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$441+ Cheap flights from Australia to Illinois

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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Australia to Illinois

Keep the following information in mind while searching for Australia to Illinois flight deals. Data was last updated April 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$914
(Trip.com)

One-way from

$441
(Mytrip)

Popular in

December

Cheapest in

March

Average price

$841
Provider with most accurate pricing for Sydney Kingsford Smith-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Chicago (CHI) flights.
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From Australia to Illinois
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One-way flight from Australia to Illinois
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Australia to Illinois

Cheapest flights from Australia to Illinois
Explore the most affordable flight options available from Australia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/81:15 pmSYD - ORD
2 stops33h 30mMultiple Airlines
Thu 5/157:00 amORD - SYD
2 stops38h 15mMultiple Airlines
Deal found 4/16$914
This Trip.com deal was found by Cheapflights users on 4/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:35 amBNE - ORD
2 stops34h 07mMultiple Airlines
Wed 5/218:37 amORD - BNE
2 stops34h 58mMultiple Airlines
Deal found 4/17$942
This EVA Air deal was found by Cheapflights users on 4/16. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:15 pmBNE - ORD
1 stop37h 30mEVA Air
Sat 10/1812:30 amORD - BNE
1 stop28h 30mEVA Air
Deal found 4/16$1,024
This Aunt Betty deal was found by Cheapflights users on 4/16. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/59:55 amSYD - ORD
2 stops26h 23mAir New Zealand
Tue 8/124:50 pmORD - SYD
2 stops24h 55mAir New Zealand
Deal found 4/16$1,025
This BYOjet deal was found by Cheapflights users on 4/17. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1211:55 pmBNE - ORD
1 stop29h 30mCathay Pacific
Sun 6/224:00 pmORD - BNE
1 stop28h 05mCathay Pacific
Deal found 4/17$1,053
This Qantas Airways deal was found by Cheapflights users on 4/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/133:00 pmSYD - ORD
2 stops38h 15mQantas Airways
Mon 6/239:59 amORD - SYD
2 stops32h 46mQantas Airways
Deal found 4/16$1,089
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/812:55 pmMEL - ORD
3 stops34h 55mMultiple Airlines
Fri 5/96:59 pmORD - MEL
2 stops25h 31mMultiple Airlines
Deal found 4/17$1,109
This Qantas Airways deal was found by Cheapflights users on 4/17. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/109:15 amBNE - ORD
2 stops35h 55mQantas Airways
Mon 6/239:59 amORD - BNE
1 stop28h 26mQantas Airways
Deal found 4/17$1,208
This Qantas Airways deal was found by Cheapflights users on 4/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:00 amADL - ORD
2 stops24h 45mQantas Airways
Sat 1/174:45 pmORD - ADL
2 stops26h 15mQantas Airways
Deal found 4/16$1,219
This Jettzy deal was found by Cheapflights users on 4/16. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1611:50 amSYD - ORD
2 stops32h 01mANA
Mon 7/145:45 pmORD - SYD
1 stop34h 30mANA
Deal found 4/16$1,227
This BYOjet deal was found by Cheapflights users on 4/17. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1411:55 amMEL - ORD
1 stop21h 54mQantas Airways
Fri 10/241:30 pmORD - MEL
2 stops28h 50mQantas Airways
Deal found 4/17$1,245
This Japan Airlines deal was found by Cheapflights users on 4/17. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:25 pmPER - ORD
2 stops40h 20mJapan Airlines
Sun 9/71:05 amORD - PER
2 stops34h 35mJapan Airlines
Deal found 4/17$1,266

Cheapflights Fare Finder

Customize your flight search to find flights from Australia to Illinois 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 April 17, 2025.
Use the filters below to find and compare flights from Australia to Illinois that are best for you.

Fly from

Australia

Fly to

Illinois

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/8

1:15 pm-7:45 am

2 stops33h 30m

Chicago O'Hare Intl

Thu 5/15

7:00 am-12:15 pm

2 stops38h 15m

$914

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Wed 5/14

11:35 am-6:42 am

2 stops34h 07m

Chicago O'Hare Intl

Wed 5/21

8:37 am-10:35 am

2 stops34h 58m

$942

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 10/9

10:15 pm-8:45 pm

1 stop37h 30m

Chicago O'Hare Intl

Sat 10/18

12:30 am-8:00 pm

1 stop28h 30m

$1,024

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 6/12

11:55 pm-2:25 pm

1 stop29h 30m

Chicago O'Hare Intl

Sun 6/22

4:00 pm-11:05 am

1 stop28h 05m

$1,053

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Thu 5/8

12:55 pm-8:50 am

3 stops34h 55m

Chicago O'Hare Intl

Fri 5/9

6:59 pm-11:30 am

2 stops25h 31m

$1,109

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/14

12:50 pm-2:55 pm

1 stop42h 05m

Chicago O'Hare Intl

Fri 10/24

7:10 am-8:15 pm

2 stops45h 05m

$1,206

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 6/10

9:15 am-6:10 am

2 stops35h 55m

Chicago O'Hare Intl

Mon 6/23

9:59 am-5:25 am

1 stop28h 26m

$1,208

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/14

10:10 am-7:40 pm

1 stop25h 30m

Chicago O'Hare Intl

Fri 10/24

2:45 pm-9:50 am

2 stops27h 05m

$1,225

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Tue 10/14

11:55 am-5:49 pm

1 stop21h 54m

Chicago O'Hare Intl

Fri 10/24

1:30 pm-10:20 am

2 stops28h 50m

$1,245

PerthChicago

PER - ORD

PERORD

Perth

Wed 9/3

12:25 pm-3:45 pm

2 stops40h 20m

Chicago O'Hare Intl

Sun 9/7

1:05 am-12:40 am

2 stops34h 35m

$1,266

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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

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

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

Currently, August is the cheapest month in which you can book a flight from Australia to Illinois (average of $245). Flying from Australia to Illinois in March is currently the most expensive (average of $321). 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 AU to IL?

Find hourly flight availability from Australia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

When flying from Australia to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 17, 2025.
Read through reviews of airlines operating flights from Australia to Illinois, such as Air Tahiti Nui, EVA Air and Korean Air. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
EVA Air
8.4
Very good
1,177 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Korean Air
8.4
Very good
1,064 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very good
1,443 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.3
Very good
844 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Crew

9.1

Overall

8.8

Food

7.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Australia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    One-way options have recently been found by users for as low as $649 on EVA Air. Other airlines that offer cheap prices include Cathay Pacific from $652 and Etihad Airways from $661 one-way.

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

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

  • How can I find direct flights from Australia to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Australia to Illinois 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 Australia to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Australia to Illinois (average of $245). Flying from Australia to Illinois in March is currently the most expensive (average of $321). 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 Australia to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Australia to Illinois

Discover the top 3 airlines that operate flights from Australia to Illinois. 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$894FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,272FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,080Average$1,489FlexibilityNo cancel feeOn-time69%

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