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

ANA, Delta, and American Airlines are the most popular carriers operating from Chicago to Australia

When did momondo last update prices for flights from Chicago to Australia?

Prices for flights from Chicago to Australia are updated daily.

How many operators does momondo search for flights from Chicago to Australia?

As of May 2026, there is 1 operator available to choose from for flights from Chicago to Australia.

How old do you have to be to fly from Chicago to Australia?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 licence 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.

$679 Cheap Flights from Chicago to Australia in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:49 - 11:50

ORD

SYD

33h 01m

3 stops

13:15 - 10:48

SYD

ORD

36h 33m

3 stops

$1,646Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

06:55 - 12:05

ORD

MEL

38h 10m

3 stops

13:30 - 20:32

MEL

ORD

46h 02m

3 stops

$1,661Multiple Airlines

Wed, 27 May - Sun, 7 Jun

17:45 - 09:25

ORD

SYD

24h 40m

1 stop

20:55 - 08:40

SYD

ORD

26h 45m

1 stop

$1,720ANA

Tue, 1 Sep - Tue, 8 Sep

17:45 - 09:25

ORD

SYD

24h 40m

1 stop

20:55 - 14:55

SYD

ORD

33h 00m

1 stop

$1,721ANA

Tue, 25 Aug - Sun, 6 Sep

17:10 - 11:55

ORD

ADL

28h 15m

2 stops

06:00 - 18:12

ADL

ORD

26h 42m

2 stops

$1,965Qantas Airways

Thu, 2 Jul - Sun, 2 Aug

09:15 - 07:05

ORD

BNE

30h 50m

2 stops

10:15 - 05:01

BNE

ORD

33h 46m

2 stops

$1,967Air Canada

Fri, 28 Aug - Thu, 10 Sep

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

10:00 - 14:41

BNE

ORD

19h 41m

1 stop

$1,971Air Canada

Wed, 17 Jun - Fri, 10 Jul

19:21 - 11:05

ORD

ADL

25h 14m

2 stops

06:00 - 15:52

ADL

ORD

24h 22m

2 stops

$2,007Qantas Airways

Thu, 14 May - Sat, 23 May

13:05 - 07:50

MDW

MEL

27h 45m

2 stops

11:00 - 18:31

MEL

MDW

23h 31m

2 stops

$2,228Delta

Fri, 25 Sep - Sun, 4 Oct

13:00 - 07:50

MDW

MEL

27h 50m

2 stops

11:00 - 18:31

MEL

MDW

23h 31m

2 stops

$2,238Delta

Fri, 25 Sep - Sun, 4 Oct

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ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

1 Sept

ORD17:45Chicago O'Hare Intl

24h 40m

1 stop

SYD09:25Sydney Kingsford Smith

8 Sept

SYD20:55Sydney Kingsford Smith

26h 45m

1 stop

ORD08:40Chicago O'Hare Intl

$1,720

ANA

25 Aug

ORD17:45Chicago O'Hare Intl

24h 40m

1 stop

SYD09:25Sydney Kingsford Smith

6 Sept

SYD20:55Sydney Kingsford Smith

33h 00m

1 stop

ORD14:55Chicago O'Hare Intl

$1,721

ANA

25 Aug

ORD19:50Chicago O'Hare Intl

32h 20m

2 stops

SYD19:10Sydney Kingsford Smith

6 Sept

SYD20:55Sydney Kingsford Smith

33h 00m

1 stop

ORD14:55Chicago O'Hare Intl

$1,728

Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

25 Sept

MDW13:05Chicago Midway

27h 45m

2 stops

MEL07:50Melbourne

4 Oct

MEL11:00Melbourne

23h 31m

2 stops

MDW18:31Chicago Midway

$2,228

Delta

25 Sept

MDW13:00Chicago Midway

27h 50m

2 stops

MEL07:50Melbourne

4 Oct

MEL11:00Melbourne

23h 31m

2 stops

MDW18:31Chicago Midway

$2,238

Delta

26 June

MDW13:21Chicago Midway

27h 29m

2 stops

MEL07:50Melbourne

5 July

MEL10:00Melbourne

27h 17m

2 stops

MDW22:17Chicago Midway

$2,255

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 14/9

11:49-11:50

3 stops33h 01m

Sydney Kingsford Smith

Sun 20/9

13:15-10:48

3 stops36h 33m

$1,646

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 27/5

06:55-12:05

3 stops38h 10m

Melbourne

Sun 7/6

13:30-20:32

3 stops46h 02m

$1,661

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 1/9

17:45-09:25

1 stop24h 40m

Sydney Kingsford Smith

Tue 8/9

20:55-08:40

1 stop26h 45m

$1,720

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 25/8

17:45-09:25

1 stop24h 40m

Sydney Kingsford Smith

Sun 6/9

20:55-14:55

1 stop33h 00m

$1,721

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 2/7

17:10-11:55

2 stops28h 15m

Adelaide

Sun 2/8

06:00-18:12

2 stops26h 42m

$1,965

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Fri 28/8

09:15-07:05

2 stops30h 50m

Brisbane

Thu 10/9

10:15-05:01

2 stops33h 46m

$1,967

Fastest return journey

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 17/6

15:40-07:05

1 stop24h 25m

Brisbane

Fri 10/7

10:00-14:41

1 stop19h 41m

$1,971

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 14/5

19:21-11:05

2 stops25h 14m

Adelaide

Sat 23/5

06:00-15:52

2 stops24h 22m

$2,007

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Fri 25/9

13:05-07:50

2 stops27h 45m

Melbourne

Sun 4/10

11:00-18:31

2 stops23h 31m

$2,228

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Fri 25/9

13:00-07:50

2 stops27h 50m

Melbourne

Sun 4/10

11:00-18:31

2 stops23h 31m

$2,238

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 Chicago 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

What is the cheapest month to fly to Australia?

In general, November is the cheapest month to fly from Chicago 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 Chicago, when ticket prices are also cheap, with an average price of $193.

How far in advance should I book a flight from Chicago to Australia?

You are more likely to see cheaper flights to Australia from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,936 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 Chicago for as low as $1,619 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 1% on your flight if you consider stops on a Chicago to Australia flight.

Cheap Chicago to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Australia

Fastest flight time	21h 04m
Direct flights	None

The fastest flight from Chicago to Australia takes 21h 04m

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

Search flight deals

Frequently asked questions about flying from Chicago to Australia

When did momondo last update prices for flights from Chicago to Australia?
Prices for flights from Chicago to Australia are updated daily.
How many operators does momondo search for flights from Chicago to Australia?
As of May 2026, there is 1 operator available to choose from for flights from Chicago to Australia.
How old do you have to be to fly from Chicago to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 licence 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 Chicago to Australia

Compare and see reviews for airlines that fly from Chicago to Australia with momondo

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $2,053	Free cancellation	Rating 7.5 1,028 reviews		Search Qantas Airways flights

Why use momondo?

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

Finding the right flight to Australia from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Australia quick and easy, saving you time and money.

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

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

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

Once all potential Chicago to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Chicago 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 Chicago and alert you when they change.