$151+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Jul 11 — Jul 181
Round-trip
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
Best
Last-minute
One-way
Cheapest flights from Ontario to Kailua-KonaExplore 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 June 11, 2026.
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 June 11, 2026.
This Delta deal was found by Cheapflights users on 6/8. 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.
Sun 11/17:00 am
ONT
- KOA
1 stop13h 54m
Delta
Thu 11/1210:45 pm
KOA
- ONT
1 stop10h 31m
Delta
Deal found 6/8![Delta logo]()
$302
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
ONT
- KOA
1 stop13h 54m
Delta
Thu 11/59:45 pm
KOA
- ONT
2 stops16h 27m
Delta
Deal found 6/9![Delta logo]()
$308
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:00 am
ONT
- KOA
2 stops14h 54m
Delta
Wed 11/49:45 pm
KOA
- ONT
2 stops16h 27m
Delta
Deal found 6/9![Delta logo]()
$313
This Delta deal was found by Cheapflights users on 6/8. 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.
Wed 11/116:00 am
ONT
- KOA
1 stop11h 45m
Delta
Mon 11/1610:45 pm
KOA
- ONT
1 stop10h 31m
Delta
Deal found 6/8![Delta logo]()
$323
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:20 am
ONT
- KOA
1 stop14h 15m
Delta
Thu 8/68:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 6/8. 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.
Wed 9/166:20 am
ONT
- KOA
1 stop14h 11m
Delta
Wed 9/239:55 pm
KOA
- ONT
2 stops11h 15m
Delta
Deal found 6/8![Delta logo]()
$350
This Southwest deal was found by Cheapflights users on 6/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:10 am
ONT
- KOA
1 stop8h 50m
Southwest
Wed 9/96:05 am
KOA
- ONT
1 stop11h 05m
Southwest
Deal found 6/9![Southwest logo]()
$359
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:20 am
ONT
- KOA
1 stop14h 15m
Delta
Sun 8/168:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$363
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:20 am
ONT
- KOA
1 stop14h 15m
Delta
Wed 8/58:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$364
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:20 am
ONT
- KOA
1 stop14h 15m
Delta
Wed 8/198:42 pm
KOA
- ONT
1 stop23h 03m
Delta
Deal found 6/10![Delta logo]()
$366
Best flights from Ontario to Kailua-KonaDiscover carefully curated flight deals from Ontario to Kailua-Kona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
Discover carefully curated flight deals from Ontario to Kailua-Kona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:20 am
ONT
- KOA
1 stop14h 15m
Delta
Tue 8/188:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 8/246:00 am
ONT
- KOA
1 stop9h 48m
United Airlines
Wed 8/2611:05 pm
KOA
- ONT
1 stop10h 07m
United Airlines
Deal found 6/10![United Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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 8/32:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Tue 8/119:19 pm
KOA
- ONT
1 stop10h 55m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 10/197:00 am
ONT
- KOA
1 stop7h 46m
Multiple Airlines
Tue 10/2711:47 am
KOA
- ONT
1 stop9h 06m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$485
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:20 am
ONT
- KOA
1 stop14h 15m
Delta
Mon 8/178:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:00 am
ONT
- KOA
1 stop11h 45m
Delta
Wed 12/910:45 pm
KOA
- ONT
1 stop10h 31m
Delta
Deal found 6/10![Delta logo]()
$385
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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.
Sun 8/912:08 pm
ONT
- KOA
1 stop9h 57m
Alaska Airlines
Wed 8/129:19 pm
KOA
- ONT
1 stop10h 55m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$476
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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.
Sun 8/912:08 pm
ONT
- KOA
1 stop9h 57m
Alaska Airlines
Tue 8/188:03 am
KOA
- ONT
1 stop12h 08m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$476
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:20 am
ONT
- KOA
1 stop14h 15m
Delta
Sun 8/168:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$439
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:20 am
ONT
- KOA
1 stop14h 15m
Delta
Thu 8/68:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$440
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 7/272:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Mon 8/39:19 pm
KOA
- ONT
1 stop10h 55m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$489
Last-minute flights from Ontario to Kailua-KonaDiscover last-minute flight deals from Ontario to Kailua-Kona. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Kailua-Kona. Data last updated June 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 7/141:50 pm
ONT
- KOA
1 stop10h 55m
United Airlines
Thu 7/1610:50 pm
KOA
- ONT
1 stop10h 22m
United Airlines
Deal found 6/10![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:20 am
ONT
- KOA
1 stop14h 15m
Delta
Wed 8/58:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$378
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:20 am
ONT
- KOA
1 stop14h 15m
Delta
Tue 8/48:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$405
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/272:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Wed 8/59:19 pm
KOA
- ONT
1 stop10h 55m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$437
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 7/272:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Thu 8/69:19 pm
KOA
- ONT
1 stop10h 55m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:20 am
ONT
- KOA
1 stop14h 15m
Delta
Wed 8/58:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$413
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:10 pm
ONT
- KOA
2 stops27h 25m
Delta
Thu 8/68:42 pm
KOA
- ONT
2 stops16h 42m
Delta
Deal found 6/10![Delta logo]()
$470
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/296:20 am
ONT
- KOA
1 stop14h 15m
Delta
Wed 8/58:42 pm
KOA
- ONT
1 stop11h 34m
Delta
Deal found 6/10![Delta logo]()
$414
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 7/302:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Wed 8/128:03 am
KOA
- ONT
1 stop12h 08m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$463
One-way flights from Ontario to Kailua-KonaSearch for one-way flight options from Ontario to Kailua-Kona. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
Search for one-way flight options from Ontario to Kailua-Kona. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:20 am
ONT
- KOA
1 stop14h 15m
Delta
Deal found 6/9![Delta logo]()
$151
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:20 am
ONT
- KOA
1 stop14h 15m
Delta
Deal found 6/9![Delta logo]()
$172
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
ONT
- KOA
2 stops14h 35m
Delta
Deal found 6/9![Delta logo]()
$178
This Priceline deal was found by Cheapflights users on 6/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:00 am
ONT
- KOA
1 stop17h 50m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$197
This Priceline deal was found by Cheapflights users on 6/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:11 am
ONT
- KOA
1 stop15h 39m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$200
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/42:05 pm
ONT
- KOA
1 stop11h 05m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$201
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 am
ONT
- KOA
1 stop29h 16m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$203
This Priceline deal was found by Cheapflights users on 6/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:12 pm
ONT
- KOA
1 stop10h 15m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$204
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/91:50 pm
ONT
- KOA
1 stop8h 41m
United Airlines
Deal found 6/9![United Airlines logo]()
$206
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:32 pm
ONT
- KOA
1 stop20h 23m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$210
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:20 am
ONT
- KOA
1 stop14h 15m
Delta
Deal found 6/9![Delta logo]()
$212
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 June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $302 (Delta) |
One-way from | $151 (Delta) |
Popular in | June |
Cheapest in | January |
Average price | $603 |
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 June 11, 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
Cheapest round-trip
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Wed 8/5
6:20 am-5:35 pm
1 stop14h 15m
Kona Intl
Tue 8/18
8:42 pm-4:24 pm
2 stops16h 42m
$369
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Wed 8/5
6:20 am-5:35 pm
1 stop14h 15m
Kona Intl
Mon 8/17
8:42 pm-4:24 pm
2 stops16h 42m
$369
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Thu 12/3
6:00 am-3:45 pm
1 stop11h 45m
Kona Intl
Wed 12/9
10:45 pm-11:16 am
1 stop10h 31m
$385
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Mon 8/24
6:00 am-12:48 pm
1 stop9h 48m
Kona Intl
Wed 8/26
11:05 pm-12:12 pm
1 stop10h 07m
$412
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Mon 8/3
6:20 am-5:35 pm
1 stop14h 15m
Kona Intl
Sun 8/16
8:42 pm-11:16 am
1 stop11h 34m
$439
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Tue 7/28
6:20 am-5:35 pm
1 stop14h 15m
Kona Intl
Thu 8/6
8:42 pm-4:24 pm
2 stops16h 42m
$440
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Mon 8/3
2:05 pm-10:10 pm
1 stop11h 05m
Kona Intl
Tue 8/11
9:19 pm-11:14 am
1 stop10h 55m
$451
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Sun 8/9
12:08 pm-7:05 pm
1 stop9h 57m
Kona Intl
Wed 8/12
9:19 pm-11:14 am
1 stop10h 55m
$476
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Sun 8/9
12:08 pm-7:05 pm
1 stop9h 57m
Kona Intl
Tue 8/18
8:03 am-11:11 pm
1 stop12h 08m
$476
Quickest round-trip
OntarioKailua-Kona
ONT - KOA
ONTKOA
Ontario
Mon 10/19
7:00 am-11:46 am
1 stop7h 46m
Kona Intl
Tue 10/27
11:47 am-11:53 pm
1 stop9h 06m
$485
Showing 1-10 of 20 resultsSorted by cheapest first
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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.
ONT-KOA
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
Prices
More
What is the cheapest month to book a flight from Ontario to Kailua-Kona?
Currently, January is the cheapest month in which you can book a flight from Ontario to Kailua-Kona (average of $369). Flying from Ontario to Kailua-Kona in June is currently the most expensive (average of $603). 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.
How much does it cost to fly round-trip from Ontario to Kailua-Kona?
What’s the top layover airport for flights from Ontario to Kailua-Kona?
Share of 1-stop round-trip flights from Ontario to Kailua-Kona chosen by Cheapflights users in the past 12 months, using the same layover each way.
San Francisco (SFO) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Kailua-Kona on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Kailua-Kona?
Average round-trip fare for 1-stop flights from Ontario to Kailua-Kona, chosen by Cheapflights users in the past 12 months, with the same layover each way.
San Francisco (SFO) is the most affordable 1-stop option, with an average round-trip price of $477.
What’s the fastest layover option from Ontario to Kailua-Kona?
Shortest average travel time for 1-stop one-way flights from Ontario to Kailua-Kona, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 7h 47m.
Which airport typically offers the quickest layover for flights from Ontario to Kailua-Kona?
Average layover duration for 1-stop one-way flights from Ontario to Kailua-Kona, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 0h 50m.
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 June 11, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Southwest, andDelta 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.
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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.
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
Complete your trip
Flights by cabin class
Kailua-Kona flight routes
Other flight options
Other flights from Ontario
Popular flights
Alternative routes for Ontario to Kailua-Kona
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Kailua-Kona by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Kailua-Kona by cabin class
Find flights from Ontario to Kailua-Kona, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Kailua-Kona
Explore flights to Kailua-Kona departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 11, 2026.
Ontario and Kailua-Kona flights
Browse other Ontario and Kailua-Kona flight options. Last updated on June 11, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on June 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$319 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$309 | Average$491 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$335 | Average$453 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$503 | FlexibilityNo cancel fee | On-time63% |