HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kailua-Kona

$164+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

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 November 6, 2025.

This Delta deal was found by Cheapflights users on 11/6. 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 12/45:49 pmONT - KOA
1 stop26h 32mDelta
Mon 12/158:43 pmKOA - ONT
1 stop12h 30mDelta
Deal found 11/6$322
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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 12/36:00 amONT - KOA
1 stop10h 40mAlaska Airlines
Tue 12/99:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 11/4$337
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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 12/36:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Wed 12/109:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 11/4$357
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/412:13 pmONT - KOA
1 stop11h 17mAlaska Airlines
Sun 12/79:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 11/6$367
This Delta deal was found by Cheapflights users on 11/6. 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 12/116:40 amONT - KOA
2 stops14h 50mDelta
Mon 12/158:43 pmKOA - ONT
1 stop12h 30mDelta
Deal found 11/6$371
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/1112:13 pmONT - KOA
1 stop11h 17mAlaska Airlines
Mon 12/159:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 11/6$380
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 12/912:13 pmONT - KOA
1 stop11h 17mAlaska Airlines
Sat 12/135:58 pmKOA - ONT
1 stop25h 45mAlaska Airlines
Deal found 11/4$384
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 12/412:13 pmONT - KOA
1 stop11h 17mAlaska Airlines
Thu 12/119:00 amKOA - ONT
1 stop12h 29mAlaska Airlines
Deal found 11/3$387

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$322
(Delta)

One-way from

$164
(Alaska Airlines)

Popular in

June

Cheapest in

April

Average price

$488
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 ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 6, 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

Thu 1/15

8:13 am-4:00 pm

1 stop9h 47m

Kona Intl

Tue 1/20

9:00 pm-10:28 pm

1 stop23h 28m

$329

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 1/22

8:13 am-4:00 pm

1 stop9h 47m

Kona Intl

Wed 1/28

9:10 pm-10:59 am

1 stop11h 49m

$333

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 12/8

12:13 pm-9:30 pm

1 stop11h 17m

Kona Intl

Mon 12/15

9:10 pm-11:19 am

1 stop12h 09m

$337

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 1/20

8:13 am-4:00 pm

1 stop9h 47m

Kona Intl

Wed 1/28

4:30 pm-10:28 pm

1 stop27h 58m

$349

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 1/15

8:13 am-4:00 pm

1 stop9h 47m

Kona Intl

Wed 1/21

9:10 pm-10:59 am

1 stop11h 49m

$353

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 1/20

7:30 am-6:47 pm

1 stop13h 17m

Kona Intl

Wed 1/28

9:42 pm-12:16 pm

2 stops12h 34m

$363

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 12/3

6:00 am-5:22 pm

1 stop13h 22m

Kona Intl

Wed 12/10

9:00 pm-11:19 am

2 stops12h 19m

$364

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Sun 1/11

8:13 am-4:00 pm

1 stop9h 47m

Kona Intl

Thu 1/15

8:36 am-10:28 pm

1 stop11h 52m

$378

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 12/9

6:00 am-5:22 pm

1 stop13h 22m

Kona Intl

Sat 12/13

7:50 pm-9:43 pm

1 stop23h 53m

$384

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 12/4

12:13 pm-9:30 pm

1 stop11h 17m

Kona Intl

Thu 12/11

9:00 am-11:29 pm

1 stop12h 29m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 18 results
1
2

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 November.
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 October 31, 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 November 6, 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 November 6, 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
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,243 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,240 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
8,004 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Hawaiian Airlines
7.8
Good
2,804 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
9,003 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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 9h 47m. Fly via Alaska Airlines to get the fastest option. The distance from Ontario to Kailua-Kona is about 2547 mi.

  • 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 $232. Other airlines that can offer you cheap pricing are Delta, from $233, and United Airlines, from $265. Hawaiian Airlines is currently priced 48% 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, 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Kailua-Kona

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Honolulu flights
San Francisco to Honolulu flights
Los Angeles to Kahului flights
San Francisco to Kahului flights
Ontario to Honolulu flights
Los Angeles to Lihue flights
San Diego to Honolulu flights
Los Angeles to Kailua-Kona flights
San Francisco to Lihue flights
San Francisco to Kailua-Kona flights
San Jose to Honolulu flights
Oakland to Honolulu flights
Las Vegas to Honolulu flights
Long Beach to Honolulu flights
Sacramento to Honolulu flights
Oakland to Kahului flights
San Diego to Kahului flights
San Jose to Kahului flights
Ontario to Kahului flights
Sacramento to Kahului flights
San Diego to Lihue flights
Burbank to Honolulu flights
Sacramento to Kailua-Kona flights
Santa Ana to Honolulu flights
Oakland to Lihue flights
San Diego to Kailua-Kona flights
Las Vegas to Kahului flights
Oakland to Kailua-Kona flights
San Jose to Kailua-Kona flights
Sacramento to Lihue flights
San Jose to Lihue flights
Ontario to Lihue flights
Santa Ana to Kahului flights
Las Vegas to Lihue flights
Long Beach to Kahului flights
San Francisco to Hilo flights
Las Vegas to Kailua-Kona flights
Fresno to Honolulu flights
Los Angeles to Hilo flights
Burbank to Kahului flights
Los Angeles to Hoolehua flights
Long Beach to Lihue flights
Santa Ana to Lihue flights
San Jose to Hilo flights
Oakland to Hilo flights
Reno to Honolulu flights
Reno to Lihue flights
Reno to Kahului flights
Santa Ana to Kailua-Kona flights

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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$232Average$390FlexibilityNo cancel feeOn-time85%
DeltaCheapest$233Average$370FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$265Average$403FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$277Average$529FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$308Average$504FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$332Average$496FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.