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$479+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$802
(Expedia)

One-way from

$479
(flugladen.de)

Popular in

December

Cheapest in

August

Average price

$1,071
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. 15% potential increase in price ($181 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Expedia deal was found by Cheapflights users on 7/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:40 pmORD - SYD
1 stop24h 40mAir Canada
Tue 8/199:20 amSYD - ORD
1 stop25h 44mAir Canada
Deal found 7/29$802
This Air Canada deal was found by Cheapflights users on 7/30. 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.
Wed 10/223:40 pmORD - MEL
2 stops28h 55mAir Canada
Wed 11/127:10 amMEL - ORD
2 stops26h 34mAir Canada
Deal found 7/30$871
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/14:05 pmSTL - SYD
2 stops45h 50mAir Canada
Sun 2/111:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 7/29$899
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:20 amORD - SYD
2 stops38h 25mMultiple Airlines
Sun 11/22:00 pmSYD - ORD
2 stops25h 59mMultiple Airlines
Deal found 7/30$964
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/294:55 pmSTL - SYD
2 stops23h 40mMultiple Airlines
Sat 11/1511:20 amSYD - STL
2 stops45h 09mMultiple Airlines
Deal found 7/29$970
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:41 pmORD - BNE
1 stop20h 24mAir Canada
Tue 9/2310:20 amBNE - ORD
1 stop19h 40mAir Canada
Deal found 7/29$982
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:20 amORD - MEL
2 stops39h 05mMultiple Airlines
Sun 11/92:15 pmMEL - ORD
2 stops25h 44mMultiple Airlines
Deal found 7/30$1,028
This Air Canada deal was found by Cheapflights users on 7/28. 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.
Mon 9/84:05 pmSTL - MEL
3 stops52h 00mAir Canada
Mon 9/158:30 pmMEL - STL
3 stops38h 08mAir Canada
Deal found 7/28$1,039
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:40 pmORD - PER
2 stops47h 40mMultiple Airlines
Tue 11/115:35 amPER - ORD
2 stops45h 25mMultiple Airlines
Deal found 7/28$1,048
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:00 amSTL - SYD
2 stops33h 50mQantas Airways
Sat 2/282:20 pmSYD - STL
1 stop20h 59mQantas Airways
Deal found 7/28$1,070
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/198:51 amORD - ADL
2 stops36h 29mAir Canada
Tue 8/266:50 pmADL - ORD
2 stops39h 44mAir Canada
Deal found 7/29$1,076
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/178:48 amORD - ADL
2 stops36h 32mMultiple Airlines
Mon 8/257:30 pmADL - ORD
2 stops35h 42mMultiple Airlines
Deal found 7/29$1,101

Cheapflights Fare Finder

 
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 July 30, 2025.
Use the filters below to find and compare flights from Illinois to Australia that are best for you.

Fly from

Illinois

Fly to

Australia

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 8/4

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

Tue 8/19

9:20 am-8:04 pm

1 stop25h 44m

$802

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 10/22

3:40 pm-12:35 pm

2 stops28h 55m

Melbourne

Wed 11/12

7:10 am-4:44 pm

2 stops26h 34m

$871

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 12/1

4:05 pm-6:55 am

2 stops45h 50m

Sydney Kingsford Smith

Sun 2/1

11:20 am-3:29 pm

2 stops45h 09m

$899

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/20

6:20 am-12:45 pm

2 stops38h 25m

Sydney Kingsford Smith

Sun 11/2

2:00 pm-11:59 pm

2 stops25h 59m

$964

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 10/29

4:55 pm-8:35 am

2 stops23h 40m

Sydney Kingsford Smith

Sat 11/15

11:20 am-3:29 pm

2 stops45h 09m

$970

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 9/9

10:40 am-7:05 am

2 stops29h 25m

Brisbane

Tue 9/23

10:20 am-3:00 pm

1 stop19h 40m

$982

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 10/27

6:20 am-1:25 pm

2 stops39h 05m

Melbourne

Sun 11/9

2:15 pm-10:59 pm

2 stops25h 44m

$1,028

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 9/8

4:05 pm-11:05 am

3 stops52h 00m

Melbourne

Mon 9/15

8:30 pm-7:38 pm

3 stops38h 08m

$1,039

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 11/2

2:40 pm-4:20 am

2 stops47h 40m

Perth

Tue 11/11

5:35 am-1:00 pm

2 stops45h 25m

$1,048

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 11/17

7:00 am-9:50 am

2 stops33h 50m

Sydney Kingsford Smith

Sat 2/28

2:20 pm-6:19 pm

1 stop20h 59m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Australia

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 $1,028). Flying from Illinois to Australia in December is currently the most expensive (average of $1,619). 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 July 30, 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.

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 July 30, 2025.
Peruse reviews from past customers who have flown with ANA, Korean Air, and Japan Airlines from Illinois to Australia to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
ANA
8.4
Very good
922 reviews
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
Korean Air
8.4
Very good
1,121 reviews
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
Japan Airlines
8.3
Very good
1,536 reviews
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
Fiji Airways
8.0
Very good
202 reviews
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
Delta
8.0
Very good
7,980 reviews
ANA
8.4
Very good
922 reviews

Boarding

8.5

Crew

8.7

Food

7.7

Overall

8.4

Comfort

8.2

Entertainment

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

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?

    $612 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Fiji Airways and Qantas Airways, with prices starting from $645 and $740, 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 $1,028). Flying from Illinois to Australia in December is currently the most expensive (average of $1,619). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$647Average$1,189FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,177FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$1,294FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$772Average$1,432FlexibilityNo cancel feeOn-time74%
DeltaCheapest$851Average$978FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$876Average$1,388FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$953Average$1,302FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,275Average$1,506FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,470Average$1,564FlexibilityNo cancel feeOn-time72%

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