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$131+ Cheap flights from The Big Island to Ontario (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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Nov 4 — Nov 111
Tue 11/4
Tue 11/11
1 adult, Economy
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Cheap flight deals from The Big Island to Ontario

Keep the following information in mind while searching for The Big Island to Ontario flight deals. Data was last updated October 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$291
(Delta)

One-way from

$131
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$634
Provider with most accurate pricing for Hilo Intl-Los Angeles flight deals.
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From The Big Island to Ontario
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One-way flight from The Big Island to Ontario
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Highest demand for flights based on searches. 11% potential increase in price ($71 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from The Big Island to Ontario

Cheapest flights from The Big Island to Ontario
Explore the most affordable flight options available from The Big Island to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 5, 2025.

This Delta deal was found by Cheapflights users on 10/4. 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 12/48:43 pmKOA - ONT
1 stop12h 30mDelta
Mon 12/86:40 amONT - KOA
1 stop13h 40mDelta
Deal found 10/4$291
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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 11/67:14 amKOA - ONT
1 stop8h 00mAlaska Airlines
Wed 11/129:47 amONT - KOA
1 stop9h 35mAlaska Airlines
Deal found 10/4$367
This Alaska Airlines deal was found by Cheapflights users on 10/5. 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 11/199:20 pmKOA - ONT
1 stop11h 45mAlaska Airlines
Wed 11/265:00 amONT - KOA
1 stop19h 25mAlaska Airlines
Deal found 10/5$453
This Alaska Airlines deal was found by Cheapflights users on 10/5. 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.
Fri 12/191:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Sat 1/1011:53 amONT - KOA
1 stop11h 37mAlaska Airlines
Deal found 10/5$458
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Sat 12/2011:59 pmKOA - ONT
1 stop8h 02mUnited Airlines
Sun 1/116:00 amONT - KOA
1 stop8h 57mUnited Airlines
Deal found 10/5$461
This Alaska Airlines deal was found by Cheapflights users on 10/3. 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 10/209:53 amKOA - ONT
1 stop7h 44mAlaska Airlines
Wed 10/221:31 pmONT - KOA
1 stop11h 09mAlaska Airlines
Deal found 10/3$477
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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 12/211:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Wed 12/317:00 amONT - KOA
1 stop9h 45mAlaska Airlines
Deal found 10/4$521
This Alaska Airlines deal was found by Cheapflights users on 10/5. 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 10/148:44 amKOA - ONT
1 stop8h 53mAlaska Airlines
Thu 10/231:31 pmONT - KOA
1 stop11h 09mAlaska Airlines
Deal found 10/5$527
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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 11/187:14 amKOA - ONT
1 stop8h 00mAlaska Airlines
Tue 11/255:00 amONT - KOA
1 stop19h 25mAlaska Airlines
Deal found 10/4$534
This Alaska Airlines deal was found by Cheapflights users on 10/3. 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 12/211:05 pmKOA - ONT
1 stop8h 54mAlaska Airlines
Mon 12/298:00 amONT - KOA
1 stop25h 18mAlaska Airlines
Deal found 10/3$536
This Alaska Airlines deal was found by Cheapflights users on 10/3. 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.
Sat 10/186:00 amKOA - ONT
1 stop11h 37mAlaska Airlines
Wed 10/221:31 pmONT - KOA
1 stop11h 09mAlaska Airlines
Deal found 10/3$538
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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 12/410:56 amITO - ONT
1 stop7h 27mAlaska Airlines
Mon 12/87:00 amONT - ITO
1 stop8h 01mAlaska Airlines
Deal found 10/4$539

Cheapflights Fare Finder

 
Customize your flight search to find flights from The Big Island 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 October 5, 2025.
Use the filters below to find and compare flights from The Big Island to Ontario that are best for you.

Fly from

The Big Island

Fly to

Ontario

Route

Depart

Return

Price

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 12/4

8:43 pm-11:13 am

1 stop12h 30m

Ontario

Mon 12/8

6:40 am-6:20 pm

1 stop13h 40m

$291

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 11/6

7:14 am-5:14 pm

1 stop8h 00m

Ontario

Wed 11/12

9:47 am-5:22 pm

1 stop9h 35m

$367

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 11/19

9:20 pm-11:05 am

1 stop11h 45m

Ontario

Wed 11/26

5:00 am-10:25 pm

1 stop19h 25m

$453

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 12/19

1:05 pm-11:59 pm

1 stop8h 54m

Ontario

Sat 1/10

11:53 am-9:30 pm

1 stop11h 37m

$458

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sat 12/20

11:59 pm-10:01 am

1 stop8h 02m

Ontario

Sun 1/11

6:00 am-12:57 pm

1 stop8h 57m

$461

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sat 12/20

11:59 pm-10:01 am

1 stop8h 02m

Ontario

Sat 1/10

6:00 am-12:57 pm

1 stop8h 57m

$461

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Mon 10/20

9:53 am-8:37 pm

1 stop7h 44m

Ontario

Wed 10/22

1:31 pm-9:40 pm

1 stop11h 09m

$477

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sun 12/21

1:05 pm-11:59 pm

1 stop8h 54m

Ontario

Wed 12/31

7:00 am-2:45 pm

1 stop9h 45m

$521

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Fri 3/6

12:00 pm-9:55 pm

1 stop7h 55m

Ontario

Wed 3/11

6:00 am-3:23 pm

2 stops12h 23m

$534

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 11/18

7:14 am-5:14 pm

1 stop8h 00m

Ontario

Tue 11/25

5:00 am-10:25 pm

1 stop19h 25m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/5

Showing 1-10 of 38 results
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Best time to book a flight from The Big Island to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from The Big Island 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 The Big Island to Ontario

What is the cheapest month to book a flight from The Big Island to Ontario?

Currently, August is the cheapest month in which you can book a flight from The Big Island to Ontario (average of $246). Flying from The Big Island to Ontario in March is currently the most expensive (average of $327). 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 FUI to ONT?

Find hourly flight availability from The Big Island 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 October 5, 2025.

When flying from The Big Island to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 October 5, 2025.
Peruse reviews from past customers who have flown with Southwest from The Big Island to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,237 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 The Big Island to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from The Big Island?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from The Big Island to Ontario.

  • How long is the flight from The Big Island to Ontario?

    Departing from The Big Island to Ontario will take you 8h. The distance between The Big Island and Ontario is about 2547 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from The Big Island to Ontario that include hotel bookings?

    Yes. In addition to deals on The Big Island to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from The Big Island to Ontario?

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

  • Can I find deals for business class flights from The Big Island to Ontario?

    Yes. Cheapflights offers flight deals from The Big Island 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 The Big Island to Ontario?

    Currently, August is the cheapest month in which you can book a flight from The Big Island to Ontario (average of $246). Flying from The Big Island to Ontario in March is currently the most expensive (average of $327). 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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Alternative routes for The Big Island to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from The Big Island to Ontario

Discover the top airline that operate flights from The Big Island 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 October 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$477FlexibilityNo cancel feeOn-time63%

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