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Illinois

$363+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$950
(Air Canada)

One-way from

$363
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$866
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. 14% potential increase in price ($182 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($42 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 1, 2025.

This Trip.com deal was found by Cheapflights users on 4/1. 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 4/1012:55 pmMEL - MDW
2 stops24h 32mMultiple Airlines
Thu 4/174:31 pmMDW - MEL
2 stops27h 59mMultiple Airlines
Deal found 4/1$941
This Air Canada deal was found by Cheapflights users on 3/30. 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 6/1010:20 amBNE - ORD
2 stops41h 25mAir Canada
Tue 6/1710:40 amORD - BNE
2 stops29h 25mAir Canada
Deal found 3/30$950
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/229:20 amSYD - ORD
2 stops44h 45mAir Canada
Wed 6/43:35 pmORD - SYD
1 stop24h 45mAir Canada
Deal found 3/31$1,034
This Mytrip deal was found by Cheapflights users on 4/1. 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 4/1012:55 pmMEL - ORD
3 stops31h 50mMultiple Airlines
Thu 4/1711:53 amORD - MEL
2 stops32h 37mMultiple Airlines
Deal found 4/1$1,044
This BYOjet deal was found by Cheapflights users on 3/31. 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 10/96:30 amMEL - ORD
3 stops28h 59mAir Canada
Mon 10/203:40 pmORD - MEL
2 stops28h 55mAir Canada
Deal found 3/31$1,070
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/149:20 amSYD - STL
2 stops49h 23mAir Canada
Wed 5/218:48 amSTL - SYD
2 stops31h 32mAir Canada
Deal found 3/31$1,085
This Mytrip deal was found by Cheapflights users on 4/1. 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.
Fri 5/26:00 amSYD - ORD
3 stops38h 45mMultiple Airlines
Fri 5/99:08 pmORD - SYD
3 stops47h 37mMultiple Airlines
Deal found 4/1$1,105
This BYOjet deal was found by Cheapflights users on 3/31. 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.
Wed 10/812:45 amMEL - ORD
1 stop29h 40mCathay Pacific
Mon 10/204:00 pmORD - MEL
1 stop28h 15mCathay Pacific
Deal found 3/31$1,161
This Gurufare deal was found by Cheapflights users on 3/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/17:40 amSYD - ORD
1 stop45h 45mCathay Pacific
Mon 5/54:00 pmORD - SYD
1 stop27h 50mCathay Pacific
Deal found 3/31$1,268
This BYOjet deal was found by Cheapflights users on 3/31. 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.
Wed 9/312:25 pmPER - ORD
2 stops33h 40mJapan Airlines
Sun 9/71:05 amORD - PER
2 stops34h 35mJapan Airlines
Deal found 3/31$1,283
This United Airlines deal was found by Cheapflights users on 3/31. 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 6/1810:55 amMEL - ORD
1 stop21h 07mUnited Airlines
Tue 6/249:40 pmORD - MEL
1 stop42h 50mUnited Airlines
Deal found 3/31$1,295
This United deal was found by Cheapflights users on 3/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:20 amSYD - STL
1 stop21h 25mUnited Airlines
Sat 11/83:15 pmSTL - SYD
2 stops46h 45mUnited Airlines
Deal found 3/31$1,317

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 1, 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

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 6/10

10:20 am-12:45 pm

2 stops41h 25m

Chicago O'Hare Intl

Tue 6/17

10:40 am-7:05 am

2 stops29h 25m

$950

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/22

9:20 am-3:05 pm

2 stops44h 45m

Chicago O'Hare Intl

Wed 6/4

3:35 pm-7:20 am

1 stop24h 45m

$1,034

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/14

9:20 am-7:43 pm

2 stops49h 23m

Lambert-St Louis

Wed 5/21

8:48 am-7:20 am

2 stops31h 32m

$1,085

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 5/2

6:00 am-5:45 am

3 stops38h 45m

Chicago O'Hare Intl

Fri 5/9

9:08 pm-11:45 am

3 stops47h 37m

$1,105

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Tue 8/12

6:00 am-2:49 pm

2 stops23h 49m

Chicago O'Hare Intl

Mon 12/22

3:40 pm-3:45 pm

2 stops31h 05m

$1,191

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Thu 7/24

6:00 am-2:49 pm

2 stops23h 49m

Chicago O'Hare Intl

Sun 7/27

3:35 pm-11:05 am

2 stops28h 30m

$1,255

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/1

7:40 am-2:25 pm

1 stop45h 45m

Chicago O'Hare Intl

Mon 5/5

4:00 pm-10:50 am

1 stop27h 50m

$1,268

PerthChicago

PER - ORD

PERORD

Perth

Wed 9/3

12:25 pm-9:05 am

2 stops33h 40m

Chicago O'Hare Intl

Sun 9/7

1:05 am-12:40 am

2 stops34h 35m

$1,283

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 6/18

10:55 am-5:02 pm

1 stop21h 07m

Chicago O'Hare Intl

Tue 6/24

9:40 pm-7:30 am

1 stop42h 50m

$1,295

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

10:20 am-4:45 pm

1 stop21h 25m

Lambert-St Louis

Sat 11/8

3:15 pm-7:00 am

2 stops46h 45m

$1,317

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 $323). 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 1, 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 1, 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
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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
8.7
Very good
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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
1,170 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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
1,052 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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
1,440 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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
830 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Overall

8.7

Entertainment

7.2

Crew

9.1

Food

7.8

Comfort

8.0

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 $703 on EVA Air. Other airlines that offer cheap prices include Cathay Pacific from $787 and Air Canada from $890 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 $323). 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 1, 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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