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Cheap flights from Australia to Illinois from $815

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
15 Jul — 22 Jul1
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 15 June 2026.

Mon 27/709:45
MEL
-
ORD
1 stop22h 05m
American Airlines
Sun 9/822:35
ORD
-
MEL
1 stop41h 10m
American Airlines
Deal found 12/6$1,327
Sun 19/710:55
MEL
-
ORD
1 stop22h 40m
United Airlines
Wed 29/715:57
ORD
-
MEL
2 stops24h 33m
United Airlines
Deal found 10/6$1,343
Wed 15/709:30
MEL
-
ORD
1 stop20h 05m
United Airlines
Wed 29/714:30
ORD
-
MEL
2 stops26h 00m
United Airlines
Deal found 13/6$1,348
Fri 24/710:00
MEL
-
MDW
2 stops27h 15m
Delta
Sun 2/818:58
MDW
-
MEL
2 stops45h 52m
Delta
Deal found 11/6$1,353
Fri 24/710:00
MEL
-
ORD
2 stops26h 29m
Delta
Sun 2/819:17
ORD
-
MEL
2 stops45h 33m
Delta
Deal found 12/6$1,353
Wed 15/710:00
MEL
-
ORD
2 stops26h 29m
Delta
Wed 29/712:27
ORD
-
MEL
2 stops28h 23m
Delta
Deal found 15/6$1,360
Fri 24/709:30
MEL
-
ORD
1 stop28h 46m
Air New Zealand
Sun 2/821:30
ORD
-
MEL
1 stop43h 00m
Air New Zealand
Deal found 15/6$1,367
Thu 13/810:55
MEL
-
ORD
2 stops27h 10m
Lufthansa
Sun 23/816:20
ORD
-
MEL
1 stop24h 55m
Lufthansa
Deal found 13/6$1,368
Wed 29/710:55
MEL
-
ORD
1 stop25h 08m
Lufthansa
Wed 5/816:30
ORD
-
MEL
1 stop24h 45m
Lufthansa
Deal found 14/6$1,370
Fri 28/809:10
SYD
-
STL
2 stops47h 27m
American Airlines
Mon 7/905:42
STL
-
SYD
1 stop34h 13m
American Airlines
Deal found 14/6$1,389
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
American Airlines
Tue 8/906:36
STL
-
SYD
2 stops33h 29m
American Airlines
Deal found 12/6$1,412
Wed 26/809:10
SYD
-
STL
2 stops22h 31m
American Airlines
Wed 2/906:36
STL
-
SYD
2 stops33h 29m
American Airlines
Deal found 14/6$1,413

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 15 June 2026.

Round-trip from

$1,327

One-way from

$815

Popular in

May

Cheapest in

August

Average price

$1,870
American Airlines
  • American Airlines
  • 27/7-9/8
  • 2 total stops
  • 63h 15m total
  • Australia to Illinois
Search Deals
25/7
  • 25/7
  • 3 total stops
  • 39h 17m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($189 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($23 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 15 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

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 15/7

09:30-14:35

1 stop20h 05m

Chicago O'Hare Intl

Wed 29/7

13:00-07:30

1 stop27h 30m

$1,348

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Fri 24/7

10:00-22:15

2 stops27h 15m

Chicago Midway

Sun 2/8

18:58-07:50

2 stops45h 52m

$1,353

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 24/7

10:00-17:35

1 stop22h 35m

Chicago O'Hare Intl

Sun 2/8

19:40-07:50

2 stops45h 10m

$1,353

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 15/7

10:00-23:18

1 stop28h 18m

Chicago O'Hare Intl

Wed 29/7

07:29-07:50

1 stop33h 21m

$1,353

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:20-18:42

2 stops48h 22m

Lambert-St Louis

Mon 3/8

12:10-07:20

2 stops52h 10m

$1,508

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Mon 10/8

08:36-07:05

2 stops31h 29m

$1,548

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 10/10

10:15-21:34

2 stops27h 19m

Chicago O'Hare Intl

Sat 31/10

12:15-07:30

2 stops27h 15m

$1,587

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

09:10-19:26

2 stops25h 16m

Lambert-St Louis

Mon 20/7

09:08-07:05

2 stops30h 57m

$1,614

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

09:20-20:22

2 stops26h 02m

Lambert-St Louis

Tue 11/8

08:55-07:20

2 stops31h 25m

$1,678
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 3/8

19:23-06:55

1 stop20h 32m

$1,697

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 $174). Flying from Australia to Illinois in June is currently the most expensive (average of $3,536). 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 44 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 15 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
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air New Zealand
8.0
Very Good
645 reviews
Air New Zealand
8.0
Very Good
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Qantas Airways
7.5
Good
1,047 reviews
Air New Zealand
8.0
Very Good
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
United Airlines
7.4
Good
9,842 reviews
Air New Zealand
8.0
Very Good
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
American Airlines
7.1
Good
11,667 reviews
Air New Zealand
8.0
Very Good
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air Canada
7.1
Good
11,197 reviews
Air New Zealand
8.0
Very Good
645 reviews
Check prices

Comfort

7.9

Crew

8.5

Food

7.4

Boarding

8.2

Overall

8.0

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding

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 United Airlines, Delta, and Air Canada fly from Australia to Illinois in about 20h 05m. The time it takes to get you to your destination can typically vary by up to 28h 17m. 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 $510. Air New Zealand flights start at $749 while deals on American Airlines start at $987 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 $174). Flying from Australia to Illinois in June is currently the most expensive (average of $3,536). 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 15 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$590Average$1,677FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,025Average$1,939FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,071Average$1,615FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,085Average$1,546FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,241Average$1,921FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Japan AirlinesCheapest$1,379Average$2,634FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
ANACheapest$1,511Average$1,748FlexibilityNo cancel feeOn-time80%
Search ANA flights
Cathay PacificCheapest$1,681Average$1,969FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Virgin AustraliaCheapest$2,146Average$2,174FlexibilityNo 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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