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$420+ Cheap flights from Ontario (ONT) to South Pacific

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Dec 9 — Dec 161
Tue 12/9
Tue 12/16
1 adult, Economy
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Find flight deals from Ontario to South Pacific

Cheapest flights from Ontario to South Pacific
Explore the most affordable flight options available from Ontario to South Pacific. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 9, 2025.

This Ticket deal was found by Cheapflights users on 11/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:00 amONT - RAR
1 stop18h 15mAlaska Airlines
Sun 12/141:05 pmRAR - ONT
1 stop30h 38mAlaska Airlines
Deal found 11/8$946
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Mon 11/106:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Tue 11/253:50 pmAKL - ONT
1 stop17h 47mUnited Airlines
Deal found 11/7$952
This American Airlines deal was found by Cheapflights users on 11/7. 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.
Mon 11/243:19 pmONT - AKL
1 stop20h 51mAmerican Airlines
Tue 12/161:20 pmAKL - ONT
1 stop19h 33mAmerican Airlines
Deal found 11/7$954
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 11/96:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Sun 11/2312:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Deal found 11/6$959
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/116:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Thu 11/203:50 pmAKL - ONT
1 stop17h 47mUnited Airlines
Deal found 11/6$960
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 11/297:50 amONT - RAR
1 stop16h 59mAlaska Airlines
Sun 12/71:05 pmRAR - ONT
1 stop29h 18mAlaska Airlines
Deal found 11/7$962
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Mon 11/246:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Tue 12/163:50 pmAKL - ONT
2 stops25h 52mUnited Airlines
Deal found 11/7$964
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/236:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Thu 11/2712:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Deal found 11/7$968
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Mon 12/86:41 pmONT - SYD
1 stop19h 34mUnited Airlines
Sun 12/2812:10 pmSYD - ONT
1 stop16h 51mUnited Airlines
Deal found 11/7$971
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Mon 11/106:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Fri 11/1412:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Deal found 11/6$974
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 11/166:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Mon 11/2411:50 amSYD - ONT
2 stops27h 54mUnited Airlines
Deal found 11/6$975
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/125:05 amONT - SYD
2 stops33h 10mUnited Airlines
Wed 11/1912:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Deal found 11/5$976

Cheap flight deals from Ontario to South Pacific

Keep the following information in mind while searching for Ontario to South Pacific flight deals. Data was last updated November 9, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$946
(Ticket)

One-way from

$420
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$974
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Sydney Kingsford Smith flights.
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From Ontario to South Pacific
Search Deals
One-way flight from Ontario to South Pacific
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to South Pacific 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 November 9, 2025.
Use the filters below to find and compare flights from Ontario to South Pacific that are best for you.

Fly from

Ontario

Fly to

South Pacific

Route

Depart

Return

Price

OntarioRarotonga

ONT - RAR

ONTRAR

Ontario

Sat 12/6

7:00 am-11:15 pm

1 stop18h 15m

Rarotonga

Sun 12/14

1:05 pm-9:43 pm

1 stop30h 38m

$946

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Wed 11/26

1:40 pm-9:10 am

1 stop22h 30m

Auckland Intl

Tue 12/16

3:50 pm-12:17 pm

1 stop17h 27m

$960

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Thu 11/27

1:40 pm-9:10 am

1 stop22h 30m

Auckland Intl

Tue 12/16

3:50 pm-5:37 pm

1 stop22h 47m

$960

OntarioRarotonga

ONT - RAR

ONTRAR

Ontario

Sat 11/29

7:50 am-10:49 pm

1 stop16h 59m

Rarotonga

Sun 12/7

1:05 pm-8:23 pm

1 stop29h 18m

$962

OntarioRarotonga

ONT - RAR

ONTRAR

Ontario

Sat 2/7

8:13 am-10:40 pm

1 stop16h 27m

Rarotonga

Sun 2/15

1:05 pm-9:55 pm

1 stop30h 50m

$962

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 12/8

6:41 pm-9:15 am

1 stop19h 34m

Sydney Kingsford Smith

Mon 12/15

12:10 pm-12:17 pm

1 stop19h 07m

$971

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 2/2

1:53 pm-6:20 am

1 stop21h 27m

Sydney Kingsford Smith

Tue 2/17

2:00 pm-12:38 pm

1 stop17h 38m

$971

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 11/23

6:38 pm-9:15 am

1 stop19h 37m

Sydney Kingsford Smith

Mon 12/8

12:10 pm-12:17 pm

1 stop19h 07m

$971

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 11/24

6:38 pm-9:15 am

1 stop19h 37m

Sydney Kingsford Smith

Fri 11/28

12:10 pm-12:37 pm

1 stop19h 27m

$974

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 11/20

6:05 am-7:00 am

1 stop29h 55m

Sydney Kingsford Smith

Sun 11/23

12:10 pm-5:34 pm

1 stop24h 24m

$974

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to South Pacific

Have a flexible travel schedule? Discover the best time to fly to South Pacific 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 South Pacific

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

Currently, April is the cheapest month in which you can book a flight from Ontario to South Pacific (average of $329). Flying from Ontario to South Pacific in September is currently the most expensive (average of $667). 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 SP?

Find hourly flight availability from Ontario to South Pacific. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 9, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to South Pacific at noon. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Ontario to South Pacific?

Use this chart to determine the cheapest time to fly round-trip from Ontario to South Pacific. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to South Pacific flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing South Pacific

Get insights into the airlines that provide service to South Pacific. 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 South Pacific. Reviews last updated November 9, 2025.
Read reviews from past customers who have flown United Airlines from Ontario to South Pacific. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,012 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,012 reviews
United Airlines
7.4
Good
9,012 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Ontario to South Pacific. 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 South Pacific?

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

  • How long is the flight from Ontario to South Pacific?

    There are many flights that can get you from Ontario to South Pacific in 18h 15m. Fly via Alaska Airlines, United Airlines, or Hawaiian Airlines to get the fastest option. The distance from Ontario to South Pacific is about 4716 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Ontario to South Pacific one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $464. American Airlines flights start at $556 while deals on Alaska Airlines start at $646 one-way.

  • What are the most popular routes from Ontario to South Pacific?

    The most popular flight routes from Ontario to South Pacific are Ontario - Sydney Kingsford Smith, Ontario - Auckland Intl and Ontario - Melbourne.

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

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

  • How can I find direct flights from Ontario to South Pacific?

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

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

    Yes. Cheapflights offers flight deals from Ontario to South Pacific 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 South Pacific?

    Currently, April is the cheapest month in which you can book a flight from Ontario to South Pacific (average of $329). Flying from Ontario to South Pacific in September is currently the most expensive (average of $667). 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 Ontario to South Pacific

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Ontario to South Pacific

Discover the top airline that operate flights from Ontario to South Pacific. 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 November 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,206FlexibilityNo cancel feeOn-time69%

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