HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
South Pacific

$340+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to South Pacific 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.

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 18, 2025.

This Delta deal was found by Cheapflights users on 11/17. 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.
Sun 11/236:00 amONT - AKL
2 stops29h 35mDelta
Wed 12/102:35 pmAKL - ONT
2 stops30h 23mDelta
Deal found 11/17$764
This American Airlines deal was found by Cheapflights users on 11/17. 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.
Sun 11/2311:59 pmONT - AKL
1 stop36h 11mAmerican Airlines
Wed 12/103:50 pmAKL - ONT
2 stops23h 29mAmerican Airlines
Deal found 11/17$803
This United Airlines deal was found by Cheapflights users on 11/18. 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 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
Mon 12/83:50 pmAKL - ONT
1 stop17h 27mUnited Airlines
Deal found 11/18$850
This United Airlines deal was found by Cheapflights users on 11/17. 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 12/46:41 pmONT - AKL
1 stop17h 29mUnited Airlines
Wed 12/173:50 pmAKL - ONT
1 stop17h 27mUnited Airlines
Deal found 11/17$852
This United Airlines deal was found by Cheapflights users on 11/17. 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 11/256:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Wed 12/103:50 pmAKL - ONT
1 stop17h 27mUnited Airlines
Deal found 11/17$860
This United Airlines deal was found by Cheapflights users on 11/16. 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 11/266:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Mon 12/83:50 pmAKL - ONT
1 stop27h 59mUnited Airlines
Deal found 11/16$866
This United Airlines deal was found by Cheapflights users on 11/17. 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 11/235:05 amONT - AKL
2 stops55h 05mUnited Airlines
Thu 12/113:50 pmAKL - ONT
2 stops25h 52mUnited Airlines
Deal found 11/17$880
This United Airlines deal was found by Cheapflights users on 11/17. 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 11/235:05 amONT - AKL
2 stops55h 05mUnited Airlines
Mon 12/83:50 pmAKL - ONT
1 stop27h 59mUnited Airlines
Deal found 11/17$887
This United Airlines deal was found by Cheapflights users on 11/16. 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 11/235:05 amONT - AKL
2 stops55h 05mUnited Airlines
Wed 12/103:50 pmAKL - ONT
2 stops41h 42mUnited Airlines
Deal found 11/16$896
This United Airlines deal was found by Cheapflights users on 11/17. 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 11/226:38 pmONT - AKL
1 stop17h 32mUnited Airlines
Wed 12/103:50 pmAKL - ONT
1 stop17h 27mUnited Airlines
Deal found 11/17$910
This United Airlines deal was found by Cheapflights users on 11/17. 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
Sun 12/712:10 pmSYD - ONT
1 stop19h 08mUnited Airlines
Deal found 11/17$959
This United Airlines deal was found by Cheapflights users on 11/17. 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.
Fri 11/216:00 amONT - BNE
1 stop31h 30mUnited Airlines
Fri 12/511:40 amBNE - ONT
1 stop29h 09mUnited Airlines
Deal found 11/17$960

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 18, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$849
(United Airlines)

One-way from

$340
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$965
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.
Search Deals
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 ($152 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
Search Deals

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 18, 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

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Tue 2/3

1:53 pm-9:10 am

1 stop22h 17m

Auckland Intl

Mon 2/9

3:50 pm-11:18 am

1 stop16h 28m

$860

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Mon 2/23

1:45 pm-9:10 am

1 stop22h 25m

Auckland Intl

Wed 3/4

3:50 pm-12:38 pm

1 stop17h 48m

$860

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Thu 4/2

1:33 pm-8:10 am

1 stop22h 37m

Auckland Intl

Thu 4/16

1:50 pm-12:20 pm

1 stop17h 30m

$860

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Mon 2/2

1:53 pm-9:10 am

1 stop22h 17m

Auckland Intl

Wed 2/11

3:50 pm-5:43 pm

1 stop22h 53m

$860

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Mon 2/2

5:05 am-9:10 am

2 stops31h 05m

Auckland Intl

Thu 2/12

3:50 pm-12:38 pm

1 stop17h 48m

$864

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Wed 2/18

5:00 am-9:10 am

2 stops31h 10m

Auckland Intl

Thu 3/5

3:50 pm-10:57 pm

1 stop28h 07m

$871

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Wed 3/4

5:00 am-9:10 am

2 stops31h 10m

Auckland Intl

Wed 3/18

2:50 pm-10:57 pm

1 stop28h 07m

$871

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Sun 2/1

6:39 pm-9:10 am

1 stop17h 31m

Auckland Intl

Wed 2/11

3:50 pm-5:43 pm

1 stop22h 53m

$910

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Wed 2/4

1:53 pm-9:10 am

1 stop22h 17m

Auckland Intl

Fri 2/13

3:50 pm-12:38 pm

1 stop17h 48m

$910

OntarioAuckland

ONT - AKL

ONTAKL

Ontario

Mon 2/2

1:53 pm-9:10 am

1 stop22h 17m

Auckland Intl

Sun 2/8

3:50 pm-5:43 pm

1 stop22h 53m

$910

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 60 results
1
2
3
...
6

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 18, 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 18, 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
9,019 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

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
9,019 reviews
United Airlines
7.4
Good
9,019 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

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 16h 55m. Fly via United Airlines, Alaska Airlines, or Qatar Airways 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. Alaska Airlines flights start at $651 while deals on Qatar Airways start at $774 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

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 South Pacific

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Haneda flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
Los Angeles to Honolulu flights
San Francisco to Las Vegas flights
Los Angeles to Narita flights
San Francisco to Los Angeles flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Cancún flights
San Francisco to Honolulu flights
San Francisco to Haneda flights
Los Angeles to Mexico City flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to San Francisco flights
San Francisco to LaGuardia flights
Los Angeles to Las Vegas flights
Los Angeles to Miami flights
Los Angeles to Orlando flights
San Francisco to Ontario flights
San Francisco to Cancún flights
Ontario to San Francisco flights
San Francisco to Narita flights
San Francisco to Santa Ana flights
Los Angeles to Manila flights
Los Angeles to Fort Lauderdale flights
San Francisco to Mexico City flights
Ontario to Seattle flights
San Jose to Las Vegas flights
San Diego to John F Kennedy Intl flights
Los Angeles to O'Hare Intl flights
San Francisco to Seattle flights
Los Angeles to Heathrow flights
Burbank to Las Vegas flights
Los Angeles to Boston flights
Ontario to Dallas/Fort Worth flights
Los Angeles to Charles de Gaulle flights
Santa Ana to San Francisco flights
Los Angeles to Suvarnabhumi flights
San Francisco to Manila flights
Los Angeles to Denver flights
Los Angeles to San Salvador flights
San Francisco to O'Hare Intl flights
Los Angeles to Hobby flights
Los Angeles to Kahului flights
Santa Ana to Dallas/Fort Worth flights
Ontario to John F Kennedy Intl flights

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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,206FlexibilityNo cancel feeOn-time69%

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.