Find flights
When to book
Airlines
FAQs

Cheap flights from Australia to Illinois from $704

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
15 May — 22 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 15 April 2026.

Fri 1/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Sat 16/506:55
ORD
-
SYD
3 stops48h 15m
Multiple Airlines
Deal found 11/4$1,500
Sat 9/513:15
SYD
-
ORD
2 stops31h 44m
Multiple Airlines
Sun 31/507:15
ORD
-
SYD
2 stops37h 35m
Multiple Airlines
Deal found 14/4$1,536
Fri 29/506:00
MEL
-
STL
3 stops45h 06m
Air Canada
Tue 2/614:15
STL
-
MEL
3 stops30h 20m
Air Canada
Deal found 13/4$1,543
Wed 27/513:15
SYD
-
ORD
3 stops46h 17m
Multiple Airlines
Wed 3/606:55
ORD
-
SYD
3 stops37h 55m
Multiple Airlines
Deal found 11/4$1,548
Fri 1/513:15
SYD
-
MDW
3 stops41h 58m
Multiple Airlines
Sat 16/506:00
MDW
-
SYD
3 stops49h 10m
Multiple Airlines
Deal found 12/4$1,580
Fri 15/506:00
MEL
-
STL
3 stops29h 09m
Air Canada
Fri 22/507:05
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 12/4$1,587
Tue 12/520:30
MEL
-
STL
3 stops54h 36m
Air Canada
Tue 19/507:05
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 14/4$1,593
Tue 8/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Fri 11/917:45
ORD
-
SYD
1 stop34h 25m
ANA
Deal found 14/4$1,607
Tue 12/509:45
MEL
-
STL
1 stop29h 14m
American Airlines
Tue 19/512:27
STL
-
MEL
2 stops27h 18m
American Airlines
Deal found 14/4$1,608
Sun 10/509:45
MEL
-
STL
1 stop29h 14m
American Airlines
Sun 17/506:21
STL
-
MEL
1 stop33h 24m
American Airlines
Deal found 12/4$1,610
Thu 30/713:15
SYD
-
ORD
3 stops46h 38m
Multiple Airlines
Sat 1/809:33
ORD
-
SYD
3 stops35h 17m
Multiple Airlines
Deal found 11/4$1,612
Fri 15/510:55
MEL
-
STL
2 stops24h 48m
United Airlines
Fri 22/513:13
STL
-
MEL
2 stops27h 17m
United Airlines
Deal found 12/4$1,625

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 April 2026.

Round-trip from

$1,500

One-way from

$704

Popular in

April

Cheapest in

August

Average price

$2,238
1/5-16/5
  • 1/5-16/5
  • 5 total stops
  • 79h 50m total
  • Australia to Illinois
Search Deals
4/9
  • 4/9
  • 3 total stops
  • 43h 09m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($202 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($70 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 15 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

Fri 29/5

06:00-12:06

3 stops45h 06m

Lambert-St Louis

Tue 2/6

08:40-11:05

3 stops35h 25m

$1,543

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 15/5

10:55-20:43

2 stops24h 48m

Lambert-St Louis

Fri 22/5

19:23-08:15

1 stop21h 52m

$1,625

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 10/5

10:00-19:03

2 stops24h 03m

Lambert-St Louis

Sun 17/5

15:11-07:50

2 stops49h 39m

$1,636

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 5/5

17:50-11:09

2 stops32h 19m

Chicago Midway

Wed 20/5

06:00-07:30

2 stops34h 30m

$1,711

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 3/6

13:05-07:20

2 stops51h 15m

$1,711

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Fri 12/6

16:48-07:20

2 stops23h 32m

$1,766

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,767

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,778

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 24/7

13:15-06:19

2 stops32h 04m

Chicago O'Hare Intl

Tue 28/7

06:55-22:10

3 stops48h 15m

$1,825

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Mon 11/5

17:59-07:20

2 stops46h 21m

$1,850

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $947). Flying from Australia to Illinois in January is currently the most expensive (average of $1,399). 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 15 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
627 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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
1,019 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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
9,589 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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
11,580 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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
10,926 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Entertainment

7.4

Food

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 Air Canada, United Airlines, and Delta fly from Australia to Illinois in about 24h 03m. The time it takes to get you to your destination can typically vary by up to 21h 03m. There are 15255 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 $179. Qantas Airways flights start at $651 while deals on Air New Zealand start at $745 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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $947). Flying from Australia to Illinois in January is currently the most expensive (average of $1,399). 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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$949Average$1,818FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,065Average$1,626FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,079Average$1,537FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,096Average$1,487FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,254Average$2,064FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,367Average$1,889FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,477Average$1,594FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,818Average$2,243FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Virgin AustraliaCheapest$2,135Average$2,162FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.