Find flights
When to book
Airlines
FAQs

Cheap flights from Australia to Illinois from $889

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 20/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
30 May — 6 Jun1
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 30 April 2026.

Wed 20/509:20
SYD
-
STL
2 stops41h 46m
Multiple Airlines
Thu 28/516:48
STL
-
SYD
2 stops23h 32m
Multiple Airlines
Deal found 25/4$1,434
Wed 10/609:20
SYD
-
STL
2 stops53h 37m
Air Canada
Wed 17/608:40
STL
-
SYD
2 stops31h 40m
Air Canada
Deal found 27/4$1,497
Mon 10/809:20
SYD
-
STL
2 stops50h 19m
Air Canada
Thu 3/905:10
STL
-
SYD
2 stops35h 10m
Air Canada
Deal found 28/4$1,522
Wed 20/509:20
SYD
-
STL
2 stops26h 05m
Air Canada
Thu 28/513:05
STL
-
SYD
3 stops51h 15m
Air Canada
Deal found 25/4$1,543
Wed 27/509:45
MEL
-
STL
1 stop29h 11m
Qantas Airways
Wed 3/606:35
STL
-
MEL
1 stop33h 10m
Qantas Airways
Deal found 29/4$1,549
Thu 28/509:45
MEL
-
STL
1 stop29h 11m
American Airlines
Thu 4/614:37
STL
-
MEL
2 stops25h 08m
American Airlines
Deal found 29/4$1,556
Thu 14/509:45
MEL
-
STL
1 stop29h 14m
American Airlines
Sat 23/506:35
STL
-
MEL
1 stop33h 10m
American Airlines
Deal found 26/4$1,557
Tue 12/509:45
MEL
-
STL
2 stops29h 17m
American Airlines
Sun 24/513:19
STL
-
MEL
2 stops26h 26m
American Airlines
Deal found 28/4$1,563
Thu 14/509:45
MEL
-
STL
2 stops24h 45m
American Airlines
Sun 24/514:37
STL
-
MEL
2 stops25h 08m
American Airlines
Deal found 28/4$1,564
Tue 6/1012:45
SYD
-
ORD
2 stops32h 20m
ANA
Mon 2/1116:25
ORD
-
SYD
1 stop25h 05m
ANA
Deal found 27/4$1,573
Thu 14/510:55
MEL
-
STL
1 stop22h 27m
United Airlines
Sun 24/513:38
STL
-
MEL
2 stops27h 37m
United Airlines
Deal found 26/4$1,573
Wed 13/510:55
MEL
-
STL
2 stops26h 35m
United Airlines
Mon 25/519:23
STL
-
MEL
1 stop21h 52m
United Airlines
Deal found 28/4$1,578

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 30 April 2026.

Round-trip from

$1,434

One-way from

$889

Popular in

April

Cheapest in

August

Average price

$2,228
20/5-28/5
  • 20/5-28/5
  • 4 total stops
  • 65h 18m total
  • Australia to Illinois
Search Deals
20/10
  • 20/10
  • 2 total stops
  • 30h 35m 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 30 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

Thu 28/5

09:45-23:56

1 stop29h 11m

Lambert-St Louis

Thu 4/6

06:35-06:45

1 stop33h 10m

$1,556

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 14/5

10:55-20:43

2 stops24h 48m

Lambert-St Louis

Fri 22/5

16:48-07:30

2 stops23h 42m

$1,573

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 13/5

10:55-22:30

2 stops26h 35m

Lambert-St Louis

Sun 24/5

19:23-08:15

1 stop21h 52m

$1,573
Fastest return journey

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 13/5

10:55-21:13

2 stops25h 18m

Lambert-St Louis

Mon 25/5

19:23-08:15

1 stop21h 52m

$1,580

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 27/5

10:00-19:03

2 stops24h 03m

Lambert-St Louis

Wed 3/6

08:53-07:50

2 stops31h 57m

$1,588

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 13/6

09:00-16:50

2 stops22h 50m

Lambert-St Louis

Sat 20/6

14:32-06:45

2 stops25h 13m

$1,626

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 14/6

09:20-20:25

2 stops50h 05m

Lambert-St Louis

Sun 21/6

13:20-07:20

3 stops51h 00m

$1,696

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Wed 17/6

13:13-07:00

2 stops26h 47m

$1,703

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

14:37-07:05

2 stops25h 28m

$1,745

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/9

09:45-22:55

1 stop28h 10m

Lambert-St Louis

Sun 27/9

18:51-05:00

1 stop43h 09m

$1,795

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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

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 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $172). Flying from Australia to Illinois in January is currently the most expensive (average of $1,178). 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 30 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
638 reviews
Check prices

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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
1,028 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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
9,677 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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
11,682 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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
10,982 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

7.9

Crew

8.5

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 American Airlines, United Airlines, and Air Canada fly from Australia to Illinois in about 24h 48m. The time it takes to get you to your destination can typically vary by up to 25h 17m. 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 Qantas Airways, which is currently one of the cheapest options available, starting at $648. Air New Zealand flights start at $741 while deals on Cathay Pacific start at $835 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 $172). Flying from Australia to Illinois in January is currently the most expensive (average of $1,178). 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 30 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$944Average$1,948FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,060Average$1,647FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,074Average$1,531FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,091Average$1,480FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,249Average$1,994FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,361Average$1,890FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,470Average$1,590FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,810Average$2,290FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Virgin AustraliaCheapest$2,125Average$2,152FlexibilityNo 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.