What is the cheapest airline that flies from Chicago O'Hare Intl to Australia?

Delta and Qantas Airways are the most popular carriers operating from Chicago O'Hare Intl to Australia

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Australia?

There is 1 operator available for flights from Chicago O'Hare Intl Airport to Australia as of September 2026.

How old do you have to be to fly from Chicago O'Hare Intl Airport to Australia?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents you'll need for your trip to Australia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Australia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$725 Cheap Flights from Chicago O'Hare Intl Airport to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

22:45 - 07:30ORD Chicago O'Hare Intl-MEL Melbourne

39h 45m1 stop Manila Ninoy Aquino Intl

09:20 - 16:55MEL Melbourne-ORD Chicago O'Hare Intl

24h 35m1 stop Manila Ninoy Aquino Intl

$1,643Philippine Airlines

Mon, 22 Feb - Mon, 8 Mar

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

31h 31m2 stops Los Angeles Manila Ninoy Aquino Intl

09:20 - 05:00MEL Melbourne-ORD Chicago O'Hare Intl

35h 40m2 stops Manila Ninoy Aquino Intl Los Angeles

$1,715Multiple Airlines

Thu, 11 Mar - Tue, 23 Mar

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

30h 00m1 stop Doha Hamad Intl

16:10 - 15:05MEL Melbourne-ORD Chicago O'Hare Intl

37h 55m1 stop Doha Hamad Intl

$1,725Qatar Airways

Mon, 22 Mar - Mon, 5 Apr

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

$1,729Multiple Airlines

Wed, 10 Feb - Mon, 22 Feb

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

30h 00m1 stop Doha Hamad Intl

16:10 - 15:30MEL Melbourne-ORD Chicago O'Hare Intl

39h 20m1 stop Doha Hamad Intl

$1,736Qatar Airways

Thu, 11 Mar - Tue, 23 Mar

07:29 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 06m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 22:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

29h 05m2 stops Auckland Intl Los Angeles

$1,736Air New Zealand

Mon, 2 Nov - Mon, 16 Nov

09:15 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 20m2 stops Houston George Bush Intcntl Auckland Intl

11:50 - 21:46SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 56m2 stops Auckland Intl Los Angeles

$1,736Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

14:23 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 12m2 stops Houston George Bush Intcntl Auckland Intl

11:50 - 21:46SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 56m2 stops Auckland Intl Los Angeles

$1,736Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

15:50 - 06:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 05m1 stop Dallas/Fort Worth

11:20 - 15:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 39m1 stop Los Angeles

$2,235Qantas Airways

Fri, 5 Mar - Mon, 15 Mar

18:45 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 15m1 stop Los Angeles

11:20 - 23:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

29h 39m1 stop Los Angeles

$2,237Qantas Airways

Tue, 29 Dec - Sat, 23 Jan

Cheap last-minute flights

Enter your travel dates to find the best prices.

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

35h 00m2 stops Los Angeles Manila Ninoy Aquino Intl

11:30 - 05:02SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

34h 32m2 stops Manila Ninoy Aquino Intl Los Angeles

$1,861Multiple Airlines

Sun, 27 Sep - Mon, 2 Nov

11:15 - 13:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

35h 10m3 stops Orlando Los Angeles Nadi

13:15 - 00:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 30m3 stops Nadi Los Angeles Dallas/Fort Worth

$2,034Multiple Airlines

Fri, 25 Sep - Fri, 2 Oct

11:15 - 13:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

35h 10m3 stops Orlando Los Angeles Nadi

13:15 - 00:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 30m3 stops Nadi Los Angeles Dallas/Fort Worth

$2,034Multiple Airlines

Fri, 25 Sep - Fri, 2 Oct

08:23 - 06:30ORD Chicago O'Hare Intl-MEL Melbourne

31h 07m2 stops Los Angeles Manila Ninoy Aquino Intl

09:00 - 00:30MEL Melbourne-ORD Chicago O'Hare Intl

31h 30m2 stops Manila Ninoy Aquino Intl Los Angeles

$2,165Multiple Airlines

Fri, 25 Sep - Sun, 4 Oct

18:06 - 07:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 54m1 stop Los Angeles

14:05 - 20:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 32m2 stops Auckland Intl Los Angeles

$2,175Air New Zealand

Sun, 27 Sep - Mon, 2 Nov

17:45 - 19:10ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 25m1 stop Tokyo Haneda

21:45 - 08:40SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 55m1 stop Tokyo Haneda

$2,220ANA

Mon, 28 Sep - Wed, 14 Oct

17:45 - 19:10ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 25m1 stop Tokyo Haneda

12:45 - 04:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 00m2 stops Tokyo Haneda Los Angeles

$2,227ANA

Mon, 28 Sep - Wed, 14 Oct

06:55 - 06:30ORD Chicago O'Hare Intl-MEL Melbourne

32h 35m2 stops Los Angeles Manila Ninoy Aquino Intl

09:00 - 00:30MEL Melbourne-ORD Chicago O'Hare Intl

31h 30m2 stops Manila Ninoy Aquino Intl Los Angeles

$2,305Multiple Airlines

Fri, 25 Sep - Sun, 4 Oct

19:03 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 02m1 stop Los Angeles

09:10 - 14:30SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 20m1 stop Los Angeles

$3,164Qantas Airways

Thu, 24 Sep - Sat, 26 Sep

17:50 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 15m1 stop Los Angeles

09:10 - 15:53SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 43m1 stop Los Angeles

$3,169Qantas Airways

Thu, 24 Sep - Sat, 26 Sep

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Air New Zealand flights from Chicago O'Hare Intl Airport to Australia

Our best Air New Zealand deals on Chicago O'Hare Intl Airport to Australia flight tickets

Air New Zealand

1 Feb

ORD14:23Chicago O'Hare Intl

25h 12m

2 stops

SYD08:35Sydney Kingsford Smith

3 Mar

SYD11:50Sydney Kingsford Smith

26h 56m

2 stops

ORD21:46Chicago O'Hare Intl

$1,736

Air New Zealand

8 Nov

ORD09:21Chicago O'Hare Intl

30h 14m

2 stops

SYD08:35Sydney Kingsford Smith

18 Nov

SYD11:50Sydney Kingsford Smith

24h 06m

2 stops

ORD18:56Chicago O'Hare Intl

$1,742

Air New Zealand

14 Nov

ORD19:55Chicago O'Hare Intl

43h 40m

2 stops

SYD08:35Sydney Kingsford Smith

25 Nov

SYD09:55Sydney Kingsford Smith

30h 32m

2 stops

ORD23:27Chicago O'Hare Intl

$1,749

ANA flights from Chicago O'Hare Intl Airport to Australia

Our best ANA deals on Chicago O'Hare Intl Airport to Australia flight tickets

ANA

10 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

17 Nov

SYD12:25Sydney Kingsford Smith

33h 55m

2 stops

ORD05:20Chicago O'Hare Intl

$1,771

ANA

8 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

24 Nov

SYD21:45Sydney Kingsford Smith

33h 05m

1 stop

ORD13:50Chicago O'Hare Intl

$1,792

ANA

8 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

24 Nov

SYD12:25Sydney Kingsford Smith

35h 55m

1 stop

ORD07:20Chicago O'Hare Intl

$1,794

momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 22/2

22:45-07:30

1 stop39h 45m

Melbourne

Mon 8/3

09:20-16:55

1 stop24h 35m

$1,643

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 11/3

06:59-07:30

2 stops31h 31m

Melbourne

Tue 23/3

09:20-05:00

2 stops35h 40m

$1,715

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

16:10-15:05

1 stop37h 55m

$1,725

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 10/2

18:50-17:50

1 stop30h 00m

Melbourne

Mon 22/2

17:10-14:30

1 stop38h 20m

$1,729

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 11/3

18:50-17:50

1 stop30h 00m

Melbourne

Tue 23/3

16:10-15:30

1 stop39h 20m

$1,736

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 2/11

07:29-10:35

2 stops34h 06m

Sydney Kingsford Smith

Mon 16/11

09:55-22:00

2 stops29h 05m

$1,736

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

09:15-08:35

2 stops30h 20m

Sydney Kingsford Smith

Wed 3/3

11:50-21:46

2 stops26h 56m

$1,736

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

14:23-08:35

2 stops25h 12m

Sydney Kingsford Smith

Wed 3/3

11:50-21:46

2 stops26h 56m

$1,736

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 5/3

15:50-06:55

1 stop22h 05m

Sydney Kingsford Smith

Mon 15/3

11:20-15:59

1 stop20h 39m

$2,235

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 29/12

18:45-09:00

1 stop21h 15m

Sydney Kingsford Smith

Sat 23/1

11:20-23:59

1 stop29h 39m

$2,237

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 O'Hare Intl Airport 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 O'Hare Intl Airport to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,739. If you don’t want to visit Australia in February, then you should wait until January to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $1,740.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Australia?

You are more likely to see cheaper flights to Australia from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $2,002 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 O'Hare Intl Airport for as low as $1,545 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Australia flights?

You could potentially save up to 14% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Australia flight.

Cheap Chicago O'Hare Intl Airport to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Australia

Best price found	$725
Fastest flight time	21h 37m
Direct flights	None

The best one-way flight to Australia from Chicago O'Hare Intl Airport in the past 72 hours is $725. The best return flight deal from Chicago O'Hare Intl Airport to Australia found on momondo in the last 72 hours is $1,643.

The fastest flight from Chicago O'Hare Intl Airport to Australia takes 21h 37m

There are no direct flights from Chicago O'Hare Intl Airport to Australia. There are no popular flight routes from Chicago O'Hare Intl Airport to Australia.

Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Australia

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Australia?
Prices for flights from Chicago O'Hare Intl Airport to Australia are updated daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Australia?
There is 1 operator available for flights from Chicago O'Hare Intl Airport to Australia as of September 2026.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Australia?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents you'll need for your trip to Australia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Australia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Chicago O'Hare Intl Airport to Australia

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Australia with momondo

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $2,224	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?

It is quick and easy to find Chicago to Australia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Australia that suits you.

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

momondo does allow users to show only those flights to Australia from Chicago which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Chicago to Australia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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.