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Cheap flights from Australia to Illinois from $636

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
27 Aug — 3 Sep1
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 28 July 2026.

Mon 17/809:20
SYD
-
ORD
2 stops39h 56m
Air Canada
Mon 31/808:50
ORD
-
SYD
2 stops31h 30m
Air Canada
Deal found 27/7$1,286
Sun 26/709:30
MEL
-
ORD
2 stops24h 05m
United Airlines
Sat 8/814:33
ORD
-
MEL
2 stops26h 42m
United Airlines
Deal found 24/7$1,368
Sun 23/810:55
MEL
-
ORD
1 stop20h 41m
United Airlines
Sun 30/816:00
ORD
-
MEL
1 stop25h 15m
United Airlines
Deal found 24/7$1,369
Fri 21/809:30
MEL
-
ORD
1 stop22h 35m
United Airlines
Fri 28/816:45
ORD
-
MEL
2 stops24h 30m
United Airlines
Deal found 24/7$1,385
Thu 6/809:20
SYD
-
ORD
2 stops44h 35m
Air Canada
Mon 10/810:41
ORD
-
SYD
2 stops29h 39m
Air Canada
Deal found 27/7$1,385
Thu 27/810:15
BNE
-
ORD
2 stops38h 20m
Air Canada
Sun 30/814:01
ORD
-
BNE
2 stops50h 04m
Air Canada
Deal found 27/7$1,389
Tue 28/710:55
MEL
-
ORD
1 stop29h 04m
United Airlines
Mon 3/821:35
ORD
-
MEL
1 stop43h 40m
United Airlines
Deal found 27/7$1,408
Wed 9/913:15
SYD
-
STL
3 stops37h 02m
Multiple Airlines
Wed 16/912:17
STL
-
SYD
3 stops32h 33m
Multiple Airlines
Deal found 26/7$1,409
Sun 6/913:15
SYD
-
ORD
2 stops31h 44m
Multiple Airlines
Sun 13/906:05
ORD
-
SYD
3 stops38h 45m
Multiple Airlines
Deal found 23/7$1,409
Fri 24/709:45
MEL
-
ORD
1 stop23h 27m
American Airlines
Sun 2/817:10
ORD
-
MEL
1 stop22h 35m
American Airlines
Deal found 23/7$1,434
Sun 6/913:30
MEL
-
ORD
2 stops31h 29m
Multiple Airlines
Sun 13/913:02
ORD
-
MEL
3 stops32h 23m
Multiple Airlines
Deal found 23/7$1,456
Thu 27/809:20
SYD
-
STL
2 stops23h 39m
Multiple Airlines
Thu 10/908:55
STL
-
SYD
2 stops31h 25m
Multiple Airlines
Deal found 27/7$1,459

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 28 July 2026.

Round-trip from

$1,286

One-way from

$636

Popular in

May

Cheapest in

October

Average price

$1,932
Air Canada
  • Air Canada
  • 17/8-31/8
  • 4 total stops
  • 71h 26m total
  • Australia to Illinois
Search Deals
25/8
  • 25/8
  • 2 total stops
  • 32h 02m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($208 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($35 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 28 July 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
Fastest return journey

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sun 23/8

10:55-16:36

1 stop20h 41m

Chicago O'Hare Intl

Sun 30/8

16:00-08:15

1 stop25h 15m

$1,369

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 6/8

09:20-14:55

2 stops44h 35m

Chicago O'Hare Intl

Mon 10/8

10:41-07:20

2 stops29h 39m

$1,385

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 27/8

10:15-14:36

1 stop19h 21m

Chicago O'Hare Intl

Sun 30/8

14:01-07:05

2 stops50h 04m

$1,389

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

11:20-23:15

3 stops28h 55m

Lambert-St Louis

Mon 16/11

08:50-09:35

2 stops31h 45m

$1,475

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 14/10

10:10-23:46

1 stop29h 36m

Lambert-St Louis

Sun 8/11

12:58-06:55

1 stop24h 57m

$1,501

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,514

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

10:20-17:59

1 stop22h 39m

Lambert-St Louis

Thu 10/9

13:36-07:00

2 stops26h 24m

$1,515

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

09:20-14:02

2 stops43h 42m

Lambert-St Louis

Thu 10/9

08:00-07:20

3 stops32h 20m

$1,548

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Thu 10/9

06:00-07:05

1 stop34h 05m

$1,551

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 14/10

11:20-16:37

2 stops21h 17m

Lambert-St Louis

Sun 8/11

11:15-09:05

2 stops28h 50m

$1,574

Flights are sorted by cheapest return flights first.

Deals found on 25/7

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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $1,609). Flying from Australia to Illinois in December is currently the most expensive (average of $1,999). 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.

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

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 28 July 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
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air New Zealand
8.0
Very Good
655 reviews
Air New Zealand
8.0
Very Good
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Qantas Airways
7.5
Good
1,067 reviews
Air New Zealand
8.0
Very Good
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
United Airlines
7.4
Good
10,046 reviews
Air New Zealand
8.0
Very Good
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
American Airlines
7.1
Good
11,841 reviews
Air New Zealand
8.0
Very Good
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.
Air Canada
7.1
Good
11,398 reviews
Air New Zealand
8.0
Very Good
655 reviews
Check prices

Boarding

8.2

Food

7.5

Overall

8.0

Entertainment

7.4

Comfort

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

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 Qantas Airways fly from Australia to Illinois in about 20h 41m. The time it takes to get you to your destination can typically vary by up to 23h 54m. 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 Qantas Airways, which is currently one of the cheapest options available, starting at $515. Air New Zealand flights start at $757 while deals on United Airlines start at $1,123 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 $1,609). Flying from Australia to Illinois in December is currently the most expensive (average of $1,999). 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 8 airlines flying from Australia to Illinois

Discover the top 8 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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$597Average$1,542FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,036Average$1,947FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,083Average$1,683FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,255Average$1,867FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air New ZealandCheapest$1,343Average$1,572FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Japan AirlinesCheapest$1,394Average$2,846FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Cathay PacificCheapest$1,700Average$1,991FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Virgin AustraliaCheapest$2,170Average$2,198FlexibilityNo 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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