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South Pacific

$300+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap 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 December 4, 2025.

This Expedia deal was found by Cheapflights users on 12/3. 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.
Wed 12/34:05 pmSTL - AKL
3 stops62h 25mMultiple Airlines
Wed 12/172:00 pmAKL - STL
2 stops21h 28mMultiple Airlines
Deal found 12/3$838
This FlightHub deal was found by Cheapflights users on 12/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:30 pmSTL - AKL
1 stop20h 40mQantas Airways
Fri 12/121:20 pmAKL - STL
1 stop22h 14mQantas Airways
Deal found 12/4$848
This Ovago deal was found by Cheapflights users on 12/4. 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 12/81:20 pmSTL - AKL
1 stop24h 50mQantas Airways
Mon 12/221:20 pmAKL - STL
1 stop25h 02mQantas Airways
Deal found 12/4$859
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/31:35 pmSTL - AKL
2 stops24h 35mUnited Airlines
Wed 12/173:50 pmAKL - STL
1 stop19h 37mUnited Airlines
Deal found 12/3$861
This United Airlines deal was found by Cheapflights users on 12/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:10 pmORD - AKL
1 stop22h 00mUnited Airlines
Wed 12/103:50 pmAKL - ORD
1 stop22h 54mUnited Airlines
Deal found 12/2$861
This American Airlines deal was found by Cheapflights users on 12/3. 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 12/81:20 pmSTL - AKL
2 stops25h 35mAmerican Airlines
Mon 12/221:20 pmAKL - STL
1 stop25h 02mAmerican Airlines
Deal found 12/3$865
This American Airlines deal was found by Cheapflights users on 12/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:30 pmORD - AKL
2 stops22h 40mAmerican Airlines
Wed 12/103:50 pmAKL - ORD
2 stops20h 55mAmerican Airlines
Deal found 12/2$865
This lastminute.com deal was found by Cheapflights users on 12/3. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:10 pmORD - AKL
1 stop21h 00mQantas Airways
Tue 12/231:20 pmAKL - ORD
1 stop19h 16mQantas Airways
Deal found 12/3$866
This Expedia deal was found by Cheapflights users on 12/4. 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.
Fri 12/54:37 pmSTL - AKL
2 stops47h 23mAir Canada
Fri 12/122:00 pmAKL - STL
2 stops25h 57mAir Canada
Deal found 12/4$888
This oojo deal was found by Cheapflights users on 12/4. 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.
Fri 12/58:35 amORD - AKL
2 stops44h 50mQantas Airways
Wed 12/173:50 pmAKL - ORD
1 stop19h 12mQantas Airways
Deal found 12/4$895
This CheapOair deal was found by Cheapflights users on 12/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:45 pmORD - AKL
2 stops27h 15mAir Canada
Wed 12/172:00 pmAKL - ORD
2 stops22h 01mAir Canada
Deal found 12/3$901
This American Airlines deal was found by Cheapflights users on 12/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:17 pmORD - AKL
1 stop20h 38mAmerican Airlines
Wed 12/171:20 pmAKL - ORD
1 stop20h 59mAmerican Airlines
Deal found 12/2$911

Find 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 December 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$840
(American Airlines)

One-way from

$300
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,349
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
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From Illinois to South Pacific
Search Deals
One-way flight from Illinois to South Pacific
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($162 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 4, 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

Thu 2/5

11:20 am-9:10 am

2 stops26h 50m

Auckland Intl

Thu 2/12

3:50 pm-4:58 pm

2 stops20h 08m

$851

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Wed 1/28

2:40 pm-9:10 am

1 stop23h 30m

Auckland Intl

Wed 2/11

3:50 pm-4:57 pm

1 stop20h 07m

$861

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Tue 2/24

6:17 pm-9:10 am

1 stop19h 53m

Auckland Intl

Mon 3/9

2:50 pm-6:51 pm

1 stop22h 01m

$861

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Wed 1/28

4:16 pm-9:10 am

1 stop21h 54m

Auckland Intl

Tue 2/10

3:50 pm-11:14 pm

1 stop26h 24m

$861

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Wed 2/25

6:17 pm-9:10 am

1 stop19h 53m

Auckland Intl

Tue 3/3

3:50 pm-6:41 pm

1 stop21h 51m

$861

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Wed 3/4

4:20 pm-9:10 am

1 stop21h 50m

Auckland Intl

Wed 3/11

2:50 pm-6:19 am

1 stop33h 29m

$872

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Sun 2/8

5:20 pm-9:10 am

1 stop20h 50m

Auckland Intl

Fri 2/13

3:50 pm-11:48 pm

1 stop26h 58m

$912

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Thu 1/29

3:10 pm-9:55 am

1 stop23h 45m

Auckland Intl

Sun 2/8

3:50 pm-4:49 pm

1 stop19h 59m

$913

ChicagoAuckland

ORD - AKL

ORDAKL

Chicago O'Hare Intl

Thu 2/26

7:47 pm-9:55 am

1 stop19h 08m

Auckland Intl

Wed 3/4

3:50 pm-5:36 pm

1 stop20h 46m

$913

St. LouisAuckland

STL - AKL

STLAKL

Lambert-St Louis

Sat 2/7

7:04 am-9:55 am

1 stop31h 51m

Auckland Intl

Mon 2/16

3:50 pm-11:48 pm

1 stop26h 58m

$923

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 $783). 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 December 4, 2025.

It’s typically best to fly out from Illinois to South Pacific at noon. Doing so could potentially save you 26% 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 at noon 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 50m. Fly via United Airlines, Qantas Airways, or Air Canada 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?

    $304 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on Qantas Airways and American Airlines, with prices starting from $344 and $350, 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 $783). 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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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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$307Average$1,538FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$663Average$1,223FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$675Average$1,166FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,196FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$1,353FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$712Average$1,321FlexibilityNo cancel feeOn-time74%
DeltaCheapest$935Average$1,034FlexibilityNo cancel feeOn-timeN/A
Air Tahiti NuiCheapest$1,051Average$1,442FlexibilityNo cancel feeOn-time73%
Air New ZealandCheapest$1,154Average$1,577FlexibilityNo cancel feeOn-time78%
Qatar AirwaysCheapest$1,229Average$1,775FlexibilityNo cancel feeOn-time68%

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