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Cheap flights from Australia to Illinois from $839

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
28 Jul — 4 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 28 June 2026.

Sun 9/809:45
MEL
-
ORD
1 stop23h 02m
Qantas Airways
Sat 22/811:49
ORD
-
MEL
1 stop27h 56m
Qantas Airways
Deal found 25/6$1,322
Mon 3/813:35
MEL
-
ORD
1 stop21h 09m
Qantas Airways
Wed 12/817:16
ORD
-
MEL
1 stop22h 29m
Qantas Airways
Deal found 25/6$1,325
Sat 8/809:45
MEL
-
ORD
1 stop22h 44m
Qantas Airways
Sat 15/815:22
ORD
-
MEL
1 stop24h 23m
Qantas Airways
Deal found 24/6$1,332
Thu 6/806:15
SYD
-
MDW
3 stops42h 36m
Multiple Airlines
Tue 11/811:06
MDW
-
SYD
3 stops33h 44m
Multiple Airlines
Deal found 24/6$1,335
Wed 12/806:05
SYD
-
ORD
2 stops39h 12m
Multiple Airlines
Wed 19/809:20
ORD
-
SYD
3 stops35h 30m
Multiple Airlines
Deal found 23/6$1,337
Mon 27/709:45
MEL
-
ORD
2 stops28h 45m
American Airlines
Mon 10/809:00
ORD
-
MEL
1 stop30h 45m
American Airlines
Deal found 26/6$1,342
Wed 5/813:35
MEL
-
ORD
1 stop21h 07m
Qantas Airways
Wed 12/815:22
ORD
-
MEL
1 stop24h 23m
Qantas Airways
Deal found 23/6$1,345
Fri 17/709:30
MEL
-
ORD
1 stop20h 05m
United Airlines
Fri 7/810:54
ORD
-
MEL
2 stops29h 36m
United Airlines
Deal found 25/6$1,355
Mon 3/810:55
MEL
-
ORD
2 stops26h 54m
United Airlines
Wed 12/816:45
ORD
-
MEL
1 stop23h 45m
United Airlines
Deal found 25/6$1,357
Mon 27/710:55
MEL
-
ORD
2 stops28h 50m
United Airlines
Mon 10/816:12
ORD
-
MEL
2 stops24h 18m
United Airlines
Deal found 26/6$1,358
Sat 1/810:55
MEL
-
STL
2 stops45h 47m
United Airlines
Mon 31/815:35
STL
-
MEL
2 stops24h 55m
United Airlines
Deal found 24/6$1,364
Sun 9/810:55
MEL
-
ORD
1 stop25h 43m
Lufthansa
Sat 22/814:35
ORD
-
MEL
1 stop26h 40m
Lufthansa
Deal found 26/6$1,376

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 28 June 2026.

Round-trip from

$1,322

One-way from

$839

Popular in

May

Cheapest in

August

Average price

$2,008
Qantas Airways
  • Qantas Airways
  • 9/8-22/8
  • 2 total stops
  • 50h 58m total
  • Australia to Illinois
Search Deals
12/8
  • 12/8
  • 3 total stops
  • 50h 12m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($264 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 June 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 28 June 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
Fastest return journey

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 5/8

13:35-19:42

1 stop21h 07m

Chicago O'Hare Intl

Wed 12/8

15:22-06:45

1 stop24h 23m

$1,345

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sun 30/8

10:55-20:26

1 stop24h 31m

Chicago O'Hare Intl

Fri 11/9

16:40-07:30

1 stop23h 50m

$1,355

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 17/7

09:30-17:04

1 stop22h 34m

Chicago O'Hare Intl

Fri 7/8

14:33-07:30

2 stops25h 57m

$1,355

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 3/8

10:55-04:51

2 stops32h 56m

Chicago O'Hare Intl

Thu 13/8

18:20-08:15

1 stop22h 55m

$1,355

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 27/7

10:55-00:45

2 stops28h 50m

Chicago O'Hare Intl

Mon 10/8

16:12-07:30

2 stops24h 18m

$1,358

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 3/8

10:55-21:38

1 stop25h 43m

Chicago O'Hare Intl

Wed 12/8

12:47-07:30

2 stops27h 43m

$1,363

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 1/8

10:55-17:42

2 stops45h 47m

Lambert-St Louis

Mon 31/8

15:35-07:30

2 stops24h 55m

$1,364

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sat 8/8

13:30-23:00

2 stops24h 30m

Chicago O'Hare Intl

Sat 15/8

17:16-06:45

1 stop22h 29m

$1,392

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

$1,403

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

10:20-16:33

2 stops21h 13m

Lambert-St Louis

Mon 31/8

15:35-07:00

2 stops24h 25m

$1,447

Flights are sorted by cheapest return flights first.

Deals found on 27/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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 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, September is the cheapest month in which you can book a flight from Australia to Illinois (average of $178). Flying from Australia to Illinois in January is currently the most expensive (average of $1,221). 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 28 June 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
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air New Zealand
8.0
Very Good
646 reviews
Air New Zealand
8.0
Very Good
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Qantas Airways
7.5
Good
1,053 reviews
Air New Zealand
8.0
Very Good
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
United Airlines
7.4
Good
9,899 reviews
Air New Zealand
8.0
Very Good
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
American Airlines
7.1
Good
11,776 reviews
Air New Zealand
8.0
Very Good
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air Canada
7.1
Good
11,269 reviews
Air New Zealand
8.0
Very Good
646 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane

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 Delta fly from Australia to Illinois in about 21h 07m. The time it takes to get you to your destination can typically vary by up to 6h 08m. 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 $523. Air New Zealand flights start at $768 while deals on United Airlines start at $1,157 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, September is the cheapest month in which you can book a flight from Australia to Illinois (average of $178). Flying from Australia to Illinois in January is currently the most expensive (average of $1,221). 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 28 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$605Average$1,720FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,051Average$1,989FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,098Average$1,728FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,113Average$1,585FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,273Average$2,023FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Japan AirlinesCheapest$1,414Average$2,701FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
ANACheapest$1,549Average$1,986FlexibilityNo cancel feeOn-time80%
Search ANA flights
Cathay PacificCheapest$1,724Average$2,019FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Virgin AustraliaCheapest$2,201Average$2,230FlexibilityNo 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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