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Kailua-Kona

$152+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Find cheap flights from Ontario to Kailua-Kona with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Ontario to Kona Intl are usually found in April or January, booked 79 days in advance, depart on a Sunday or Wednesday and return on a Wednesday

Cheap 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 December 28, 2025.

This Delta deal was found by Cheapflights users on 12/27. 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.
Tue 12/3011:42 amONT - KOA
1 stop10h 00mDelta
Tue 1/69:30 pmKOA - ONT
2 stops16h 42mDelta
Deal found 12/27$567
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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.
Sun 12/286:00 amONT - KOA
1 stop13h 25mAlaska Airlines
Wed 12/311:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Deal found 12/25$637
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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 12/297:00 amONT - KOA
1 stop9h 45mAlaska Airlines
Wed 12/311:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Deal found 12/25$662
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amONT - KOA
1 stop9h 45mMultiple Airlines
Thu 1/811:59 amKOA - ONT
1 stop8h 29mMultiple Airlines
Deal found 12/26$713
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amONT - KOA
1 stop9h 45mAlaska Airlines
Tue 1/61:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Deal found 12/26$717
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Sun 12/286:00 amONT - KOA
1 stop8h 51mUnited Airlines
Mon 12/2911:59 pmKOA - ONT
1 stop8h 02mUnited Airlines
Deal found 12/25$737
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amONT - KOA
1 stop9h 45mMultiple Airlines
Fri 1/912:51 pmKOA - ONT
1 stop7h 37mMultiple Airlines
Deal found 12/26$743
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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.
Sat 12/276:00 amONT - KOA
1 stop13h 25mAlaska Airlines
Tue 12/3011:45 amKOA - ONT
1 stop10h 29mAlaska Airlines
Deal found 12/25$747
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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.
Sun 12/286:00 amONT - KOA
1 stop13h 25mAlaska Airlines
Mon 1/59:30 pmKOA - ONT
1 stop10h 20mAlaska Airlines
Deal found 12/25$753
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Thu 12/2510:42 amONT - KOA
1 stop11h 54mUnited Airlines
Mon 12/2911:59 pmKOA - ONT
1 stop8h 02mUnited Airlines
Deal found 12/25$767
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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 12/266:00 amONT - KOA
1 stop13h 25mAlaska Airlines
Mon 12/2910:08 pmKOA - ONT
1 stop9h 42mAlaska Airlines
Deal found 12/25$808

Find 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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$316
(Kiwi.com)

One-way from

$152
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$397
Provider with most accurate pricing for Ontario-Kona Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Kona Intl flights.
Search Deals
From Ontario to Kona Intl
Search Deals
One-way flight from Ontario to Kona Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 28, 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 2/2

6:00 am-9:30 pm

1 stop17h 30m

Kona Intl

Fri 2/6

9:10 pm-3:08 pm

1 stop15h 58m

$329

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 1/26

6:00 am-2:44 pm

1 stop10h 44m

Kona Intl

Mon 2/2

11:59 am-10:28 pm

1 stop8h 29m

$331

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 2/24

12:02 pm-10:57 pm

1 stop12h 55m

Kona Intl

Wed 2/25

12:30 pm-10:15 pm

1 stop7h 45m

$331

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 4/23

7:30 am-6:55 pm

1 stop14h 25m

Kona Intl

Mon 5/4

8:55 pm-11:13 am

1 stop11h 18m

$335

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 4/21

7:30 am-6:55 pm

1 stop14h 25m

Kona Intl

Thu 4/30

8:55 pm-11:13 am

1 stop11h 18m

$335

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 4/23

10:39 am-7:52 pm

1 stop12h 13m

Kona Intl

Thu 4/30

10:36 am-11:48 pm

1 stop10h 12m

$335

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 4/15

10:33 am-5:31 pm

1 stop9h 58m

Kona Intl

Wed 4/22

8:00 am-10:32 pm

1 stop11h 32m

$335

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 4/22

6:00 am-6:55 pm

2 stops15h 55m

Kona Intl

Mon 5/4

8:55 pm-11:13 am

1 stop11h 18m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 4/7

6:00 am-6:38 pm

2 stops15h 38m

Kona Intl

Tue 4/14

8:55 pm-11:13 am

1 stop11h 18m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 3/4

6:00 am-6:30 pm

2 stops14h 30m

Kona Intl

Wed 3/11

9:55 pm-4:28 pm

2 stops15h 33m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 23 results
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Compare providers for flights from Ontario to Kailua-Kona

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Kailua-Kona in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Kailua-Kona flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Kailua-Kona flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Kailua-Kona flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Kailua-Kona flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Kailua-Kona flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 December 26, 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, May is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $149). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $251). 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 December 28, 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 77% 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 December 28, 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
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,552 reviews
Alaska Airlines
8.0
Very good
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Southwest
8.0
Very good
4,256 reviews
Alaska Airlines
8.0
Very good
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,017 reviews
Alaska Airlines
8.0
Very good
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,114 reviews
Alaska Airlines
8.0
Very good
11,552 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

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 14h 25m. Fly via Alaska Airlines 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 $154. Other airlines that can offer you cheap pricing are United Airlines, from $277, and Southwest, from $277. Delta is currently priced 66% 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 United Airlines ($123), Southwest ($155), and Alaska Airlines ($174).

  • 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, May is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $149). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $251). 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$220Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$277Average$467FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$277Average$535FlexibilityNo cancel feeOn-time63%
Hawaiian AirlinesCheapest$283Average$390FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$308Average$504FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$332Average$491FlexibilityNo cancel feeOn-time75%

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