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$579+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Sun 12/2111:30 amMEL - STL
2 stops27h 52mUnited Airlines
Fri 1/28:05 amSTL - MEL
2 stops32h 55mUnited Airlines
Deal found 12/15$878
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/1711:30 amMEL - ORD
2 stops26h 37mUnited Airlines
Wed 12/2410:56 amORD - MEL
2 stops29h 34mUnited Airlines
Deal found 12/15$1,010
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Sat 12/202:55 pmADL - ORD
2 stops24h 35mUnited Airlines
Mon 2/2310:40 amORD - ADL
2 stops30h 20mUnited Airlines
Deal found 12/15$1,068
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Mon 12/2211:40 amBNE - ORD
1 stop29h 29mUnited Airlines
Thu 3/1911:00 amORD - BNE
1 stop28h 30mUnited Airlines
Deal found 12/17$1,071
This Delta deal was found by Cheapflights users on 12/17. 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.
Thu 12/2510:40 amSYD - MDW
2 stops23h 39mDelta
Wed 1/219:50 amMDW - SYD
2 stops29h 40mDelta
Deal found 12/17$1,148
This Delta deal was found by Cheapflights users on 12/17. 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.
Thu 12/252:15 pmSYD - ORD
2 stops26h 47mDelta
Wed 1/2112:30 pmORD - SYD
2 stops27h 00mDelta
Deal found 12/17$1,148
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/252:00 pmSYD - ORD
2 stops21h 55mUnited Airlines
Wed 1/211:00 pmORD - SYD
2 stops24h 20mUnited Airlines
Deal found 12/16$1,149
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Tue 12/1611:20 amSYD - ORD
2 stops22h 43mUnited Airlines
Mon 1/121:00 pmORD - SYD
2 stops24h 20mUnited Airlines
Deal found 12/14$1,151
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Thu 12/1811:50 amSYD - ORD
1 stop19h 50mUnited Airlines
Sat 1/310:10 pmORD - SYD
1 stop39h 10mUnited Airlines
Deal found 12/15$1,155
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Thu 12/1811:50 amSYD - ORD
1 stop23h 55mUnited Airlines
Thu 1/226:29 pmORD - SYD
1 stop21h 46mUnited Airlines
Deal found 12/17$1,196
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/1711:50 amSYD - ORD
1 stop19h 51mUnited Airlines
Thu 1/2211:05 amORD - SYD
1 stop29h 10mUnited Airlines
Deal found 12/15$1,197
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/2511:50 amSYD - ORD
1 stop19h 50mUnited Airlines
Fri 1/237:58 pmORD - SYD
1 stop44h 17mUnited Airlines
Deal found 12/16$1,199

Find flight deals from Australia to Illinois

Keep the following information in mind while searching for Australia to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$794
(United Airlines)

One-way from

$579
(American Airlines)

Popular in

December

Cheapest in

March

Average price

$1,463
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.
Search Deals
From Australia to Illinois
Search Deals
One-way flight from Australia to Illinois
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($258 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Sat 1/24

11:40 am-8:14 pm

2 stops24h 34m

Chicago O'Hare Intl

Sun 1/25

2:40 pm-7:30 am

1 stop24h 50m

$794

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 3/17

8:40 am-7:15 am

2 stops37h 35m

Chicago O'Hare Intl

Wed 4/1

4:45 pm-5:00 am

1 stop21h 15m

$852

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Fri 3/13

8:40 am-7:15 am

2 stops37h 35m

Chicago O'Hare Intl

Tue 3/17

1:40 pm-5:00 am

1 stop24h 20m

$853

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 2/1

1:00 pm-8:58 pm

2 stops24h 58m

Lambert-St Louis

Sun 2/8

9:57 am-10:00 am

2 stops31h 03m

$873

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 3/19

7:40 pm-6:05 pm

2 stops37h 25m

Chicago O'Hare Intl

Mon 3/23

9:28 am-5:00 am

1 stop28h 32m

$915

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 2/1

12:00 pm-11:59 pm

1 stop28h 59m

Lambert-St Louis

Sun 2/8

5:20 pm-10:05 am

2 stops23h 45m

$945

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 2/1

7:25 am-3:29 pm

3 stops49h 04m

Lambert-St Louis

Sun 2/8

4:05 pm-2:05 pm

3 stops53h 00m

$953

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Wed 1/14

10:10 am-5:34 pm

2 stops24h 24m

Chicago Midway

Tue 5/12

6:45 pm-7:50 am

2 stops46h 05m

$1,015

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Wed 1/14

10:10 am-6:32 pm

2 stops25h 22m

Chicago Midway

Sun 5/10

6:45 pm-7:50 am

2 stops46h 05m

$1,015

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Wed 1/14

10:10 am-6:32 pm

2 stops25h 22m

Chicago Midway

Mon 5/11

2:00 pm-7:50 am

2 stops26h 50m

$1,015

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $607). Flying from Australia to Illinois in December is currently the most expensive (average of $1,026). 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 December 18, 2025.

One of the essential ways to save on airfare from Australia to Illinois is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 10% on airfare.

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 December 18, 2025.
Peruse reviews from past customers who have flown with Japan Airlines, Qantas Airways, and United Airlines from Australia to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,662 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Entertainment

7.8

Comfort

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

HND - JFK

The plane was delayed due to maintenance after everybody boarded (1 hour), the inside of the plane was not air conditioned before takeoff, and the weather outside was hot. Upon arriving in JFK, there were further delays. The airline attendants were passive aggresive and not certainly were not polite.
Japan Airlines
8.3
Very good
1,662 reviews
Japan Airlines
8.3
Very good
1,662 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Entertainment

7.8

Comfort

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

HND - JFK

The plane was delayed due to maintenance after everybody boarded (1 hour), the inside of the plane was not air conditioned before takeoff, and the weather outside was hot. Upon arriving in JFK, there were further delays. The airline attendants were passive aggresive and not certainly were not polite.
Qantas Airways
7.5
Good
947 reviews
Japan Airlines
8.3
Very good
1,662 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Entertainment

7.8

Comfort

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

HND - JFK

The plane was delayed due to maintenance after everybody boarded (1 hour), the inside of the plane was not air conditioned before takeoff, and the weather outside was hot. Upon arriving in JFK, there were further delays. The airline attendants were passive aggresive and not certainly were not polite.
United Airlines
7.4
Good
9,092 reviews
Japan Airlines
8.3
Very good
1,662 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Entertainment

7.8

Comfort

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

HND - JFK

The plane was delayed due to maintenance after everybody boarded (1 hour), the inside of the plane was not air conditioned before takeoff, and the weather outside was hot. Upon arriving in JFK, there were further delays. The airline attendants were passive aggresive and not certainly were not polite.
Air Canada
7.1
Good
10,534 reviews
Japan Airlines
8.3
Very good
1,662 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Entertainment

7.8

Comfort

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

HND - JFK

The plane was delayed due to maintenance after everybody boarded (1 hour), the inside of the plane was not air conditioned before takeoff, and the weather outside was hot. Upon arriving in JFK, there were further delays. The airline attendants were passive aggresive and not certainly were not polite.

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.

  • How long is the flight from Australia to Illinois?

    A quick flight from Australia to Illinois can take about 24h 24m. United Airlines provides one of the quickest options available for as low as $1,015. Australia and Illinois are separated by a distance of 9665 mi. This flight may include one or multiple stops.

  • 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 $372 on Qantas Airways. Other airlines that offer cheap prices include American Airlines from $465 and Air Canada from $530 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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $607). Flying from Australia to Illinois in December is currently the most expensive (average of $1,026). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$900FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$862Average$1,101FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$965Average$973FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,080Average$1,250FlexibilityNo cancel feeOn-time69%

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