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

Philippine Airlines, Air Canada, and Air New Zealand 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 October 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.

$708 Cheap Flights from Chicago to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:26 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

32h 59m3 stops Atlanta Hartsfield-Jackson Los Angeles Nadi

13:55 - 00:53MEL Melbourne-ORD Chicago O'Hare Intl

27h 58m3 stops Nadi Los Angeles Denver Intl

$1,682Multiple Airlines

Fri, 13 Nov - Fri, 20 Nov

10:26 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

32h 59m3 stops Atlanta Hartsfield-Jackson Los Angeles Nadi

13:55 - 06:15MEL Melbourne-ORD Chicago O'Hare Intl

33h 20m2 stops Nadi Los Angeles

$1,712Multiple Airlines

Fri, 13 Nov - Fri, 20 Nov

06:59 - 07:30ORD Chicago O'Hare Intl-MEL Melbourne

31h 31m2 stops Los Angeles Manila Ninoy Aquino Intl

09:20 - 23:30MEL Melbourne-ORD Chicago O'Hare Intl

30h 10m2 stops Manila Ninoy Aquino Intl Los Angeles

$1,755Multiple Airlines

Thu, 11 Mar - Mon, 15 Mar

18:50 - 17:50ORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

17:10 - 14:30MEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,761Qatar Airways

Mon, 1 Feb - Mon, 15 Feb

19:50 - 17:50ORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

15:10 - 15:05MEL Melbourne-ORD Chicago O'Hare Intl

38h 55m1 stop Doha Hamad Intl

$1,764Qatar Airways

Mon, 22 Mar - Mon, 5 Apr

18:50 - 05:45ORD Chicago O'Hare Intl-MEL Melbourne

41h 55m1 stop Doha Hamad Intl

17:10 - 14:30MEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,769Qatar Airways

Mon, 18 Jan - Mon, 1 Feb

18:50 - 17:50ORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

17:10 - 15:30MEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,777Qatar Airways

Wed, 3 Mar - Thu, 18 Mar

18:50 - 05:45ORD Chicago O'Hare Intl-MEL Melbourne

41h 55m1 stop Doha Hamad Intl

17:10 - 14:30MEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,781Qatar Airways

Tue, 2 Feb - Wed, 24 Feb

18:55 - 08:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 10m1 stop Los Angeles

10:10 - 15:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 49m1 stop Los Angeles

$2,364Qantas Airways

Mon, 12 Oct - Mon, 19 Oct

18:55 - 08:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 10m1 stop Los Angeles

11:10 - 16:34SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 24m1 stop Los Angeles

$2,368Qantas Airways

Tue, 13 Oct - Mon, 26 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:00 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

35h 00m2 stops Los Angeles Manila Ninoy Aquino Intl

11:15 - 05:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

33h 45m2 stops Manila Ninoy Aquino Intl Los Angeles

$2,319Multiple Airlines

Mon, 5 Oct - Tue, 20 Oct

18:06 - 08:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 54m1 stop Los Angeles

07:50 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 32m2 stops Auckland Intl San Francisco

$2,324Air New Zealand

Tue, 6 Oct - Wed, 21 Oct

18:55 - 08:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 10m1 stop Los Angeles

10:10 - 15:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 49m1 stop Los Angeles

$2,368Qantas Airways

Mon, 5 Oct - Wed, 7 Oct

18:55 - 08:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 10m1 stop Los Angeles

10:10 - 15:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 49m1 stop Los Angeles

$2,368Qantas Airways

Mon, 5 Oct - Wed, 7 Oct

20:01 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 29m1 stop Los Angeles

14:15 - 06:34SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 19m2 stops Nadi Los Angeles

$2,368Multiple Airlines

Thu, 8 Oct - Wed, 21 Oct

20:01 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 29m1 stop Los Angeles

14:15 - 06:34SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 19m2 stops Nadi Los Angeles

$2,370Multiple Airlines

Thu, 8 Oct - Tue, 20 Oct

10:39 - 07:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 16m1 stop San Francisco

11:20 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 02m1 stop San Francisco

$2,375United Airlines

Mon, 5 Oct - Tue, 20 Oct

10:30 - 08:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 30m1 stop Los Angeles

11:20 - 14:50SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

19h 30m1 stop San Francisco

$2,375United Airlines

Tue, 6 Oct - Tue, 20 Oct

16:40 - 07:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 15m2 stops Los Angeles San Francisco

11:20 - 16:41SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 21m1 stop San Francisco

$2,375United Airlines

Mon, 5 Oct - Tue, 20 Oct

15:35 - 07:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 20m1 stop San Francisco

11:20 - 14:50SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

19h 30m1 stop San Francisco

$2,375United Airlines

Wed, 7 Oct - Wed, 21 Oct

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Air New Zealand flights from Chicago to Australia

Our best Air New Zealand deals on Chicago to Australia flight tickets

Air New Zealand

10 Feb

ORD10:25Chicago O'Hare Intl

28h 35m

2 stops

BNE07:00Brisbane

16 Feb

BNE11:15Brisbane

27h 28m

2 stops

ORD22:43Chicago O'Hare Intl

$1,840

Air New Zealand

3 Feb

ORD13:55Chicago O'Hare Intl

27h 40m

2 stops

SYD10:35Sydney Kingsford Smith

21 Feb

SYD11:50Sydney Kingsford Smith

29h 14m

2 stops

ORD00:04Chicago O'Hare Intl

$1,844

Air New Zealand

28 Oct

ORD15:47Chicago O'Hare Intl

27h 13m

2 stops

BNE10:00Brisbane

9 Nov

BNE11:15Brisbane

25h 22m

2 stops

ORD20:37Chicago O'Hare Intl

$1,857

Philippine Airlines flights from Chicago to Australia

Our best Philippine Airlines deals on Chicago to Australia flight tickets

Philippine Airlines

13 Nov

ORD22:45Chicago O'Hare Intl

39h 45m

1 stop

MEL07:30Melbourne

20 Nov

MEL09:20Melbourne

24h 35m

1 stop

ORD16:55Chicago O'Hare Intl

$1,840

Philippine Airlines

13 Nov

ORD22:45Chicago O'Hare Intl

39h 45m

1 stop

MEL07:30Melbourne

20 Nov

MEL09:20Melbourne

24h 35m

1 stop

ORD16:55Chicago O'Hare Intl

$1,846

Philippine Airlines

5 Mar

ORD22:45Chicago O'Hare Intl

42h 05m

1 stop

SYD09:50Sydney Kingsford Smith

16 Mar

SYD11:30Sydney Kingsford Smith

46h 25m

1 stop

ORD17:55Chicago O'Hare Intl

$1,874

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Fri 13/11

10:26-12:25

3 stops32h 59m

Melbourne

Fri 20/11

13:55-00:53

3 stops27h 58m

$1,682

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Fri 13/11

10:26-12:25

3 stops32h 59m

Melbourne

Fri 20/11

13:55-06:15

2 stops33h 20m

$1,712

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 11/3

06:59-07:30

2 stops31h 31m

Melbourne

Mon 15/3

09:20-23:30

2 stops30h 10m

$1,755

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 1/2

18:50-17:50

1 stop30h 00m

Melbourne

Mon 15/2

17:10-14:30

1 stop38h 20m

$1,761

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 22/3

19:50-17:50

1 stop30h 00m

Melbourne

Mon 5/4

15:10-15:05

1 stop38h 55m

$1,764

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 18/1

18:50-05:45

1 stop41h 55m

Melbourne

Mon 1/2

17:10-14:30

1 stop38h 20m

$1,769

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 3/3

18:50-17:50

1 stop30h 00m

Melbourne

Thu 18/3

17:10-15:30

1 stop38h 20m

$1,777

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Tue 2/2

18:50-05:45

1 stop41h 55m

Melbourne

Wed 24/2

17:10-14:30

1 stop38h 20m

$1,781

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 12/10

18:55-08:05

1 stop21h 10m

Sydney Kingsford Smith

Mon 19/10

10:10-15:59

1 stop21h 49m

$2,364

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 13/10

18:55-08:05

1 stop21h 10m

Sydney Kingsford Smith

Mon 26/10

11:10-16:34

1 stop21h 24m

$2,368

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, February 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 $1,761. If you don’t want to visit Australia in February, then you should wait until January to fly from Chicago, when ticket prices are also cheap, with an average price of $1,863.

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 $2,054 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 $1,660 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 12% 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

Best price found	$708
Fastest flight time	24h 25m
Direct flights	None

The best one-way flight to Australia from Chicago in the past 72 hours is $708. The best return flight deal from Chicago to Australia found on momondo in the last 72 hours is $1,682.

The fastest flight from Chicago to Australia takes 24h 25m

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 October 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 $2,278	Free cancellation	Rating 7.5 1,101 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.