$431 Find Cheap Flights from Australia to Illinois - Compare and Save
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Australia to Illinois departing on 2/2. 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.
Round-trip
1 adult
Economy
0 bags
Round-trip
1 adult, Economy, 0 bags
Save 25% or more on flights. Compare deals from all over the web.
Never overpay with our price tracking tools.
Filter searches by price, airline and more to find your best flights.
Flight Deals
Booking Insights
Flight Deals
Cheap Flights from Australia to Illinois
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Australia to Illinois 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.
Round-trip
One-way
Last minute
Recent round-trip flight deals from Australia to Illinois
Thu, Feb 18 - Mon, Feb 22
11:20 am - 10:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
28h 35m1 stop Los Angeles
6:46 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
21h 14m1 stop Los Angeles
$735American Airlines
Mon, Nov 16 - Mon, Nov 30
10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
30h 15m1 stop Los Angeles
7:45 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
31h 45m1 stop Los Angeles
$739Delta
Mon, Apr 26 - Sat, May 8
9:15 am - 4:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
46h 22m2 stops Los Angeles Atlanta Hartsfield-Jackson
5:55 pm - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
45h 55m2 stops Atlanta Hartsfield-Jackson Los Angeles
$739Delta
Wed, Jan 20 - Sun, Jan 31
10:40 am - 5:53 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
24h 13m1 stop Los Angeles
7:25 am - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
30h 25m1 stop Los Angeles
$740Delta
Wed, Jan 20 - Sun, Jan 31
10:40 am - 1:53 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
20h 13m1 stop Los Angeles
12:42 pm - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
25h 08m2 stops Minneapolis St Paul Los Angeles
$740Delta
Wed, Jan 20 - Sun, Jan 31
10:40 am - 6:48 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
25h 08m2 stops Los Angeles Atlanta Hartsfield-Jackson
12:42 pm - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
25h 08m2 stops Minneapolis St Paul Los Angeles
$740Delta
Mon, Nov 16 - Mon, Nov 30
11:10 am - 4:05 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
21h 55m1 stop Los Angeles
9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
42h 57m1 stop Los Angeles
$757Qantas Airways
Thu, Feb 18 - Mon, Feb 22
2:05 pm - 2:18 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
41h 13m1 stop Dallas/Fort Worth
4:59 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
23h 01m1 stop Los Angeles
$767Qantas Airways
Tue, Apr 27 - Sat, May 8
10:20 am - 4:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
21h 35m1 stop Los Angeles
8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
42h 40m1 stop Los Angeles
$769Qantas Airways
Mon, Apr 26 - Sat, May 8
12:00 pm - 7:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
22h 55m1 stop Dallas/Fort Worth
8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
42h 40m1 stop Los Angeles
$769Qantas Airways
Recent one-way flight deals from Australia to Illinois
Tue, Feb 2
1:35 pm - 5:53 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
21h 18m1 stop Los Angeles
$431Delta
Tue, Feb 2
10:40 am - 9:36 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
27h 56m2 stops Los Angeles Minneapolis St Paul
$431Delta
Tue, Feb 2
2:00 pm - 12:26 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
27h 26m3 stops Nadi Los Angeles Denver Intl
$469Multiple Airlines
Sun, Feb 28
6:00 am - 7:05 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
42h 05m2 stops Nadi Los Angeles
$471Multiple Airlines
Wed, Dec 2
6:00 am - 12:53 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
35h 53m3 stops Nadi Los Angeles Denver Intl
$477Multiple Airlines
Sun, Feb 28
2:55 pm - 12:26 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
50h 31m3 stops Nadi Los Angeles Denver Intl
$479Multiple Airlines
Sat, Feb 6
2:00 pm - 12:26 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
27h 26m3 stops Nadi Los Angeles Denver Intl
$487Multiple Airlines
Fri, Mar 5
10:40 am - 11:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
30h 19m2 stops Los Angeles Atlanta Hartsfield-Jackson
$490Delta
Mon, Nov 30
11:10 am - 5:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
23h 49m1 stop Los Angeles
$1,203Qantas Airways
Wed, Dec 2
2:05 pm - 7:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
22h 54m1 stop Dallas/Fort Worth
$1,205Qantas Airways
Recent last minute flight deals from Australia to Illinois
Mon, Nov 9 - Mon, Nov 23
11:10 am - 5:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
23h 49m1 stop Los Angeles
9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
42h 57m1 stop Los Angeles
$736American Airlines
Mon, Nov 9 - Mon, Nov 23
10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
30h 15m1 stop Los Angeles
7:30 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
32h 00m2 stops Salt Lake City Los Angeles
$739Delta
Mon, Nov 9 - Mon, Nov 23
10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
30h 15m1 stop Los Angeles
2:32 pm - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
24h 58m1 stop Los Angeles
$739Delta
Mon, Nov 9 - Mon, Nov 23
10:40 am - 9:47 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
28h 07m2 stops Los Angeles Salt Lake City
11:19 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
28h 11m2 stops Detroit Metropolitan Wayne County Los Angeles
$739Delta
Mon, Nov 9 - Mon, Nov 23
2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl
12:05 pm - 12:35 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi
$1,090Multiple Airlines
Mon, Nov 9 - Mon, Nov 23
2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl
32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl
12:05 pm - 12:35 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith
31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi
$1,096Multiple Airlines
Thu, Nov 5 - Mon, Nov 9
6:00 am - 10:30 pmADL Adelaide-ORD Chicago O'Hare Intl
33h 00m2 stops Sydney Kingsford Smith Los Angeles
3:25 pm - 4:35 pmORD Chicago O'Hare Intl-ADL Adelaide
32h 40m2 stops Los Angeles Sydney Kingsford Smith
$1,266Qantas Airways
Thu, Nov 5 - Mon, Nov 9
12:15 pm - 12:30 pmBNE Brisbane-ORD Chicago O'Hare Intl
40h 15m1 stop Hong Kong Intl
2:10 pm - 10:45 amORD Chicago O'Hare Intl-BNE Brisbane
28h 35m1 stop Hong Kong Intl
$1,387Cathay Pacific
Thu, Nov 5 - Mon, Nov 9
12:15 pm - 12:30 pmBNE Brisbane-ORD Chicago O'Hare Intl
40h 15m1 stop Hong Kong Intl
2:10 pm - 10:45 amORD Chicago O'Hare Intl-BNE Brisbane
28h 35m1 stop Hong Kong Intl
$1,388Cathay Pacific
Mon, Nov 9 - Wed, Nov 25
8:40 am - 4:55 pmPER Perth-ORD Chicago O'Hare Intl
22h 15m1 stop Manila Ninoy Aquino Intl
10:45 pm - 7:20 amORD Chicago O'Hare Intl-PER Perth
42h 35m1 stop Manila Ninoy Aquino Intl
$1,405Philippine Airlines
Booking Insights
KAYAK's insights & trends for flights to Illinois
Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.
Prices
More
What is the cheapest month to fly from Australia to Illinois?
To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Australia to Illinois, 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 Australia to Illinois is February, when tickets cost $805 (return) on average. On the other hand, the most expensive months are January and April, when the average cost of round-trip tickets is $1,424 and $1,248 respectively.
How far in advance should I book a flight from Australia to Illinois?
To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Illinois, 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 the flight from Australia to Illinois, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.
How many airports are there in Illinois?
There are 12 airports in Illinois. The busiest airport is Chicago O'Hare Airport (ORD), with 92% of all flights arriving there.
What are the most popular destinations in Illinois?
Based on KAYAK flight searches, the most popular destination is Chicago (92% of total searches to Illinois). The next most popular destinations are St. Louis (7%) and Moline (1%).
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Sydney to Chicago O'Hare Airport
FAQs for booking flights from Australia to Illinois
How does KAYAK find such low prices on flights from Australia to Illinois?
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 Australia to Illinois.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Australia to Illinois?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Australia to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Australia to Illinois?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Australia to Illinois 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 Australia to Illinois?
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 Australia to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
Reviews of the top airlines flying from Australia to Illinois
See real verified KAYAK customer reviews for airlines flying to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Australia to Illinois. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Australia to Illinois? 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.
Overall, it was a very good experience. I would have given it a 10/10, especially based on our flight from SFO to Melbourne. The cabin crew on that flight were wonderful and incredibly attentive. They took extra care when setting up our beds so we could sleep comfortably without being disturbed. Dinner was served promptly and smoothly. I woke up quite late, when the flight was already preparing for landing, and the crew still made sure I was taken care of. They brought me English tea in a proper cup, and when it was time to prepare the cabin for landing, they thoughtfully transferred it into a takeaway cup so I could continue enjoying it along with some breakfast. Those small, thoughtful gestures made the long flight feel much more comfortable and special. The service from the SFO to Melbourne crew was truly excellent.
Overall, it was a very good experience. I would have given it a 10/10, especially based on our flight from SFO to Melbourne. The cabin crew on that flight were wonderful and incredibly attentive. They took extra care when setting up our beds so we could sleep comfortably without being disturbed. Dinner was served promptly and smoothly. I woke up quite late, when the flight was already preparing for landing, and the crew still made sure I was taken care of. They brought me English tea in a proper cup, and when it was time to prepare the cabin for landing, they thoughtfully transferred it into a takeaway cup so I could continue enjoying it along with some breakfast. Those small, thoughtful gestures made the long flight feel much more comfortable and special. The service from the SFO to Melbourne crew was truly excellent.
Great food and good entertainment options for the long flight.
Loved the food and beverages available, spacious economy class, excellent entertainment
Very good overall. Highly recommend for all flying to Australia
We had bulkhead seats in a A380 in the upper deck in seats 31 D and E. Storage was very limited other than in overhead bin - which is not within reach when in seat. Yet paying same price as others in premium economy who have a lot more storage within arm’s reach. Seems very unfair.
Good check in and helpful staff. Delayed for 1 hour. Took about 45 Mins to get baggage’s at DFW . Food was average ( Hindu meal ) . Overall it was good experience
When I originally booked this flight, I was expecting to travel on Qantas. When the itinerary changed and the long-haul segment was operated by American Airlines, we were disappointed but remained open-minded. Unfortunately, the overall service experience fell far short of expectations. This was a long-haul international flight. Getting up periodically to use the restroom or stretch is inevitable, especially on flights of this duration. However, each time we stood up, we felt as though we were inconveniencing the crew. The tone and body language often suggested that we were in the way or disrupting something simply by moving about the cabin. As a result, I avoided getting up as often as I needed to and was physically very sore upon arrival. Meal service was similarly impersonal. The options were presented in single words “beef or veggie,” “pasta or beef” without any description of what was actually being served. There was little engagement or courtesy beyond that. Even simple expressions of gratitude were often not acknowledged. I am accustomed to no-frills travel and do not expect luxury. What was disappointing was not the absence of extras, but the absence of basic warmth and professionalism. On a long-haul international flight, small moments of courtesy and humanity make a significant difference. In this case, the experience felt transactional and dismissive rather than welcoming. I hope this feedback is taken constructively, as there is a meaningful difference between efficient service and indifferent service.
Business seats not as comfortable or private as most competitors (e.g. Qantas was outstanding), and movie selection was much more limited than Qantas or United has been recently
Hard to move and get out of my seat when the passenger in front is in recline position.
Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.
Fine except from Chicago to moline three different gate changes and flight times
When booking, the connection times seem fine. But in reality, my two connections were cut short by the first leg being delayed due to issues at the destination (too much traffic going into SFO, ORD) and it became extremely stressful.
Promised internet. Tried for nine hours to log in, no way. I tried the free option, I tried the paid option, I tried restarting my phone.. several times! Very aggrevating as I was trying to keep up with an emregency medial issue with my dad, but could not because the promised service was not available.
I had bad experience with United airline. No live rep, they only have AI that respond to customers concern
Flight and crew were great. Need more legroom and do not allow seats to recline.
We arrived to Chicago nearly 30 minutes early, which was great, but then was on the ground for over an hour because the gate was not available. The issue I had was the pilot estimation was frustrating. First he said he was informed it would be 20 minutes but he said "it will probably be more like 10 minutes". After 30 minutes he came back on the comm and said it would be another 10 minutes, maybe 20. I understand he was only giving estimates but he also layered in his own gut feel. We were never told why we didn't have a gate even after our scheduled entry.
Just sat on the run way after we arrived early
The Code Share with Air Canada was not very streamlined. I had to check in at airport (not online) on the outbound and return flights
Stored my cloth purse under seat in front off me as instructed. When I retrieved it, half of it was soaked, along with everything inside it. I don’t really know how that could have been prevented because the area did not look wet, but I was not happy about it.
Phx - ORD was nice 737 with starlink and the ORD - grr was ancient bare bones airbus with not even a power port lol
More options for your flight to Illinois
Add a hotel or car rental
Cabin class
Origins
Other destinations
Popular regions
Popular routes
Return flight
Complete your trip to Illinois with a hotel stay or car rental
Flights from all regions of Australia to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
This site uses cookies and other tracking technologies for essential, functional, analytical, and advertising purposes. By using the site, you agree to our Terms & Conditions and our Privacy Policy.
For more information about how we process your information, please see our Privacy Policy.
We value your privacy
KAYAK and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyze navigation, to offer and measure personalized advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.