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Cheap flights from Australia to Illinois from $826

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 26/6. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
23 Mar — 30 Mar1
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 21 February 2026.

Wed 18/219:40
BNE
-
ORD
2 stops53h 45m
American Airlines
Sat 21/206:00
ORD
-
BNE
1 stop31h 00m
American Airlines
Deal found 17/2$1,109
Thu 19/209:40
BNE
-
STL
1 stop21h 48m
American Airlines
Mon 23/209:35
STL
-
BNE
1 stop28h 55m
American Airlines
Deal found 17/2$1,111
Fri 20/213:00
MEL
-
STL
2 stops24h 26m
United Airlines
Mon 23/213:11
STL
-
MEL
2 stops27h 49m
United Airlines
Deal found 18/2$1,265
Fri 6/311:40
BNE
-
STL
2 stops27h 19m
United Airlines
Thu 12/307:41
STL
-
BNE
2 stops31h 49m
United Airlines
Deal found 17/2$1,272
Wed 18/309:10
MEL
-
STL
2 stops30h 15m
Delta
Wed 25/312:28
STL
-
MEL
2 stops26h 32m
Delta
Deal found 17/2$1,275
Tue 17/319:40
BNE
-
ORD
2 stops37h 24m
American Airlines
Wed 1/411:31
ORD
-
BNE
1 stop26h 29m
American Airlines
Deal found 20/2$1,305
Wed 15/410:00
BNE
-
ORD
1 stop19h 43m
Air Canada
Wed 22/414:35
ORD
-
BNE
2 stops25h 30m
Air Canada
Deal found 20/2$1,322
Thu 19/219:50
BNE
-
STL
2 stops37h 23m
Qantas Airways
Mon 23/218:18
STL
-
BNE
1 stop20h 12m
Qantas Airways
Deal found 18/2$1,333
Tue 10/310:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Wed 25/315:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 18/2$1,354
Tue 2/609:20
SYD
-
ORD
2 stops22h 45m
Air Canada
Tue 4/815:40
ORD
-
SYD
1 stop24h 40m
Air Canada
Deal found 17/2$1,356
Wed 11/310:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Thu 26/307:15
ORD
-
SYD
2 stops33h 20m
Air Canada
Deal found 19/2$1,363
Thu 5/311:20
SYD
-
ORD
1 stop25h 40m
Air Canada
Wed 18/315:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 17/2$1,366

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 21 February 2026.

Round-trip from

$1,272

One-way from

$826

Popular in

December

Cheapest in

April

Average price

$1,529
United Airlines
  • United Airlines
  • 6/3-12/3
  • 4 total stops
  • 59h 08m total
  • Australia to Illinois
Search Deals
United Airlines
  • United Airlines
  • 26/6
  • 2 total stops
  • 49h 16m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($335 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 21 February 2026.
Use the filters below to find and compare flights from Australia to Illinois that are best for you.

Fly from

Australia

Fly to

Illinois

Route

Depart

Return

Price

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 6/3

11:40-22:59

2 stops27h 19m

Lambert-St Louis

Thu 12/3

07:41-06:30

2 stops31h 49m

$1,272

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 17/3

19:40-18:04

2 stops37h 24m

Chicago O'Hare Intl

Wed 1/4

13:31-05:00

2 stops24h 29m

$1,306

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Wed 15/4

10:00-14:43

1 stop19h 43m

Chicago O'Hare Intl

Wed 22/4

08:50-07:05

1 stop31h 15m

$1,322

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 2/6

09:20-20:05

1 stop25h 45m

Chicago O'Hare Intl

Tue 4/8

15:40-07:20

1 stop24h 40m

$1,356

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 9/3

11:20-13:01

2 stops41h 41m

Chicago O'Hare Intl

Wed 11/3

15:35-08:35

1 stop25h 00m

$1,431

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/3

10:20-16:45

2 stops22h 25m

Chicago O'Hare Intl

Sun 15/3

18:25-08:35

2 stops46h 10m

$1,462

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 18/3

11:20-23:58

1 stop28h 38m

Lambert-St Louis

Wed 25/3

06:38-09:00

1 stop34h 22m

$1,479

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 18/3

12:00-20:00

2 stops24h 00m

Chicago O'Hare Intl

Tue 24/3

21:15-08:30

2 stops43h 15m

$1,493

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 16/3

12:00-21:35

1 stop25h 35m

Chicago O'Hare Intl

Mon 23/3

19:29-09:30

1 stop22h 01m

$1,499

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:20-23:58

1 stop28h 38m

Lambert-St Louis

Mon 16/3

14:31-09:00

2 stops26h 29m

$1,499

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 60 results
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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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $860). Flying from Australia to Illinois in December is currently the most expensive (average of $1,503). 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 21 February 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
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air New Zealand
8.0
Very Good
590 reviews
Air New Zealand
8.0
Very Good
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Qantas Airways
7.5
Good
995 reviews
Air New Zealand
8.0
Very Good
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
United Airlines
7.4
Good
9,335 reviews
Air New Zealand
8.0
Very Good
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
American Airlines
7.2
Good
11,335 reviews
Air New Zealand
8.0
Very Good
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air Canada
7.1
Good
10,734 reviews
Air New Zealand
8.0
Very Good
590 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.4

Entertainment

7.4

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.

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 American Airlines fly from Australia to Illinois in about 27h 19m. The time it takes to get you to your destination can typically vary by up to 10h 05m. There are 14074 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 $565 while deals on Air New Zealand start at $751 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 $860). Flying from Australia to Illinois in December is currently the most expensive (average of $1,503). 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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$931Average$1,517FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,073Average$1,602FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,088Average$1,544FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,105Average$1,498FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,251Average$1,988FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,378Average$1,913FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,488Average$1,606FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,832Average$2,261FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Qatar AirwaysCheapest$2,312Average$2,978FlexibilityNo cancel feeOn-time68%
Search Qatar Airways 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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