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Kailua-Kona

$162+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
1 adult, Economy
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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 enero 29, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/38:41 am
ONT
-
KOA
1 stop13h 46m
Multiple Airlines
mié. 3/46:00 am
KOA
-
ONT
1 stop14h 15m
Multiple Airlines
Deal found 1/27$318
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
mié. 2/258:41 am
ONT
-
KOA
1 stop8h 28m
Multiple Airlines
lun. 3/28:45 am
KOA
-
ONT
1 stop11h 30m
Multiple Airlines
Deal found 1/26$325
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/128:30 am
ONT
-
KOA
1 stop24h 55m
Multiple Airlines
mar. 5/1911:56 am
KOA
-
ONT
1 stop9h 00m
Multiple Airlines
Deal found 1/27$328
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/2612:02 pm
ONT
-
KOA
1 stop12h 55m
Multiple Airlines
mié. 3/43:37 pm
KOA
-
ONT
1 stop28h 38m
Multiple Airlines
Deal found 1/28$329
This Alaska Airlines deal was found by Cheapflights users on 1/28. 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.
jue. 2/2612:02 pm
ONT
-
KOA
1 stop12h 55m
Multiple Airlines
jue. 3/57:09 am
KOA
-
ONT
1 stop13h 06m
Multiple Airlines
Deal found 1/28$330
This Alaska Airlines deal was found by Cheapflights users on 1/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2810:39 am
ONT
-
KOA
1 stop12h 13m
Alaska Airlines
mar. 5/510:36 am
KOA
-
ONT
1 stop10h 12m
Alaska Airlines
Deal found 1/29$332
This Delta deal was found by Cheapflights users on 1/27. 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.
jue. 3/56:00 am
ONT
-
KOA
1 stop11h 51m
Delta
mar. 3/107:40 pm
KOA
-
ONT
1 stop13h 43m
Delta
Deal found 1/27$334
This Delta deal was found by Cheapflights users on 1/27. 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.
jue. 3/56:00 am
ONT
-
KOA
1 stop11h 51m
Delta
jue. 3/127:40 pm
KOA
-
ONT
1 stop13h 43m
Delta
Deal found 1/27$336
This Delta deal was found by Cheapflights users on 1/27. 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.
mar. 4/2811:53 am
ONT
-
KOA
1 stop10h 10m
Delta
mié. 5/68:50 pm
KOA
-
ONT
2 stops16h 24m
Delta
Deal found 1/27$338
This Delta deal was found by Cheapflights users on 1/27. 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.
mar. 3/36:00 am
ONT
-
KOA
2 stops15h 39m
Delta
jue. 3/127:40 pm
KOA
-
ONT
1 stop13h 43m
Delta
Deal found 1/27$340
This Delta deal was found by Cheapflights users on 1/27. 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.
jue. 3/56:00 am
ONT
-
KOA
2 stops15h 39m
Delta
lun. 3/97:40 pm
KOA
-
ONT
1 stop13h 43m
Delta
Deal found 1/27$342
This Delta deal was found by Cheapflights users on 1/27. 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.
dom. 4/266:00 am
ONT
-
KOA
2 stops16h 03m
Delta
vie. 5/89:45 pm
KOA
-
ONT
2 stops15h 29m
Delta
Deal found 1/27$343

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 enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Alaska Airlines)

One-way from

$162
(Alaska Airlines)

Popular in

June

Cheapest in

January

Average price

$370
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. 16% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 enero 29, 2026.
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

mar. 4/28

7:00 am-7:03 pm

1 stop15h 03m

Kona Intl

jue. 5/7

9:45 pm-12:49 pm

1 stop12h 04m

$332

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

jue. 5/7

10:39 am-7:52 pm

1 stop12h 13m

Kona Intl

mar. 5/12

8:00 am-10:32 pm

1 stop11h 32m

$334

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

mié. 4/29

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

mar. 5/5

8:50 pm-11:13 am

1 stop11h 23m

$338

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

lun. 4/27

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

jue. 5/7

9:45 pm-12:49 pm

1 stop12h 04m

$338

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

mié. 4/29

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

lun. 5/4

8:50 pm-1:39 pm

1 stop13h 49m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

mié. 3/4

6:00 am-7:39 pm

2 stops15h 39m

Kona Intl

lun. 3/23

7:40 pm-12:23 pm

1 stop13h 43m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

mar. 2/17

6:00 am-7:39 pm

2 stops15h 39m

Kona Intl

lun. 2/23

8:55 pm-12:07 pm

1 stop13h 12m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

lun. 3/2

6:00 am-7:39 pm

2 stops15h 39m

Kona Intl

mar. 3/24

7:40 pm-12:23 pm

1 stop13h 43m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

mar. 3/3

6:00 am-7:39 pm

2 stops15h 39m

Kona Intl

lun. 3/23

7:40 pm-12:23 pm

1 stop13h 43m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

dom. 4/26

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

vie. 5/8

9:45 pm-4:14 pm

2 stops15h 29m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Kailua-Kona flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 23, 2026.

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.

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 enero 29, 2026.
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
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,807 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,128 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,205 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 12h 13m. Fly via Delta or Alaska Airlines 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 67% 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 Southwest ($155), Alaska Airlines ($174), and United Airlines ($198).

  • 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 5 airlines flying from Ontario to Kailua-Kona

Discover the top 5 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 enero 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$154Average$364FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$277Average$452FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$277Average$528FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$308Average$504FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$337Average$499FlexibilityNo cancel feeOn-time75%

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