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Cheap flights from Australia to Illinois from $597

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
10 May — 17 May1
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 10 April 2026.

Wed 29/413:15
SYD
-
ORD
3 stops31h 53m
Multiple Airlines
Tue 5/512:40
ORD
-
SYD
3 stops32h 10m
Multiple Airlines
Deal found 10/4$1,518
Tue 28/413:15
SYD
-
ORD
2 stops25h 12m
Multiple Airlines
Mon 4/507:15
ORD
-
SYD
2 stops37h 35m
Multiple Airlines
Deal found 10/4$1,538
Fri 8/513:30
MEL
-
ORD
2 stops31h 29m
Multiple Airlines
Fri 15/507:15
ORD
-
MEL
2 stops37h 50m
Multiple Airlines
Deal found 9/4$1,551
Wed 6/520:30
MEL
-
STL
3 stops38h 39m
Air Canada
Wed 13/514:15
STL
-
MEL
3 stops30h 20m
Air Canada
Deal found 8/4$1,573
Sun 24/513:15
SYD
-
ORD
2 stops31h 44m
Multiple Airlines
Sun 31/507:15
ORD
-
SYD
2 stops37h 35m
Multiple Airlines
Deal found 9/4$1,580
Wed 6/509:45
MEL
-
STL
1 stop29h 12m
American Airlines
Wed 13/512:27
STL
-
MEL
1 stop25h 33m
American Airlines
Deal found 8/4$1,596
Sat 23/513:35
MEL
-
STL
1 stop19h 55m
Qantas Airways
Sat 30/517:11
STL
-
MEL
1 stop20h 49m
Qantas Airways
Deal found 8/4$1,603
Mon 27/413:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Tue 12/512:40
ORD
-
SYD
3 stops42h 30m
Multiple Airlines
Deal found 7/4$1,607
Sat 23/509:45
MEL
-
STL
2 stops22h 49m
American Airlines
Sat 30/513:45
STL
-
MEL
2 stops26h 00m
American Airlines
Deal found 8/4$1,610
Wed 6/510:55
MEL
-
STL
2 stops26h 35m
United Airlines
Wed 13/516:44
STL
-
MEL
2 stops23h 46m
United Airlines
Deal found 8/4$1,612
Thu 21/513:30
MEL
-
ORD
3 stops46h 02m
Multiple Airlines
Thu 28/506:55
ORD
-
MEL
3 stops38h 05m
Multiple Airlines
Deal found 6/4$1,620
Wed 6/510:00
MEL
-
STL
2 stops28h 35m
Delta
Wed 13/510:19
STL
-
MEL
2 stops30h 31m
Delta
Deal found 8/4$1,622

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 10 April 2026.

Round-trip from

$1,518

One-way from

$597

Popular in

April

Cheapest in

August

Average price

$2,257
29/4-5/5
  • 29/4-5/5
  • 6 total stops
  • 64h 03m total
  • Australia to Illinois
Search Deals
25/4
  • 25/4
  • 2 total stops
  • 34h 25m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($188 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($72 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 10 April 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

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 6/5

10:55-22:30

2 stops26h 35m

Lambert-St Louis

Wed 13/5

16:44-07:30

2 stops23h 46m

$1,612

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 29/5

06:00-12:06

3 stops45h 06m

Lambert-St Louis

Tue 2/6

14:15-11:05

3 stops29h 50m

$1,656

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 23/5

17:50-06:34

1 stop27h 44m

Chicago O'Hare Intl

Sat 30/5

20:46-07:30

1 stop43h 44m

$1,895

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/5

09:20-16:57

2 stops22h 37m

Lambert-St Louis

Mon 11/5

07:05-07:20

2 stops33h 15m

$1,986

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 19/5

09:30-16:39

2 stops22h 09m

Lambert-St Louis

Tue 16/6

13:38-07:00

2 stops26h 22m

$2,052

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 19/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Tue 9/6

19:23-06:55

1 stop20h 32m

$2,058

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 11/6

06:35-07:05

1 stop33h 30m

$2,079

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 8/5

10:00-20:14

2 stops25h 14m

Chicago O'Hare Intl

Mon 8/6

07:35-07:50

1 stop33h 15m

$2,081

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 7/5

20:45-13:13

3 stops31h 28m

Chicago O'Hare Intl

Thu 28/5

14:10-18:50

2 stops37h 40m

$2,081

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Fri 8/5

10:00-18:33

2 stops23h 33m

Chicago Midway

Thu 21/5

18:36-07:50

2 stops46h 14m

$2,085

Flights are sorted by cheapest return flights first.

Deals found on 9/4

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, July is the cheapest month in which you can book a flight from Australia to Illinois (average of $957). Flying from Australia to Illinois in January is currently the most expensive (average of $1,410). 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.

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 10 April 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
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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
626 reviews
Air New Zealand
8.0
Very Good
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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
1,018 reviews
Air New Zealand
8.0
Very Good
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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
9,562 reviews
Air New Zealand
8.0
Very Good
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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
11,563 reviews
Air New Zealand
8.0
Very Good
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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
10,915 reviews
Air New Zealand
8.0
Very Good
626 reviews
Check prices

Food

7.4

Crew

8.5

Comfort

8.0

Overall

8.0

Boarding

8.2

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, Air Canada, and Delta fly from Australia to Illinois in about 25h 14m. The time it takes to get you to your destination can typically vary by up to 19h 52m. 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 United Airlines, which is currently one of the cheapest options available, starting at $180. Qantas Airways flights start at $656 while deals on Air Canada start at $748 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, July is the cheapest month in which you can book a flight from Australia to Illinois (average of $957). Flying from Australia to Illinois in January is currently the most expensive (average of $1,410). 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 10 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$957Average$1,893FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,074Average$1,619FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,088Average$1,550FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,105Average$1,499FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,265Average$2,081FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,379Average$1,905FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,489Average$1,607FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,833Average$2,262FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Virgin AustraliaCheapest$2,153Average$2,180FlexibilityNo 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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