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$359+ Cheap flights from Illinois 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
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Cheap flight deals from Illinois to South Pacific

Keep the following information in mind while searching for Illinois to South Pacific flight deals. Data was last updated November 12, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$834
(American Airlines)

One-way from

$359
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$965
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
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From Illinois to South Pacific
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One-way flight from Illinois to South Pacific
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Highest demand for flights based on searches. 15% potential increase in price ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Illinois to South Pacific

Cheapest flights from Illinois to South Pacific
Explore the most affordable flight options available from Illinois to South Pacific. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 12, 2025.

This CrystalTravel deal was found by Cheapflights users on 11/11. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:15 pmORD - AKL
1 stop24h 55mQantas Airways
Sun 12/213:50 pmAKL - ORD
1 stop26h 50mQantas Airways
Deal found 11/11$836
This Ovago deal was found by Cheapflights users on 11/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:30 pmSTL - AKL
1 stop20h 40mQantas Airways
Mon 12/221:20 pmAKL - STL
1 stop22h 50mQantas Airways
Deal found 11/12$858
This Ovago deal was found by Cheapflights users on 11/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:17 pmORD - AKL
1 stop20h 38mQantas Airways
Wed 12/173:50 pmAKL - ORD
1 stop21h 02mQantas Airways
Deal found 11/12$858
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:35 amSTL - AKL
1 stop26h 35mAmerican Airlines
Mon 12/221:20 pmAKL - STL
1 stop25h 02mAmerican Airlines
Deal found 11/11$859
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/1911:20 amSTL - AKL
2 stops26h 50mUnited Airlines
Wed 12/103:50 pmAKL - STL
1 stop19h 37mUnited Airlines
Deal found 11/12$864
This Ovago deal was found by Cheapflights users on 11/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:15 pmORD - AKL
1 stop24h 55mQantas Airways
Tue 1/133:50 pmAKL - ORD
1 stop18h 07mQantas Airways
Deal found 11/12$886
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:15 pmORD - AKL
1 stop24h 55mAmerican Airlines
Sun 12/211:20 pmAKL - ORD
1 stop19h 16mAmerican Airlines
Deal found 11/11$909
This Qantas Airways deal was found by Cheapflights users on 11/12. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:50 pmORD - AKL
1 stop23h 20mQantas Airways
Tue 1/133:50 pmAKL - ORD
1 stop18h 07mQantas Airways
Deal found 11/12$911
This lol.travel deal was found by Cheapflights users on 11/9. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/304:46 pmORD - AKL
1 stop21h 24mQantas Airways
Mon 12/153:50 pmAKL - ORD
1 stop21h 02mQantas Airways
Deal found 11/9$922
This CrystalTravel deal was found by Cheapflights users on 11/10. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:05 pmORD - AKL
1 stop23h 05mQantas Airways
Tue 1/201:20 pmAKL - ORD
1 stop21h 17mQantas Airways
Deal found 11/10$928
This CrystalTravel deal was found by Cheapflights users on 11/11. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1011:45 amORD - AKL
1 stop27h 10mQantas Airways
Mon 12/221:20 pmAKL - ORD
1 stop25h 17mQantas Airways
Deal found 11/11$933
This oojo deal was found by Cheapflights users on 11/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:45 amORD - SYD
1 stop28h 15mQantas Airways
Tue 12/97:05 amSYD - ORD
2 stops25h 57mQantas Airways
Deal found 11/12$950

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 12, 2025.
Use the filters below to find and compare flights from Illinois to South Pacific that are best for you.

Fly from

Illinois

Fly to

South Pacific

Route

Depart

Return

Price

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Mon 12/8

5:30 pm-9:10 am

1 stop20h 40m

Auckland Intl

Mon 12/22

1:20 pm-5:10 pm

1 stop22h 50m

$858

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Wed 12/10

1:20 pm-9:10 am

1 stop24h 50m

Auckland Intl

Wed 12/17

1:20 pm-12:32 pm

1 stop18h 12m

$858

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Wed 11/19

11:20 am-9:10 am

2 stops26h 50m

Auckland Intl

Wed 12/10

3:50 pm-4:27 pm

1 stop19h 37m

$864

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Thu 12/11

9:30 am-9:10 am

1 stop28h 40m

Auckland Intl

Thu 12/25

3:50 pm-7:22 pm

2 stops22h 32m

$864

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Sun 2/8

6:00 pm-9:10 am

2 stops44h 10m

Auckland Intl

Tue 2/17

3:50 pm-9:00 pm

2 stops24h 10m

$880

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Sun 2/8

11:55 am-9:10 am

1 stop26h 15m

Auckland Intl

Tue 2/17

7:35 am-11:48 pm

2 stops35h 13m

$893

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Wed 11/19

5:58 pm-9:10 am

1 stop20h 12m

Auckland Intl

Wed 12/10

3:50 pm-11:57 pm

1 stop27h 07m

$958

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Sun 2/1

5:20 pm-9:10 am

1 stop20h 50m

Auckland Intl

Mon 2/9

1:20 pm-2:47 pm

1 stop20h 27m

$959

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Wed 1/21

9:52 am-8:35 am

2 stops27h 43m

Auckland Intl

Thu 1/29

2:35 pm-6:49 pm

2 stops23h 14m

$964

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Mon 2/9

1:50 pm-8:35 am

2 stops23h 45m

Auckland Intl

Wed 2/25

2:35 pm-9:43 pm

2 stops26h 08m

$964

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

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

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to South Pacific (average of $198). Flying from Illinois to South Pacific in November is currently the most expensive (average of $775). 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 IL to SP?

Find hourly flight availability from Illinois 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 12, 2025.

It’s typically best to fly out from Illinois to South Pacific at noon. Doing so could potentially save you 23% on the flight price compared to flying in the morning, which is usually more expensive.

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

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

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

Related info for your journey

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

    There are many flights that can get you from Illinois to South Pacific in 20h 40m. Fly via Qantas Airways, United Airlines, or American Airlines to get the fastest option. The distance from Illinois to South Pacific is about 7970 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $570 is the cheapest one-way deal found within the past few days, from Fiji Airways. You may also be able to find cheap deals on Qantas Airways and United Airlines, with prices starting from $682 and $700, respectively.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Illinois to South Pacific (average of $198). Flying from Illinois to South Pacific in November is currently the most expensive (average of $775). 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 Illinois to South Pacific

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to South Pacific

Discover the top 10 airlines that operate flights from Illinois 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$307Average$1,550FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$663Average$1,237FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$673Average$1,147FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,193FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$1,397FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$712Average$1,321FlexibilityNo cancel feeOn-time74%
DeltaCheapest$846Average$1,018FlexibilityNo cancel feeOn-timeN/A
Air Tahiti NuiCheapest$1,051Average$1,414FlexibilityNo cancel feeOn-time73%
Qatar AirwaysCheapest$1,229Average$1,331FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,264Average$1,579FlexibilityNo cancel feeOn-time78%

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