HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$142+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
KOA — ONT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from The Big Island to Ontario 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 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$302
(Delta)

One-way from

$142
(American Airlines)

Popular in

June

Cheapest in

January

Average price

$502
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. 15% potential increase in price ($99 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This Delta deal was found by Cheapflights users on 2/18. 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.
Wed 4/238:20 pmKOA - ONT
1 stop11h 45mDelta
Tue 4/295:45 amONT - KOA
1 stop14h 54mDelta
Deal found 2/18$283
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Thu 4/249:16 pmKOA - ONT
1 stop8h 43mAmerican Airlines
Tue 4/297:25 pmONT - KOA
1 stop21h 55mAmerican Airlines
Deal found 2/18$399
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 3/127:00 amKOA - ONT
1 stop10h 55mAlaska Airlines
Tue 4/86:00 amONT - KOA
1 stop19h 30mAlaska Airlines
Deal found 2/19$412
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 3/511:29 amITO - ONT
1 stop8h 21mAlaska Airlines
Wed 3/128:50 amONT - ITO
1 stop8h 47mAlaska Airlines
Deal found 2/19$574
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/611:55 pmKOA - ONT
1 stop7h 59mUnited Airlines
Mon 3/106:00 amONT - KOA
2 stops10h 52mUnited Airlines
Deal found 2/19$617
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 3/268:40 amITO - ONT
1 stop9h 15mHawaiian Airlines
Sun 3/308:50 amONT - ITO
1 stop8h 46mHawaiian Airlines
Deal found 2/19$751
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/155:35 pmITO - ONT
2 stops21h 29mUnited Airlines
Mon 3/176:00 amONT - ITO
2 stops15h 00mUnited Airlines
Deal found 2/19$2,878

Find flights from The Big Island to Ontario within your budget

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 February 20, 2025.

Fly from

The Big Island

Fly to

Ontario

Route

Depart

Return

Price

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 4/23

8:20 pm-11:05 am

1 stop11h 45m

Ontario

Tue 4/29

5:45 am-5:39 pm

1 stop14h 54m

$283

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 4/24

9:16 pm-8:59 am

1 stop8h 43m

Ontario

Tue 4/29

7:25 pm-2:20 pm

1 stop21h 55m

$399

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 3/12

7:00 am-8:55 pm

1 stop10h 55m

Ontario

Tue 4/8

6:00 am-10:30 pm

1 stop19h 30m

$412

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 3/5

11:29 am-9:50 pm

1 stop8h 21m

Ontario

Wed 3/12

8:50 am-2:37 pm

1 stop8h 47m

$574

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 3/6

11:55 pm-9:54 am

1 stop7h 59m

Ontario

Mon 3/10

6:00 am-1:52 pm

2 stops10h 52m

$617

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Wed 3/26

8:40 am-8:55 pm

1 stop9h 15m

Ontario

Sun 3/30

8:50 am-2:36 pm

1 stop8h 46m

$751

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Sat 3/15

5:35 pm-6:04 pm

2 stops21h 29m

Ontario

Mon 3/17

6:00 am-6:00 pm

2 stops15h 00m

$2,878

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Wed 4/16

8:20 pm-11:05 am

1 stop11h 45m

$142

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Sun 5/11

11:04 pm-12:24 pm

1 stop10h 20m

$189

Kailua-KonaOntario

KOA - ONT

KOAONT

Kona Intl

Thu 5/8

9:33 pm-10:51 am

1 stop10h 18m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 18 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.

Travel insights for flights from The Big Island to Ontario

Get recent, data-driven insights about flights from The Big Island to Ontario including ideal travel times, pricing trends, and more.

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 $315). 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 February 20, 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 February 20, 2025.
Read through reviews of airlines operating flights from The Big Island to Ontario, such as Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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?

    $142 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 United Airlines, with prices starting from $161 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 $315). 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

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 for The Big Island to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Honolulu to Las Vegas flights
Honolulu to Los Angeles flights
Honolulu to Ontario flights
Honolulu to San Francisco flights
Honolulu to San Diego flights
Kahului to Las Vegas flights
Honolulu to San Jose flights
Honolulu to Long Beach flights
Kailua-Kona to Las Vegas flights
Kahului to Los Angeles flights
Honolulu to Sacramento flights
Lihue to Los Angeles flights
Honolulu to Reno flights
Lihue to Las Vegas flights
Kahului to San Francisco flights
Honolulu to Oakland flights
Kailua-Kona to Los Angeles flights
Kailua-Kona to San Francisco flights
Kahului to San Jose flights
Lihue to San Francisco flights
Honolulu to Burbank flights
Honolulu to Santa Ana flights
Kailua-Kona to San Jose flights
Lihue to San Diego flights
Hilo to Las Vegas flights
Kahului to San Diego flights
Kahului to Long Beach flights
Kahului to Ontario flights
Kailua-Kona to San Diego flights
Kahului to Reno flights
Lihue to Ontario flights
Hilo to Los Angeles flights
Kahului to Sacramento flights
Honolulu to Fresno flights
Kailua-Kona to Ontario flights
Kailua-Kona to Oakland flights
Lihue to Sacramento flights
Kailua-Kona to Reno flights
Honolulu to Palm Springs flights
Kailua-Kona to Sacramento flights
Lihue to Oakland flights
Kahului to Oakland flights
Honolulu to Monterey flights
Honolulu to Medford flights
Hilo to Oakland flights
Hilo to Ontario flights
Hilo to San Jose flights
Hilo to San Francisco flights
Hilo to Sacramento flights
Lihue to San Jose flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$365Average$407FlexibilityNo cancel feeOn-time75%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.