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

Air Canada, Delta, and United 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 July 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.

$857 Cheap Flights from Chicago to Australia in 2026

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.

15:20 - 15:35

ORD

MEL

31h 15m

2 stops

22:45 - 16:51

MEL

ORD

35h 06m

1 stop

$1,508Qantas Airways

Wed, 20 Jan - Wed, 10 Feb

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

10:15 - 14:36

BNE

ORD

19h 21m

1 stop

$1,547Air Canada

Sun, 9 Aug - Tue, 25 Aug

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

10:00 - 14:43

BNE

ORD

19h 43m

1 stop

$1,548Air Canada

Sun, 20 Sep - Sun, 4 Oct

17:16 - 06:45

ORD

MEL

22h 29m

1 stop

11:30 - 23:30

MEL

ORD

27h 00m

1 stop

$1,584American Airlines

Mon, 10 Aug - Sun, 23 Aug

17:16 - 06:45

ORD

MEL

22h 29m

1 stop

11:30 - 23:30

MEL

ORD

27h 00m

1 stop

$1,585American Airlines

Mon, 10 Aug - Sun, 23 Aug

21:20 - 06:45

ORD

MEL

42h 25m

1 stop

13:30 - 05:59

MEL

ORD

31h 29m

2 stops

$1,595Multiple Airlines

Sat, 29 Aug - Sun, 6 Sep

07:25 - 12:05

MDW

MEL

37h 40m

3 stops

13:30 - 10:58

MEL

MDW

36h 28m

3 stops

$1,628Multiple Airlines

Sat, 12 Sep - Sun, 27 Sep

10:58 - 08:50

MDW

MEL

29h 52m

2 stops

11:00 - 18:05

MEL

MDW

23h 05m

2 stops

$1,703Delta

Sun, 11 Oct - Wed, 21 Oct

17:20 - 08:30

ORD

SYD

22h 10m

1 stop

10:40 - 13:47

SYD

ORD

20h 07m

1 stop

$1,747Delta

Mon, 2 Nov - Fri, 13 Nov

21:35 - 07:00

ORD

SYD

40h 25m

1 stop

09:15 - 12:33

SYD

ORD

20h 18m

1 stop

$1,757United Airlines

Sat, 7 Nov - Fri, 13 Nov

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Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

11 Oct

MDW10:58Chicago Midway

29h 52m

2 stops

MEL08:50Melbourne

21 Oct

MEL11:00Melbourne

23h 05m

2 stops

MDW18:05Chicago Midway

$1,703

Delta

4 Aug

ORD19:44Chicago O'Hare Intl

45h 06m

2 stops

MEL07:50Melbourne

14 Oct

MEL11:00Melbourne

23h 08m

2 stops

ORD18:08Chicago O'Hare Intl

$1,727

Delta

2 Nov

ORD17:20Chicago O'Hare Intl

22h 10m

1 stop

SYD08:30Sydney Kingsford Smith

13 Nov

SYD10:40Sydney Kingsford Smith

20h 07m

1 stop

ORD13:47Chicago O'Hare Intl

$1,747

ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

28 Sept

ORD17:45Chicago O'Hare Intl

34h 25m

1 stop

SYD19:10Sydney Kingsford Smith

14 Oct

SYD12:45Sydney Kingsford Smith

35h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,821

ANA

4 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

12 Nov

SYD12:25Sydney Kingsford Smith

33h 55m

2 stops

ORD05:20Chicago O'Hare Intl

$1,829

ANA

1 Nov

ORD06:00Chicago O'Hare Intl

45h 15m

2 stops

SYD20:15Sydney Kingsford Smith

15 Nov

SYD12:25Sydney Kingsford Smith

33h 55m

2 stops

ORD05:20Chicago O'Hare Intl

$1,844

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 20/1

15:20-15:35

2 stops31h 15m

Melbourne

Wed 10/2

22:45-16:51

1 stop35h 06m

$1,508

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 9/8

15:40-07:05

1 stop24h 25m

Brisbane

Tue 25/8

10:15-14:36

1 stop19h 21m

$1,547

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 20/9

15:40-07:05

1 stop24h 25m

Brisbane

Sun 4/10

10:00-14:43

1 stop19h 43m

$1,548

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 10/8

17:16-06:45

1 stop22h 29m

Melbourne

Sun 23/8

11:30-23:30

1 stop27h 00m

$1,584

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 10/8

17:16-06:45

1 stop22h 29m

Melbourne

Sun 23/8

11:30-23:30

1 stop27h 00m

$1,585

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Sat 29/8

21:20-06:45

1 stop42h 25m

Melbourne

Sun 6/9

13:30-05:59

2 stops31h 29m

$1,595

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Sat 12/9

07:25-12:05

3 stops37h 40m

Melbourne

Sun 27/9

13:30-10:58

3 stops36h 28m

$1,628

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Sun 11/10

10:58-08:50

2 stops29h 52m

Melbourne

Wed 21/10

11:00-18:05

2 stops23h 05m

$1,703

Fastest return journey

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/11

17:20-08:30

1 stop22h 10m

Sydney Kingsford Smith

Fri 13/11

10:40-13:47

1 stop20h 07m

$1,747

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 7/11

21:35-07:00

1 stop40h 25m

Sydney Kingsford Smith

Fri 13/11

09:15-12:33

1 stop20h 18m

$1,757

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 $1,806. If you don’t want to visit Australia in February, then you should wait until June to fly from Chicago, when ticket prices are also cheap, with an average price of $1,877.

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 $2,053 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 $1,695 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 7% 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 57m
Direct flights	None

The fastest flight from Chicago to Australia takes 20h 57m

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 July 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 $2,103	Free cancellation	Rating 7.5 1,067 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.