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$358+ Cheap flights from Illinois to Australia

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Illinois to Australia

Keep the following information in mind while searching for Illinois to Australia flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$805
(Justfly.com)

One-way from

$358
(Yatra.com)

Popular in

December

Cheapest in

August

Average price

$935
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
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From Illinois to Australia
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One-way flight from Illinois to Australia
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Highest demand for flights based on searches. 9% potential increase in price ($117 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 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 Illinois to Australia

Cheapest flights from Illinois to Australia
Explore the most affordable flight options available from Illinois to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/238:50 amORD - BNE
1 stop28h 10mQantas Airways
Tue 2/259:40 amBNE - ORD
1 stop21h 43mQantas Airways
Deal found 2/19$805
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.
Sat 3/88:20 pmORD - SYD
1 stop42h 05mQantas Airways
Sun 3/1611:15 amSYD - ORD
1 stop28h 44mQantas Airways
Deal found 2/20$821
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.
Fri 3/289:45 amORD - BNE
1 stop28h 15mAmerican Airlines
Sun 4/610:00 pmBNE - ORD
1 stop22h 14mAmerican Airlines
Deal found 2/19$821
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.
Sun 4/139:45 amORD - SYD
1 stop29h 50mAmerican Airlines
Tue 6/35:35 pmSYD - ORD
1 stop20h 08mAmerican Airlines
Deal found 2/19$823
This Flighttix 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/238:31 amORD - SYD
1 stop28h 39mIberia
Sun 3/911:50 amSYD - ORD
1 stop25h 16mIberia
Deal found 2/19$826
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/211:51 pmORD - MEL
2 stops23h 49mAmerican Airlines
Wed 4/27:00 amMEL - ORD
2 stops24h 13mAmerican Airlines
Deal found 2/20$853
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/65:45 pmORD - SYD
1 stop34h 30mMultiple Airlines
Sun 4/139:10 amSYD - ORD
1 stop29h 49mMultiple Airlines
Deal found 2/20$858
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/184:33 pmORD - MEL
1 stop21h 27mQantas Airways
Mon 8/259:40 amMEL - ORD
1 stop29h 17mQantas Airways
Deal found 2/19$882
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:50 pmORD - SYD
2 stops23h 45mDelta
Sun 10/2610:05 amSYD - ORD
2 stops27h 55mDelta
Deal found 2/19$924
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:30 amMDW - SYD
2 stops30h 05mDelta
Tue 10/2810:05 amSYD - MDW
2 stops23h 58mDelta
Deal found 2/19$924
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:25 pmORD - SYD
1 stop34h 50mANA
Tue 12/912:25 pmSYD - ORD
1 stop42h 25mANA
Deal found 2/19$943
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2112:00 pmORD - AVV
2 stops37h 05mMultiple Airlines
Wed 10/156:00 amAVV - ORD
2 stops29h 40mMultiple Airlines
Deal found 2/19$950

Find flights from Illinois to Australia within your budget

Customize your flight search to find flights from Illinois to Australia 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 February 20, 2025.

Fly from

Illinois

Fly to

Australia

Route

Depart

Return

Price

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 2/23

8:50 am-5:00 am

1 stop28h 10m

Brisbane

Tue 2/25

9:40 am-3:23 pm

1 stop21h 43m

$805

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Fri 3/28

9:45 am-5:00 am

1 stop28h 15m

Brisbane

Sun 4/6

10:00 pm-5:14 am

1 stop22h 14m

$821

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 3/8

8:20 pm-7:25 am

1 stop42h 05m

Sydney Kingsford Smith

Sun 3/16

11:15 am-11:59 pm

1 stop28h 44m

$821

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 4/13

9:45 am-6:35 am

1 stop29h 50m

Sydney Kingsford Smith

Tue 6/3

5:35 pm-10:43 pm

1 stop20h 08m

$823

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 2/23

8:31 am-6:10 am

1 stop28h 39m

Sydney Kingsford Smith

Sun 3/9

11:50 am-8:06 pm

1 stop25h 16m

$826

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Fri 3/21

1:51 pm-5:40 am

2 stops23h 49m

Melbourne

Wed 4/2

7:00 am-3:13 pm

2 stops24h 13m

$853

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 4/6

5:45 pm-7:15 pm

1 stop34h 30m

Sydney Kingsford Smith

Sun 4/13

9:10 am-11:59 pm

1 stop29h 49m

$858

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 2/26

3:17 pm-7:35 am

1 stop23h 18m

Melbourne

Sun 3/9

4:20 pm-8:06 pm

1 stop20h 46m

$888

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/18

1:26 pm-7:45 am

2 stops26h 19m

Sydney Kingsford Smith

Tue 3/25

10:05 am-5:46 pm

2 stops23h 41m

$937

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 3/17

9:54 am-7:45 am

2 stops29h 51m

Sydney Kingsford Smith

Sun 9/21

9:25 am-9:47 pm

2 stops27h 22m

$937

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 Illinois to Australia

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

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

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

Currently, February is the cheapest month in which you can book a flight from Illinois to Australia (average of $1,051). Flying from Illinois to Australia in December is currently the most expensive (average of $1,643). 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 IL to AU?

Find hourly flight availability from Illinois to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Australia as you normally would.

Rainfall in Australia by month

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

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

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

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated February 20, 2025.
Read reviews from past customers who have flown Air Tahiti Nui, EVA Air and Korean Air from Illinois to Australia. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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

Crew

9.1

Food

7.8

Comfort

8.0

Overall

8.7

Boarding

8.7

Entertainment

7.2

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 Illinois to Australia. 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 Illinois to Australia one-way?

    $358 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on American Airlines and Qantas Airways, with prices starting from $390 and $401, respectively.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Illinois to Australia (average of $1,051). Flying from Illinois to Australia in December is currently the most expensive (average of $1,643). 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 Illinois to Australia

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Top 9 airlines flying from Illinois to Australia

Discover the top 9 airlines that operate flights from Illinois to Australia. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$618Average$1,261FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$781FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$1,131FlexibilityNo cancel feeOn-time71%
DeltaCheapest$851Average$983FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$958Average$1,390FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$994Average$1,649FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$1,138Average$1,400FlexibilityNo cancel feeOn-time72%
Air New ZealandCheapest$1,181Average$1,402FlexibilityNo cancel feeOn-time78%
Singapore AirlinesCheapest$1,421Average$1,706FlexibilityNo cancel feeOn-time81%
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