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Illinois

$499+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$954
(Gotogate)

One-way from

$499
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$1,087
From Australia to Illinois
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One-way flight from Australia to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($250 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Gotogate deal was found by Cheapflights users on 6/9. 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.
lun. 7/2111:55 pmBNE - ORD
1 stop29h 30mCathay Pacific
lun. 7/284:00 pmORD - BNE
1 stop28h 05mCathay Pacific
Deal found 6/9$954
This Trip.com deal was found by Cheapflights users on 6/12. 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.
jue. 8/141:15 pmSYD - ORD
2 stops24h 31mMultiple Airlines
jue. 9/46:20 amORD - SYD
2 stops38h 55mMultiple Airlines
Deal found 6/12$1,046
This Cathay Pacific deal was found by Cheapflights users on 6/10. 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.
lun. 7/2111:55 pmBNE - ORD
1 stop29h 30mMultiple Airlines
lun. 7/284:00 pmORD - BNE
2 stops46h 15mMultiple Airlines
Deal found 6/10$1,065
This BYOjet deal was found by Cheapflights users on 6/12. 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.
vie. 11/1412:05 pmMEL - ORD
2 stops24h 51mAir New Zealand
vie. 11/283:43 pmORD - MEL
2 stops26h 07mAir New Zealand
Deal found 6/12$1,086
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/219:25 amSYD - MDW
2 stops23h 14mDelta
lun. 8/1812:43 pmMDW - SYD
2 stops26h 52mDelta
Deal found 6/12$1,093
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/219:25 amSYD - ORD
2 stops22h 25mDelta
mié. 8/202:15 pmORD - SYD
2 stops25h 20mDelta
Deal found 6/12$1,093
This FlightHub deal was found by Cheapflights users on 6/12. 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.
vie. 6/138:55 pmSYD - ORD
1 stop26h 45mANA
jue. 7/319:05 amORD - SYD
2 stops43h 10mANA
Deal found 6/12$1,098
This American Airlines deal was found by Cheapflights users on 6/12. 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.
vie. 11/1412:00 pmMEL - ORD
1 stop41h 06mAmerican Airlines
vie. 11/282:25 pmORD - MEL
2 stops29h 10mAmerican Airlines
Deal found 6/12$1,121
This United Airlines deal was found by Cheapflights users on 6/11. 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.
lun. 8/189:30 amSYD - STL
2 stops22h 01mUnited Airlines
sáb. 11/84:35 pmSTL - SYD
1 stop21h 25mUnited Airlines
Deal found 6/11$1,129
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 8/49:10 amSYD - ORD
1 stop23h 32mAmerican Airlines
lun. 8/256:00 amORD - SYD
1 stop34h 05mAmerican Airlines
Deal found 6/12$1,129
This Mytrip deal was found by Cheapflights users on 6/11. 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.
sáb. 7/199:35 pmPER - ORD
1 stop30h 20mANA
mié. 7/307:40 pmORD - PER
2 stops59h 20mANA
Deal found 6/11$1,133
This Trip.com deal was found by Cheapflights users on 6/10. 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.
lun. 7/2110:15 pmBNE - ORD
1 stop37h 55mEVA Air
dom. 7/2712:30 amORD - BNE
1 stop28h 30mEVA Air
Deal found 6/10$1,133

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 junio 12, 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

lun. 7/21

11:55 pm-2:25 pm

1 stop29h 30m

Chicago O'Hare Intl

lun. 7/28

4:00 pm-11:05 am

1 stop28h 05m

$954

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

jue. 8/14

1:15 pm-10:46 pm

2 stops24h 31m

Chicago O'Hare Intl

jue. 9/4

6:20 am-12:15 pm

2 stops38h 55m

$1,046

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

lun. 7/21

11:55 pm-2:25 pm

1 stop29h 30m

Chicago O'Hare Intl

lun. 7/28

4:00 pm-5:15 am

2 stops46h 15m

$1,065

MelbourneChicago

MEL - ORD

MELORD

Melbourne

vie. 11/14

12:05 pm-7:56 pm

2 stops24h 51m

Chicago O'Hare Intl

vie. 11/28

3:43 pm-10:50 am

2 stops26h 07m

$1,086

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

lun. 7/21

9:25 am-5:39 pm

2 stops23h 14m

Chicago Midway

lun. 8/18

12:43 pm-6:35 am

2 stops26h 52m

$1,093

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

lun. 7/21

9:25 am-4:50 pm

2 stops22h 25m

Chicago O'Hare Intl

mié. 8/20

2:15 pm-6:35 am

2 stops25h 20m

$1,093

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

lun. 8/4

8:55 pm-8:40 am

1 stop26h 45m

Chicago O'Hare Intl

lun. 8/25

8:20 pm-7:15 pm

2 stops31h 55m

$1,115

MelbourneChicago

MEL - ORD

MELORD

Melbourne

vie. 11/14

12:00 pm-12:06 pm

1 stop41h 06m

Chicago O'Hare Intl

vie. 11/28

2:25 pm-12:35 pm

2 stops29h 10m

$1,121

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

10:20 am-4:45 pm

1 stop21h 25m

Lambert-St Louis

sáb. 11/8

11:10 am-7:00 am

1 stop26h 50m

$1,129

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

lun. 8/4

9:10 am-5:42 pm

1 stop23h 32m

Chicago O'Hare Intl

lun. 8/25

6:00 am-7:05 am

1 stop34h 05m

$1,129

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 junio 12, 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 junio 12, 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
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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
1,202 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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
1,088 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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
1,490 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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
882 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Food

7.8

Crew

9.0

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 $666 on Cathay Pacific. Other airlines that offer cheap prices include Air Canada from $706 and United Airlines from $727 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$894FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,243FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$985Average$1,247FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,080Average$1,463FlexibilityNo cancel feeOn-time69%

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