HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$168+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Kailua-Kona to Ontario 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.

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 March 13, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 5/510:30 am
KOA
-
ONT
1 stop7h 40m
Multiple Airlines
Wed 5/610:39 am
ONT
-
KOA
1 stop12h 13m
Multiple Airlines
Deal found 3/12$366
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Fri 5/1511:04 pm
KOA
-
ONT
1 stop7h 37m
United Airlines
Mon 5/186:00 am
ONT
-
KOA
1 stop7h 47m
United Airlines
Deal found 3/11$372
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 4/2310:36 am
KOA
-
ONT
1 stop10h 12m
Alaska Airlines
Tue 7/72:09 pm
ONT
-
KOA
1 stop11h 01m
Alaska Airlines
Deal found 3/10$407
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:00 am
KOA
-
ONT
1 stop9h 00m
Southwest
Mon 5/187:00 am
ONT
-
KOA
1 stop8h 15m
Southwest
Deal found 3/10$412
This Delta deal was found by Cheapflights users on 3/8. 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 6/189:45 pm
KOA
-
ONT
1 stop12h 04m
Delta
Tue 7/147:00 am
ONT
-
KOA
1 stop13h 51m
Delta
Deal found 3/8$415
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Thu 4/2310:36 am
KOA
-
ONT
1 stop10h 12m
Alaska Airlines
Thu 4/3010:39 am
ONT
-
KOA
1 stop12h 13m
Alaska Airlines
Deal found 3/9$424
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 6/149:19 pm
KOA
-
ONT
1 stop10h 55m
Alaska Airlines
Tue 7/142:09 pm
ONT
-
KOA
1 stop11h 01m
Alaska Airlines
Deal found 3/8$441
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 6/149:19 pm
KOA
-
ONT
1 stop10h 55m
Alaska Airlines
Fri 7/172:09 pm
ONT
-
KOA
1 stop11h 01m
Alaska Airlines
Deal found 3/8$445
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 4/279:00 pm
KOA
-
ONT
1 stop21h 10m
Multiple Airlines
Mon 5/410:39 am
ONT
-
KOA
1 stop12h 13m
Multiple Airlines
Deal found 3/12$446

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$366
(Alaska Airlines)

One-way from

$168
(Alaska Airlines)

Popular in

June

Cheapest in

February

Average price

$423
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. 12% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 13, 2026.
Use the filters below to find and compare flights from Kailua-Kona to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 5/5

10:30 am-9:10 pm

1 stop7h 40m

Ontario

Wed 5/6

10:39 am-7:52 pm

1 stop12h 13m

$366

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/23

10:36 am-11:48 pm

1 stop10h 12m

Ontario

Thu 4/30

10:39 am-7:52 pm

1 stop12h 13m

$424

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/23

10:36 am-11:48 pm

1 stop10h 12m

Ontario

Tue 7/7

12:02 pm-7:08 pm

1 stop10h 06m

$441

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 4/27

9:00 pm-9:10 pm

1 stop21h 10m

Ontario

Mon 5/4

10:39 am-7:52 pm

1 stop12h 13m

$446

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 7/7

9:19 pm-11:14 am

1 stop10h 55m

Ontario

Mon 7/13

2:09 pm-10:10 pm

1 stop11h 01m

$451

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 6/15

9:19 pm-11:14 am

1 stop10h 55m

Ontario

Fri 7/17

2:09 pm-10:10 pm

1 stop11h 01m

$462
Cheapest one-way

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 7/7

9:19 pm-11:14 am

1 stop10h 55m

$193

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 5/20

9:25 pm-11:10 am

1 stop10h 45m

$212

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 8/17

9:19 pm-11:14 am

1 stop10h 55m

$222

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/16

10:48 pm-12:20 pm

1 stop10h 32m

$226

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 16 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Kailua-Kona-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Kailua-Kona-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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, October is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $159). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $246). 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 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 March 13, 2026.
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
8.0
Very good
4,318 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Southwest
8.0
Very good
4,318 reviews
Southwest
8.0
Very good
4,318 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

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 10h 12m. 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.

  • 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, October is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $159). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $246). 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.

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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$361FlexibilityNo cancel feeOn-time63%

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.