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

ANA, Qantas Airways, and Delta 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 June 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.

$842 Cheap Flights from Chicago to Australia in 2026

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.

09:28 - 12:00

ORD

MEL

35h 32m

3 stops

13:25 - 06:17

MEL

ORD

31h 52m

2 stops

$1,657Multiple Airlines

Thu, 30 Jul - Wed, 12 Aug

09:28 - 12:00

ORD

MEL

35h 32m

3 stops

13:25 - 06:17

MEL

ORD

31h 52m

2 stops

$1,681Multiple Airlines

Thu, 30 Jul - Wed, 12 Aug

20:00 - 20:15

ORD

SYD

31h 15m

2 stops

21:45 - 07:20

SYD

ORD

26h 35m

1 stop

$1,853ANA

Sat, 7 Nov - Wed, 18 Nov

17:45 - 19:10

ORD

SYD

34h 25m

1 stop

11:45 - 04:45

SYD

ORD

32h 00m

2 stops

$1,856ANA

Wed, 26 Aug - Tue, 1 Sep

08:45 - 07:20

ORD

SYD

31h 35m

1 stop

09:20 - 14:36

SYD

ORD

20h 16m

1 stop

$1,864Air Canada

Sun, 21 Jun - Tue, 7 Jul

08:45 - 07:20

ORD

SYD

31h 35m

1 stop

09:20 - 14:36

SYD

ORD

20h 16m

1 stop

$1,873Air Canada

Sun, 21 Jun - Tue, 7 Jul

13:00 - 08:30

MDW

SYD

26h 30m

2 stops

10:40 - 16:50

SYD

MDW

23h 10m

2 stops

$2,079Delta

Mon, 2 Nov - Fri, 20 Nov

13:51 - 06:50

MDW

SYD

25h 59m

2 stops

09:15 - 18:01

SYD

MDW

23h 46m

2 stops

$2,290Delta

Wed, 12 Aug - Sun, 23 Aug

16:45 - 13:40

ORD

ADL

30h 25m

2 stops

12:05 - 21:32

ADL

ORD

23h 57m

2 stops

$2,320Air New Zealand

Mon, 10 Aug - Wed, 19 Aug

16:45 - 13:40

ORD

ADL

30h 25m

2 stops

12:05 - 06:19

ADL

ORD

32h 44m

2 stops

$2,323Air New Zealand

Mon, 10 Aug - Wed, 19 Aug

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Air Canada flights from Chicago to Australia

Our best Air Canada deals on Chicago to Australia flight tickets

Air Canada

21 June

ORD08:45Chicago O'Hare Intl

31h 35m

1 stop

SYD07:20Sydney Kingsford Smith

7 July

SYD09:20Sydney Kingsford Smith

20h 16m

1 stop

ORD14:36Chicago O'Hare Intl

$1,864

Air Canada

21 June

ORD08:45Chicago O'Hare Intl

31h 35m

1 stop

SYD07:20Sydney Kingsford Smith

7 July

SYD09:20Sydney Kingsford Smith

20h 16m

1 stop

ORD14:36Chicago O'Hare Intl

$1,873

Air Canada

21 June

ORD14:15Chicago O'Hare Intl

26h 05m

2 stops

SYD07:20Sydney Kingsford Smith

7 July

SYD09:20Sydney Kingsford Smith

20h 16m

1 stop

ORD14:36Chicago O'Hare Intl

$1,874

ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

7 Nov

ORD20:00Chicago O'Hare Intl

31h 15m

2 stops

SYD20:15Sydney Kingsford Smith

18 Nov

SYD21:45Sydney Kingsford Smith

26h 35m

1 stop

ORD07:20Chicago O'Hare Intl

$1,853

ANA

26 Aug

ORD17:45Chicago O'Hare Intl

34h 25m

1 stop

SYD19:10Sydney Kingsford Smith

1 Sept

SYD11:45Sydney Kingsford Smith

32h 00m

2 stops

ORD04:45Chicago O'Hare Intl

$1,856

ANA

13 Aug

ORD17:45Chicago O'Hare Intl

24h 40m

1 stop

SYD09:25Sydney Kingsford Smith

23 Aug

SYD20:55Sydney Kingsford Smith

34h 46m

2 stops

ORD16:41Chicago O'Hare Intl

$1,859

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Thu 30/7

09:28-12:00

3 stops35h 32m

Melbourne

Wed 12/8

13:25-06:17

2 stops31h 52m

$1,657

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Thu 30/7

09:28-12:00

3 stops35h 32m

Melbourne

Wed 12/8

13:25-06:17

2 stops31h 52m

$1,681

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 7/11

20:00-20:15

2 stops31h 15m

Sydney Kingsford Smith

Wed 18/11

21:45-07:20

1 stop26h 35m

$1,853

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 26/8

17:45-19:10

1 stop34h 25m

Sydney Kingsford Smith

Tue 1/9

11:45-04:45

2 stops32h 00m

$1,856

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 21/6

08:45-07:20

1 stop31h 35m

Sydney Kingsford Smith

Tue 7/7

09:20-14:36

1 stop20h 16m

$1,864

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 21/6

08:45-07:20

1 stop31h 35m

Sydney Kingsford Smith

Tue 7/7

09:20-14:36

1 stop20h 16m

$1,873

Fastest return journey

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 2/11

13:00-08:30

2 stops26h 30m

Sydney Kingsford Smith

Fri 20/11

10:40-16:50

2 stops23h 10m

$2,079

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 12/8

13:51-06:50

2 stops25h 59m

Sydney Kingsford Smith

Sun 23/8

09:15-18:01

2 stops23h 46m

$2,290

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 10/8

16:45-13:40

2 stops30h 25m

Adelaide

Wed 19/8

12:05-21:32

2 stops23h 57m

$2,320

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 10/8

16:45-13:40

2 stops30h 25m

Adelaide

Wed 19/8

12:05-06:19

2 stops32h 44m

$2,323

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 $160. 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 $196.

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 $1,991 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 $1,590 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 18% 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	20h 17m
Direct flights	None

The fastest flight from Chicago to Australia takes 20h 17m

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 June 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 $2,087	Free cancellation	Rating 7.5 1,046 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.