$633 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 12/11. 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 21% 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
Sydney2 stops$1,299
Brisbane
Brisbane2 stops$1,625
Perth
Perth2 stops$1,906
Adelaide
Adelaide2 stops$1,305
Cairns
Cairns2 stops$1,620
Canberra
Canberra2 stops$1,643
Sydney
Sydney2 stops$1,299
Brisbane
Brisbane2 stops$1,625
Perth
Perth2 stops$1,906
Adelaide
Adelaide2 stops$1,305
Cairns
Cairns2 stops$1,620
Canberra
Canberra2 stops$1,643

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

Thu, 6 Nov - Sat, 22 Nov
American Airlines Logo
17:25 - 09:00ORD-SYD
22h 35m2 stops
American Airlines Logo
17:45 - 00:12SYD-ORD
23h 27m2 stops
$1,299American Airlines
Find Deal
Sat, 22 Nov - Tue, 30 Dec
Qantas Airways Logo
11:40 - 09:00ORD-SYD
28h 20m1 stop
Qantas Airways Logo
11:20 - 16:51SYD-ORD
22h 31m1 stop
$1,301Qantas Airways
Find Deal
Sat, 8 Nov - Tue, 18 Nov
American Airlines Logo
09:35 - 09:00ORD-SYD
30h 25m1 stop
American Airlines Logo
11:20 - 15:55SYD-ORD
21h 35m1 stop
$1,302American Airlines
Find Deal
Thu, 6 Nov - Sat, 22 Nov
Qantas Airways Logo
08:50 - 09:00ORD-SYD
31h 10m1 stop
Qantas Airways Logo
11:20 - 16:48SYD-ORD
22h 28m1 stop
$1,304Qantas Airways
Find Deal
Tue, 27 Jan - Mon, 2 Feb
Air Canada Logo
15:40 - 08:40ORD-SYD
48h 00m2 stops
Air Canada Logo
11:20 - 14:41SYD-ORD
20h 21m1 stop
$1,307Air Canada
Find Deal
Sun, 15 Feb - Sun, 1 Mar
United Airlines Logo
15:55 - 07:00ORD-SYD
22h 05m1 stop
United Airlines Logo
12:10 - 14:45SYD-ORD
19h 35m1 stop
$1,308United Airlines
Find Deal
Thu, 25 Dec - Thu, 15 Jan
Air Canada Logo
15:40 - 06:55ORD-SYD
22h 15m1 stop
Air Canada Logo
11:20 - 20:00SYD-ORD
25h 40m2 stops
$1,311Air Canada
Find Deal
Sat, 14 Feb - Tue, 3 Mar
United Airlines Logo
18:17 - 09:15ORD-SYD
21h 58m1 stop
United Airlines Logo
14:00 - 17:02SYD-ORD
20h 02m1 stop
$1,313United Airlines
Find Deal
Tue, 20 Jan - Fri, 30 Jan
Air New Zealand Logo
14:40 - 09:25ORD-MEL
25h 45m2 stops
Air New Zealand Logo
12:10 - 21:32MEL-ORD
26h 22m2 stops
$2,017Air New Zealand
Find Deal
Sun, 1 Mar - Mon, 9 Mar
Air New Zealand Logo
12:55 - 12:15ORD-CBR
30h 20m3 stops
Air New Zealand Logo
08:50 - 21:34CBR-ORD
28h 44m3 stops
$2,523Air New Zealand
Find Deal
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 March, when tickets cost $1,316 (return) on average. On the other hand, the most expensive months are December and October, when the average cost of return tickets is $2,226 and $2,217 respectively.

What’s the cheapest day of the week to fly from Chicago O'Hare Airport to Australia?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Australia clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Australia on a Friday and more expensive on a Thursday. On your return trip to Chicago O'Hare Airport, you should consider flying back on a Monday, and avoid Sundays for better deals.

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 3 weeks before departure, which saves you about 30% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$633
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 15% lower 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.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally in the evening, when retur flights cost $1,813 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Australia is generally at night, which is peak travel time and where the average cost of a ticket is $2,492.

Reviews of the top airlines 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 922 reviews
7.2Entertainment
7.7Boarding
8.2Crew
7.0Food
7.5Comfort
Airline reviews

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

2.0 MediocreR, Oct 2025WLG - BNE
Read more Qantas Airways reviews

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

The plane was late, when we did board the plane was as cold as a freezer. I was freezing the entire flight, no blankets. Lost miserable flight I’ve ever had.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.