HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
The Big Island

$141+ Cheap flights from Ontario (ONT) to The Big Island

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KOA
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to The Big Island 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 Ontario to The Big Island

Keep the following information in mind while searching for Ontario to The Big Island flight deals. Data was last updated October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$281
(Alaska Airlines)

One-way from

$141
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$347
Provider with most accurate pricing for Los Angeles-Kona Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Kona Intl flights.
Search Deals
From Ontario to The Big Island
Search Deals
One-way flight from Ontario to The Big Island
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Ontario to The Big Island

Cheapest flights from Ontario to The Big Island
Explore the most affordable flight options available from Ontario to The Big Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 2, 2025.

This Delta deal was found by Cheapflights users on 10/2. 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.
Thu 12/46:40 amONT - KOA
1 stop13h 41mDelta
Mon 12/88:43 pmKOA - ONT
1 stop12h 30mDelta
Deal found 10/2$291
This Southwest deal was found by Cheapflights users on 10/1. 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.
Wed 10/297:00 amONT - KOA
1 stop8h 10mSouthwest
Wed 11/59:15 pmKOA - ONT
2 stops10h 40mSouthwest
Deal found 10/1$296
This Delta deal was found by Cheapflights users on 9/30. 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.
Mon 10/277:35 amONT - KOA
1 stop12h 55mDelta
Mon 11/39:30 pmKOA - ONT
2 stops12h 44mDelta
Deal found 9/30$297
This Delta deal was found by Cheapflights users on 10/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:00 amONT - KOA
2 stops14h 30mDelta
Wed 11/59:30 pmKOA - ONT
2 stops12h 46mDelta
Deal found 10/1$302
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 12/36:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Fri 12/59:00 amKOA - ONT
1 stop12h 29mAlaska Airlines
Deal found 9/30$308
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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.
Tue 12/26:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Tue 12/99:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 10/2$312
This Delta deal was found by Cheapflights users on 9/30. 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.
Mon 10/277:35 amONT - KOA
1 stop12h 55mDelta
Fri 10/319:30 pmKOA - ONT
2 stops11h 44mDelta
Deal found 9/30$313
This KAYAK deal was found by Cheapflights users on 10/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:59 amONT - ITO
2 stops13h 27mAlaska Airlines
Fri 10/316:00 amITO - ONT
1 stop8h 14mAlaska Airlines
Deal found 10/1$314
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/812:13 pmONT - KOA
1 stop11h 17mAlaska Airlines
Wed 12/179:10 pmKOA - ONT
1 stop10h 40mAlaska Airlines
Deal found 10/1$314
This Delta deal was found by Cheapflights users on 10/2. 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 11/116:00 amONT - KOA
2 stops14h 13mDelta
Fri 11/148:30 pmKOA - ONT
2 stops13h 48mDelta
Deal found 10/2$319
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:00 amONT - KOA
1 stop13h 22mAlaska Airlines
Sun 12/149:10 pmKOA - ONT
1 stop12h 09mAlaska Airlines
Deal found 10/1$325
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 11/411:59 amONT - KOA
1 stop11h 41mAlaska Airlines
Mon 11/106:00 amKOA - ONT
1 stop9h 14mAlaska Airlines
Deal found 9/30$331

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to The Big Island 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 2, 2025.
Use the filters below to find and compare flights from Ontario to The Big Island that are best for you.

Fly from

Ontario

Fly to

The Big Island

Route

Depart

Return

Price

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Wed 12/3

6:40 am-6:21 pm

1 stop13h 41m

Kona Intl

Tue 12/9

8:43 pm-11:13 am

1 stop12h 30m

$291

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 1/20

8:13 am-5:09 pm

1 stop10h 56m

Kona Intl

Wed 1/28

6:00 am-10:28 pm

1 stop14h 28m

$303

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/11

6:00 am-6:13 pm

2 stops14h 13m

Kona Intl

Fri 11/14

8:30 pm-12:18 pm

2 stops13h 48m

$319

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Sun 1/11

8:13 am-5:09 pm

1 stop10h 56m

Kona Intl

Thu 1/15

6:00 am-10:28 pm

1 stop14h 28m

$320

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/18

6:40 am-12:45 pm

1 stop8h 05m

Kona Intl

Mon 11/24

10:00 am-11:15 pm

2 stops11h 15m

$337

OntarioHilo

ONT - ITO

ONTITO

Ontario

Tue 11/11

6:00 am-8:30 pm

2 stops16h 30m

Hilo Intl

Fri 11/14

8:56 am-11:32 pm

2 stops12h 36m

$344

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Tue 11/11

7:20 am-11:09 am

1 stop29h 49m

Kona Intl

Fri 11/14

9:20 pm-11:05 am

1 stop11h 45m

$354

OntarioKailua-Kona

ONT - KOA

ONTKOA

Ontario

Sun 2/1

8:13 am-3:50 pm

1 stop9h 37m

Kona Intl

Sat 2/7

9:10 pm-10:59 am

1 stop11h 49m

$357

OntarioHilo

ONT - ITO

ONTITO

Ontario

Wed 10/29

11:59 am-10:26 pm

2 stops13h 27m

Hilo Intl

Fri 10/31

6:00 am-8:53 pm

2 stops11h 53m

$369

OntarioHilo

ONT - ITO

ONTITO

Ontario

Wed 1/7

8:13 am-4:05 pm

1 stop9h 52m

Hilo Intl

Thu 1/15

10:56 am-10:28 pm

1 stop9h 32m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Showing 1-10 of 44 results
1
2
3
...
5

Best time to book a flight from Ontario to The Big Island

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to The Big Island (average of $409). Flying from Ontario to The Big Island in June is currently the most expensive (average of $624). 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 ONT to FUI?

Find hourly flight availability from Ontario to The Big Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 2, 2025.

When flying from Ontario to The Big Island, 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 The Big Island

Get insights into the airlines that provide service to The Big Island. 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 The Big Island. Reviews last updated October 2, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to The Big Island by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
10,994 reviews
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,962 reviews
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Hawaiian Airlines
7.8
Good
2,762 reviews
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,933 reviews
Alaska Airlines
8.0
Very good
10,994 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Related info for your journey

Find useful and relevant information for your journey from Ontario to The Big Island. 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 from for flights from Ontario to The Big Island?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to The Big Island. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    Delta, Alaska Airlines, and Southwest can get you from Ontario to The Big Island in just under 8h 05m. Your travel time can differ by up to 5h 36m. The distance between Ontario and The Big Island is about 2547 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Ontario to The Big Island?

    When deciding which route to take from Ontario to The Big Island consider Ontario - Kona Intl, Ontario - Hilo Intl or Ontario - Waimea (Big Island) Waimea Kohala as they are the most popular.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to The Big Island (average of $409). Flying from Ontario to The Big Island in June is currently the most expensive (average of $624). 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 Ontario to The Big Island

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

Top 6 airlines flying from Ontario to The Big Island

Discover the top 6 airlines that operate flights from Ontario to The Big Island. 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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$232Average$497FlexibilityNo cancel feeOn-time85%
DeltaCheapest$233Average$382FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$265Average$407FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$277Average$579FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$340Average$644FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$348Average$576FlexibilityNo 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.