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 16m on average. Another popular route from Illinois to Australia is flying from Peoria to Sydney, which will take roughly 26h 55m. 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, United Airlines, 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 September 2025, there are 8 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.

$498 Cheap Flights from Illinois to Australia in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Illinois to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

3:59 pm - 3:35 pmSTL-MEL

30h 36m2 stops

12:00 pm - 11:42 pmMEL-STL

28h 42m1 stop

$946Qantas Airways

Find Deal

Wed, Nov 5 - Wed, Nov 12

6:00 am - 9:30 amSTL-MEL

34h 30m1 stop

6:45 am - 11:08 pmMEL-STL

33h 23m2 stops

$955Qantas Airways

Find Deal

Wed, Feb 4 - Thu, Feb 26

12:23 pm - 9:00 amORD-SYD

28h 37m2 stops

2:05 pm - 12:11 amSYD-ORD

27h 06m2 stops

$1,051Multiple Airlines

Find Deal

Mon, Oct 27 - Sun, Nov 9

4:45 pm - 12:30 pmORD-SYD

26h 45m2 stops

2:10 pm - 7:18 pmSYD-ORD

22h 08m2 stops

$1,102Fiji Airways

Find Deal

Sat, Feb 7 - Sat, Feb 28

2:00 pm - 7:45 pmORD-SYD

36h 45m2 stops

9:40 pm - 1:04 pmSYD-ORD

32h 24m2 stops

$1,126Hawaiian Airlines

Find Deal

Tue, Feb 10 - Fri, Feb 27

7:00 am - 9:00 amSTL-SYD

34h 00m2 stops

11:20 am - 11:59 pmSYD-STL

29h 39m2 stops

$1,126Multiple Airlines

Find Deal

Wed, Oct 29 - Thu, Nov 13

4:25 pm - 10:30 amORD-SYD

25h 05m1 stop

12:25 pm - 5:16 amSYD-ORD

33h 51m2 stops

$1,139ANA

Find Deal

Tue, Nov 11 - Tue, Nov 18

2:00 pm - 7:45 pmORD-SYD

36h 45m2 stops

9:40 pm - 1:04 pmSYD-ORD

32h 24m2 stops

$1,147Hawaiian Airlines

Find Deal

Mon, Jan 12 - Mon, Jan 26

4:25 pm - 8:15 pmORD-SYD

34h 50m1 stop

12:25 pm - 8:54 amSYD-ORD

37h 29m2 stops

$1,152ANA

Find Deal

Mon, Feb 16 - Sun, Mar 1

5:49 pm - 12:30 pmSTL-SYD

25h 41m2 stops

2:10 pm - 11:08 pmSYD-STL

25h 58m2 stops

$1,161Fiji Airways

Find Deal

Tue, Feb 17 - Sun, Mar 1

Fiji Airways flights from Illinois to Australia

Our best Fiji Airways deals on Illinois to Australia flight tickets

Fiji Airways

Feb 7

ORD4:45 pmChicago O'Hare Intl

26h 45m

2 stops

SYD12:30 pmSydney Kingsford Smith

Feb 28

SYD2:10 pmSydney Kingsford Smith

22h 08m

2 stops

ORD7:18 pmChicago O'Hare Intl

$1,102

Find similar

Fiji Airways

Feb 17

STL5:49 pmLambert-St Louis

25h 41m

2 stops

SYD12:30 pmSydney Kingsford Smith

Mar 1

SYD2:10 pmSydney Kingsford Smith

25h 58m

2 stops

STL11:08 pmLambert-St Louis

$1,161

Find similar

Fiji Airways

Feb 14

STL5:49 pmLambert-St Louis

25h 41m

2 stops

SYD12:30 pmSydney Kingsford Smith

Feb 28

SYD2:10 pmSydney Kingsford Smith

25h 58m

2 stops

STL11:08 pmLambert-St Louis

$1,172

Find similar

Hawaiian Airlines flights from Illinois to Australia

Our best Hawaiian Airlines deals on Illinois to Australia flight tickets

Hawaiian Airlines

Feb 10

ORD2:00 pmChicago O'Hare Intl

36h 45m

2 stops

SYD7:45 pmSydney Kingsford Smith

Feb 27

SYD9:40 pmSydney Kingsford Smith

32h 24m

2 stops

ORD1:04 pmChicago O'Hare Intl

$1,126

Find similar

Hawaiian Airlines

Jan 12

ORD2:00 pmChicago O'Hare Intl

36h 45m

2 stops

SYD7:45 pmSydney Kingsford Smith

Jan 26

SYD9:40 pmSydney Kingsford Smith

32h 24m

2 stops

ORD1:04 pmChicago O'Hare Intl

$1,147

Find similar

Hawaiian Airlines

Jan 12

ORD2:00 pmChicago O'Hare Intl

36h 45m

2 stops

SYD7:45 pmSydney Kingsford Smith

Jan 26

SYD9:40 pmSydney Kingsford Smith

32h 24m

2 stops

ORD1:04 pmChicago O'Hare Intl

$1,149

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 11/5

3:59 pm-3:35 pm

2 stops30h 36m

Melbourne

Wed 11/12

12:00 pm-11:42 pm

1 stop28h 42m

$946

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 2/4

6:00 am-9:30 am

1 stop34h 30m

Melbourne

Thu 2/26

6:45 am-11:08 pm

2 stops33h 23m

$955

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/27

12:23 pm-9:00 am

2 stops28h 37m

Sydney Kingsford Smith

Sun 11/9

2:05 pm-12:11 am

2 stops27h 06m

$1,051

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/7

4:45 pm-12:30 pm

2 stops26h 45m

Sydney Kingsford Smith

Sat 2/28

2:10 pm-7:18 pm

2 stops22h 08m

$1,102

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 2/10

2:00 pm-7:45 pm

2 stops36h 45m

Sydney Kingsford Smith

Fri 2/27

9:40 pm-1:04 pm

2 stops32h 24m

$1,126

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 10/29

7:00 am-9:00 am

2 stops34h 00m

Sydney Kingsford Smith

Thu 11/13

11:20 am-11:59 pm

2 stops29h 39m

$1,126

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/11

4:25 pm-10:30 am

1 stop25h 05m

Sydney Kingsford Smith

Tue 11/18

12:25 pm-5:16 am

2 stops33h 51m

$1,139

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 1/12

2:00 pm-7:45 pm

2 stops36h 45m

Sydney Kingsford Smith

Mon 1/26

9:40 pm-1:04 pm

2 stops32h 24m

$1,147

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/16

4:25 pm-8:15 pm

1 stop34h 50m

Sydney Kingsford Smith

Sun 3/1

12:25 pm-8:54 am

2 stops37h 29m

$1,152

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 2/17

5:49 pm-12:30 pm

2 stops25h 41m

Sydney Kingsford Smith

Sun 3/1

2:10 pm-11:08 pm

2 stops25h 58m

$1,161

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 May instead. Flights to Australia in May, while not as cheap as those in August, still average around $867.

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 $1,108 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 9% 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 September 2025, there are 8 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 $647	Free Cancellation	Rating 7.5 908 reviews	Search Qantas Airways flights
ANA	PriceFrom $679	Free Cancellation	Rating 8.4 970 reviews	Search ANA flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $772	Free Cancellation	Rating 8.0 205 reviews	Search Fiji Airways flights
Delta	PriceFrom $846	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom $876	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights
Qatar Airways	PriceFrom $1,229	Free Cancellation	Rating 7.4 3,626 reviews	Search Qatar Airways flights
Air New Zealand	PriceFrom $1,264	Free Cancellation	Rating 8.0 505 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,008 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.