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$164+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Jan 6 — Jan 131
Tue 1/6
Tue 1/13
1 adult, Economy
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Cheap 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 December 7, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/6. 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 12/79:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Thu 12/116:00 amONT - KOA
1 stop10h 40mAlaska Airlines
Deal found 12/6$537
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Fri 12/129:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Mon 12/156:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Deal found 12/6$567
This United Airlines deal was found by Cheapflights users on 12/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:59 pmKOA - ONT
1 stop8h 00mUnited Airlines
Wed 12/316:00 amONT - KOA
1 stop8h 51mUnited Airlines
Deal found 12/7$576
This Southwest deal was found by Cheapflights users on 12/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:00 amKOA - ONT
1 stop8h 35mSouthwest
Fri 1/25:20 amONT - KOA
1 stop9h 50mSouthwest
Deal found 12/7$583
This Delta deal was found by Cheapflights users on 12/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:55 pmKOA - ONT
1 stop12h 37mDelta
Fri 1/26:38 amONT - KOA
1 stop14h 57mDelta
Deal found 12/6$593
This United Airlines deal was found by Cheapflights users on 12/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:40 pmKOA - ONT
1 stop8h 01mUnited Airlines
Tue 12/306:00 amONT - KOA
1 stop8h 51mUnited Airlines
Deal found 12/7$602
This Alaska Airlines deal was found by Cheapflights users on 12/7. 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.
Sat 12/139:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Mon 12/156:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Deal found 12/7$627
This Alaska Airlines deal was found by Cheapflights users on 12/7. 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.
Wed 12/311:07 pmKOA - ONT
1 stop7h 01mAlaska Airlines
Sun 1/47:00 amONT - KOA
1 stop9h 45mAlaska Airlines
Deal found 12/7$733
This Southwest deal was found by Cheapflights users on 12/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:15 pmKOA - ONT
1 stop12h 55mSouthwest
Sat 12/275:40 amONT - KOA
1 stop10h 00mSouthwest
Deal found 12/6$737
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Tue 12/238:29 pmITO - ONT
1 stop23h 39mAlaska Airlines
Tue 12/308:00 amONT - ITO
1 stop15h 15mAlaska Airlines
Deal found 12/6$762

Find 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 December 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$301
(Alaska Airlines)

One-way from

$142
(Alaska Airlines)

Popular in

October

Cheapest in

August

Average price

$588
Provider with most accurate pricing for Hilo Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Hilo Intl-Los Angeles flights.
Search Deals
From The Big Island to Ontario
Search Deals
One-way flight from The Big Island to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($47 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 December 2025
Search Deals

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 December 7, 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

Mon 1/26

12:51 pm-10:28 pm

1 stop7h 37m

Ontario

Wed 1/28

8:13 am-4:00 pm

1 stop9h 47m

$328

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 3/3

6:00 am-10:44 pm

2 stops14h 44m

Ontario

Wed 3/4

7:00 am-6:41 pm

2 stops13h 41m

$421

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 2/10

12:09 pm-10:28 pm

1 stop8h 19m

Ontario

Wed 2/11

8:13 am-4:13 pm

1 stop10h 00m

$489

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sat 2/28

9:05 pm-11:08 am

1 stop12h 03m

Ontario

Sat 3/7

8:41 am-3:53 pm

1 stop9h 12m

$502

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 12/30

10:00 am-8:35 pm

1 stop8h 35m

Ontario

Fri 1/2

5:20 am-1:10 pm

1 stop9h 50m

$583

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Tue 12/30

9:55 pm-12:32 pm

1 stop12h 37m

Ontario

Fri 1/2

6:38 am-7:35 pm

1 stop14h 57m

$593

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 3/13

9:17 pm-11:08 am

1 stop10h 51m

Ontario

Fri 3/20

11:30 am-9:41 pm

1 stop13h 11m

$704

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 12/23

8:29 pm-10:08 pm

1 stop23h 39m

Ontario

Tue 12/30

8:00 am-9:15 pm

1 stop15h 15m

$762

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Mon 1/5

8:29 pm-10:08 pm

1 stop23h 39m

Ontario

Mon 1/12

8:13 am-2:32 pm

1 stop8h 19m

$867

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 1/14

12:09 pm-10:28 pm

1 stop8h 19m

Ontario

Wed 1/21

8:13 am-4:13 pm

1 stop10h 00m

$1,898

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 28 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, May is the cheapest month in which you can book a flight from The Big Island to Ontario (average of $83). Flying from The Big Island to Ontario in June is currently the most expensive (average of $216). 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 December 7, 2025.

It’s typically best to fly out from The Big Island to Ontario in the evening. Doing so could potentially save you 44% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 December 7, 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
4,252 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

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
4,252 reviews
Southwest
8.0
Very good
4,252 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

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 7h 37m. The distance between The Big Island and Ontario is about 2547 mi.

  • What are the cheapest airlines to fly from The Big Island to Ontario one-way?

    $138 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $141 and $180, respectively.

  • 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, May is the cheapest month in which you can book a flight from The Big Island to Ontario (average of $83). Flying from The Big Island to Ontario in June is currently the most expensive (average of $216). 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 December 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$319Average$485FlexibilityNo cancel feeOn-time63%

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