 7/8. 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.
Wed 8/275:45 amONT - KOA
1 stop9h 25mSouthwest
Thu 9/49:15 amKOA - ONT
2 stops10h 30mSouthwest
Deal found 7/8$306
This Alaska Airlines deal was found by Cheapflights users on 7/9. 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 9/183:06 pmONT - KOA
1 stop10h 03mAlaska Airlines
Thu 9/258:00 amKOA - ONT
1 stop10h 10mAlaska Airlines
Deal found 7/9$313
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Mon 8/181:19 pmONT - KOA
1 stop9h 02mUnited Airlines
Wed 8/2711:00 pmKOA - ONT
1 stop10h 13mUnited Airlines
Deal found 7/10$383

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Kailua-Kona 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 11, 2025.
Use the filters below to find and compare flights from Ontario to Kailua-Kona that are best for you.

Fly from

Ontario

Fly to

Kailua-Kona

Route

Depart

Return

Price

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 9/15

6:00 am-5:29 pm

1 stop14h 29m

Kona Intl

Wed 9/24

9:30 pm-11:09 am

1 stop10h 39m

$283

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 8/27

5:45 am-12:10 pm

1 stop9h 25m

Kona Intl

Thu 9/4

9:15 am-10:45 pm

2 stops10h 30m

$306

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 9/18

3:06 pm-10:09 pm

1 stop10h 03m

Kona Intl

Thu 9/25

8:00 am-9:10 pm

1 stop10h 10m

$313

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 8/18

1:19 pm-7:21 pm

1 stop9h 02m

Kona Intl

Wed 8/27

11:00 pm-12:13 pm

1 stop10h 13m

$383

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 7/30

2:21 pm-10:04 pm

1 stop10h 43m

Kona Intl

Sun 8/3

9:30 pm-11:05 am

1 stop10h 35m

$423

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 8/18

2:22 pm-10:04 pm

1 stop10h 42m

$142

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 9/16

1:42 pm-7:24 pm

1 stop8h 42m

$192

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 8/21

6:00 am-5:34 pm

1 stop14h 34m

$212

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 9/4

5:40 am-2:25 pm

2 stops11h 45m

$242

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 8/21

3:04 pm-10:09 pm

1 stop10h 05m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Best time to book a flight from Ontario to Kailua-Kona

Have a flexible travel schedule? Discover the best time to fly to Kailua-Kona from Ontario 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 Ontario to Kailua-Kona

How far ahead should I book a flight from Ontario to Kailua-Kona?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Kailua-Kona. Price data was last updated on June 27, 2025.

To ensure you get the cheapest price possible for a flight from Ontario to Kailua-Kona, you should look to book at least 78 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $409). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $624). 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 ONT to KOA?

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

When flying from Ontario to Kailua-Kona, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 78% versus a flight at noon.

Reviews of airlines servicing Kailua-Kona

Get insights into the airlines that provide service to Kailua-Kona. 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 Kailua-Kona. Reviews last updated July 11, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Ontario to Kailua-Kona to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

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

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

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
4,250 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

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
7,951 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

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
8,846 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

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 Ontario to Kailua-Kona. 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 Ontario to Kailua-Kona round-trip?

    Cheapflights users have booked flights from Ontario to Kailua-Kona round-trip from $283. Other airlines that can offer you cheap pricing are Alaska Airlines, from $303, and Southwest, from $346. Delta is currently priced 39% below the average price you’ll pay for this route.

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

    The cheapest airlines for a one-way flight from Ontario to Kailua-Kona are Alaska Airlines ($142), Delta ($182), and United Airlines ($192).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Kailua-Kona 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 Ontario to Kailua-Kona?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $409). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $624). 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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Top 6 airlines flying from Ontario to Kailua-Kona

Discover the top 6 airlines that operate flights from Ontario to Kailua-Kona. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$233Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$247Average$418FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$251Average$467FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$277Average$544FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$340Average$534FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$348Average$494FlexibilityNo cancel feeOn-time75%

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