HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$142+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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

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 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$302
(Delta)

One-way from

$142
(Delta)

Popular in

December

Cheapest in

August

Average price

$357
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. 5% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find 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 26, 2025.

This Delta deal was found by Cheapflights users on 3/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/269:45 pmKOA - ONT
1 stop10h 08mDelta
Sat 9/67:00 amONT - KOA
1 stop13h 38mDelta
Deal found 3/24$302
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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.
Tue 10/710:00 pmKOA - ONT
1 stop9h 39mAlaska Airlines
Tue 10/216:00 amONT - KOA
1 stop12h 14mAlaska Airlines
Deal found 3/24$369
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/248:30 pmKOA - ONT
1 stop8h 45mSouthwest
Sun 4/277:00 amONT - KOA
1 stop8h 10mSouthwest
Deal found 3/24$385
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:10 pmKOA - ONT
1 stop8h 46mAmerican Airlines
Tue 5/137:25 pmONT - KOA
1 stop22h 12mAmerican Airlines
Deal found 3/25$404
This United Airlines deal was found by Cheapflights users on 3/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1611:04 pmKOA - ONT
1 stop10h 20mUnited Airlines
Sun 5/251:36 pmONT - KOA
1 stop8h 55mUnited Airlines
Deal found 3/25$462
This Hawaiian Airlines deal was found by Cheapflights users on 3/24. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/97:00 amKOA - ONT
1 stop11h 50mHawaiian Airlines
Tue 4/159:45 amONT - KOA
1 stop11h 41mHawaiian Airlines
Deal found 3/24$597

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 26, 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

Tue 8/26

9:45 pm-10:53 am

1 stop10h 08m

Ontario

Sat 9/6

7:00 am-5:38 pm

1 stop13h 38m

$302

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/24

8:30 pm-8:15 am

1 stop8h 45m

Ontario

Sun 4/27

7:00 am-12:10 pm

1 stop8h 10m

$385

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 8/27

8:07 am-9:10 pm

1 stop10h 03m

Ontario

Sun 9/7

6:00 am-3:24 pm

1 stop12h 24m

$393

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 5/12

9:10 pm-8:56 am

1 stop8h 46m

Ontario

Tue 5/13

7:25 pm-2:37 pm

1 stop22h 12m

$404

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 5/16

11:04 pm-12:24 pm

1 stop10h 20m

Ontario

Sun 5/25

1:36 pm-7:31 pm

1 stop8h 55m

$462

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 4/9

7:00 am-9:50 pm

1 stop11h 50m

Ontario

Tue 4/15

9:45 am-6:26 pm

1 stop11h 41m

$597

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 8/19

9:45 pm-10:53 am

1 stop10h 08m

$142

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 5/28

10:50 pm-12:14 pm

1 stop10h 24m

$189

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/24

9:16 pm-8:59 am

1 stop8h 43m

$191

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 8/25

8:07 am-9:10 pm

1 stop10h 03m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 13 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice 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 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, August is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $246). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $326). 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 March 26, 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 45% on airfare.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 26, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Kailua-Kona to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,331 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

  • What are the cheapest airlines flying from Kailua-Kona to Ontario round-trip?

    Our cheapest airline available from Kailua-Kona to Ontario is Delta. Our recent data shows that you can find tickets from as low as $302 on this airline. Additional options worth looking into are Southwest and Alaska Airlines, starting at $385 and $393 round-trip. You may be able to fly from Kailua-Kona to Ontario for 31% less than the average price by searching for these airlines.

  • 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 $142 on Delta. Other airlines that offer cheap prices include United Airlines from $189 and American Airlines from $191 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, August is the cheapest month in which you can book a flight from Kailua-Kona to Ontario (average of $246). Flying from Kailua-Kona to Ontario in March is currently the most expensive (average of $326). 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 Kailua-Kona to Ontario

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

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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$365Average$436FlexibilityNo 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.