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 03m on average. If you fly from Peoria (another popular airport in Illinois) to Sydney, then the average flight time is 25h 05m.

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

Air Canada, EVA Air, and Qantas Airways 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 March 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.

$666 Cheap Flights from Illinois to Australia in 2026

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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.

07:30 - 10:35

ORD

BNE

36h 05m

2 stops

11:35 - 22:04

BNE

ORD

25h 29m

2 stops

$1,269Multiple Airlines

Wed, 6 May - Wed, 13 May

05:15 - 10:35

ORD

BNE

38h 20m

2 stops

11:35 - 22:04

BNE

ORD

25h 29m

2 stops

$1,337Multiple Airlines

Mon, 11 May - Wed, 20 May

07:30 - 12:05

ORD

MEL

37h 35m

2 stops

13:25 - 05:35

MEL

ORD

31h 10m

2 stops

$1,346Multiple Airlines

Wed, 6 May - Wed, 13 May

05:15 - 10:40

ORD

BNE

38h 25m

2 stops

11:55 - 05:35

BNE

ORD

32h 40m

2 stops

$1,365Multiple Airlines

Thu, 7 May - Thu, 14 May

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

10:15 - 14:45

BNE

ORD

19h 30m

1 stop

$1,387Air Canada

Sun, 31 May - Tue, 9 Jun

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

10:15 - 14:45

BNE

ORD

19h 30m

1 stop

$1,388Air Canada

Tue, 5 May - Tue, 26 May

21:15 - 11:50

ORD

ADL

48h 05m

2 stops

20:00 - 19:52

ADL

ORD

38h 22m

2 stops

$1,670Singapore Airlines

Mon, 29 Jun - Wed, 5 Aug

18:11 - 19:20

STL

MEL

34h 09m

2 stops

07:30 - 22:59

MEL

STL

30h 29m

2 stops

$1,719Fiji Airways

Sat, 9 May - Sat, 16 May

18:11 - 19:20

STL

MEL

34h 09m

2 stops

07:30 - 22:59

MEL

STL

30h 29m

2 stops

$1,915Fiji Airways

Thu, 7 May - Thu, 14 May

15:38 - 05:00

STL

MEL

22h 22m

1 stop

09:45 - 23:08

MEL

STL

28h 23m

1 stop

$1,928Qantas Airways

Sat, 16 May - Thu, 13 Aug

United Airlines flights from Illinois to Australia

Our best United Airlines deals on Illinois to Australia flight tickets

United Airlines

26 Apr

STL19:05Lambert-St Louis

20h 50m

1 stop

SYD06:55Sydney Kingsford Smith

10 May

SYD10:20Sydney Kingsford Smith

25h 23m

2 stops

STL20:43Lambert-St Louis

$2,015

United Airlines

4 May

STL19:06Lambert-St Louis

20h 49m

1 stop

SYD06:55Sydney Kingsford Smith

18 May

SYD10:20Sydney Kingsford Smith

21h 37m

2 stops

STL16:57Lambert-St Louis

$2,022

United Airlines

18 May

STL14:35Lambert-St Louis

25h 55m

2 stops

MEL07:30Melbourne

16 Aug

MEL10:55Melbourne

24h 44m

2 stops

STL20:39Lambert-St Louis

$2,130

Qantas Airways flights from Illinois to Australia

Our best Qantas Airways deals on Illinois to Australia flight tickets

Qantas Airways

4 May

STL06:21Lambert-St Louis

44h 19m

2 stops

SYD17:40Sydney Kingsford Smith

18 May

SYD12:00Sydney Kingsford Smith

22h 30m

1 stop

STL19:30Lambert-St Louis

$1,870

Qantas Airways

5 Apr

STL18:50Lambert-St Louis

25h 05m

2 stops

BNE10:55Brisbane

15 Apr

BNE07:55Brisbane

24h 26m

2 stops

STL17:21Lambert-St Louis

$1,882

Qantas Airways

3 May

STL06:21Lambert-St Louis

31h 39m

1 stop

BNE05:00Brisbane

11 May

BNE08:00Brisbane

26h 30m

2 stops

STL19:30Lambert-St Louis

$1,889

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 6/5

07:30-10:35

2 stops36h 05m

Brisbane

Wed 13/5

11:35-22:04

2 stops25h 29m

$1,269

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Mon 11/5

05:15-10:35

2 stops38h 20m

Brisbane

Wed 20/5

11:35-22:04

2 stops25h 29m

$1,337

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 6/5

07:30-12:05

2 stops37h 35m

Melbourne

Wed 13/5

13:25-05:35

2 stops31h 10m

$1,346

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 7/5

05:15-10:40

2 stops38h 25m

Brisbane

Thu 14/5

11:55-05:35

2 stops32h 40m

$1,365

Fastest return journey

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 31/5

15:40-07:05

1 stop24h 25m

Brisbane

Tue 9/6

10:15-14:45

1 stop19h 30m

$1,387

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 5/5

15:40-07:05

1 stop24h 25m

Brisbane

Tue 26/5

10:15-14:45

1 stop19h 30m

$1,388

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 29/6

21:15-11:50

2 stops48h 05m

Adelaide

Wed 5/8

20:00-19:52

2 stops38h 22m

$1,670

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 9/5

18:11-19:20

2 stops34h 09m

Melbourne

Sat 16/5

07:30-22:59

2 stops30h 29m

$1,719

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 7/5

18:11-19:20

2 stops34h 09m

Melbourne

Thu 14/5

07:30-22:59

2 stops30h 29m

$1,915

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 16/5

15:38-05:00

1 stop22h 22m

Melbourne

Thu 13/8

09:45-23:08

1 stop28h 23m

$1,928

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 $1,668. If you don’t want to visit Australia in February, then you should wait until September to fly from Illinois, when ticket prices are also cheap, with an average price of $1,967.

How far in advance should I book a flight 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 $1,947 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 $1,536 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	19h 57m
Direct flights	None

The fastest flight from Illinois to Australia takes 19h 57m

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

Search flight deals

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 March 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 $1,964	Free cancellation	Rating 7.5 1,013 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.