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South Pacific

$419+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$768
(Air Canada)

One-way from

$419
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$907
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. 17% potential increase in price ($197 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 20, 2025.

This Gotogate deal was found by Cheapflights users on 10/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/73:40 pmORD - SYD
1 stop24h 55mAir Canada
Tue 12/2311:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/20$770
This Expedia deal was found by Cheapflights users on 10/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:20 amORD - SYD
2 stops33h 15mAir Canada
Sun 12/2111:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/18$777
This Orbitz deal was found by Cheapflights users on 10/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/93:40 pmORD - SYD
1 stop24h 55mAir Canada
Sun 2/88:00 amSYD - ORD
2 stops23h 41mAir Canada
Deal found 10/19$778
This Orbitz deal was found by Cheapflights users on 10/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/73:40 pmORD - SYD
1 stop24h 55mMultiple Airlines
Sat 12/276:35 pmSYD - ORD
2 stops37h 06mMultiple Airlines
Deal found 10/19$791
This CrystalTravel deal was found by Cheapflights users on 10/19. 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 11/263:04 pmORD - SYD
1 stop24h 56mQantas Airways
Tue 12/165:45 pmSYD - ORD
1 stop20h 40mQantas Airways
Deal found 10/19$793
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
Mon 10/203:14 pmORD - SYD
1 stop24h 51mQantas Airways
Thu 10/239:30 pmSYD - ORD
1 stop24h 04mQantas Airways
Deal found 10/19$796
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
Thu 10/233:14 pmORD - SYD
1 stop24h 51mQantas Airways
Sat 10/2510:10 amSYD - ORD
1 stop21h 55mQantas Airways
Deal found 10/19$799
This Expedia deal was found by Cheapflights users on 10/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:40 pmORD - SYD
1 stop24h 55mMultiple Airlines
Tue 12/167:45 amSYD - ORD
2 stops25h 59mMultiple Airlines
Deal found 10/18$801
This Air Canada deal was found by Cheapflights users on 10/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/183:40 pmORD - SYD
1 stop24h 55mAir Canada
Thu 2/511:20 amSYD - ORD
1 stop22h 22mAir Canada
Deal found 10/19$805
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
Sat 11/17:01 pmORD - MEL
2 stops25h 39mQantas Airways
Tue 2/107:45 amMEL - ORD
2 stops24h 12mQantas Airways
Deal found 10/19$1,010
This CrystalTravel deal was found by Cheapflights users on 10/18. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:30 pmORD - AKL
2 stops33h 55mQantas Airways
Sat 11/156:00 amAKL - ORD
2 stops36h 07mQantas Airways
Deal found 10/18$1,011
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
Thu 10/307:01 pmORD - MEL
2 stops27h 04mQantas Airways
Sat 11/157:25 amMEL - ORD
2 stops26h 23mQantas Airways
Deal found 10/19$1,012

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 October 20, 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

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 10/29

8:30 pm-9:00 am

1 stop20h 30m

Sydney Kingsford Smith

Wed 11/12

5:45 pm-11:59 pm

1 stop23h 14m

$844

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 11/9

3:00 pm-9:00 am

1 stop25h 00m

Sydney Kingsford Smith

Sun 2/8

5:45 pm-11:59 pm

1 stop23h 14m

$844

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 12/29

3:13 pm-9:00 am

1 stop24h 47m

Sydney Kingsford Smith

Tue 2/3

5:45 pm-9:23 pm

1 stop20h 38m

$845

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 10/24

7:01 pm-8:05 am

1 stop21h 04m

Sydney Kingsford Smith

Mon 11/3

11:20 am-3:55 pm

1 stop21h 35m

$847

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 12/24

1:39 pm-9:00 am

1 stop26h 21m

Sydney Kingsford Smith

Sat 1/24

5:45 pm-11:59 pm

1 stop23h 14m

$847

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 12/31

4:20 pm-6:20 am

1 stop21h 00m

Sydney Kingsford Smith

Tue 2/3

12:10 pm-7:51 pm

1 stop24h 41m

$863

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 12/30

4:20 pm-6:20 am

1 stop21h 00m

Sydney Kingsford Smith

Mon 2/2

12:10 pm-5:01 pm

1 stop21h 51m

$863

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 12/31

4:20 pm-6:20 am

1 stop21h 00m

Sydney Kingsford Smith

Mon 2/2

11:50 am-2:40 pm

1 stop19h 50m

$863

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 12/27

4:34 pm-9:00 am

1 stop23h 26m

Sydney Kingsford Smith

Tue 2/3

11:20 am-2:57 pm

1 stop20h 37m

$869

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 12/29

1:39 pm-9:00 am

1 stop26h 21m

Sydney Kingsford Smith

Thu 2/5

11:20 am-2:57 pm

1 stop20h 37m

$869

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

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 February is currently the most expensive (average of $680). 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 October 20, 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 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 30m. Fly via Qantas Airways, United Airlines, or Delta to get the fastest option. The distance from Illinois to South Pacific is about 9228 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?

    $423 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Qantas Airways and Fiji Airways, with prices starting from $426 and $756, 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 February is currently the most expensive (average of $680). 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$307Average$1,476FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$465Average$1,244FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$630Average$1,177FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,193FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$1,434FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$712Average$1,391FlexibilityNo cancel feeOn-time74%
DeltaCheapest$846Average$1,018FlexibilityNo cancel feeOn-timeN/A
Air Tahiti NuiCheapest$1,051Average$1,378FlexibilityNo cancel feeOn-time73%
Qatar AirwaysCheapest$1,229Average$1,331FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,264Average$1,578FlexibilityNo cancel feeOn-time78%

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