What is the cheapest airline that flies from Illinois to Australia?

United Airlines, Air Canada, and Qantas Airways are the most popular carriers operating from Illinois to Australia

How long is the flight from Illinois to Australia?

The flight from Illinois to Australia depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Chicago (a popular airport in Illinois) to Sydney (the most popular airport in Australia), then the flight time is 23h 32m on average. If you fly from Peoria (another popular airport in Illinois) to Sydney, then the average flight time is 27h 05m.

When did momondo last update prices for flights from Illinois to Australia?

Prices for flights from Illinois to Australia refresh daily.

How many operators does momondo search for flights from Illinois to Australia?

As of August 2026, there is 1 operator available to choose from for flights from Illinois to Australia.

How old do you have to be to fly from Illinois to Australia?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$848 Cheap Flights from Illinois to Australia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:10 - 10:00ORD Chicago O'Hare Intl-BNE Brisbane

27h 50m2 stops Los Angeles Los Angeles Auckland Intl

08:20 - 18:54BNE Brisbane-ORD Chicago O'Hare Intl

26h 34m2 stops Auckland Intl Los Angeles Los Angeles

$1,729Air New Zealand

Tue, 19 Jan - Mon, 1 Feb

13:00 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 35m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 01m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Wed, 4 Nov - Wed, 11 Nov

14:10 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 25m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 18:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 59m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

15:48 - 10:40ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 52m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 21:35SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 40m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Tue, 1 Sep - Tue, 8 Sep

14:35 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 00m2 stops Los Angeles Los Angeles Auckland Intl

14:05 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 17m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Mon, 4 Jan - Mon, 8 Feb

11:00 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 35m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 27m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Mon, 1 Feb - Wed, 10 Feb

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 45m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 06m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Wed, 21 Oct - Mon, 9 Nov

16:45 - 10:40ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 55m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 21:35SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 40m2 stops Auckland Intl Los Angeles Los Angeles

$1,732Air New Zealand

Tue, 1 Sep - Tue, 8 Sep

11:55 - 14:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 55m2 stops Dallas/Fort Worth Auckland Intl

14:05 - 16:14SYD Sydney Kingsford Smith-STL Lambert-St Louis

19h 09m1 stop Dallas/Fort Worth

$1,759Qantas Airways

Tue, 2 Feb - Tue, 9 Feb

17:04 - 20:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 46m2 stops Dallas/Fort Worth Auckland Intl

11:20 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 39m1 stop Los Angeles Los Angeles

$1,825Qantas Airways

Wed, 3 Feb - Wed, 10 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,924Air Canada

Sun, 16 Aug - Sat, 22 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,929Air Canada

Thu, 13 Aug - Tue, 25 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,929Air Canada

Sun, 16 Aug - Sat, 22 Aug

19:48 - 12:20ORD Chicago O'Hare Intl-MEL Melbourne

25h 32m2 stops Vancouver Intl Brisbane

20:30 - 19:48MEL Melbourne-ORD Chicago O'Hare Intl

38h 18m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,936Air Canada

Sun, 16 Aug - Wed, 9 Sep

08:44 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 36m2 stops Calgary Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,939Air Canada

Thu, 13 Aug - Tue, 25 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Toronto Pearson Intl

$1,940Air Canada

Sun, 16 Aug - Sat, 22 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,982Air Canada

Thu, 13 Aug - Tue, 25 Aug

08:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,982Air Canada

Thu, 13 Aug - Thu, 20 Aug

06:00 - 07:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles Los Angeles

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles Los Angeles

$2,004Qantas Airways

Wed, 12 Aug - Tue, 18 Aug

06:36 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 19m1 stop Dallas/Fort Worth

16:30 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 29m2 stops Melbourne Los Angeles Los Angeles

$2,142Qantas Airways

Wed, 12 Aug - Tue, 18 Aug

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Air New Zealand flights from Illinois to Australia

Our best Air New Zealand deals on Illinois to Australia flight tickets

Air New Zealand

19 Jan

ORD14:10Chicago O'Hare Intl

27h 50m

2 stops

BNE10:00Brisbane

1 Feb

BNE08:20Brisbane

26h 34m

2 stops

ORD18:54Chicago O'Hare Intl

$1,729

Air New Zealand

1 Feb

ORD14:10Chicago O'Hare Intl

27h 25m

2 stops

SYD10:35Sydney Kingsford Smith

3 Mar

SYD09:55Sydney Kingsford Smith

25h 59m

2 stops

ORD18:54Chicago O'Hare Intl

$1,732

Air New Zealand

4 Nov

ORD13:00Chicago O'Hare Intl

26h 35m

2 stops

SYD08:35Sydney Kingsford Smith

18 Nov

SYD11:50Sydney Kingsford Smith

24h 06m

2 stops

ORD18:56Chicago O'Hare Intl

$1,733

United Airlines flights from Illinois to Australia

Our best United Airlines deals on Illinois to Australia flight tickets

United Airlines

20 Oct

STL11:10Lambert-St Louis

30h 05m

2 stops

MEL09:15Melbourne

3 Nov

MEL12:45Melbourne

22h 20m

1 stop

STL18:05Lambert-St Louis

$1,794

United Airlines

20 Oct

STL11:10Lambert-St Louis

30h 05m

2 stops

MEL09:15Melbourne

3 Nov

MEL12:45Melbourne

22h 20m

1 stop

STL18:05Lambert-St Louis

$1,796

United Airlines

23 Sept

STL12:59Lambert-St Louis

27h 31m

2 stops

MEL07:30Melbourne

24 Oct

MEL11:10Melbourne

46h 55m

2 stops

STL18:05Lambert-St Louis

$1,818

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Tue 19/1

14:10-10:00

2 stops27h 50m

Brisbane

Mon 1/2

08:20-18:54

2 stops26h 34m

$1,729

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 4/11

13:00-08:35

2 stops26h 35m

Sydney Kingsford Smith

Wed 11/11

09:55-18:56

2 stops26h 01m

$1,732

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

14:10-10:35

2 stops27h 25m

Sydney Kingsford Smith

Wed 3/3

09:55-18:54

2 stops25h 59m

$1,732

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/9

15:48-10:40

2 stops27h 52m

Sydney Kingsford Smith

Tue 8/9

09:55-21:35

2 stops26h 40m

$1,732

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 4/1

14:35-08:35

2 stops25h 00m

Sydney Kingsford Smith

Mon 8/2

14:05-20:22

2 stops23h 17m

$1,732

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

11:00-08:35

2 stops28h 35m

Sydney Kingsford Smith

Wed 10/2

09:55-20:22

2 stops27h 27m

$1,732

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 21/10

15:00-08:45

2 stops25h 45m

Sydney Kingsford Smith

Mon 9/11

11:50-18:56

2 stops24h 06m

$1,732

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/9

16:45-10:40

2 stops26h 55m

Sydney Kingsford Smith

Tue 8/9

09:55-21:35

2 stops26h 40m

$1,732

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 2/2

11:55-14:50

2 stops33h 55m

Sydney Kingsford Smith

Tue 9/2

14:05-16:14

1 stop19h 09m

$1,759

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

17:04-20:50

2 stops34h 46m

Sydney Kingsford Smith

Wed 10/2

11:20-23:59

1 stop29h 39m

$1,825

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to Australia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Australia?

In general, February is the cheapest month to fly from Illinois to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,808. If you don’t want to visit Australia in February, then you should wait until June to fly from Illinois, when ticket prices are also cheap, with an average price of $1,866.

How far in advance should I book a flight from Illinois to Australia?

You are more likely to see cheaper flights to Australia from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $2,012 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Illinois for as low as $1,645 on momondo.

Can stopping save me money on Illinois to Australia flights?

You could potentially save up to 5% on your flight if you consider stops on a Illinois to Australia flight.

Cheap Illinois to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Australia

Fastest flight time	21h 06m
Direct flights	None

The fastest flight from Illinois to Australia takes 21h 06m

There are no direct flights from Illinois to Australia. There are no popular flight routes from Illinois to Australia.

Search flight deals

Frequently asked questions about flying from Illinois to Australia

When did momondo last update prices for flights from Illinois to Australia?
Prices for flights from Illinois to Australia refresh daily.
How many operators does momondo search for flights from Illinois to Australia?
As of August 2026, there is 1 operator available to choose from for flights from Illinois to Australia.
How old do you have to be to fly from Illinois to Australia?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Australia

Compare and see reviews for airlines that fly from Illinois to Australia with momondo

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $2,081	Free cancellation	Rating 7.5 1,081 reviews		Search Qantas Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Australia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Australia . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Illinois to Australia with flexible booking policies on momondo?

Flights from Illinois to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to Australia?

momondo provides multiple filters to help you find the best flight to Australia from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to Australia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Australia, momondo offers a useful price alert feature which will track prices for flights to Australia from Illinois and alert you when they change.