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Cheap flights from Chicago O'Hare Intl Airport to Australia from $775

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 6/5. 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 return flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
15:10 - 09:00
ORD
-
SYD
24h 50m1 stop
Qantas Airways Logo
07:05 - 16:38
SYD
-
ORD
26h 33m2 stops
$1,331Qantas Airways
Wed, 11 Feb - Wed, 4 Mar
Qantas Airways Logo
14:15 - 09:00
ORD
-
SYD
25h 45m1 stop
Qantas Airways Logo
07:05 - 16:38
SYD
-
ORD
26h 33m2 stops
$1,353Qantas Airways
Mon, 9 Feb - Tue, 17 Feb
Qantas Airways Logo
14:15 - 09:10
ORD
-
SYD
49h 55m2 stops
Qantas Airways Logo
11:20 - 14:57
SYD
-
ORD
20h 37m1 stop
$1,364Qantas Airways
Sat, 24 Jan - Sat, 31 Jan
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,418Air Canada
Sun, 25 Jan - Sun, 8 Feb
Qantas Airways Logo
18:40 - 07:35
ORD
-
SYD
43h 55m2 stops
Qantas Airways Logo
11:20 - 14:57
SYD
-
ORD
20h 37m1 stop
$1,421Qantas Airways
Sun, 25 Jan - Sun, 8 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 20:10
SYD
-
ORD
25h 50m2 stops
$1,424Air Canada
Sun, 25 Jan - Sun, 8 Feb
Multiple Airlines Logo
08:45 - 08:45
ORD
-
BNE
32h 00m2 stops
Multiple Airlines Logo
06:05 - 14:41
BNE
-
ORD
24h 36m2 stops
$1,470Multiple Airlines
Tue, 10 Feb - Sun, 22 Feb
United Airlines Logo
13:55 - 09:30
ORD
-
ADL
27h 05m2 stops
United Airlines Logo
14:55 - 20:05
ADL
-
ORD
21h 40m1 stop
$1,735United Airlines
Mon, 19 Jan - Mon, 2 Feb
Multiple Airlines Logo
21:14 - 14:10
ORD
-
AVV
47h 56m3 stops
Multiple Airlines Logo
20:55 - 15:10
AVV
-
ORD
59h 15m3 stops
$1,736Multiple Airlines
Sat, 21 Feb - Sat, 28 Feb
United Airlines Logo
18:30 - 21:10
ORD
-
HBA
33h 40m2 stops
United Airlines Logo
06:20 - 14:50
HBA
-
ORD
25h 30m2 stops
$2,148United Airlines
Mon, 19 Jan - Wed, 28 Jan

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
25 Jan
ORD15:35Chicago O'Hare Intl
25h 00m
1 stop
SYD09:35Sydney Kingsford Smith
8 Feb
SYD11:20Sydney Kingsford Smith
20h 21m
1 stop
ORD14:41Chicago O'Hare Intl
$1,418
Find similar
Air Canada
25 Jan
ORD15:35Chicago O'Hare Intl
25h 00m
1 stop
SYD09:35Sydney Kingsford Smith
8 Feb
SYD11:20Sydney Kingsford Smith
25h 50m
2 stops
ORD20:10Chicago O'Hare Intl
$1,424
Find similar
Air Canada
25 Jan
ORD15:35Chicago O'Hare Intl
25h 00m
1 stop
SYD09:35Sydney Kingsford Smith
8 Feb
SYD11:20Sydney Kingsford Smith
20h 21m
1 stop
ORD14:41Chicago O'Hare Intl
$1,428
Find similar

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
9 Feb
ORD14:15Chicago O'Hare Intl
25h 45m
1 stop
SYD09:00Sydney Kingsford Smith
17 Feb
SYD07:05Sydney Kingsford Smith
26h 33m
2 stops
ORD16:38Chicago O'Hare Intl
$1,353
Find similar
Qantas Airways
24 Jan
ORD14:15Chicago O'Hare Intl
49h 55m
2 stops
SYD09:10Sydney Kingsford Smith
31 Jan
SYD11:20Sydney Kingsford Smith
20h 37m
1 stop
ORD14:57Chicago O'Hare Intl
$1,364
Find similar
Qantas Airways
25 Jan
ORD18:40Chicago O'Hare Intl
43h 55m
2 stops
SYD07:35Sydney Kingsford Smith
8 Feb
SYD11:20Sydney Kingsford Smith
20h 37m
1 stop
ORD14:57Chicago O'Hare Intl
$1,421
Find similar

momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 12 December 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

Wed 11/2

15:10-09:00

1 stop24h 50m

Sydney Kingsford Smith

Wed 4/3

07:05-16:38

2 stops26h 33m

$1,331

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 9/2

14:15-09:00

1 stop25h 45m

Sydney Kingsford Smith

Tue 17/2

07:05-16:38

2 stops26h 33m

$1,353

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 24/1

14:15-09:10

2 stops49h 55m

Sydney Kingsford Smith

Sat 31/1

11:20-14:57

1 stop20h 37m

$1,364

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 25/1

15:35-09:35

1 stop25h 00m

Sydney Kingsford Smith

Sun 8/2

11:20-14:41

1 stop20h 21m

$1,418

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 25/1

18:40-07:35

2 stops43h 55m

Sydney Kingsford Smith

Sun 8/2

11:20-14:57

1 stop20h 37m

$1,421

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 25/1

15:35-09:35

1 stop25h 00m

Sydney Kingsford Smith

Sun 8/2

11:20-20:10

2 stops25h 50m

$1,424

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 10/2

08:45-08:45

2 stops32h 00m

Brisbane

Sun 22/2

06:05-14:41

2 stops24h 36m

$1,470

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 19/1

13:55-09:30

2 stops27h 05m

Adelaide

Mon 2/2

14:55-20:05

1 stop21h 40m

$1,735

ChicagoMelbourne

ORD - AVV

ORDAVV

Chicago O'Hare Intl

Sat 21/2

21:14-14:10

3 stops47h 56m

Melbourne Avalon

Sat 28/2

20:55-15:10

3 stops59h 15m

$1,736

ChicagoHobart

ORD - HBA

ORDHBA

Chicago O'Hare Intl

Mon 19/1

18:30-21:10

2 stops33h 40m

Hobart

Wed 28/1

06:20-14:50

2 stops25h 30m

$2,148

Flights are sorted by cheapest return 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?

In general, May 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 $1,275. If you don’t want to visit Australia in May, then you should wait until March to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $1,278.

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

On average, the least expensive day to fly to Australia from Chicago O'Hare Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $1,382. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Chicago O'Hare Intl Airport to Australia on a Thursday will generally be more expensive and average around $3,693. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Australia is in the afternoon. momondo users have found flights departing from Chicago O'Hare Intl Airport to Australia in the afternoon for as low as $1,772. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the evening, with an average ticket price of $2,435. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,618 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 $1,278 on momondo.

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

You could potentially save up to 37% 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 50m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Australia takes 21h 50m
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.
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  • 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?

  • 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
American AirlinesPriceFrom $1,287Free cancellationRating
7.2
11,050 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,303Free cancellationRating
7.5
947 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.

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