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

Delta, Air New Zealand, and United Airlines are the most popular carriers operating from Australia to Illinois

Which airlines fly to Illinois?

Qantas Airways, United Airlines and Air Canada are the top three most popular airlines that fly to Illinois from Australia according to our data. Qantas Airways is the first choice among our users, with 56% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How long is the flight from Australia to Illinois?

If you’re flying from a popular airport in Australia, such as Sydney or Melbourne, and flying into Illinois, then you can expect flight times to average 19h 45m and 20h 57m, respectively.

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

Prices for flights from Australia to Illinois are updated daily.

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

As of January 2026, there are 9 operators available to choose from for flights from Australia to Illinois.

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

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 Australia to Illinois.

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

The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$838 Cheap Flights from Australia to Illinois in 2026

1 adult

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Find the cheapest flights from Australia to Illinois

Round-trip

One-way

Last minute

Recent return flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

19:40 - 08:51

BNE

STL

29h 11m

2 stops

08:31 - 05:00

STL

BNE

28h 29m

2 stops

$1,256American Airlines

Thu, 5 Feb - Mon, 9 Feb

19:40 - 23:59

BNE

STL

20h 19m

1 stop

07:45 - 05:00

STL

BNE

29h 15m

2 stops

$1,258American Airlines

Thu, 5 Feb - Mon, 9 Feb

10:45 - 14:41

BNE

ORD

19h 56m

1 stop

07:15 - 07:45

ORD

BNE

33h 30m

2 stops

$1,316Air Canada

Thu, 5 Mar - Tue, 10 Mar

11:30 - 22:59

MEL

STL

28h 29m

2 stops

17:25 - 10:00

STL

MEL

23h 35m

1 stop

$1,317United Airlines

Fri, 13 Feb - Mon, 23 Feb

10:30 - 20:41

MEL

STL

26h 11m

2 stops

11:15 - 08:15

STL

MEL

30h 00m

2 stops

$1,320United Airlines

Fri, 27 Mar - Sun, 5 Apr

10:45 - 16:45

BNE

ORD

22h 00m

2 stops

13:12 - 07:45

ORD

BNE

27h 33m

2 stops

$1,323Air Canada

Thu, 5 Mar - Tue, 10 Mar

12:10 - 18:52

MEL

ORD

23h 42m

2 stops

12:55 - 10:55

ORD

MEL

29h 00m

2 stops

$1,425Air New Zealand

Fri, 30 Jan - Fri, 20 Feb

13:55 - 22:59

SYD

ORD

26h 04m

2 stops

16:00 - 08:45

ORD

SYD

24h 45m

2 stops

$1,434Air New Zealand

Mon, 2 Mar - Mon, 9 Mar

12:00 - 23:59

MEL

STL

28h 59m

1 stop

06:38 - 09:30

STL

MEL

34h 52m

1 stop

$1,667Qantas Airways

Sun, 1 Mar - Sun, 8 Mar

20:55 - 16:37

ADL

ORD

36h 12m

2 stops

16:44 - 11:50

ORD

ADL

27h 36m

2 stops

$1,747Qantas Airways

Sun, 1 Mar - Sun, 8 Mar

United Airlines flights from Australia to Illinois

Our best United Airlines deals on Australia to Illinois flight tickets

United Airlines

24 Jan

BNE11:40Brisbane

19h 57m

1 stop

STL15:37Lambert-St Louis

31 Jan

STL17:00Lambert-St Louis

22h 30m

1 stop

BNE07:30Brisbane

$1,277

United Airlines

13 Feb

MEL11:30Melbourne

28h 29m

2 stops

STL22:59Lambert-St Louis

23 Feb

STL17:25Lambert-St Louis

23h 35m

1 stop

MEL10:00Melbourne

$1,317

United Airlines

2 Mar

MEL11:30Melbourne

20h 15m

1 stop

ORD14:45Chicago O'Hare Intl

9 Mar

ORD18:20Chicago O'Hare Intl

22h 40m

1 stop

MEL09:00Melbourne

$1,519

Air Canada flights from Australia to Illinois

Our best Air Canada deals on Australia to Illinois flight tickets

Air Canada

5 Mar

BNE10:45Brisbane

19h 56m

1 stop

ORD14:41Chicago O'Hare Intl

10 Mar

ORD07:15Chicago O'Hare Intl

33h 30m

2 stops

BNE07:45Brisbane

$1,316

Air Canada

5 Mar

BNE10:45Brisbane

22h 00m

2 stops

ORD16:45Chicago O'Hare Intl

10 Mar

ORD13:12Chicago O'Hare Intl

27h 33m

2 stops

BNE07:45Brisbane

$1,323

Air Canada

5 Mar

BNE10:45Brisbane

25h 15m

1 stop

ORD20:00Chicago O'Hare Intl

10 Mar

ORD13:05Chicago O'Hare Intl

27h 40m

1 stop

BNE07:45Brisbane

$1,329

Fly from

Fly to

Route

Depart

Return

Price

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 5/2

19:40-08:51

2 stops29h 11m

Lambert-St Louis

Mon 9/2

08:31-05:00

2 stops28h 29m

$1,256

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 5/2

19:40-23:59

1 stop20h 19m

Lambert-St Louis

Mon 9/2

07:45-05:00

2 stops29h 15m

$1,258

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 5/3

10:45-14:41

1 stop19h 56m

Chicago O'Hare Intl

Tue 10/3

07:15-07:45

2 stops33h 30m

$1,316

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 13/2

11:30-22:59

2 stops28h 29m

Lambert-St Louis

Mon 23/2

17:25-10:00

1 stop23h 35m

$1,317

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 27/3

10:30-20:41

2 stops26h 11m

Lambert-St Louis

Sun 5/4

11:15-08:15

2 stops30h 00m

$1,320

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 5/3

10:45-16:45

2 stops22h 00m

Chicago O'Hare Intl

Tue 10/3

13:12-07:45

2 stops27h 33m

$1,323

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Fri 30/1

12:10-18:52

2 stops23h 42m

Chicago O'Hare Intl

Fri 20/2

12:55-10:55

2 stops29h 00m

$1,425

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/3

13:55-22:59

2 stops26h 04m

Chicago O'Hare Intl

Mon 9/3

16:00-08:45

2 stops24h 45m

$1,434

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 1/3

12:00-23:59

1 stop28h 59m

Lambert-St Louis

Sun 8/3

06:38-09:30

1 stop34h 52m

$1,667

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/3

20:55-16:37

2 stops36h 12m

Chicago O'Hare Intl

Sun 8/3

16:44-11:50

2 stops27h 36m

$1,747

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 Australia to Illinois

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 Illinois?

In general, February is the cheapest month to fly from Australia to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,107. If you’re not able to fly to Illinois in February, then March is your next best option. Flight prices from Australia to Illinois during March average around $1,107.

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

You are more likely to see cheaper flights to Illinois from Australia when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,425 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Australia for as low as $1,138 on momondo.

Can stopping save me money on Australia to Illinois flights?

You could potentially save up to 44% on your flight if you consider stops on a Australia to Illinois flight.

Cheap Australia to Illinois flight deals and tips

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

Fastest flight time	19h 07m
Direct flights	None

The fastest flight from Australia to Illinois takes 19h 07m

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

Search flight deals

When did momondo last update prices for flights from Australia to Illinois?
Prices for flights from Australia to Illinois are updated daily.
How many operators does momondo search for flights from Australia to Illinois?
As of January 2026, there are 9 operators available to choose from for flights from Australia to Illinois.
How old do you have to be to fly from Australia to Illinois?
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 Australia to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Australia to Illinois

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

Airline	Rating	Free cancellation	Price
American Airlines	PriceFrom $684	Free cancellation	Rating 7.2 11,154 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $947	Free cancellation	Rating 7.5 971 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,147	Free cancellation	Rating 8.0 572 reviews	Search Air New Zealand flights
Air Canada	PriceFrom $1,167	Free cancellation	Rating 7.1 10,628 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,319	Free cancellation	Rating 7.4 9,171 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $1,453	Free cancellation	Rating 7.6 1,133 reviews	Search Cathay Pacific flights
ANA	PriceFrom $1,569	Free cancellation	Rating 8.4 1,074 reviews	Search ANA flights
Japan Airlines	PriceFrom $1,932	Free cancellation	Rating 8.3 1,685 reviews	Search Japan Airlines flights
Qatar Airways	PriceFrom $2,438	Free cancellation	Rating 7.4 3,716 reviews	Search Qatar Airways flights

Why use momondo?

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

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

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

Yes. All flights to Illinois from Australia on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Australia.

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

Of course. momondo tracks the price of Australia to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.