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Cheap flights from Australia to Illinois from $870

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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
11 Aug — 18 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

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 12 July 2026.

Wed 12/806:05
SYD
-
ORD
2 stops39h 12m
Multiple Airlines
Wed 19/809:20
ORD
-
SYD
3 stops35h 30m
Multiple Airlines
Deal found 10/7$1,290
Fri 17/709:45
MEL
-
ORD
1 stop28h 15m
Qantas Airways
Wed 12/821:06
ORD
-
MEL
1 stop42h 39m
Qantas Airways
Deal found 10/7$1,305
Mon 3/809:45
MEL
-
ORD
1 stop25h 23m
Qantas Airways
Sat 22/811:49
ORD
-
MEL
1 stop27h 56m
Qantas Airways
Deal found 9/7$1,313
Sat 15/809:45
MEL
-
ORD
1 stop28h 15m
Qantas Airways
Fri 11/918:50
ORD
-
MEL
1 stop43h 10m
Qantas Airways
Deal found 9/7$1,314
Fri 21/809:45
MEL
-
ORD
1 stop22h 06m
Qantas Airways
Fri 28/821:06
ORD
-
MEL
1 stop42h 39m
Qantas Airways
Deal found 7/7$1,324
Sat 15/809:45
MEL
-
ORD
1 stop22h 03m
Multiple Airlines
Fri 11/913:50
ORD
-
MEL
1 stop25h 55m
Multiple Airlines
Deal found 9/7$1,334
Tue 4/809:45
MEL
-
ORD
1 stop21h 14m
American Airlines
Tue 11/811:49
ORD
-
MEL
1 stop27h 56m
American Airlines
Deal found 9/7$1,336
Fri 17/709:45
MEL
-
ORD
2 stops28h 45m
American Airlines
Thu 30/715:15
ORD
-
MEL
2 stops24h 30m
American Airlines
Deal found 11/7$1,337
Fri 24/709:45
MEL
-
ORD
1 stop23h 27m
American Airlines
Sun 2/812:29
ORD
-
MEL
1 stop27h 16m
American Airlines
Deal found 12/7$1,349
Thu 6/810:55
MEL
-
STL
2 stops27h 34m
Lufthansa
Thu 13/812:59
STL
-
MEL
2 stops28h 16m
Lufthansa
Deal found 8/7$1,390
Mon 3/813:15
SYD
-
MDW
3 stops36h 52m
Multiple Airlines
Mon 10/806:05
MDW
-
SYD
3 stops49h 20m
Multiple Airlines
Deal found 8/7$1,395
Mon 3/813:15
SYD
-
ORD
2 stops32h 02m
Multiple Airlines
Mon 10/810:16
ORD
-
SYD
3 stops45h 09m
Multiple Airlines
Deal found 7/7$1,419

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 12 July 2026.

Round-trip from

$1,290

One-way from

$858

Popular in

May

Cheapest in

October

Average price

$1,941
12/8-19/8
  • 12/8-19/8
  • 5 total stops
  • 74h 42m total
  • Australia to Illinois
Search Deals
American Airlines
  • American Airlines
  • 18/7
  • 2 total stops
  • 24h 22m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($203 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 12 July 2026.
Use the filters below to find and compare flights from Australia to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sat 15/8

09:45-17:29

1 stop22h 44m

Chicago O'Hare Intl

Fri 11/9

15:20-06:45

1 stop24h 25m

$1,334

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sun 30/8

09:45-16:51

1 stop22h 06m

Chicago O'Hare Intl

Sat 19/9

15:50-05:00

1 stop22h 10m

$1,337

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 26/8

09:30-17:05

2 stops22h 35m

Chicago O'Hare Intl

Wed 2/9

16:45-08:15

2 stops24h 30m

$1,369

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 24/7

09:30-23:16

1 stop28h 46m

Chicago O'Hare Intl

Sun 2/8

21:30-07:30

1 stop43h 00m

$1,406

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 3/8

13:15-06:17

2 stops32h 02m

Chicago O'Hare Intl

Mon 10/8

10:16-22:25

3 stops45h 09m

$1,419

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

09:10-10:20

2 stops40h 10m

Lambert-St Louis

Sun 13/9

10:14-06:55

1 stop29h 41m

$1,448

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 9/9

13:35-18:04

1 stop19h 29m

Lambert-St Louis

Tue 22/9

06:30-06:45

1 stop33h 15m

$1,564

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

10:20-17:59

1 stop22h 39m

Lambert-St Louis

Sun 13/9

08:42-06:55

1 stop31h 13m

$1,571

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 22/8

09:10-18:05

2 stops23h 55m

Lambert-St Louis

Sat 29/8

13:25-07:05

2 stops26h 40m

$1,576
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 9/9

12:00-18:04

1 stop21h 04m

Lambert-St Louis

Sat 3/10

17:00-06:55

1 stop21h 55m

$1,590

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 return 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, October is the cheapest month in which you can book a flight from Australia to Illinois (average of $187). Flying from Australia to Illinois in January is currently the most expensive (average of $1,211). 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.

How far ahead should I book a flight from Australia to Illinois?

The price you pay for your flight from Australia to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 12 July 2026.
Read reviews from past customers who have flown with Air New Zealand,Qantas Airways, andUnited Airlines from Australia to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air New Zealand
8.0
Very Good
653 reviews
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Qantas Airways
7.5
Good
1,061 reviews
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
United Airlines
7.4
Good
9,980 reviews
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
American Airlines
7.1
Good
11,812 reviews
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air Canada
7.1
Good
11,332 reviews
Air New Zealand
8.0
Very Good
653 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

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?

    Airlines like Qantas Airways, United Airlines, and American Airlines fly from Australia to Illinois in about 22h 06m. The time it takes to get you to your destination can typically vary by up to 18h 04m. There are 15546 km between Australia and Illinois. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Australia to Illinois one-way?

    To fly one-way, consider booking your trip with Qantas Airways, which is currently one of the cheapest options available, starting at $518. Air New Zealand flights start at $762 while deals on United Airlines start at $1,148 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 holiday 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, October is the cheapest month in which you can book a flight from Australia to Illinois (average of $187). Flying from Australia to Illinois in January is currently the most expensive (average of $1,211). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from Australia to Illinois

Discover the top 9 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 647,157 searches. Data last updated 12 July 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$600Average$1,626FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,043Average$2,113FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,089Average$1,714FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,104Average$1,581FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,262Average$1,919FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Japan AirlinesCheapest$1,402Average$2,863FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
ANACheapest$1,537Average$2,009FlexibilityNo cancel feeOn-time80%
Search ANA flights
Cathay PacificCheapest$1,710Average$2,003FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Virgin AustraliaCheapest$2,183Average$2,211FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Australia to Illinois?

Cheapflights helps you search for flights from Australia to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Australia to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Australia.

Can Cheapflights find flights from Australia to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Australia to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Australia to Illinois become cheaper?

Yes, Cheapflights offers price alerts on Australia to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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