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$482+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
May 4 — May 111
Sun 5/4
Sun 5/11
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 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,032
(Trip.com)

One-way from

$482
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$849
Provider with most accurate pricing for Sydney Kingsford Smith-Chicago (CHI) flight deals.
Search Deals
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 ($208 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 29, 2025.

This Trip.com deal was found by Cheapflights users on 4/29. 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.
Fri 6/136:15 amSYD - ORD
2 stops31h 50mMultiple Airlines
Fri 6/206:10 amORD - SYD
2 stops38h 35mMultiple Airlines
Deal found 4/29$1,032
This Aunt Betty deal was found by Cheapflights users on 4/29. 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 5/2011:55 pmBNE - ORD
1 stop29h 30mCathay Pacific
Tue 7/224:00 pmORD - BNE
1 stop28h 05mCathay Pacific
Deal found 4/29$1,055
This Booking.com deal was found by Cheapflights users on 4/28. 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.
Sat 11/19:45 amBNE - ORD
2 stops21h 51mAir Canada
Fri 11/1411:45 amORD - BNE
2 stops28h 55mAir Canada
Deal found 4/28$1,075
This FlightHub deal was found by Cheapflights users on 4/29. 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.
Thu 9/1111:50 amSYD - ORD
1 stop35h 50mANA
Mon 9/158:20 pmORD - SYD
2 stops31h 55mANA
Deal found 4/29$1,093
This Cathay Pacific deal was found by Cheapflights users on 4/29. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/36:05 pmBNE - ORD
2 stops35h 20mMultiple Airlines
Fri 8/154:00 pmORD - BNE
2 stops41h 10mMultiple Airlines
Deal found 4/29$1,144
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 6/249:10 amSYD - ORD
2 stops24h 25mAmerican Airlines
Tue 7/294:39 pmORD - SYD
2 stops23h 26mAmerican Airlines
Deal found 4/29$1,195
This American Airlines deal was found by Cheapflights users on 4/29. 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 6/99:45 amMEL - ORD
1 stop28h 50mAmerican Airlines
Fri 6/208:05 amORD - MEL
1 stop29h 55mAmerican Airlines
Deal found 4/29$1,206
This BYOjet deal was found by Cheapflights users on 4/29. 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 10/17:45 amSYD - ORD
2 stops29h 56mAir New Zealand
Fri 10/102:20 pmORD - SYD
2 stops26h 25mAir New Zealand
Deal found 4/29$1,214
This Gotogate deal was found by Cheapflights users on 4/28. 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.
Thu 6/128:55 amSYD - ORD
1 stop39h 20mJapan Airlines
Wed 6/181:30 amORD - SYD
1 stop37h 50mJapan Airlines
Deal found 4/28$1,228
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Sat 10/1110:20 amSYD - ORD
1 stop22h 22mAir Canada
Tue 10/218:40 amORD - SYD
2 stops31h 40mAir Canada
Deal found 4/28$1,238
This CheapTickets deal was found by Cheapflights users on 4/29. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/131:40 pmMEL - ORD
2 stops24h 25mMultiple Airlines
Fri 6/206:10 amORD - MEL
2 stops38h 45mMultiple Airlines
Deal found 4/29$1,246
This Expedia deal was found by Cheapflights users on 4/28. 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.
Tue 7/2212:25 pmPER - ORD
2 stops33h 50mJapan Airlines
Sun 7/2712:30 pmORD - PER
2 stops47h 10mJapan Airlines
Deal found 4/28$1,270

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 29, 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

Fri 6/13

6:15 am-11:05 pm

2 stops31h 50m

Chicago O'Hare Intl

Fri 6/20

6:10 am-11:45 am

2 stops38h 35m

$1,032

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 5/20

11:55 pm-2:25 pm

1 stop29h 30m

Chicago O'Hare Intl

Tue 7/22

4:00 pm-11:05 am

1 stop28h 05m

$1,055

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Sun 8/3

6:05 pm-2:25 pm

2 stops35h 20m

Chicago O'Hare Intl

Fri 8/15

4:00 pm-12:10 am

2 stops41h 10m

$1,144

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 6/24

11:50 am-8:25 pm

2 stops47h 35m

Chicago O'Hare Intl

Tue 7/29

5:45 pm-7:15 pm

1 stop34h 30m

$1,184

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 6/24

9:10 am-6:35 pm

2 stops24h 25m

Chicago O'Hare Intl

Tue 7/29

4:39 pm-7:05 am

2 stops23h 26m

$1,195

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 6/9

9:45 am-11:35 pm

1 stop28h 50m

Chicago O'Hare Intl

Fri 6/20

8:05 am-5:00 am

1 stop29h 55m

$1,206

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 6/12

8:55 am-9:15 am

1 stop39h 20m

Chicago O'Hare Intl

Wed 6/18

1:30 am-6:20 am

1 stop37h 50m

$1,228

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 6/13

1:40 pm-11:05 pm

2 stops24h 25m

Chicago O'Hare Intl

Fri 6/20

6:10 am-11:55 am

2 stops38h 45m

$1,246

PerthChicago

PER - ORD

PERORD

Perth

Tue 7/22

12:25 pm-9:15 am

2 stops33h 50m

Chicago O'Hare Intl

Sun 7/27

12:30 pm-12:40 am

2 stops47h 10m

$1,270

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

9:30 am-6:53 pm

2 stops24h 23m

Lambert-St Louis

Sat 11/8

7:00 pm-9:15 am

1 stop21h 15m

$1,294

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 29, 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 29, 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

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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
1,186 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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
1,066 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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
1,459 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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
852 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Overall

8.8

Crew

9.1

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 $648 on Cathay Pacific. Other airlines that offer cheap prices include EVA Air from $664 and American Airlines from $694 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 4 airlines flying from Australia to Illinois

Discover the top 4 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$894FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,272FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$985Average$1,247FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,080Average$1,475FlexibilityNo cancel feeOn-time69%

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