$476+ Cheap flights from Australia to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
May 24 — May 311
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Australia to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Australia to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Australia to IllinoisExplore the most affordable flight options available from Australia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
Explore the most affordable flight options available from Australia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
- STL
2 stops41h 46m
Multiple Airlines
Thu 5/284:48 pm
STL
- SYD
2 stops23h 32m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$1,028
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/259:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Wed 8/512:10 pm
STL
- SYD
2 stops52h 10m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,069
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Thu 5/281:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,070
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:15 pm
SYD
- ORD
3 stops48h 58m
Multiple Airlines
Fri 5/88:30 am
ORD
- SYD
3 stops46h 40m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,076
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/31:20 pm
SYD
- ORD
3 stops48h 53m
Multiple Airlines
Wed 6/107:12 am
ORD
- SYD
3 stops47h 58m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,084
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 am
SYD
- ORD
2 stops38h 50m
Multiple Airlines
Sat 5/96:55 am
ORD
- SYD
3 stops48h 15m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,090
This BYOjet deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:20 am
SYD
- STL
2 stops22h 13m
Air Canada
Fri 5/294:48 pm
STL
- SYD
2 stops23h 32m
Air Canada
Deal found 4/21![Air Canada logo]()
$1,093
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
SYD
- ORD
2 stops39h 04m
Multiple Airlines
Wed 8/129:33 am
ORD
- SYD
3 stops35h 17m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,095
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/81:15 pm
SYD
- ORD
3 stops46h 28m
Multiple Airlines
Wed 6/107:12 am
ORD
- SYD
3 stops47h 58m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,096
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Sun 5/311:05 pm
STL
- SYD
2 stops51h 15m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,100
This Air Canada deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/79:20 am
SYD
- STL
2 stops50h 05m
Air Canada
Sun 6/141:05 pm
STL
- SYD
2 stops51h 15m
Air Canada
Deal found 4/22![Air Canada logo]()
$1,101
This Trip.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/41:15 pm
SYD
- ORD
3 stops48h 58m
Multiple Airlines
Thu 6/117:12 am
ORD
- SYD
3 stops37h 38m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,103
Best flights from Australia to IllinoisDiscover carefully curated flight deals from Australia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
Discover carefully curated flight deals from Australia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
This Trip.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/39:45 am
MEL
- ORD
1 stop35h 19m
Multiple Airlines
Wed 6/106:55 am
ORD
- MEL
2 stops32h 50m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,418
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/510:00 am
MEL
- MDW
2 stops23h 33m
Delta
Fri 6/1211:05 am
MDW
- MEL
2 stops29h 45m
Delta
Deal found 4/21![Delta logo]()
$1,520
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:30 am
SYD
- STL
2 stops26h 52m
United Airlines
Sun 9/61:18 pm
STL
- SYD
2 stops26h 42m
United Airlines
Deal found 4/21![United Airlines logo]()
$1,550
This Air New Zealand deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:55 am
SYD
- ORD
2 stops26h 21m
Air New Zealand
Tue 9/224:45 pm
ORD
- SYD
2 stops25h 00m
Air New Zealand
Deal found 4/19![Air New Zealand logo]()
$1,611
This lol.travel deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:25 am
MEL
- ORD
1 stop39h 20m
Japan Airlines
Thu 6/2510:40 am
ORD
- MEL
1 stop28h 05m
Japan Airlines
Deal found 4/19![Japan Airlines logo]()
$1,615
This KAYAK deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:35 am
BNE
- ORD
2 stops25h 25m
Fiji Airways
Mon 8/247:00 pm
ORD
- BNE
2 stops24h 35m
Fiji Airways
Deal found 4/22![Fiji Airways logo]()
$1,635
This oojo deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/112:05 am
BNE
- ORD
1 stop28h 50m
Cathay Pacific
Tue 6/94:15 pm
ORD
- BNE
1 stop27h 35m
Cathay Pacific
Deal found 4/18![Cathay Pacific logo]()
$1,718
This Qantas Airways deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/189:10 am
SYD
- ORD
1 stop20h 08m
Qantas Airways
Tue 7/75:10 pm
ORD
- SYD
1 stop22h 55m
Qantas Airways
Deal found 4/19![Qantas Airways logo]()
$1,748
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/610:15 pm
BNE
- ORD
1 stop37h 55m
EVA Air
Sat 7/1812:30 am
ORD
- BNE
1 stop28h 30m
EVA Air
Deal found 4/20![EVA Air logo]()
$1,834
This BYOjet deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/810:55 pm
PER
- ORD
1 stop30h 55m
Qatar Airways
Mon 6/154:33 pm
ORD
- PER
2 stops37h 02m
Qatar Airways
Deal found 4/23![Qatar Airways logo]()
$1,855
This Emirates deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:20 pm
PER
- ORD
1 stop30h 25m
Emirates
Sun 9/68:35 pm
ORD
- PER
1 stop32h 00m
Emirates
Deal found 4/19![Emirates logo]()
$2,163
This Gotogate deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:00 pm
ADL
- ORD
3 stops37h 55m
Air Canada
Fri 6/129:55 am
ORD
- ADL
3 stops39h 30m
Air Canada
Deal found 4/21![Air Canada logo]()
$2,501
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:00 am
MEL
- MDW
2 stops23h 33m
Delta
Wed 6/1012:45 pm
MDW
- MEL
2 stops28h 05m
Delta
Deal found 4/19![Delta logo]()
$1,522
This Fiji Airways deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:25 pm
MEL
- ORD
2 stops22h 37m
Multiple Airlines
Thu 8/205:50 pm
ORD
- MEL
2 stops27h 10m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,536
This Japan Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/212:10 am
PER
- ORD
2 stops44h 10m
Japan Airlines
Sun 9/62:10 pm
ORD
- PER
2 stops45h 30m
Japan Airlines
Deal found 4/21![Japan Airlines logo]()
$1,623
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/39:30 am
SYD
- ORD
2 stops22h 35m
United Airlines
Wed 6/104:12 pm
ORD
- SYD
2 stops23h 48m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,701
This Qantas Airways deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/229:10 am
SYD
- ORD
1 stop21h 39m
Qantas Airways
Sun 7/197:01 pm
ORD
- SYD
1 stop21h 04m
Qantas Airways
Deal found 4/19![Qantas Airways logo]()
$1,748
This Fiji Airways deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/11:30 pm
MEL
- ORD
2 stops23h 15m
Multiple Airlines
Thu 6/256:00 pm
ORD
- MEL
2 stops27h 00m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,603
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1010:00 am
MEL
- MDW
2 stops23h 31m
Delta
Wed 6/1711:05 am
MDW
- MEL
2 stops29h 45m
Delta
Deal found 4/20![Delta logo]()
$1,636
This TravelUp deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:10 am
PER
- ORD
2 stops44h 35m
Japan Airlines
Wed 9/162:10 pm
ORD
- PER
2 stops43h 30m
Japan Airlines
Deal found 4/23![Japan Airlines logo]()
$1,645
This Cathay Pacific deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:05 am
BNE
- ORD
1 stop29h 15m
Cathay Pacific
Sun 8/24:00 pm
ORD
- BNE
1 stop39h 30m
Cathay Pacific
Deal found 4/19![Cathay Pacific logo]()
$1,819
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1210:55 am
MEL
- ORD
1 stop22h 40m
United Airlines
Sat 7/259:35 pm
ORD
- MEL
1 stop43h 40m
United Airlines
Deal found 4/22![United Airlines logo]()
$1,797
This Qatar Airways deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:45 pm
SYD
- STL
2 stops42h 14m
Qatar Airways
Tue 5/1211:06 am
STL
- SYD
2 stops39h 24m
Qatar Airways
Deal found 4/19![Qatar Airways logo]()
$1,996
This Kiwi.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:20 pm
BNE
- ORD
2 stops31h 44m
Multiple Airlines
Tue 6/99:13 pm
ORD
- BNE
1 stop40h 47m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,668
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:15 am
SYD
- MDW
2 stops24h 18m
Delta
Wed 8/121:00 pm
MDW
- SYD
2 stops26h 50m
Delta
Deal found 4/23![Delta logo]()
$1,695
This Qantas Airways deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/72:25 pm
BNE
- ORD
2 stops24h 34m
Qantas Airways
Mon 8/243:21 pm
ORD
- BNE
1 stop22h 39m
Qantas Airways
Deal found 4/21![Qantas Airways logo]()
$1,898
This Cathay Pacific deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:15 am
BNE
- ORD
2 stops47h 05m
Cathay Pacific
Fri 7/174:00 pm
ORD
- BNE
1 stop39h 30m
Cathay Pacific
Deal found 4/22![Cathay Pacific logo]()
$1,935
This Emirates deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:20 pm
PER
- ORD
1 stop30h 25m
Emirates
Tue 5/268:35 pm
ORD
- PER
1 stop32h 00m
Emirates
Deal found 4/20![Emirates logo]()
$2,167
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1210:55 am
MEL
- ORD
1 stop22h 40m
United Airlines
Tue 8/182:33 pm
ORD
- MEL
2 stops26h 42m
United Airlines
Deal found 4/23![United Airlines logo]()
$1,797
This Fiji Airways deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:35 am
BNE
- ORD
2 stops25h 25m
Multiple Airlines
Mon 8/243:21 pm
ORD
- BNE
2 stops28h 14m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,672
Last-minute flights from Australia to IllinoisDiscover last-minute flight deals from Australia to Illinois. Data last updated April 24, 2026 and is based on user searches.
Discover last-minute flight deals from Australia to Illinois. Data last updated April 24, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:15 pm
SYD
- ORD
3 stops48h 58m
Multiple Airlines
Fri 5/88:30 am
ORD
- SYD
3 stops46h 40m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,076
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 am
SYD
- ORD
2 stops38h 50m
Multiple Airlines
Sat 5/96:55 am
ORD
- SYD
3 stops48h 15m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,090
This Air Canada deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:20 am
SYD
- STL
2 stops44h 08m
Air Canada
Tue 5/127:05 am
STL
- SYD
2 stops33h 15m
Air Canada
Deal found 4/21![Air Canada logo]()
$1,108
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/99:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Wed 5/138:46 am
STL
- SYD
2 stops31h 34m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,161
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:50 pm
SYD
- ORD
1 stop27h 49m
Multiple Airlines
Tue 5/268:46 pm
ORD
- SYD
1 stop43h 44m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,286
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/125:50 pm
SYD
- ORD
1 stop27h 49m
Multiple Airlines
Wed 5/276:00 am
ORD
- SYD
2 stops34h 30m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$1,262
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
- STL
2 stops41h 46m
Multiple Airlines
Thu 5/284:48 pm
STL
- SYD
2 stops23h 32m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$1,028
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Thu 5/281:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,070
This BYOjet deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:20 am
SYD
- STL
2 stops22h 13m
Air Canada
Fri 5/294:48 pm
STL
- SYD
2 stops23h 32m
Air Canada
Deal found 4/21![Air Canada logo]()
$1,093
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Sun 5/311:05 pm
STL
- SYD
2 stops51h 15m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,100
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/259:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Wed 8/512:10 pm
STL
- SYD
2 stops52h 10m
Air Canada
Deal found 4/23![Air Canada logo]()
$1,069
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:50 pm
SYD
- ORD
1 stop27h 44m
Multiple Airlines
Tue 6/29:37 pm
ORD
- SYD
2 stops42h 53m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,203
One-way flights from Australia to IllinoisSearch for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
Search for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/212:40 pm
CNS
- ORD
2 stops34h 25m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$476
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:50 pm
SYD
- ORD
3 stops47h 10m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$533
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:55 pm
SYD
- ORD
3 stops50h 24m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:50 pm
SYD
- ORD
3 stops48h 10m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$551
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/273:15 pm
SYD
- ORD
3 stops59h 49m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$561
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:15 pm
MEL
- ORD
3 stops49h 49m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:25 am
MEL
- MDW
3 stops46h 42m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$597
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:25 am
MEL
- ORD
3 stops48h 45m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$608
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:10 am
SYD
- ORD
3 stops49h 06m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$613
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
MEL
- ORD
3 stops53h 04m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$664
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
MEL
- MDW
3 stops46h 42m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$679
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:15 pm
BNE
- ORD
3 stops49h 24m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$688
Find flight deals from Australia to Illinois
Keep the following information in mind while searching for Australia to Illinois flight deals. Data was last updated April 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,028 (Air Canada) |
One-way from | $476 (Kiwi.com) |
Popular in | April |
Cheapest in | August |
Average price | $1,592 |
Cheapflights Fare Finder
Customize your flight search to find flights from Australia to Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
Use the filters below to find and compare flights from Australia to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Wed 6/3
9:45 am-6:04 am
1 stop35h 19m
Chicago O'Hare Intl
Wed 6/10
6:55 am-6:45 am
2 stops32h 50m
$1,418
MelbourneChicago
MEL - MDW
MELMDW
Melbourne
Fri 6/5
10:00 am-6:33 pm
2 stops23h 33m
Chicago Midway
Fri 6/12
11:05 am-7:50 am
2 stops29h 45m
$1,520
MelbourneChicago
MEL - MDW
MELMDW
Melbourne
Wed 6/3
10:00 am-6:33 pm
2 stops23h 33m
Chicago Midway
Wed 6/10
12:45 pm-7:50 am
2 stops28h 05m
$1,522
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Tue 8/11
1:25 pm-9:02 pm
2 stops22h 37m
Chicago O'Hare Intl
Thu 8/20
5:50 pm-12:00 pm
2 stops27h 10m
$1,536
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Fri 8/14
9:30 am-9:22 pm
2 stops26h 52m
Lambert-St Louis
Sun 9/6
1:18 pm-7:00 am
2 stops26h 42m
$1,550
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Mon 6/1
1:30 pm-9:45 pm
2 stops23h 15m
Chicago O'Hare Intl
Thu 6/25
6:00 pm-12:00 pm
2 stops27h 00m
$1,603
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Tue 7/21
11:55 am-11:16 pm
2 stops26h 21m
Chicago O'Hare Intl
Tue 9/22
4:45 pm-8:45 am
2 stops25h 00m
$1,611
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Mon 6/1
7:25 am-7:45 am
1 stop39h 20m
Chicago O'Hare Intl
Thu 6/25
10:40 am-5:45 am
1 stop28h 05m
$1,615
PerthChicago
PER - ORD
PERORD
Perth
Wed 9/2
12:10 am-7:20 am
2 stops44h 10m
Chicago O'Hare Intl
Sun 9/6
2:10 pm-12:40 am
2 stops45h 30m
$1,623
BrisbaneChicago
BNE - ORD
BNEORD
Brisbane
Fri 8/7
11:35 am-10:00 pm
2 stops25h 25m
Chicago O'Hare Intl
Mon 8/24
7:00 pm-10:35 am
2 stops24h 35m
$1,635
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Australia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Australia with our price prediction graph.
CNS-ORD
SYD-STL
MEL-MDW
SYD-ORD
BNE-ORD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Australia to Illinois
AU0-USIL
CNS-ORD
SYD-STL
MEL-MDW
SYD-ORD
How far ahead should I book a flight from Australia to Illinois?
The best time to book flights from Australia to Illinois is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Australia to Illinois?
Currently, September is the cheapest month in which you can book a flight from Australia to Illinois (average of $123). Flying from Australia to Illinois in January is currently the most expensive (average of $842). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 24, 2026.
Peruse reviews from past customers who have flown with Japan Airlines,Qantas Airways, andUnited Airlines from Australia to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.3
Boarding
8.4
Entertainment
7.8
Crew
8.7
Food
7.7
Comfort
8.2
Reviews
1 / 20
8.0
ExcellentEvan,Feb 2026
NRT - ORD
Overall
8.3
Boarding
8.4
Entertainment
7.8
Crew
8.7
Food
7.7
Comfort
8.2
Reviews
1 / 20
8.0
ExcellentEvan,Feb 2026
NRT - ORD
Overall
8.3
Boarding
8.4
Entertainment
7.8
Crew
8.7
Food
7.7
Comfort
8.2
Reviews
1 / 20
8.0
ExcellentEvan,Feb 2026
NRT - ORD
Overall
8.3
Boarding
8.4
Entertainment
7.8
Crew
8.7
Food
7.7
Comfort
8.2
Reviews
1 / 20
8.0
ExcellentEvan,Feb 2026
NRT - ORD
Overall
8.3
Boarding
8.4
Entertainment
7.8
Crew
8.7
Food
7.7
Comfort
8.2
Reviews
1 / 20
8.0
ExcellentEvan,Feb 2026
NRT - ORD
Related info for your journey
Find useful and relevant information for your journey from Australia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Airlines
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Australia to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Australia to Illinois by cabin class
Find flights from Australia to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Australia and Illinois flights
Browse other Australia and Illinois flight options. Last updated on April 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Australia after your stay in Illinois
Australia to Illinois flights
Consider these flights traveling from Australia to Illinois.
Top 4 airlines flying from Australia to Illinois
Discover the top 4 airlines that operate flights from Australia to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$795 | Average$1,155 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$862 | Average$1,089 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$970 | Average$1,012 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$973 | Average$976 | FlexibilityNo cancel fee | On-time79% |