$800 Find Cheap Flights from Chicago O'Hare Airport to Australia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from O'Hare Intl to Australia departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Australia

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 15% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from O'Hare Intl to Australia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,702
Brisbane
Brisbane1 stop$1,931
Adelaide
Adelaide2 stops$2,133
Perth
Perth2 stops$2,307
Cairns
Cairns2 stops$2,354
Canberra
Canberra2 stops$2,140
Sydney
Sydney1 stop$1,702
Brisbane
Brisbane1 stop$1,931
Adelaide
Adelaide2 stops$2,133
Perth
Perth2 stops$2,307
Cairns
Cairns2 stops$2,354
Canberra
Canberra2 stops$2,140

Book Cheap O'Hare Intl to Australia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from O'Hare Intl to Australia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from O'Hare Intl to Australia

Tue, 23 Jun - Sat, 1 Aug
Multiple Airlines Logo
18:20 - 19:20
ORD
-
MEL
34h 00m
2 stops
Multiple Airlines Logo
07:30 - 21:22
MEL
-
ORD
28h 52m
2 stops
$1,655Multiple Airlines
Sat, 27 Jun - Sat, 1 Aug
Multiple Airlines Logo
18:29 - 19:20
ORD
-
MEL
33h 51m
2 stops
Multiple Airlines Logo
07:30 - 21:22
MEL
-
ORD
28h 52m
2 stops
$1,700Multiple Airlines
Wed, 26 Aug - Tue, 8 Sep
ANA Logo
17:45 - 19:10
ORD
-
SYD
34h 25m
1 stop
ANA Logo
20:55 - 08:40
SYD
-
ORD
26h 45m
1 stop
$1,702ANA
Tue, 1 Sep - Tue, 8 Sep
ANA Logo
17:45 - 19:10
ORD
-
SYD
34h 25m
1 stop
ANA Logo
20:55 - 08:40
SYD
-
ORD
26h 45m
1 stop
$1,703ANA
Wed, 5 Aug - Sun, 30 Aug
ANA Logo
17:45 - 19:10
ORD
-
SYD
34h 25m
1 stop
ANA Logo
11:45 - 04:45
SYD
-
ORD
32h 00m
2 stops
$1,715ANA
Tue, 4 Aug - Wed, 16 Sep
Air Canada Logo
15:40 - 07:05
ORD
-
BNE
24h 25m
1 stop
Air Canada Logo
10:00 - 14:48
BNE
-
ORD
19h 48m
1 stop
$1,931Air Canada
Thu, 24 Sep - Mon, 28 Sep
Air Canada Logo
15:40 - 07:05
ORD
-
BNE
24h 25m
1 stop
Air Canada Logo
10:00 - 14:48
BNE
-
ORD
19h 48m
1 stop
$1,932Air Canada
Thu, 2 Jul - Sun, 2 Aug
Singapore Airlines Logo
21:20 - 13:55
ORD
-
ADL
50h 05m
2 stops
Singapore Airlines Logo
20:00 - 22:05
ADL
-
ORD
40h 35m
2 stops
$2,133Singapore Airlines
Sun, 2 Aug - Sun, 9 Aug
Qantas Airways Logo
19:08 - 11:05
ORD
-
ADL
25h 27m
2 stops
Qantas Airways Logo
06:00 - 15:54
ADL
-
ORD
24h 24m
2 stops
$2,509Qantas Airways
Sat, 20 Jun - Sat, 27 Jun
Qantas Airways Logo
08:10 - 13:10
ORD
-
HBA
38h 00m
2 stops
Qantas Airways Logo
16:55 - 14:18
HBA
-
ORD
60h 23m
2 stops
$2,889Qantas Airways
Booking Insights

KAYAK's insights & trends for O'Hare Intl to Australia flights

Get data-powered insights and trends into flights from O'Hare Intl to Australia to help you find the cheapest flights, the best time to fly, and much more.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Australia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Australia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago O'Hare Intl Airport to Australia is November, when tickets cost $156 (return) on average. On the other hand, the most expensive months are February and April, when the average cost of return tickets is $1,160 and $990 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Australia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from Chicago O'Hare Intl Airport to Australia, you should book around 5 weeks before departure, which saves you about 9% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonJuly
Cheapest flight$788
Best time to beat the crowds (1% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flight from Chicago O'Hare Airport to Sydney

FAQs - booking Australia flights

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport to Australia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago O'Hare Airport to Australia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago O'Hare Airport to Australia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Chicago O'Hare Airport to Australia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago O'Hare Airport to Australia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Chicago O'Hare Airport to Australia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago O'Hare Airport to Australia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Chicago O'Hare Airport to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from O'Hare Intl to Australia

 
Need help choosing which airline to fly with from O'Hare Intl to Australia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 1033 reviews
7.7Boarding
8.1Crew
7.0Food
7.2Entertainment
7.5Comfort
Airline reviews

I never flew with alliance. Kayak is a joke and none of the flights or times were correct. Won’t ever use kayak again

2.0 MediocreAnonymous, May 2026
CBR - BNE
Read more Qantas Airways reviews

I never flew with alliance. Kayak is a joke and none of the flights or times were correct. Won’t ever use kayak again

I missed my flight due to unforeseen circumstances It was, however , an excellent price !

We had a medical emergency, needing to get to an emergency room upon landing at LAX. I let the back flight attendants know the situation. One, David, contacted the pilot, who made arrangements for EMT's to be there when we got off the plane. They went above and beyond for us. We didn't have to go through customs, as a customs person came to us and checked us right at the exit of the jet way. Another wonderful woman, a United employee at LAX, perhaps a customer service liaison, took care of our luggage situation, as we weren't going to make our connection to Bozeman. When we came back to LAX to see when we could get a flight to Bozeman, the personnel are very accommodating and booked us on the next flight out, and assigned good seats. It was a horrible flight, physically, from Sydney to LAX, , but the professionalism of all involved was excellent! We are very grateful fir the way they all stepped in and helped during a very unpleasant medical situation. Thank you!!

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

Very good overall. However, your choices of free movies was limited and there was no music Channel???

I couldn't hear all of the announcements. It was nice when they put them on the screen.

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

Everything you need to know for your flight from O'Hare Intl to Australia

Information on your arrival and departure airports