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 25h 20m on average. If you fly from Peoria (another popular airport in Illinois) to Sydney, then the average flight time is 31h 10m.

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

Fiji Airways, Qantas Airways, and Air Canada are the most popular carriers operating 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 May 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.

$760 Cheap Flights from Illinois to Australia in 2026

1 adult

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Find the cheapest flights from Illinois to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:14 - 05:00

STL

MEL

26h 46m

1 stop

12:00 - 19:30

MEL

STL

24h 30m

1 stop

$1,508American Airlines

Tue, 27 Oct - Tue, 10 Nov

15:33 - 09:30

STL

MEL

25h 57m

2 stops

23:15 - 08:58

MEL

STL

26h 43m

2 stops

$1,513American Airlines

Tue, 27 Oct - Wed, 11 Nov

15:33 - 05:00

STL

MEL

21h 27m

1 stop

23:15 - 23:42

MEL

STL

41h 27m

1 stop

$1,530Qantas Airways

Tue, 27 Oct - Wed, 11 Nov

15:33 - 05:00

STL

MEL

21h 27m

1 stop

23:15 - 23:42

MEL

STL

41h 27m

1 stop

$1,563Qantas Airways

Tue, 27 Oct - Wed, 11 Nov

17:50 - 19:20

ORD

MEL

34h 30m

2 stops

07:30 - 21:02

MEL

ORD

28h 32m

2 stops

$1,664Multiple Airlines

Tue, 11 Aug - Sat, 15 Aug

08:40 - 07:20

STL

SYD

31h 40m

2 stops

09:20 - 18:41

SYD

STL

48h 21m

2 stops

$1,667Air Canada

Tue, 9 Jun - Wed, 9 Sep

14:15 - 07:20

STL

SYD

26h 05m

2 stops

09:20 - 18:41

SYD

STL

48h 21m

3 stops

$1,678Air Canada

Tue, 9 Jun - Wed, 9 Sep

07:15 - 12:00

ORD

MEL

37h 45m

3 stops

13:25 - 06:17

MEL

ORD

31h 52m

2 stops

$1,696Multiple Airlines

Thu, 6 Aug - Wed, 12 Aug

19:50 - 19:10

ORD

SYD

32h 20m

2 stops

11:45 - 08:40

SYD

ORD

35h 55m

1 stop

$1,773ANA

Wed, 26 Aug - Thu, 3 Sep

17:45 - 19:10

ORD

SYD

34h 25m

1 stop

11:45 - 08:40

SYD

ORD

35h 55m

1 stop

$1,775ANA

Wed, 26 Aug - Thu, 3 Sep

ANA flights from Illinois to Australia

Our best ANA deals on Illinois to Australia flight tickets

ANA

26 Aug

ORD19:50Chicago O'Hare Intl

32h 20m

2 stops

SYD19:10Sydney Kingsford Smith

3 Sept

SYD11:45Sydney Kingsford Smith

35h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,773

ANA

26 Aug

ORD17:45Chicago O'Hare Intl

34h 25m

1 stop

SYD19:10Sydney Kingsford Smith

3 Sept

SYD11:45Sydney Kingsford Smith

35h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,775

ANA

31 Aug

ORD19:50Chicago O'Hare Intl

32h 20m

2 stops

SYD19:10Sydney Kingsford Smith

1 Nov

SYD12:25Sydney Kingsford Smith

33h 40m

2 stops

ORD06:05Chicago O'Hare Intl

$1,780

Air New Zealand flights from Illinois to Australia

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

Air New Zealand

10 June

STL13:13Lambert-St Louis

26h 42m

2 stops

SYD06:55Sydney Kingsford Smith

17 June

SYD10:20Sydney Kingsford Smith

21h 13m

2 stops

STL16:33Lambert-St Louis

$1,862

Air New Zealand

22 Aug

STL16:40Lambert-St Louis

47h 20m

2 stops

SYD07:00Sydney Kingsford Smith

8 Sept

SYD09:30Sydney Kingsford Smith

22h 04m

2 stops

STL16:34Lambert-St Louis

$1,884

Air New Zealand

26 Aug

STL13:36Lambert-St Louis

26h 24m

2 stops

SYD07:00Sydney Kingsford Smith

12 Sept

SYD10:20Sydney Kingsford Smith

25h 18m

2 stops

STL20:38Lambert-St Louis

$1,932

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 27/10

10:14-05:00

1 stop26h 46m

Melbourne

Tue 10/11

12:00-19:30

1 stop24h 30m

$1,508

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 27/10

15:33-09:30

2 stops25h 57m

Melbourne

Wed 11/11

23:15-08:58

2 stops26h 43m

$1,513

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 27/10

15:33-05:00

1 stop21h 27m

Melbourne

Wed 11/11

23:15-23:42

1 stop41h 27m

$1,530

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 27/10

15:33-05:00

1 stop21h 27m

Melbourne

Wed 11/11

23:15-23:42

1 stop41h 27m

$1,563

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Tue 11/8

17:50-19:20

2 stops34h 30m

Melbourne

Sat 15/8

07:30-21:02

2 stops28h 32m

$1,664

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 9/6

08:40-07:20

2 stops31h 40m

Sydney Kingsford Smith

Wed 9/9

09:20-18:41

2 stops48h 21m

$1,667

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 9/6

14:15-07:20

2 stops26h 05m

Sydney Kingsford Smith

Wed 9/9

09:20-18:41

3 stops48h 21m

$1,678

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Thu 6/8

07:15-12:00

3 stops37h 45m

Melbourne

Wed 12/8

13:25-06:17

2 stops31h 52m

$1,696

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 26/8

19:50-19:10

2 stops32h 20m

Sydney Kingsford Smith

Thu 3/9

11:45-08:40

1 stop35h 55m

$1,773

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 26/8

17:45-19:10

1 stop34h 25m

Sydney Kingsford Smith

Thu 3/9

11:45-08:40

1 stop35h 55m

$1,775

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, November 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 $158. If you don’t want to visit Australia in November, then you should wait until August to fly from Illinois, when ticket prices are also cheap, with an average price of $192.

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 $1,938 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 $1,570 on momondo.

Can stopping save me money on Illinois to Australia flights?

You could potentially save up to 19% 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	20h 20m
Direct flights	None

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

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 May 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 $2,050	Free cancellation	Rating 7.5 1,042 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.