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$176+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
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 June 18, 2025.

Round-trip from

$352
(Alaska Airlines)

One-way from

$176
(Alaska Airlines)

Popular in

July

Cheapest in

November

Average price

$654
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. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 18, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/17. 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 10/306:00 amKOA - ONT
1 stop8h 14mAlaska Airlines
Tue 11/49:45 amONT - KOA
1 stop10h 42mAlaska Airlines
Deal found 6/17$352
This Delta deal was found by Cheapflights users on 6/18. 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 12/169:45 pmKOA - ONT
1 stop11h 05mDelta
Sun 1/116:00 amONT - KOA
1 stop10h 55mDelta
Deal found 6/18$421
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 9/107:47 amITO - ONT
1 stop10h 23mAlaska Airlines
Wed 9/246:00 amONT - ITO
2 stops14h 39mAlaska Airlines
Deal found 6/16$428
This Southwest deal was found by Cheapflights users on 6/18. 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 7/98:20 pmKOA - ONT
2 stops11h 05mSouthwest
Mon 7/145:25 amONT - KOA
1 stop9h 35mSouthwest
Deal found 6/18$487
This Hawaiian Airlines deal was found by Cheapflights users on 6/16. 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 9/107:47 amITO - ONT
1 stop10h 23mHawaiian Airlines
Wed 9/2410:09 amONT - ITO
1 stop9h 47mHawaiian Airlines
Deal found 6/16$534
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Thu 12/1811:55 pmKOA - ONT
1 stop8h 04mUnited Airlines
Sat 1/106:00 amONT - KOA
1 stop8h 30mUnited Airlines
Deal found 6/18$561
This Delta deal was found by Cheapflights users on 6/18. 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 6/245:25 pmITO - ONT
2 stops18h 04mDelta
Mon 7/75:59 pmONT - ITO
2 stops30h 46mDelta
Deal found 6/18$822
This United Airlines deal was found by Cheapflights users on 6/16. 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 7/158:37 amITO - ONT
2 stops30h 06mUnited Airlines
Tue 7/221:19 pmONT - ITO
2 stops21h 49mUnited Airlines
Deal found 6/16$825
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Wed 7/99:45 pmKOA - ONT
1 stop17h 23mAmerican Airlines
Sun 7/1312:59 amONT - KOA
2 stops15h 53mAmerican Airlines
Deal found 6/18$954
This United deal was found by Cheapflights users on 6/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:05 pmKOA - ONT
1 stop11h 08mMultiple Airlines
Tue 10/71:31 pmONT - KOA
1 stop11h 09mMultiple Airlines
Deal found 6/17$1,985

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 June 18, 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 10/30

6:00 am-5:14 pm

1 stop8h 14m

Ontario

Tue 11/4

9:45 am-6:27 pm

1 stop10h 42m

$352

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 9/10

7:47 am-9:10 pm

1 stop10h 23m

Ontario

Wed 9/24

6:00 am-5:39 pm

2 stops14h 39m

$428

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 7/9

9:47 pm-1:34 pm

1 stop12h 47m

Ontario

Mon 7/14

6:25 am-5:34 pm

1 stop14h 09m

$461

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 7/9

8:20 pm-10:25 am

2 stops11h 05m

Ontario

Mon 7/14

5:25 am-12:00 pm

1 stop9h 35m

$487

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 9/10

7:47 am-9:10 pm

1 stop10h 23m

Ontario

Wed 9/24

10:09 am-4:56 pm

1 stop9h 47m

$534

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 7/9

10:50 pm-12:14 pm

1 stop10h 24m

Ontario

Tue 7/15

1:19 pm-7:21 pm

1 stop9h 02m

$595

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Sun 6/29

7:00 pm-2:25 pm

2 stops16h 25m

Ontario

Mon 7/7

5:59 pm-9:45 pm

2 stops30h 46m

$822

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 7/15

8:37 am-5:43 pm

2 stops30h 06m

Ontario

Tue 7/22

1:19 pm-8:08 am

2 stops21h 49m

$825

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 7/9

9:45 pm-6:08 pm

1 stop17h 23m

Ontario

Sun 7/13

12:59 am-1:52 pm

2 stops15h 53m

$954

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 10/3

10:05 pm-12:13 pm

1 stop11h 08m

Ontario

Tue 10/7

1:31 pm-9:40 pm

1 stop11h 09m

$1,985

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 20 results
1
2

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 $328). 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 June 18, 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.

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 June 18, 2025.
Read through reviews of airlines operating flights from The Big Island to Ontario, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,507 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    $176 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $180 and $231, 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, 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 $328). 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 3 airlines flying from The Big Island to Ontario

Discover the top 3 airlines 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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$286Average$429FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$359Average$422FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$361Average$552FlexibilityNo cancel feeOn-time63%

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