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$149+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$362
(Delta)

One-way from

$149
(Delta)

Popular in

June

Cheapest in

January

Average price

$636
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. 15% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 3, 2025.

This Delta deal was found by Cheapflights users on 4/2. 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 5/68:20 pmKOA - ONT
1 stop11h 44mDelta
Wed 5/286:00 amONT - KOA
1 stop14h 31mDelta
Deal found 4/2$362
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Wed 12/2411:55 pmKOA - ONT
1 stop8h 04mUnited Airlines
Wed 12/316:00 amONT - KOA
1 stop8h 30mUnited Airlines
Deal found 4/2$397
This Alaska Airlines deal was found by Cheapflights users on 4/2. 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 9/1212:13 pmKOA - ONT
1 stop8h 46mAlaska Airlines
Mon 9/153:00 pmONT - KOA
1 stop10h 09mAlaska Airlines
Deal found 4/2$403
This Hawaiian Airlines deal was found by Cheapflights users on 4/2. 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.
Thu 9/189:34 amITO - ONT
1 stop8h 36mHawaiian Airlines
Fri 9/198:35 amONT - ITO
1 stop8h 42mHawaiian Airlines
Deal found 4/2$580
This United Airlines deal was found by Cheapflights users on 4/2. 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 9/187:49 amITO - ONT
2 stops21h 49mUnited Airlines
Fri 9/191:42 pmONT - ITO
2 stops21h 25mUnited Airlines
Deal found 4/2$582
This Alaska Airlines deal was found by Cheapflights users on 4/2. 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 4/301:45 pmITO - ONT
2 stops22h 47mAlaska Airlines
Wed 5/79:45 amONT - ITO
1 stop11h 16mAlaska Airlines
Deal found 4/2$583
This Southwest deal was found by Cheapflights users on 4/2. 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.
Sun 4/66:00 amITO - ONT
2 stops10h 25mSouthwest
Tue 4/811:00 amONT - ITO
2 stops10h 10mSouthwest
Deal found 4/2$594
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Thu 4/179:16 pmKOA - ONT
1 stop8h 43mAmerican Airlines
Mon 4/214:35 pmONT - KOA
1 stop24h 45mAmerican Airlines
Deal found 4/1$652
This Southwest deal was found by Cheapflights users on 4/1. 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 4/86:05 amKOA - ONT
2 stops10h 25mSouthwest
Sat 4/126:20 amONT - KOA
1 stop8h 50mSouthwest
Deal found 4/1$663
This Hawaiian Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 4/48:00 amKOA - ONT
1 stop9h 55mHawaiian Airlines
Mon 4/79:45 amONT - KOA
1 stop10h 42mHawaiian Airlines
Deal found 4/1$969
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Wed 4/306:30 pmITO - ONT
3 stops14h 54mMultiple Airlines
Wed 5/76:00 amONT - ITO
2 stops12h 46mMultiple Airlines
Deal found 4/2$1,264

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 April 3, 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

Tue 5/6

8:20 pm-11:04 am

1 stop11h 44m

Ontario

Wed 5/28

6:00 am-5:31 pm

1 stop14h 31m

$362

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 9/12

12:13 pm-11:59 pm

1 stop8h 46m

Ontario

Mon 9/15

3:00 pm-10:09 pm

1 stop10h 09m

$403

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Fri 9/12

4:08 pm-8:38 am

2 stops13h 30m

Ontario

Mon 9/15

1:42 pm-7:24 pm

1 stop8h 42m

$560

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Thu 9/18

9:34 am-9:10 pm

1 stop8h 36m

Ontario

Fri 9/19

8:35 am-2:17 pm

1 stop8h 42m

$580

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Thu 9/18

7:49 am-8:38 am

2 stops21h 49m

Ontario

Fri 9/19

1:42 pm-8:07 am

2 stops21h 25m

$582

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 4/30

1:45 pm-3:32 pm

2 stops22h 47m

Ontario

Wed 5/7

9:45 am-6:01 pm

1 stop11h 16m

$583

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 4/30

8:05 am-9:50 pm

2 stops10h 45m

Ontario

Wed 5/7

10:35 am-9:40 pm

2 stops14h 05m

$609

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/17

9:16 pm-8:59 am

1 stop8h 43m

Ontario

Mon 4/21

4:35 pm-2:20 pm

1 stop24h 45m

$652

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 4/30

6:30 pm-12:24 pm

3 stops14h 54m

Ontario

Wed 5/7

6:00 am-3:46 pm

2 stops12h 46m

$1,264

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sun 5/4

8:20 pm-11:05 am

1 stop11h 45m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 21 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 $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 April 3, 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 April 3, 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
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,825 reviews
Alaska Airlines
8.0
Very good
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,274 reviews
Alaska Airlines
8.0
Very good
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,897 reviews
Alaska Airlines
8.0
Very good
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,344 reviews
Alaska Airlines
8.0
Very good
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,619 reviews
Alaska Airlines
8.0
Very good
9,825 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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?

    $149 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and American Airlines, with prices starting from $177 and $189, 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 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 April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$365Average$436FlexibilityNo cancel feeOn-time75%

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