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$161+ Cheap flights from Kailua-Kona to Ontario (KOA - ONT)

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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Kailua-Kona to Ontario

Cheapest flights from Kailua-Kona to Ontario
Explore the most affordable flight options available from Kailua-Kona to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Delta deal was found by Cheapflights users on 12/11. 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 12/238:55 pmKOA - ONT
1 stop13h 34mDelta
Sun 1/46:00 amONT - KOA
1 stop11h 48mDelta
Deal found 12/11$513
This Delta deal was found by Cheapflights users on 12/11. 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.
Sat 12/208:55 pmKOA - ONT
1 stop13h 34mDelta
Sun 1/46:00 amONT - KOA
1 stop11h 48mDelta
Deal found 12/11$539
This Delta deal was found by Cheapflights users on 12/11. 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 12/238:55 pmKOA - ONT
1 stop13h 34mDelta
Thu 1/16:38 amONT - KOA
1 stop14h 57mDelta
Deal found 12/11$547
This Delta deal was found by Cheapflights users on 12/11. 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 12/238:55 pmKOA - ONT
1 stop13h 34mDelta
Wed 12/316:38 amONT - KOA
1 stop15h 04mDelta
Deal found 12/11$551
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2511:59 pmKOA - ONT
1 stop8h 02mUnited Airlines
Thu 1/18:11 amONT - KOA
1 stop8h 48mUnited Airlines
Deal found 12/11$554
This Delta deal was found by Cheapflights users on 12/11. 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 12/268:55 pmKOA - ONT
1 stop13h 34mDelta
Thu 1/16:38 amONT - KOA
1 stop14h 57mDelta
Deal found 12/11$573
This Delta deal was found by Cheapflights users on 12/11. 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.
Sat 12/208:55 pmKOA - ONT
1 stop13h 34mDelta
Tue 12/306:38 amONT - KOA
1 stop15h 04mDelta
Deal found 12/11$577
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/179:10 pmKOA - ONT
1 stop10h 40mAlaska Airlines
Wed 12/246:00 amONT - KOA
1 stop13h 25mAlaska Airlines
Deal found 12/9$592
This Delta deal was found by Cheapflights users on 12/11. 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 12/238:55 pmKOA - ONT
1 stop13h 34mDelta
Sat 1/36:38 amONT - KOA
1 stop14h 57mDelta
Deal found 12/11$602
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Thu 12/257:00 amONT - KOA
1 stop9h 45mAlaska Airlines
Deal found 12/10$629
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/2511:59 pmKOA - ONT
1 stop8h 02mUnited Airlines
Tue 12/306:00 amONT - KOA
1 stop8h 51mUnited Airlines
Deal found 12/10$651
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:55 pmKOA - ONT
1 stop7h 53mAmerican Airlines
Fri 1/29:53 amONT - KOA
1 stop10h 58mAmerican Airlines
Deal found 12/11$677

Find flight deals from Kailua-Kona to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Kailua-Kona (KOA) to Ontario (ONT). 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 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$300
(Alaska Airlines)

One-way from

$161
(Alaska Airlines)

Popular in

April

Cheapest in

August

Average price

$429
Provider with most accurate pricing for Kona Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kona Intl-Ontario flights.
Search Deals
From Kona Intl to Ontario
Search Deals
One-way flight from Kona Intl to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 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 Kailua-Kona to Ontario 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 12, 2025.
Use the filters below to find and compare flights from Kailua-Kona to Ontario that are best for you.

Fly from

Kailua-Kona

Fly to

Ontario

Route

Depart

Return

Price

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 1/21

9:10 pm-3:08 pm

1 stop15h 58m

Ontario

Fri 1/30

4:03 pm-9:30 pm

1 stop31h 27m

$303

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 1/13

12:51 pm-10:28 pm

1 stop7h 37m

Ontario

Wed 1/28

8:13 am-4:00 pm

1 stop9h 47m

$322

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 1/26

9:10 pm-1:06 pm

2 stops13h 56m

Ontario

Wed 1/28

8:13 am-4:00 pm

1 stop9h 47m

$359

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 3/4

8:45 am-10:44 pm

1 stop11h 59m

Ontario

Thu 3/12

6:14 am-4:13 pm

1 stop12h 59m

$376

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 1/26

3:51 pm-10:28 pm

1 stop28h 37m

Ontario

Wed 1/28

8:13 am-4:00 pm

1 stop9h 47m

$379

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 1/30

7:30 am-10:28 pm

1 stop12h 58m

Ontario

Mon 2/2

11:53 am-9:30 pm

1 stop11h 37m

$426

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 2/11

6:00 am-10:28 pm

1 stop14h 28m

Ontario

Thu 2/19

6:14 am-5:13 pm

1 stop12h 59m

$469

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sun 4/19

9:00 pm-10:53 am

1 stop10h 53m

Ontario

Sun 4/26

6:00 am-3:32 pm

1 stop12h 32m

$484

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 12/24

9:55 pm-12:32 pm

1 stop12h 37m

Ontario

Sun 1/4

6:00 am-3:48 pm

1 stop11h 48m

$513

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 12/25

8:55 pm-12:29 pm

1 stop13h 34m

Ontario

Sun 1/4

6:00 am-3:48 pm

1 stop11h 48m

$513

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 22 results
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Compare providers for flights from Kailua-Kona to Ontario

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 Kailua-Kona to Ontario in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 Kailua-Kona-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kailua-Kona-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Kailua-Kona-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Kailua-Kona-Ontario 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 Kailua-Kona-Ontario 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 Kailua-Kona to Ontario

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

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

Currently, May is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $83). Flying from Kailua-Kona to Ontario in June is currently the most expensive (average of $216). 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 KOA to ONT?

Find hourly flight availability from Kailua-Kona to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from Kailua-Kona to Ontario is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 44% on airfare.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown Southwest from Kailua-Kona to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Kailua-Kona to Ontario. 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 Kailua-Kona to Ontario?

    Departing from Kailua-Kona to Ontario will take you 15h 58m. Airlines will cover a distance of 2547 mi.

  • What is the cheapest airline to fly from Kailua-Kona to Ontario round-trip?

    Our cheapest airline available from Kailua-Kona to Ontario is Southwest. Our recent data shows that you can find tickets from as low as $319 on this airline. You may be able to fly from Kailua-Kona to Ontario for 32% less than the average price by searching for this airline.

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

    One-way options have recently been found by users for as low as $138 on American Airlines. Other airlines that offer cheap prices include Delta from $141 and Southwest from $180 one-way.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $83). Flying from Kailua-Kona to Ontario in June is currently the most expensive (average of $216). 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 airline flying from Kailua-Kona to Ontario

Discover the top airline that operate flights from Kailua-Kona to Ontario. 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$485FlexibilityNo cancel feeOn-time63%

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