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Cheap flights from Australia to Illinois from $687

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
19 May — 26 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 19 April 2026.

Fri 8/513:30
MEL
-
ORD
2 stops31h 29m
Multiple Airlines
Sun 31/507:15
ORD
-
MEL
2 stops38h 10m
Multiple Airlines
Deal found 15/4$1,481
Mon 4/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Fri 8/508:30
ORD
-
SYD
3 stops36h 20m
Multiple Airlines
Deal found 16/4$1,496
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$1,524
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$1,580
Tue 8/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Fri 11/917:45
ORD
-
SYD
1 stop34h 25m
ANA
Deal found 14/4$1,594
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$1,595
Tue 12/510:55
MEL
-
STL
2 stops25h 18m
Multiple Airlines
Tue 19/510:25
STL
-
MEL
2 stops30h 50m
Multiple Airlines
Deal found 14/4$1,630
Mon 1/609:00
MEL
-
STL
2 stops22h 33m
American Airlines
Mon 8/614:58
STL
-
MEL
2 stops24h 47m
American Airlines
Deal found 16/4$1,656
Wed 3/617:50
SYD
-
ORD
1 stop27h 14m
Multiple Airlines
Tue 23/621:13
ORD
-
SYD
1 stop43h 17m
Multiple Airlines
Deal found 14/4$1,674
Wed 2/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Fri 11/917:45
ORD
-
SYD
1 stop24h 40m
ANA
Deal found 17/4$1,677
Tue 12/509:45
MEL
-
STL
1 stop29h 14m
Qantas Airways
Tue 19/506:21
STL
-
MEL
1 stop33h 24m
Qantas Airways
Deal found 14/4$1,693
Tue 5/517:50
SYD
-
MDW
2 stops32h 19m
Multiple Airlines
Wed 20/506:00
MDW
-
SYD
2 stops34h 30m
Multiple Airlines
Deal found 15/4$1,697

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 19 April 2026.

Round-trip from

$1,481

One-way from

$687

Popular in

April

Cheapest in

August

Average price

$2,220
8/5-31/5
  • 8/5-31/5
  • 4 total stops
  • 69h 39m total
  • Australia to Illinois
Search Deals
25/7
  • 25/7
  • 3 total stops
  • 43h 49m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($200 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($68 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 19 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

Tue 12/5

09:45-23:59

1 stop29h 14m

Lambert-St Louis

Tue 19/5

12:27-06:45

2 stops27h 18m

$1,595

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 1/6

09:00-16:33

2 stops22h 33m

Lambert-St Louis

Mon 8/6

14:58-06:45

2 stops24h 47m

$1,656

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 29/5

20:45-20:09

3 stops38h 24m

Lambert-St Louis

Tue 2/6

14:15-11:05

3 stops29h 50m

$1,913

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$2,054

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 10/5

15:40-15:21

2 stops38h 41m

Chicago O'Hare Intl

Thu 14/5

14:00-16:50

1 stop35h 50m

$2,087

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/7

09:15-23:53

2 stops29h 38m

Lambert-St Louis

Tue 11/8

12:10-06:50

2 stops27h 40m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 23/7

09:15-18:59

2 stops24h 44m

Lambert-St Louis

Sun 9/8

15:57-06:50

2 stops23h 53m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 28/7

09:15-23:22

2 stops29h 07m

Lambert-St Louis

Wed 12/8

12:10-06:50

2 stops27h 40m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 29/7

09:15-16:51

2 stops22h 36m

Lambert-St Louis

Sun 9/8

08:48-06:50

2 stops31h 02m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/7

09:15-22:12

2 stops27h 57m

Lambert-St Louis

Sun 9/8

11:18-06:50

2 stops28h 32m

$2,094

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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, September is the cheapest month in which you can book a flight from Australia to Illinois (average of $171). Flying from Australia to Illinois in January is currently the most expensive (average of $1,174). 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 19 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
630 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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
1,020 reviews
Air New Zealand
8.0
Very Good
630 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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
9,605 reviews
Air New Zealand
8.0
Very Good
630 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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
11,617 reviews
Air New Zealand
8.0
Very Good
630 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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
10,939 reviews
Air New Zealand
8.0
Very Good
630 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.4

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 American Airlines, Air Canada, and Delta fly from Australia to Illinois in about 29h 14m. The time it takes to get you to your destination can typically vary by up to 9h 10m. 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 $177. Qantas Airways flights start at $645 while deals on Air New Zealand start at $739 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 $171). Flying from Australia to Illinois in January is currently the most expensive (average of $1,174). 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$941Average$1,803FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,056Average$1,612FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,071Average$1,525FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,087Average$1,475FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,244Average$2,047FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,356Average$1,874FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,465Average$1,581FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,803Average$2,225FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Virgin AustraliaCheapest$2,117Average$2,144FlexibilityNo 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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