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

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

$831 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.

08:59 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

34h 26m3 stops Dallas/Fort Worth Los Angeles Nadi

13:35 - 05:01MEL Melbourne-ORD Chicago O'Hare Intl

32h 26m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

$1,690Multiple Airlines

Fri, 4 Dec - Mon, 7 Dec

05:40 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

34h 50m1 stop Los Angeles

13:35 - 07:05MEL Melbourne-ORD Chicago O'Hare Intl

34h 30m2 stops Nadi Los Angeles

$1,703Multiple Airlines

Wed, 24 Feb - Sat, 27 Feb

05:40 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

34h 50m1 stop Los Angeles

13:45 - 07:05MEL Melbourne-ORD Chicago O'Hare Intl

33h 20m2 stops Nadi Los Angeles

$1,709Multiple Airlines

Sat, 27 Feb - Tue, 16 Mar

05:40 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

37h 45m2 stops Los Angeles Nadi

13:35 - 00:26MEL Melbourne-ORD Chicago O'Hare Intl

27h 51m3 stops Nadi Los Angeles Denver Intl

$1,721Multiple Airlines

Wed, 24 Feb - Sat, 27 Feb

05:40 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

34h 50m1 stop Los Angeles

13:55 - 07:05MEL Melbourne-ORD Chicago O'Hare Intl

34h 10m2 stops Nadi Los Angeles

$1,722Multiple Airlines

Sun, 14 Feb - Sun, 21 Feb

07:00 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

33h 30m2 stops Denver Intl Los Angeles

06:45 - 00:54MEL Melbourne-ORD Chicago O'Hare Intl

35h 09m3 stops Auckland Intl Los Angeles Denver Intl

$1,725Multiple Airlines

Wed, 2 Dec - Sat, 5 Dec

05:40 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

34h 50m1 stop Los Angeles

13:55 - 07:05MEL Melbourne-ORD Chicago O'Hare Intl

34h 10m2 stops Nadi Los Angeles

$1,729Multiple Airlines

Thu, 11 Feb - Fri, 26 Feb

06:21 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

37h 04m3 stops Denver Intl Los Angeles Nadi

13:35 - 00:26MEL Melbourne-ORD Chicago O'Hare Intl

27h 51m3 stops Nadi Los Angeles Denver Intl

$1,737Multiple Airlines

Wed, 24 Feb - Sat, 27 Feb

21:05 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

40h 20m1 stop Los Angeles

19:15 - 16:15SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

38h 00m2 stops Auckland Intl Los Angeles

$1,949Qantas Airways

Fri, 4 Dec - Fri, 11 Dec

16:54 - 06:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 01m1 stop Dallas/Fort Worth

14:05 - 18:29SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 24m1 stop Dallas/Fort Worth

$2,108Qantas Airways

Sun, 14 Feb - Sun, 21 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:29 - 09:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 21m2 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

$1,903Multiple Airlines

Sun, 8 Nov - Wed, 18 Nov

06:29 - 09:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 21m2 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

$1,904Multiple Airlines

Mon, 9 Nov - Mon, 16 Nov

21:35 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 00m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 01m2 stops Auckland Intl Los Angeles

$1,904Air New Zealand

Sun, 8 Nov - Wed, 18 Nov

21:35 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 00m2 stops Houston George Bush Intcntl Auckland Intl

11:55 - 21:46SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 51m2 stops Auckland Intl Los Angeles

$1,904Air New Zealand

Sun, 8 Nov - Wed, 28 Apr

06:29 - 09:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 21m2 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

$1,904Multiple Airlines

Sun, 8 Nov - Wed, 18 Nov

21:04 - 07:30ORD Chicago O'Hare Intl-MEL Melbourne

41h 26m2 stops Los Angeles Manila Ninoy Aquino Intl

09:20 - 05:02MEL Melbourne-ORD Chicago O'Hare Intl

36h 42m2 stops Manila Ninoy Aquino Intl Los Angeles

$1,904Multiple Airlines

Tue, 10 Nov - Tue, 17 Nov

06:30 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 55m2 stops Denver Intl Ontario

06:00 - 06:14SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 14m3 stops Melbourne Nadi Los Angeles

$1,921Multiple Airlines

Sun, 8 Nov - Mon, 23 Nov

05:30 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 05m2 stops Houston George Bush Intcntl Auckland Intl

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

23h 32m2 stops Auckland Intl Los Angeles

$1,959Air New Zealand

Sun, 8 Nov - Wed, 18 Nov

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

21h 15m1 stop Los Angeles

11:10 - 16:42SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 32m1 stop Los Angeles

$2,363Qantas Airways

Sun, 8 Nov - Mon, 23 Nov

08:42 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 18m1 stop Los Angeles

11:10 - 16:57SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 47m1 stop Los Angeles

$2,419Qantas Airways

Sun, 8 Nov - Wed, 18 Nov

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Qantas Airways flights from Chicago O'Hare Intl Airport to Australia

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

Qantas Airways

4 Dec

ORD21:05Chicago O'Hare Intl

40h 20m

1 stop

SYD06:25Sydney Kingsford Smith

11 Dec

SYD19:15Sydney Kingsford Smith

38h 00m

2 stops

ORD16:15Chicago O'Hare Intl

$1,949

Qantas Airways

8 Nov

ORD18:45Chicago O'Hare Intl

21h 15m

1 stop

SYD09:00Sydney Kingsford Smith

23 Nov

SYD11:10Sydney Kingsford Smith

22h 32m

1 stop

ORD16:42Chicago O'Hare Intl

$2,363

Qantas Airways

17 Nov

ORD15:25Chicago O'Hare Intl

24h 35m

1 stop

SYD09:00Sydney Kingsford Smith

30 Nov

SYD11:10Sydney Kingsford Smith

23h 01m

1 stop

ORD17:11Chicago O'Hare Intl

$2,381

American Airlines flights from Chicago O'Hare Intl Airport to Australia

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

American Airlines

1 Feb

ORD15:29Chicago O'Hare Intl

22h 21m

1 stop

BNE05:50Brisbane

14 Feb

BNE13:10Brisbane

19h 48m

1 stop

ORD16:58Chicago O'Hare Intl

$1,855

American Airlines

1 Feb

ORD15:06Chicago O'Hare Intl

22h 44m

2 stops

BNE05:50Brisbane

14 Feb

BNE13:10Brisbane

22h 44m

2 stops

ORD19:54Chicago O'Hare Intl

$1,860

American Airlines

8 Apr

ORD17:25Chicago O'Hare Intl

22h 40m

2 stops

SYD07:05Sydney Kingsford Smith

27 Apr

SYD12:00Sydney Kingsford Smith

22h 55m

1 stop

ORD19:55Chicago O'Hare Intl

$1,991

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

Fri 4/12

08:59-12:25

3 stops34h 26m

Melbourne

Mon 7/12

13:35-05:01

3 stops32h 26m

$1,690

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 24/2

05:40-09:30

1 stop34h 50m

Melbourne

Sat 27/2

13:35-07:05

2 stops34h 30m

$1,703

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Sat 27/2

05:40-09:30

1 stop34h 50m

Melbourne

Tue 16/3

13:45-07:05

2 stops33h 20m

$1,709

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 24/2

05:40-12:25

2 stops37h 45m

Melbourne

Sat 27/2

13:35-00:26

3 stops27h 51m

$1,721

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Sun 14/2

05:40-09:30

1 stop34h 50m

Melbourne

Sun 21/2

13:55-07:05

2 stops34h 10m

$1,722

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 2/12

07:00-09:30

2 stops33h 30m

Melbourne

Sat 5/12

06:45-00:54

3 stops35h 09m

$1,725

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 11/2

05:40-09:30

1 stop34h 50m

Melbourne

Fri 26/2

13:55-07:05

2 stops34h 10m

$1,729

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 24/2

06:21-12:25

3 stops37h 04m

Melbourne

Sat 27/2

13:35-00:26

3 stops27h 51m

$1,737

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 4/12

21:05-06:25

1 stop40h 20m

Sydney Kingsford Smith

Fri 11/12

19:15-16:15

2 stops38h 00m

$1,949

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sun 14/2

16:54-06:55

1 stop21h 01m

Sydney Kingsford Smith

Sun 21/2

14:05-18:29

1 stop21h 24m

$2,108

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, January 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 $1,689. If you don’t want to visit Australia in January, then you should wait until June to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $1,914.

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 $2,184 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 $1,574 on momondo.

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

You could potentially save up to 12% 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	$831
Fastest flight time	23h 29m
Direct flights	None

The best one-way flight to Australia from Chicago O'Hare Intl Airport in the past 72 hours is $831. The best return flight deal from Chicago O'Hare Intl Airport to Australia found on momondo in the last 72 hours is $1,690.

The fastest flight from Chicago O'Hare Intl Airport to Australia takes 23h 29m

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 November 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 $2,303	Free cancellation	Rating 7.5 1,123 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.