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Ontario

$236+ Cheap flights from Hilo to Ontario (ITO - 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ITO — ONT
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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Cheap flight deals from Hilo to Ontario

Cheapest flights from Hilo to Ontario
Explore the most affordable flight options available from Hilo to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.

This Southwest deal was found by Cheapflights users on 3/10. 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 4/76:00 am
ITO
-
ONT
2 stops10h 35m
Southwest
Tue 4/1412:30 pm
ONT
-
ITO
2 stops12h 15m
Southwest
Deal found 3/10$403
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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 4/257:42 am
ITO
-
ONT
1 stop10h 28m
Multiple Airlines
Wed 4/298:30 am
ONT
-
ITO
1 stop9h 01m
Multiple Airlines
Deal found 3/11$474
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 10/2210:44 am
ITO
-
ONT
1 stop7h 44m
Multiple Airlines
Mon 10/269:00 am
ONT
-
ITO
1 stop8h 11m
Multiple Airlines
Deal found 3/10$515
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 11/2410:44 am
ITO
-
ONT
1 stop8h 44m
Multiple Airlines
Sat 11/289:00 am
ONT
-
ITO
1 stop8h 41m
Multiple Airlines
Deal found 3/9$525
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/2112:21 pm
ITO
-
ONT
1 stop7h 38m
Multiple Airlines
Wed 4/228:30 am
ONT
-
ITO
1 stop10h 44m
Multiple Airlines
Deal found 3/8$535
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 4/2510:56 am
ITO
-
ONT
1 stop7h 14m
Multiple Airlines
Sat 5/28:30 am
ONT
-
ITO
1 stop9h 01m
Multiple Airlines
Deal found 3/10$575
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/2310:56 am
ITO
-
ONT
1 stop7h 14m
Multiple Airlines
Thu 4/308:30 am
ONT
-
ITO
1 stop9h 01m
Multiple Airlines
Deal found 3/9$585
This Expedia deal was found by Cheapflights users on 3/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/78:23 am
ITO
-
ONT
2 stops22h 16m
Multiple Airlines
Tue 4/148:32 am
ONT
-
ITO
1 stop10h 43m
Multiple Airlines
Deal found 3/10$625
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/199:58 am
ITO
-
ONT
1 stop10h 01m
Multiple Airlines
Tue 4/216:00 am
ONT
-
ITO
2 stops14h 27m
Multiple Airlines
Deal found 3/9$651

Find flight deals from Hilo to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Hilo (ITO) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$403
(Southwest)

One-way from

$236
(Alaska Airlines)

Popular in

October

Cheapest in

August

Average price

$505
Provider with most accurate pricing for Hilo Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Hilo Intl-Ontario flights.
Search Deals
From Hilo Intl to Ontario
Search Deals
One-way flight from Hilo Intl to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Hilo 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 March 13, 2026.
Use the filters below to find and compare flights from Hilo to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 4/7

6:00 am-7:35 pm

2 stops10h 35m

Ontario

Tue 4/14

12:30 pm-9:45 pm

2 stops12h 15m

$403

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Tue 4/21

12:21 pm-10:59 pm

1 stop7h 38m

Ontario

Wed 4/22

10:39 am-9:33 pm

2 stops13h 54m

$546
Quickest round-trip

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Sat 4/25

10:56 am-9:10 pm

1 stop7h 14m

Ontario

Sat 5/2

8:30 am-2:31 pm

1 stop9h 01m

$575

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Thu 4/23

10:56 am-9:10 pm

1 stop7h 14m

Ontario

Thu 4/30

8:30 am-2:31 pm

1 stop9h 01m

$585

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Sun 4/19

9:58 am-10:59 pm

1 stop10h 01m

Ontario

Tue 4/21

6:00 am-5:27 pm

2 stops14h 27m

$651
Cheapest one-way

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Thu 8/13

9:27 am-9:47 pm

1 stop9h 20m

$242

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Mon 8/17

5:59 pm-11:14 am

2 stops14h 15m

$268

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Mon 3/23

6:00 am-6:15 pm

2 stops9h 15m

$288

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Sun 8/16

9:00 pm-1:13 pm

2 stops13h 13m

$298

HiloOntario

ITO - ONT

ITOONT

Hilo Intl

Mon 4/20

10:56 am-10:59 pm

1 stop9h 03m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 16 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Hilo-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Hilo-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Hilo-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Hilo-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Hilo-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Hilo to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Hilo 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 Hilo to Ontario

What is the cheapest month to book a flight from Hilo to Ontario?

Currently, October is the cheapest month in which you can book a flight from Hilo to Ontario (average of $159). Flying from Hilo to Ontario in March is currently the most expensive (average of $246). 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.

Related info for your journey

Find useful and relevant information for your journey from Hilo to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Hilo to Ontario?

    A quick flight from Hilo to Ontario can take about 10h 35m. Southwest provides one of the quickest options available for as low as $403. There are 2491 mi between Hilo and Ontario.

  • Can I find deals for flights from Hilo to Ontario that include hotel bookings?

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

  • How can I find direct flights from Hilo to Ontario?

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

  • Can I find deals for business class flights from Hilo to Ontario?

    Yes. Cheapflights offers flight deals from Hilo 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 Hilo to Ontario?

    Currently, October is the cheapest month in which you can book a flight from Hilo to Ontario (average of $159). Flying from Hilo to Ontario in March is currently the most expensive (average of $246). 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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