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Kailua-Kona

$176+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$352
(Alaska Airlines)

One-way from

$176
(Alaska Airlines)

Popular in

June

Cheapest in

April

Average price

$464
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. 14% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 10/299:45 amONT - KOA
1 stop10h 47mAlaska Airlines
Wed 11/58:45 amKOA - ONT
1 stop10h 08mAlaska Airlines
Deal found 8/16$357
This Delta deal was found by Cheapflights users on 8/17. 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 9/96:00 amONT - KOA
1 stop14h 34mDelta
Tue 9/169:30 pmKOA - ONT
1 stop10h 39mDelta
Deal found 8/17$361
This Delta deal was found by Cheapflights users on 8/17. 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 9/96:00 amONT - KOA
1 stop14h 34mDelta
Wed 9/179:30 pmKOA - ONT
2 stops11h 47mDelta
Deal found 8/17$366
This Delta deal was found by Cheapflights users on 8/17. 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.
Mon 9/86:00 amONT - KOA
1 stop14h 34mDelta
Tue 9/169:30 pmKOA - ONT
1 stop10h 39mDelta
Deal found 8/17$367
This Delta deal was found by Cheapflights users on 8/18. 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 10/316:00 amONT - KOA
2 stops14h 30mDelta
Fri 11/79:30 pmKOA - ONT
1 stop11h 38mDelta
Deal found 8/18$372
This Delta deal was found by Cheapflights users on 8/17. 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.
Wed 9/106:05 amONT - KOA
2 stops14h 29mDelta
Tue 9/169:30 pmKOA - ONT
2 stops11h 47mDelta
Deal found 8/17$378
This Southwest deal was found by Cheapflights users on 8/17. 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 9/175:45 amONT - KOA
1 stop9h 25mSouthwest
Mon 9/228:30 pmKOA - ONT
1 stop13h 50mSouthwest
Deal found 8/17$379
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 10/299:45 amONT - KOA
1 stop10h 47mAlaska Airlines
Sun 11/23:49 pmKOA - ONT
1 stop23h 25mAlaska Airlines
Deal found 8/16$381
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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.
Wed 10/221:31 pmONT - KOA
1 stop11h 09mAlaska Airlines
Tue 10/289:20 pmKOA - ONT
1 stop10h 45mAlaska Airlines
Deal found 8/17$382
This Delta deal was found by Cheapflights users on 8/17. 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.
Wed 9/176:00 amONT - KOA
1 stop14h 29mDelta
Mon 9/229:30 pmKOA - ONT
2 stops15h 27mDelta
Deal found 8/17$384
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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
Mon 9/2212:16 pmKOA - ONT
1 stop8h 38mAlaska Airlines
Deal found 8/17$385
This Delta deal was found by Cheapflights users on 8/17. 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.
Sun 8/316:00 amONT - KOA
1 stop14h 34mDelta
Tue 9/99:47 pmKOA - ONT
1 stop10h 03mDelta
Deal found 8/17$386

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 August 18, 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

Wed 10/29

9:45 am-5:32 pm

1 stop10h 47m

Kona Intl

Wed 11/5

8:45 am-8:53 pm

1 stop10h 08m

$357

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 10/1

6:05 am-1:05 pm

1 stop10h 00m

Kona Intl

Thu 10/9

9:15 am-8:15 pm

1 stop8h 00m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/4

6:37 am-6:30 pm

1 stop13h 53m

Kona Intl

Wed 11/12

8:45 pm-10:50 am

1 stop12h 05m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 9/9

6:00 am-5:34 pm

1 stop14h 34m

Kona Intl

Fri 9/19

9:30 pm-11:09 am

1 stop10h 39m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/4

6:37 am-6:30 pm

1 stop13h 53m

Kona Intl

Fri 11/7

9:30 pm-11:08 am

1 stop11h 38m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 9/10

6:00 am-5:34 pm

1 stop14h 34m

Kona Intl

Fri 9/19

9:30 pm-11:09 am

1 stop10h 39m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 9/9

6:00 am-5:34 pm

1 stop14h 34m

Kona Intl

Tue 9/16

9:30 pm-11:09 am

1 stop10h 39m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/4

6:37 am-6:30 pm

1 stop13h 53m

Kona Intl

Tue 11/11

8:45 pm-10:50 am

1 stop12h 05m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 9/10

6:00 am-5:34 pm

1 stop14h 34m

Kona Intl

Tue 9/16

9:30 pm-11:09 am

1 stop10h 39m

$361

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 11/5

6:37 am-6:30 pm

1 stop13h 53m

Kona Intl

Tue 11/11

8:45 pm-10:50 am

1 stop12h 05m

$361

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 23 results
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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 August 8, 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 August 18, 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.

What’s the top layover airport for flights from Ontario to Kailua-Kona?

Share of 1-stop round-trip flights from Ontario to Kailua-Kona chosen by Cheapflights users in the past 12 months, using the same layover each way.

Seattle (SEA) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Kailua-Kona on Cheapflights.

What’s the cheapest layover airport for flights from Ontario to Kailua-Kona?

Average round-trip fare for 1-stop flights from Ontario to Kailua-Kona, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Seattle (SEA) is the most affordable 1-stop option, with an average round-trip price of $487.

What’s the fastest layover option from Ontario to Kailua-Kona?

Shortest average travel time for 1-stop one-way flights from Ontario to Kailua-Kona, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Las Vegas (LAS) have the shortest average one-way travel time for 1-stop routes: 8h 00m.

Which airport typically offers the quickest layover for flights from Ontario to Kailua-Kona?

Average layover duration for 1-stop one-way flights from Ontario to Kailua-Kona, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 2h 18m.

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 August 18, 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

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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
2,664 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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
8,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

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.

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

    There are many flights that can get you from Ontario to Kailua-Kona in 10h. Fly via Alaska Airlines, Southwest, or Delta to get the fastest option. The distance from Ontario to Kailua-Kona is about 2547 mi. This flight may include one or multiple stops.

  • 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 $220. Other airlines that can offer you cheap pricing are Hawaiian Airlines, from $232, and United Airlines, from $265. Delta is currently priced 52% below the average price you’ll pay for this route.

  • 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$220Average$368FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$232Average$429FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$265Average$410FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$277Average$535FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$340Average$644FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$348Average$487FlexibilityNo cancel feeOn-time75%

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