What airlines fly to Australia?

American Airlines, Qantas Airways and United Airlines are the top three most popular airlines that fly to Australia from Illinois according to our data. American Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 10 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

How long is the flight from Illinois to Australia?

Flight times from Illinois to Australia vary, but if you’re flying out of Chicago and flying into Sydney (one of the most popular routes), then the duration is 23h 21m on average. Another popular route from Illinois to Australia is flying from Peoria to Sydney, which will take roughly 24h 40m. Keep in mind that layovers or delays could extend your travel time.

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

Fiji Airways and ANA 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 November 2025, there are 10 operators 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$549 Cheap Flights from Illinois to Australia in 2025/26

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Find the cheapest flights from Illinois to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:15 pm - 9:00 amORD-SYD

25h 45m1 stop

7:05 am - 2:57 pmSYD-ORD

24h 52m2 stops

$991Qantas Airways

Find Deal

Thu, Jan 15 - Sat, Jan 24

4:37 pm - 8:45 amSTL-BNE

24h 08m2 stops

10:45 am - 3:29 pmBNE-STL

44h 44m2 stops

$999Multiple Airlines

Find Deal

Fri, Dec 5 - Tue, Dec 23

2:45 pm - 8:45 amSTL-BNE

26h 00m2 stops

10:45 am - 3:29 pmBNE-STL

44h 44m2 stops

$1,006Air Canada

Find Deal

Thu, Jan 29 - Thu, Feb 5

11:55 am - 8:20 amSTL-BNE

28h 25m2 stops

10:40 am - 8:45 pmBNE-STL

26h 05m2 stops

$1,072Delta

Find Deal

Mon, Feb 16 - Fri, Feb 20

12:50 pm - 8:35 amORD-SYD

27h 45m2 stops

10:20 am - 8:00 amSYD-ORD

37h 40m2 stops

$1,081Air Canada

Find Deal

Sun, Mar 8 - Sun, Mar 22

5:29 pm - 7:30 amSTL-BNE

22h 01m1 stop

11:40 am - 10:30 pmBNE-STL

26h 50m1 stop

$1,137United Airlines

Find Deal

Sat, Nov 22 - Fri, Dec 26

4:43 pm - 7:30 amSTL-BNE

22h 47m2 stops

11:40 am - 10:30 pmBNE-STL

26h 50m1 stop

$1,141United Airlines

Find Deal

Sat, Nov 22 - Fri, Dec 26

5:45 pm - 7:15 pmORD-SYD

34h 30m1 stop

11:50 am - 9:37 amSYD-ORD

36h 47m2 stops

$1,144ANA

Find Deal

Sun, May 3 - Sun, May 31

5:45 pm - 7:15 pmORD-SYD

34h 30m1 stop

11:50 am - 9:37 amSYD-ORD

36h 47m2 stops

$1,145ANA

Find Deal

Wed, Apr 22 - Tue, May 5

1:00 pm - 6:35 amMDW-SYD

26h 35m2 stops

9:25 am - 6:05 pmSYD-MDW

23h 40m2 stops

$1,268Delta

Find Deal

Sun, Apr 26 - Sun, May 3

Qantas Airways flights from Illinois to Australia

Our best Qantas Airways deals on Illinois to Australia flight tickets

Qantas Airways

Jan 15

ORD2:15 pmChicago O'Hare Intl

25h 45m

1 stop

SYD9:00 amSydney Kingsford Smith

Jan 24

SYD7:05 amSydney Kingsford Smith

24h 52m

2 stops

ORD2:57 pmChicago O'Hare Intl

$991

Find similar

Qantas Airways

Feb 25

ORD7:39 pmChicago O'Hare Intl

28h 36m

2 stops

MEL5:15 pmMelbourne

Mar 6

MEL12:00 pmMelbourne

21h 39m

1 stop

ORD4:39 pmChicago O'Hare Intl

$1,042

Find similar

Qantas Airways

Jan 20

ORD3:10 pmChicago O'Hare Intl

25h 20m

1 stop

MEL9:30 amMelbourne

Jan 30

MEL6:45 amMelbourne

27h 04m

2 stops

ORD4:49 pmChicago O'Hare Intl

$1,043

Find similar

Fiji Airways flights from Illinois to Australia

Our best Fiji Airways deals on Illinois to Australia flight tickets

Fiji Airways

Apr 7

ORD6:45 pmChicago O'Hare Intl

26h 00m

2 stops

SYD11:45 amSydney Kingsford Smith

Apr 18

SYD1:15 pmSydney Kingsford Smith

23h 01m

2 stops

ORD9:16 pmChicago O'Hare Intl

$1,158

Find similar

Fiji Airways

Feb 28

ORD5:11 pmChicago O'Hare Intl

26h 24m

2 stops

SYD12:35 pmSydney Kingsford Smith

Mar 7

SYD2:00 pmSydney Kingsford Smith

24h 35m

2 stops

ORD9:35 pmChicago O'Hare Intl

$1,180

Find similar

Fiji Airways

Apr 4

ORD6:45 pmChicago O'Hare Intl

26h 00m

2 stops

SYD11:45 amSydney Kingsford Smith

Apr 25

SYD1:15 pmSydney Kingsford Smith

23h 01m

2 stops

ORD9:16 pmChicago O'Hare Intl

$1,215

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 1/15

2:15 pm-9:00 am

1 stop25h 45m

Sydney Kingsford Smith

Sat 1/24

7:05 am-2:57 pm

2 stops24h 52m

$991

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 12/5

4:37 pm-8:45 am

2 stops24h 08m

Brisbane

Tue 12/23

10:45 am-3:29 pm

2 stops44h 44m

$999

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 1/29

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

Thu 2/5

10:45 am-3:29 pm

2 stops44h 44m

$1,006

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 2/16

11:55 am-8:20 am

2 stops28h 25m

Brisbane

Fri 2/20

10:40 am-8:45 pm

2 stops26h 05m

$1,072

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 3/8

12:50 pm-8:35 am

2 stops27h 45m

Sydney Kingsford Smith

Sun 3/22

10:20 am-8:00 am

2 stops37h 40m

$1,081

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 11/22

5:29 pm-7:30 am

1 stop22h 01m

Brisbane

Fri 12/26

11:40 am-10:30 pm

1 stop26h 50m

$1,137

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 11/22

4:43 pm-7:30 am

2 stops22h 47m

Brisbane

Fri 12/26

11:40 am-10:30 pm

1 stop26h 50m

$1,141

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 5/3

5:45 pm-7:15 pm

1 stop34h 30m

Sydney Kingsford Smith

Sun 5/31

11:50 am-9:37 am

2 stops36h 47m

$1,144

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 4/22

5:45 pm-7:15 pm

1 stop34h 30m

Sydney Kingsford Smith

Tue 5/5

11:50 am-9:37 am

2 stops36h 47m

$1,145

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 4/26

1:00 pm-6:35 am

2 stops26h 35m

Sydney Kingsford Smith

Sun 5/3

9:25 am-6:05 pm

2 stops23h 40m

$1,268

Flights are sorted by cheapest round-trip 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?

The month of August is, on average, the cheapest month to fly to Australia from Illinois, with most prices found around $851. If you aren’t able to travel during the month of August, then book flights to Australia from Illinois during September instead. Flights to Australia in September, while not as cheap as those in August, still average around $856.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from Illinois to Australia is on a Saturday. Travelers who choose to depart for Australia on a Saturday will often find tickets for as low as $935. On the other hand, Thursday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,415.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from Illinois in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,185 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,417 on average. Flights to Australia from Illinois in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,071 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Illinois for as low as $859 on momondo.

Can stopping save me money on Illinois to Australia flights?

You could potentially save up to 20% 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

Direct flights	None

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 November 2025, there are 10 operators 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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 $673	Free Cancellation	Rating 7.5 929 reviews	Search Qantas Airways flights
ANA	PriceFrom $679	Free Cancellation	Rating 8.4 1,003 reviews	Search ANA flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $772	Free Cancellation	Rating 8.1 209 reviews	Search Fiji Airways flights
Delta	PriceFrom $846	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
United Airlines	PriceFrom $870	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,416 reviews	Search Air Canada flights
Qatar Airways	PriceFrom $1,229	Free Cancellation	Rating 7.4 3,661 reviews	Search Qatar Airways flights
Air New Zealand	PriceFrom $1,264	Free Cancellation	Rating 8.0 526 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,055 reviews	Search Cathay Pacific flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Australia for you.

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

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

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

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 Australia from Illinois.

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

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