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Cheap flights from Chicago O'Hare Intl Airport to Australia from $531

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Australia departing on 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Australia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
6:40 pm - 9:00 am
ORD
-
SYD
21h 20m1 stop
Qantas Airways Logo
7:05 am - 2:57 pm
SYD
-
ORD
24h 52m2 stops
$901Qantas Airways
mar., ene. 20 - mié., ene. 28
Air Canada Logo
3:35 pm - 9:35 am
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 am - 2:41 pm
SYD
-
ORD
20h 21m1 stop
$906Air Canada
dom., feb. 1 - dom., feb. 15
Qantas Airways Logo
2:15 pm - 9:10 am
ORD
-
SYD
49h 55m2 stops
Qantas Airways Logo
11:20 am - 2:57 pm
SYD
-
ORD
20h 37m1 stop
$908Qantas Airways
sáb., ene. 24 - sáb., ene. 31
Air Canada Logo
3:35 pm - 9:35 am
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 am - 8:10 pm
SYD
-
ORD
25h 50m2 stops
$909Air Canada
dom., feb. 1 - dom., feb. 15
Air Canada Logo
3:35 pm - 9:35 am
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 am - 2:41 pm
SYD
-
ORD
20h 21m1 stop
$944Air Canada
dom., ene. 25 - dom., feb. 8
Multiple Airlines Logo
8:45 am - 8:45 am
ORD
-
BNE
32h 00m2 stops
Multiple Airlines Logo
6:05 am - 2:41 pm
BNE
-
ORD
24h 36m2 stops
$979Multiple Airlines
mar., feb. 10 - dom., feb. 22
Multiple Airlines Logo
3:35 pm - 2:15 pm
ORD
-
MEL
29h 40m2 stops
Multiple Airlines Logo
8:30 pm - 2:43 pm
MEL
-
ORD
33h 13m2 stops
$989Multiple Airlines
mié., ene. 28 - lun., abr. 27
United Airlines Logo
2:40 pm - 9:30 am
ORD
-
ADL
26h 20m1 stop
United Airlines Logo
2:55 pm - 9:32 pm
ADL
-
ORD
23h 07m1 stop
$1,155United Airlines
lun., ene. 19 - lun., feb. 2
American Airlines Logo
4:49 pm - 2:10 pm
ORD
-
CBR
29h 21m2 stops
American Airlines Logo
5:45 pm - 5:25 am
CBR
-
ORD
27h 40m2 stops
$1,316American Airlines
mar., mar. 10 - mar., mar. 17
United Airlines Logo
6:30 pm - 9:10 pm
ORD
-
HBA
33h 40m2 stops
United Airlines Logo
6:20 am - 2:50 pm
HBA
-
ORD
25h 30m2 stops
$1,430United Airlines
lun., ene. 19 - mar., ene. 27

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
Jan 20
ORD6:40 pmChicago O'Hare Intl
21h 20m
1 stop
SYD9:00 amSydney Kingsford Smith
Jan 28
SYD7:05 amSydney Kingsford Smith
24h 52m
2 stops
ORD2:57 pmChicago O'Hare Intl
$901
Find similar
Qantas Airways
Jan 24
ORD2:15 pmChicago O'Hare Intl
49h 55m
2 stops
SYD9:10 amSydney Kingsford Smith
Jan 31
SYD11:20 amSydney Kingsford Smith
20h 37m
1 stop
ORD2:57 pmChicago O'Hare Intl
$908
Find similar
Qantas Airways
Jan 25
ORD6:40 pmChicago O'Hare Intl
43h 55m
2 stops
SYD7:35 amSydney Kingsford Smith
Feb 8
SYD11:20 amSydney Kingsford Smith
20h 37m
1 stop
ORD2:57 pmChicago O'Hare Intl
$946
Find similar

Air Canada flights from Chicago O'Hare Intl Airport to Australia

Our best Air Canada deals on Chicago O'Hare Intl Airport to Australia flight tickets
Air Canada
Feb 1
ORD3:35 pmChicago O'Hare Intl
25h 00m
1 stop
SYD9:35 amSydney Kingsford Smith
Feb 15
SYD11:20 amSydney Kingsford Smith
20h 21m
1 stop
ORD2:41 pmChicago O'Hare Intl
$906
Find similar
Air Canada
Feb 1
ORD3:35 pmChicago O'Hare Intl
25h 00m
1 stop
SYD9:35 amSydney Kingsford Smith
Feb 15
SYD11:20 amSydney Kingsford Smith
25h 50m
2 stops
ORD8:10 pmChicago O'Hare Intl
$909
Find similar
Air Canada
Jan 25
ORD3:35 pmChicago O'Hare Intl
25h 00m
1 stop
SYD9:35 amSydney Kingsford Smith
Feb 8
SYD11:20 amSydney Kingsford Smith
20h 21m
1 stop
ORD2:41 pmChicago O'Hare Intl
$944
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated diciembre 11, 2025.
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

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 1/20

6:40 pm-9:00 am

1 stop21h 20m

Sydney Kingsford Smith

mié. 1/28

7:05 am-2:57 pm

2 stops24h 52m

$901

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 2/1

3:35 pm-9:35 am

1 stop25h 00m

Sydney Kingsford Smith

dom. 2/15

11:20 am-2:41 pm

1 stop20h 21m

$906

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

sáb. 1/24

2:15 pm-9:10 am

2 stops49h 55m

Sydney Kingsford Smith

sáb. 1/31

11:20 am-2:57 pm

1 stop20h 37m

$908

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 2/1

3:35 pm-9:35 am

1 stop25h 00m

Sydney Kingsford Smith

dom. 2/15

11:20 am-8:10 pm

2 stops25h 50m

$909

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 1/25

3:35 pm-9:35 am

1 stop25h 00m

Sydney Kingsford Smith

dom. 2/8

11:20 am-2:41 pm

1 stop20h 21m

$944

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

mar. 2/10

8:45 am-8:45 am

2 stops32h 00m

Brisbane

dom. 2/22

6:05 am-2:41 pm

2 stops24h 36m

$979

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

mié. 1/28

3:35 pm-2:15 pm

2 stops29h 40m

Melbourne

lun. 4/27

8:30 pm-2:43 pm

2 stops33h 13m

$989

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

lun. 1/19

2:40 pm-9:30 am

1 stop26h 20m

Adelaide

lun. 2/2

2:55 pm-9:32 pm

1 stop23h 07m

$1,155

ChicagoCanberra

ORD - CBR

ORDCBR

Chicago O'Hare Intl

mar. 3/10

4:49 pm-2:10 pm

2 stops29h 21m

Canberra

mar. 3/17

5:45 pm-5:25 am

2 stops27h 40m

$1,316

ChicagoHobart

ORD - HBA

ORDHBA

Chicago O'Hare Intl

lun. 1/19

6:30 pm-9:10 pm

2 stops33h 40m

Hobart

mar. 1/27

6:20 am-2:50 pm

2 stops25h 30m

$1,430

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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

What is the cheapest month to fly to Australia?

The month of May is, on average, the cheapest month to fly to Australia from Chicago O'Hare Intl Airport, with most prices found around $849. If you aren’t able to travel during the month of May, then book flights to Australia from Chicago O'Hare Intl Airport during March instead. Flights to Australia in March, while not as cheap as those in May, still average around $851.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from Chicago O'Hare Intl Airport to Australia is on a Saturday. Travelers who choose to depart for Australia on a Saturday will often find tickets for as low as $935. On the other hand, Thursday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,415.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from Chicago O'Hare Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,185 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,417 on average. Flights to Australia from Chicago O'Hare Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $1,077 when searching weeks out. 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 $851 on momondo.

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

You could potentially save up to 33% 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

Fastest flight time

21h 20m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Australia takes 21h 20m
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

  • 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 were last updated today.

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

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 license 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 AirwaysPriceFrom $675Free CancellationRating
7.5
947 reviews
Search Qantas Airways flights
ANAPriceFrom $679Free CancellationRating
8.4
1,021 reviews
Search ANA flights
American AirlinesPriceFrom $680Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
Fiji AirwaysPriceFrom $772Free CancellationRating
8.1
210 reviews
Search Fiji Airways flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Air CanadaPriceFrom $872Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
DeltaPriceFrom $935Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Qatar AirwaysPriceFrom $1,229Free CancellationRating
7.4
3,677 reviews
Search Qatar Airways flights
Air New ZealandPriceFrom $1,264Free CancellationRating
8.0
552 reviews
Search Air New Zealand flights
Cathay PacificPriceFrom $1,418Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Australia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Australia. Millions of users trust and use momondo every year so you are in good hands.

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 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?

Price alerts on flights to Australia from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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