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$446+ 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 3/20. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
févr. 26 — mars 51
mer. 2/26
mer. 3/5
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 février 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$711
(BestPriceTravel)

One-way from

$446
(Qantas Airways)

Popular in

December

Cheapest in

February

Average price

$857
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
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Highest demand for flights based on searches. 11% potential increase in price ($141 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in February 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 février 21, 2025.

This BestPriceTravel deal was found by Cheapflights users on 2/19. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/311:15 amSYD - ORD
1 stop21h 35mQantas Airways
sam. 8/1611:50 amORD - SYD
1 stop28h 15mQantas Airways
Deal found 2/19$711
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 2/2811:15 amSYD - ORD
2 stops26h 27mAmerican Airlines
jeu. 3/138:20 pmORD - SYD
1 stop20h 40mAmerican Airlines
Deal found 2/19$760
This BestPriceTravel deal was found by Cheapflights users on 2/20. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 3/66:20 amSYD - ORD
2 stops24h 41mMultiple Airlines
ven. 3/148:20 pmORD - SYD
1 stop20h 40mMultiple Airlines
Deal found 2/20$828
This BestPriceTravel deal was found by Cheapflights users on 2/20. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 4/95:10 pmBNE - ORD
2 stops37h 46mMultiple Airlines
jeu. 4/247:20 pmORD - BNE
2 stops24h 30mMultiple Airlines
Deal found 2/20$917
This Jettzy deal was found by Cheapflights users on 2/20. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 8/289:20 amSYD - ORD
1 stop20h 29mAir Canada
dim. 9/218:25 pmORD - SYD
2 stops43h 55mAir Canada
Deal found 2/20$996
This Mytrip deal was found by Cheapflights users on 2/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/51:45 pmMEL - ORD
3 stops31h 48mMultiple Airlines
mer. 7/305:45 pmORD - MEL
2 stops38h 50mMultiple Airlines
Deal found 2/19$1,003
This Priceline deal was found by Cheapflights users on 2/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 4/59:00 pmMEL - ORD
2 stops34h 56mQantas Airways
sam. 4/123:17 pmORD - MEL
1 stop24h 28mQantas Airways
Deal found 2/20$1,015
This Justfly.com deal was found by Cheapflights users on 2/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/188:45 pmBNE - ORD
2 stops34h 10mQantas Airways
lun. 8/45:03 pmORD - BNE
2 stops26h 37mQantas Airways
Deal found 2/20$1,029
This BestPriceTravel deal was found by Cheapflights users on 2/20. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 3/61:00 pmMEL - ORD
1 stop21h 00mUnited Airlines
jeu. 3/133:55 pmORD - MEL
1 stop24h 35mUnited Airlines
Deal found 2/20$1,062
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/79:30 amSYD - ORD
1 stop25h 55mUnited Airlines
mar. 5/202:35 pmORD - SYD
2 stops25h 20mUnited Airlines
Deal found 2/20$1,095
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/129:30 amSYD - STL
2 stops42h 15mUnited Airlines
sam. 5/318:25 amSTL - SYD
2 stops55h 35mUnited Airlines
Deal found 2/20$1,097
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/1810:00 amBNE - ORD
1 stop34h 38mAir Canada
lun. 8/48:40 amORD - BNE
2 stops31h 25mAir Canada
Deal found 2/20$1,097

Find flights from Australia to Illinois within your budget

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 février 21, 2025.

Fly from

Australia

Fly to

Illinois

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

lun. 3/3

11:15 am-3:50 pm

1 stop21h 35m

Chicago O'Hare Intl

sam. 8/16

11:50 am-7:05 am

1 stop28h 15m

$711

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

jeu. 3/6

6:20 am-2:01 pm

2 stops24h 41m

Chicago O'Hare Intl

ven. 3/14

8:20 pm-9:00 am

1 stop20h 40m

$828

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

mer. 4/9

5:10 pm-3:56 pm

2 stops37h 46m

Chicago O'Hare Intl

jeu. 4/24

7:20 pm-10:50 am

2 stops24h 30m

$917

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

jeu. 3/6

11:50 am-4:19 pm

2 stops21h 29m

Chicago O'Hare Intl

jeu. 3/13

8:20 pm-9:00 am

1 stop20h 40m

$973

MelbourneChicago

MEL - ORD

MELORD

Melbourne

lun. 5/5

1:45 pm-6:33 am

3 stops31h 48m

Chicago O'Hare Intl

mer. 7/30

5:45 pm-11:35 pm

2 stops38h 50m

$1,003

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

mar. 5/6

9:20 am-4:48 pm

2 stops46h 28m

Chicago O'Hare Intl

mar. 5/20

10:00 am-7:20 am

2 stops30h 20m

$1,005

MelbourneChicago

MEL - ORD

MELORD

Melbourne

sam. 4/5

9:00 pm-3:56 pm

2 stops34h 56m

Chicago O'Hare Intl

sam. 4/12

3:17 pm-6:45 am

1 stop24h 28m

$1,015

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

ven. 7/18

8:45 pm-3:55 pm

2 stops34h 10m

Chicago O'Hare Intl

lun. 8/4

5:03 pm-10:40 am

2 stops26h 37m

$1,029

MelbourneChicago

MEL - ORD

MELORD

Melbourne

jeu. 3/6

1:00 pm-5:00 pm

1 stop21h 00m

Chicago O'Hare Intl

jeu. 3/13

3:55 pm-8:30 am

1 stop24h 35m

$1,062

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

mer. 5/7

9:30 am-8:25 pm

1 stop25h 55m

Chicago O'Hare Intl

mar. 5/20

2:35 pm-6:55 am

2 stops25h 20m

$1,095

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Australia to Illinois

Get recent, data-driven insights about flights from Australia to Illinois including ideal travel times, pricing trends, and more.

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 février 21, 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 février 21, 2025.
Read through reviews of airlines operating flights from Australia to Illinois, such as Air Tahiti Nui, EVA Air and ANA. 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

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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
1,200 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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
8.4
Very good
842 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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
1,037 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Boarding

8.7

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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

Comfort

8.0

Entertainment

7.2

Crew

9.1

Overall

8.7

Food

7.8

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 $446 on Qantas Airways. Other airlines that offer cheap prices include American Airlines from $460 and Cathay Pacific from $799 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 février 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$956FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$851Average$1,264FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$964Average$1,549FlexibilityNo cancel feeOn-time69%
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