How long is the flight from Australia to Illinois?

If you’re flying from a popular airport in Australia, such as Melbourne or Brisbane, and flying into Illinois, then you can expect flight times to average 21h 04m and 24h 47m, respectively.

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

American Airlines, Lufthansa, and Air Canada 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 33% 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.

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 April 2026, there are 8 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.

$889 Cheap Flights from Australia to Illinois in 2026

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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.

09:20 - 12:06

SYD

STL

41h 46m

2 stops

16:48 - 07:20

STL

SYD

23h 32m

2 stops

$1,434Multiple Airlines

Wed, 20 May - Thu, 28 May

09:20 - 12:06

SYD

STL

41h 46m

2 stops

16:48 - 07:20

STL

SYD

23h 32m

2 stops

$1,437Multiple Airlines

Wed, 20 May - Thu, 28 May

09:20 - 23:57

SYD

STL

53h 37m

2 stops

08:40 - 07:20

STL

SYD

31h 40m

2 stops

$1,497Air Canada

Wed, 10 Jun - Wed, 17 Jun

09:20 - 23:57

SYD

STL

29h 37m

2 stops

08:40 - 07:20

STL

SYD

55h 40m

2 stops

$1,501Air Canada

Wed, 10 Jun - Wed, 17 Jun

09:45 - 23:56

MEL

STL

29h 11m

1 stop

06:35 - 06:45

STL

MEL

33h 10m

1 stop

$1,549Qantas Airways

Wed, 27 May - Wed, 3 Jun

10:55 - 20:43

MEL

STL

24h 48m

2 stops

13:38 - 08:15

STL

MEL

27h 37m

2 stops

$1,573United Airlines

Thu, 14 May - Tue, 26 May

09:30 - 22:30

MEL

STL

28h 00m

2 stops

19:23 - 08:15

STL

MEL

21h 52m

1 stop

$1,578United Airlines

Wed, 13 May - Sun, 24 May

09:45 - 23:56

MEL

STL

29h 11m

1 stop

19:24 - 05:00

STL

MEL

42h 36m

1 stop

$1,584Qantas Airways

Sun, 14 Jun - Sun, 21 Jun

12:10 - 23:10

MEL

ORD

26h 00m

2 stops

14:13 - 10:55

ORD

MEL

29h 42m

2 stops

$2,086Air New Zealand

Wed, 2 Sep - Wed, 9 Sep

09:40 - 21:47

BNE

ORD

27h 07m

2 stops

16:45 - 11:05

ORD

BNE

27h 20m

2 stops

$2,302Air New Zealand

Tue, 18 Aug - Tue, 1 Sep

Qatar Airways flights from Australia to Illinois

Our best Qatar Airways deals on Australia to Illinois flight tickets

Qatar Airways

21 Oct

MEL23:45Melbourne

36h 00m

2 stops

ORD19:45Chicago O'Hare Intl

5 Nov

ORD18:50Chicago O'Hare Intl

35h 30m

1 stop

MEL23:20Melbourne

$1,911

Qatar Airways

2 Sept

MEL22:45Melbourne

31h 20m

1 stop

ORD15:05Chicago O'Hare Intl

9 Sept

ORD16:45Chicago O'Hare Intl

33h 05m

2 stops

MEL16:50Melbourne

$2,036

Qatar Airways

4 May

SYD20:45Sydney Kingsford Smith

42h 40m

2 stops

ORD00:25Chicago O'Hare Intl

8 May

ORD19:20Chicago O'Hare Intl

31h 10m

1 stop

SYD17:30Sydney Kingsford Smith

$2,847

Cathay Pacific flights from Australia to Illinois

Our best Cathay Pacific deals on Australia to Illinois flight tickets

Cathay Pacific

26 Oct

BNE12:10Brisbane

40h 45m

1 stop

ORD13:55Chicago O'Hare Intl

16 Nov

ORD14:35Chicago O'Hare Intl

40h 35m

1 stop

BNE23:10Brisbane

$2,127

Cathay Pacific

2 May

BNE16:25Brisbane

60h 30m

2 stops

ORD13:55Chicago O'Hare Intl

9 May

ORD16:15Chicago O'Hare Intl

49h 05m

2 stops

BNE08:20Brisbane

$3,127

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,434

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,437

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

09:20-23:57

2 stops53h 37m

Lambert-St Louis

Wed 17/6

08:40-07:20

2 stops31h 40m

$1,497

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

09:20-23:57

2 stops29h 37m

Lambert-St Louis

Wed 17/6

08:40-07:20

2 stops55h 40m

$1,501

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 27/5

09:45-23:56

1 stop29h 11m

Lambert-St Louis

Wed 3/6

06:35-06:45

1 stop33h 10m

$1,549

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 14/5

10:55-20:43

2 stops24h 48m

Lambert-St Louis

Tue 26/5

13:38-08:15

2 stops27h 37m

$1,573

Fastest return journey

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 13/5

09:30-22:30

2 stops28h 00m

Lambert-St Louis

Sun 24/5

19:23-08:15

1 stop21h 52m

$1,578

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 14/6

09:45-23:56

1 stop29h 11m

Lambert-St Louis

Sun 21/6

19:24-05:00

1 stop42h 36m

$1,584

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 2/9

12:10-23:10

2 stops26h 00m

Chicago O'Hare Intl

Wed 9/9

14:13-10:55

2 stops29h 42m

$2,086

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 18/8

09:40-21:47

2 stops27h 07m

Chicago O'Hare Intl

Tue 1/9

16:45-11:05

2 stops27h 20m

$2,302

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, September 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 $172. If you’re not able to fly to Illinois in September, then October is your next best option. Flight prices from Australia to Illinois during October average around $182.

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 $1,864 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 $1,381 on momondo.

Can stopping save me money on Australia to Illinois flights?

You could potentially save up to 22% 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	20h 00m
Direct flights	None

The fastest flight from Australia to Illinois takes 20h 00m

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

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Frequently asked questions about flying from Australia to Illinois

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 April 2026, there are 8 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
Qantas Airways	PriceFrom $944	Free cancellation	Rating 7.5 1,028 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $1,060	Free cancellation	Rating 7.1 10,982 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $1,074	Free cancellation	Rating 8.0 638 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $1,091	Free cancellation	Rating 7.1 11,681 reviews	Search American Airlines flights
United Airlines	PriceFrom $1,249	Free cancellation	Rating 7.4 9,677 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $1,361	Free cancellation	Rating 7.6 1,310 reviews	Search Cathay Pacific flights
ANA	PriceFrom $1,470	Free cancellation	Rating 8.3 1,201 reviews	Search ANA flights
Japan Airlines	PriceFrom $1,810	Free cancellation	Rating 8.3 1,797 reviews	Search Japan Airlines flights
Virgin Australia	PriceFrom $2,125	Free cancellation	Rating 7.6 452 reviews	Search Virgin Australia 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.