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

$144+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
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.

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 February 27, 2026.

This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:00 am
ONT
-
KOA
1 stop15h 03m
Delta
Thu 4/238:50 pm
KOA
-
ONT
1 stop11h 23m
Delta
Deal found 2/25$284
This Alaska Airlines deal was found by Cheapflights users on 2/25. 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.
Tue 5/510:39 am
ONT
-
KOA
1 stop12h 13m
Alaska Airlines
Tue 5/1210:36 am
KOA
-
ONT
1 stop10h 12m
Alaska Airlines
Deal found 2/25$296
This Delta deal was found by Cheapflights users on 2/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
ONT
-
KOA
2 stops16h 03m
Delta
Thu 5/78:55 pm
KOA
-
ONT
2 stops12h 24m
Delta
Deal found 2/26$307
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:00 am
ONT
-
KOA
2 stops16h 03m
Delta
Thu 4/238:50 pm
KOA
-
ONT
1 stop11h 23m
Delta
Deal found 2/25$315
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Tue 3/1712:02 pm
ONT
-
KOA
1 stop13h 03m
Multiple Airlines
Tue 3/2412:17 pm
KOA
-
ONT
1 stop7h 42m
Multiple Airlines
Deal found 2/23$317
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:00 am
ONT
-
KOA
2 stops16h 03m
Delta
Wed 4/228:50 pm
KOA
-
ONT
2 stops23h 54m
Delta
Deal found 2/25$318
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:00 am
ONT
-
KOA
1 stop15h 03m
Delta
Wed 4/228:50 pm
KOA
-
ONT
2 stops23h 54m
Delta
Deal found 2/25$323
This Alaska Airlines deal was found by Cheapflights users on 2/26. 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.
Thu 4/98:32 am
ONT
-
KOA
1 stop10h 26m
Multiple Airlines
Thu 4/168:51 am
KOA
-
ONT
1 stop11h 08m
Multiple Airlines
Deal found 2/26$325
This Alaska Airlines deal was found by Cheapflights users on 2/24. 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 4/1610:33 am
ONT
-
KOA
1 stop9h 58m
Multiple Airlines
Thu 4/237:05 am
KOA
-
ONT
1 stop11h 05m
Multiple Airlines
Deal found 2/24$330

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 February 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$284
(Delta)

One-way from

$144
(Alaska Airlines)

Popular in

June

Cheapest in

January

Average price

$582
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. 14% potential increase in price ($82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 27, 2026.
Use the filters below to find and compare flights from Ontario to Kailua-Kona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 5/5

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

Thu 5/7

8:55 pm-11:12 am

1 stop11h 17m

$340

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Sat 4/18

6:00 am-7:03 pm

2 stops16h 03m

Kona Intl

Thu 4/23

8:50 pm-12:14 pm

2 stops36h 24m

$384

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 4/30

6:00 am-10:47 am

1 stop7h 47m

Kona Intl

Mon 5/4

11:04 pm-9:41 am

1 stop7h 37m

$396

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 5/19

6:00 am-10:47 am

1 stop7h 47m

Kona Intl

Wed 5/27

10:50 pm-12:12 pm

1 stop10h 22m

$421

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 3/23

1:20 pm-6:38 pm

2 stops32h 18m

Kona Intl

Mon 3/30

8:55 pm-11:51 pm

2 stops23h 56m

$432

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Mon 4/13

6:00 am-10:47 am

1 stop7h 47m

Kona Intl

Mon 4/20

10:48 pm-12:20 pm

1 stop10h 32m

$434

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Sun 4/5

6:00 am-6:38 pm

2 stops15h 38m

Kona Intl

Tue 4/14

8:50 pm-1:39 pm

1 stop13h 49m

$455

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 3/24

6:00 am-6:38 pm

1 stop15h 38m

Kona Intl

Mon 3/30

8:55 pm-11:51 pm

2 stops23h 56m

$516

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 5/12

12:30 pm-9:25 pm

2 stops11h 55m

Kona Intl

Sat 5/16

6:05 am-7:10 pm

2 stops10h 05m

$518

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Thu 5/7

1:30 pm-7:50 pm

1 stop9h 20m

Kona Intl

Mon 5/11

11:04 pm-9:41 am

1 stop7h 37m

$550

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/25

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 February.
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 February 20, 2026.

To ensure you get the cheapest price possible for a flight from Ontario to Kailua-Kona, you should look to book at least 65 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, December is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $167). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $253). 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 February 27, 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
11,965 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Comfort

7.8

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
11,965 reviews
Alaska Airlines
8.0
Very good
11,965 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Comfort

7.8

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
4,301 reviews
Alaska Airlines
8.0
Very good
11,965 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Comfort

7.8

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
8,242 reviews
Alaska Airlines
8.0
Very good
11,965 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Comfort

7.8

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
9,351 reviews
Alaska Airlines
8.0
Very good
11,965 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Comfort

7.8

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 7h 47m. Fly via Delta or United 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 Alaska Airlines, from $317. Delta is currently priced 69% 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, December is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $167). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $253). 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 4 airlines flying from Ontario to Kailua-Kona

Discover the top 4 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 February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$154Average$364FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$277Average$464FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$317Average$508FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$381Average$559FlexibilityNo 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.
Site
©2026 Cheapflights