$593+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Jul 18 — Jul 251
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 June 18, 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 June 18, 2026.
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:45 am
MEL
- ORD
1 stop22h 05m
American Airlines
Sun 8/99:00 am
ORD
- MEL
1 stop30h 45m
American Airlines
Deal found 6/13![American Airlines logo]()
$941
This Qantas Airways deal was found by Cheapflights users on 6/15. 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 8/109:45 am
MEL
- ORD
1 stop23h 02m
Multiple Airlines
Wed 8/1912:11 pm
ORD
- MEL
1 stop25h 49m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$944
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:45 am
MEL
- ORD
2 stops23h 16m
American Airlines
Wed 8/193:00 pm
ORD
- MEL
2 stops23h 00m
American Airlines
Deal found 6/15![American Airlines logo]()
$952
This United Airlines deal was found by Cheapflights users on 6/15. 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 7/159:30 am
MEL
- ORD
1 stop20h 05m
United Airlines
Wed 7/291:00 pm
ORD
- MEL
1 stop27h 30m
United Airlines
Deal found 6/15![United Airlines logo]()
$955
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Mon 7/1310:55 am
MEL
- ORD
1 stop27h 04m
United Airlines
Fri 7/316:00 am
ORD
- MEL
1 stop34h 30m
United Airlines
Deal found 6/17![United Airlines logo]()
$956
This Delta deal was found by Cheapflights users on 6/13. 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 7/2410:00 am
MEL
- MDW
2 stops23h 25m
Delta
Sun 8/26:58 pm
MDW
- MEL
2 stops45h 52m
Delta
Deal found 6/13![Delta logo]()
$961
This Delta deal was found by Cheapflights users on 6/15. 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 7/1510:00 am
MEL
- ORD
1 stop28h 18m
Delta
Wed 7/297:29 am
ORD
- MEL
1 stop33h 21m
Delta
Deal found 6/15![Delta logo]()
$962
This Delta deal was found by Cheapflights users on 6/16. 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 7/2410:00 am
MEL
- ORD
1 stop22h 35m
Delta
Sun 8/27:40 pm
ORD
- MEL
2 stops45h 10m
Delta
Deal found 6/16![Delta logo]()
$965
This KAYAK deal was found by Cheapflights users on 6/15. 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 7/249:30 am
MEL
- ORD
1 stop28h 46m
Air New Zealand
Sun 8/29:30 pm
ORD
- MEL
1 stop43h 00m
Air New Zealand
Deal found 6/15![Air New Zealand logo]()
$967
This TravelUp deal was found by Cheapflights users on 6/17. 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 7/1410:55 am
MEL
- ORD
1 stop20h 43m
Multiple Airlines
Wed 7/292:30 pm
ORD
- MEL
1 stop26h 45m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$969
This TravelUp deal was found by Cheapflights users on 6/16. 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.
Wed 7/1510:55 am
MEL
- ORD
1 stop20h 43m
Multiple Airlines
Wed 7/292:30 pm
ORD
- MEL
1 stop26h 45m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$972
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/292:20 pm
MEL
- ORD
2 stops24h 47m
American Airlines
Wed 8/53:22 pm
ORD
- MEL
1 stop24h 23m
American Airlines
Deal found 6/14![American Airlines logo]()
$974
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 June 18, 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 June 18, 2026.
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:45 am
MEL
- ORD
2 stops30h 06m
American Airlines
Sun 8/91:29 pm
ORD
- MEL
2 stops26h 16m
American Airlines
Deal found 6/13![American Airlines logo]()
$941
This Qantas Airways deal was found by Cheapflights users on 6/15. 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 8/109:45 am
MEL
- ORD
1 stop23h 02m
Multiple Airlines
Wed 8/1912:11 pm
ORD
- MEL
1 stop25h 49m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$944
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Thu 8/2710:55 am
MEL
- ORD
2 stops26h 50m
United Airlines
Sat 9/57:30 am
ORD
- MEL
2 stops33h 45m
United Airlines
Deal found 6/15![United Airlines logo]()
$955
This Delta deal was found by Cheapflights users on 6/13. 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 7/2410:00 am
MEL
- MDW
2 stops23h 25m
Delta
Sun 8/26:58 pm
MDW
- MEL
2 stops45h 52m
Delta
Deal found 6/13![Delta logo]()
$961
This Qantas Airways deal was found by Cheapflights users on 6/17. 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.
Tue 7/1412:00 pm
SYD
- STL
1 stop19h 28m
Qantas Airways
Wed 10/146:30 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,049
This Air Canada deal was found by Cheapflights users on 6/15. 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 8/56:00 am
MEL
- STL
3 stops47h 02m
Air Canada
Sun 8/98:55 am
STL
- MEL
3 stops35h 40m
Air Canada
Deal found 6/15![Air Canada logo]()
$1,217
This Bravofly deal was found by Cheapflights users on 6/13. 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 Bravofly 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
Thu 7/2312:30 am
ORD
- BNE
1 stop28h 30m
EVA Air
Deal found 6/13![EVA Air logo]()
$1,309
This Cathay Pacific deal was found by Cheapflights users on 6/17. 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 11/171:20 pm
BNE
- ORD
2 stops39h 35m
Cathay Pacific
Tue 12/12:35 pm
ORD
- BNE
1 stop40h 35m
Cathay Pacific
Deal found 6/17![Cathay Pacific logo]()
$1,480
This Philippine Airlines deal was found by Cheapflights users on 6/16. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:10 am
BNE
- ORD
1 stop45h 45m
Philippine Airlines
Mon 11/1610:45 pm
ORD
- BNE
1 stop43h 10m
Philippine Airlines
Deal found 6/16![Philippine Airlines logo]()
$1,497
This United Airlines deal was found by Cheapflights users on 6/15. 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 7/159:30 am
MEL
- ORD
2 stops24h 05m
United Airlines
Wed 7/294:05 pm
ORD
- MEL
2 stops24h 25m
United Airlines
Deal found 6/15![United Airlines logo]()
$955
This Delta deal was found by Cheapflights users on 6/15. 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 7/1510:00 am
MEL
- ORD
1 stop28h 18m
Delta
Wed 7/297:29 am
ORD
- MEL
1 stop33h 21m
Delta
Deal found 6/15![Delta logo]()
$962
This oojo deal was found by Cheapflights users on 6/17. 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.
Thu 7/1612:15 pm
PER
- ORD
2 stops35h 45m
Japan Airlines
Thu 7/232:30 pm
ORD
- PER
2 stops45h 10m
Japan Airlines
Deal found 6/17![Japan Airlines logo]()
$1,949
This Qatar Airways deal was found by Cheapflights users on 6/13. 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.
Tue 10/2010:45 pm
PER
- ORD
2 stops47h 42m
Qatar Airways
Sat 10/247:20 pm
ORD
- PER
1 stop34h 25m
Qatar Airways
Deal found 6/13![Qatar Airways logo]()
$2,008
This Gotogate deal was found by Cheapflights users on 6/17. 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.
Thu 7/169:35 pm
PER
- ORD
1 stop30h 20m
ANA
Thu 7/2311:50 am
ORD
- PER
1 stop43h 10m
ANA
Deal found 6/17![ANA logo]()
$2,116
This Delta deal was found by Cheapflights users on 6/15. 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 7/2410:00 am
MEL
- ORD
2 stops26h 29m
Delta
Sun 8/27:17 pm
ORD
- MEL
2 stops45h 33m
Delta
Deal found 6/15![Delta logo]()
$962
This United Airlines deal was found by Cheapflights users on 6/17. 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 7/249:30 am
MEL
- ORD
1 stop28h 46m
United Airlines
Sun 8/29:30 pm
ORD
- MEL
1 stop43h 00m
United Airlines
Deal found 6/17![United Airlines logo]()
$984
This Virgin Australia deal was found by Cheapflights users on 6/17. 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 Virgin Australia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:40 pm
PER
- ORD
2 stops32h 55m
Virgin Australia
Mon 8/32:30 pm
ORD
- PER
2 stops32h 10m
Virgin Australia
Deal found 6/17![Virgin Australia logo]()
$2,183
This American Airlines deal was found by Cheapflights users on 6/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/612:00 pm
SYD
- STL
1 stop26h 42m
American Airlines
Mon 8/103:32 pm
STL
- SYD
2 stops24h 33m
American Airlines
Deal found 6/17![American Airlines logo]()
$1,099
This Qantas Airways deal was found by Cheapflights users on 6/17. 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 7/139:10 am
SYD
- STL
1 stop29h 49m
Qantas Airways
Sat 10/176:51 pm
STL
- SYD
1 stop20h 04m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,099
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Thu 8/2710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Sun 9/63:13 pm
STL
- SYD
2 stops24h 42m
United Airlines
Deal found 6/14![United Airlines logo]()
$1,018
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/89:10 am
SYD
- STL
2 stops25h 16m
American Airlines
Mon 7/209:08 am
STL
- SYD
2 stops30h 57m
American Airlines
Deal found 6/15![American Airlines logo]()
$1,142
This Qantas Airways deal was found by Cheapflights users on 6/17. 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.
Sat 7/189:10 am
SYD
- STL
1 stop29h 49m
Qantas Airways
Thu 10/156:30 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,148
This Delta deal was found by Cheapflights users on 6/17. 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.
Tue 11/1710:40 am
SYD
- STL
2 stops27h 09m
Delta
Tue 12/112:30 pm
STL
- SYD
2 stops27h 00m
Delta
Deal found 6/17![Delta logo]()
$1,110
This SmartFares deal was found by Cheapflights users on 6/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:15 pm
BNE
- ORD
1 stop37h 55m
EVA Air
Sat 8/2212:30 am
ORD
- BNE
1 stop28h 30m
EVA Air
Deal found 6/13![EVA Air logo]()
$1,367
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:45 pm
SYD
- ORD
2 stops23h 15m
Multiple Airlines
Wed 7/298:20 pm
ORD
- SYD
2 stops31h 30m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$1,377
This Trip.com deal was found by Cheapflights users on 6/17. 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.
Tue 11/1711:15 am
SYD
- STL
1 stop29h 27m
Qantas Airways
Tue 12/17:00 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,189
This Delta deal was found by Cheapflights users on 6/13. 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.
Sat 10/1010:15 am
SYD
- ORD
2 stops27h 19m
Delta
Sat 10/3112:15 pm
ORD
- SYD
2 stops27h 15m
Delta
Deal found 6/13![Delta logo]()
$1,123
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:45 am
MEL
- STL
2 stops37h 38m
American Airlines
Sun 9/272:27 pm
STL
- MEL
2 stops25h 18m
American Airlines
Deal found 6/14![American Airlines logo]()
$1,254
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 7/238:35 pm
BNE
- ORD
1 stop24h 42m
Multiple Airlines
Thu 7/309:13 pm
ORD
- BNE
2 stops46h 22m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$1,445
This oojo deal was found by Cheapflights users on 6/17. 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.
Sat 8/16:00 am
ADL
- ORD
2 stops28h 14m
Qantas Airways
Sat 8/89:06 pm
ORD
- ADL
2 stops45h 49m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,201
Last-minute flights from Australia to IllinoisDiscover last-minute flight deals from Australia to Illinois. Data last updated June 18, 2026 and is based on user searches.
Discover last-minute flight deals from Australia to Illinois. Data last updated June 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Mon 7/1310:55 am
MEL
- ORD
1 stop27h 04m
United Airlines
Fri 7/316:00 am
ORD
- MEL
1 stop34h 30m
United Airlines
Deal found 6/17![United Airlines logo]()
$956
This Trip.com deal was found by Cheapflights users on 6/16. 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 7/131:15 pm
SYD
- ORD
2 stops32h 02m
Multiple Airlines
Wed 8/127:15 am
ORD
- SYD
3 stops47h 55m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$982
This TravelUp deal was found by Cheapflights users on 6/17. 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 7/1410:55 am
MEL
- ORD
1 stop20h 43m
Multiple Airlines
Wed 7/292:30 pm
ORD
- MEL
1 stop26h 45m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$969
This United Airlines deal was found by Cheapflights users on 6/15. 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 7/159:30 am
MEL
- ORD
1 stop20h 05m
United Airlines
Wed 7/291:00 pm
ORD
- MEL
1 stop27h 30m
United Airlines
Deal found 6/15![United Airlines logo]()
$955
This Delta deal was found by Cheapflights users on 6/15. 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 7/1510:00 am
MEL
- ORD
2 stops26h 29m
Delta
Wed 7/2912:27 pm
ORD
- MEL
2 stops28h 23m
Delta
Deal found 6/15![Delta logo]()
$962
This TravelUp deal was found by Cheapflights users on 6/16. 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.
Wed 7/1510:55 am
MEL
- ORD
1 stop20h 43m
Multiple Airlines
Wed 7/292:30 pm
ORD
- MEL
1 stop26h 45m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$972
This Delta deal was found by Cheapflights users on 6/13. 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 7/2410:00 am
MEL
- MDW
2 stops23h 25m
Delta
Sun 8/26:58 pm
MDW
- MEL
2 stops45h 52m
Delta
Deal found 6/13![Delta logo]()
$961
This Delta deal was found by Cheapflights users on 6/16. 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 7/2410:00 am
MEL
- ORD
1 stop22h 35m
Delta
Sun 8/27:40 pm
ORD
- MEL
2 stops45h 10m
Delta
Deal found 6/16![Delta logo]()
$965
This KAYAK deal was found by Cheapflights users on 6/15. 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 7/249:30 am
MEL
- ORD
1 stop28h 46m
Air New Zealand
Sun 8/29:30 pm
ORD
- MEL
1 stop43h 00m
Air New Zealand
Deal found 6/15![Air New Zealand logo]()
$967
This United Airlines deal was found by Cheapflights users on 6/16. 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 7/249:30 am
MEL
- ORD
1 stop28h 46m
United Airlines
Sun 8/29:30 pm
ORD
- MEL
1 stop43h 00m
United Airlines
Deal found 6/16![United Airlines logo]()
$981
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:45 am
MEL
- ORD
1 stop22h 05m
American Airlines
Sun 8/99:00 am
ORD
- MEL
1 stop30h 45m
American Airlines
Deal found 6/13![American Airlines logo]()
$941
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/292:20 pm
MEL
- ORD
2 stops24h 47m
American Airlines
Wed 8/53:22 pm
ORD
- MEL
1 stop24h 23m
American Airlines
Deal found 6/14![American Airlines logo]()
$974
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 June 18, 2026.
Search for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated June 18, 2026.
This SmartFares deal was found by Cheapflights users on 6/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:15 am
SYD
- STL
2 stops24h 40m
Delta
Deal found 6/15![Delta logo]()
$593
This SmartFares deal was found by Cheapflights users on 6/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:15 am
SYD
- STL
2 stops22h 29m
Delta
Deal found 6/16![Delta logo]()
$598
This Kiwi.com deal was found by Cheapflights users on 6/14. 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 7/277:20 am
SYD
- ORD
3 stops37h 57m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$610
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Sat 6/2710:55 am
MEL
- STL
2 stops52h 02m
United Airlines
Deal found 6/15![United Airlines logo]()
$618
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/206:00 am
BNE
- ORD
3 stops39h 19m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$623
This Delta deal was found by Cheapflights users on 6/17. 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 7/309:15 am
SYD
- STL
2 stops29h 38m
Delta
Deal found 6/17![Delta logo]()
$626
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Thu 7/3010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/14![United Airlines logo]()
$631
This Delta deal was found by Cheapflights users on 6/14. 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 9/29:15 am
SYD
- MDW
2 stops28h 21m
Delta
Deal found 6/14![Delta logo]()
$633
This Delta deal was found by Cheapflights users on 6/14. 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 9/109:15 am
SYD
- ORD
1 stop23h 08m
Delta
Deal found 6/14![Delta logo]()
$633
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/59:00 pm
MEL
- ORD
3 stops48h 17m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$634
This Delta deal was found by Cheapflights users on 6/17. 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 10/299:40 am
SYD
- MDW
2 stops23h 10m
Delta
Deal found 6/17![Delta logo]()
$635
This Delta deal was found by Cheapflights users on 6/16. 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.
Tue 11/310:40 am
SYD
- ORD
2 stops27h 54m
Delta
Deal found 6/16![Delta logo]()
$636
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 June 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $941 (American Airlines) |
One-way from | $593 (SmartFares) |
Popular in | June |
Cheapest in | August |
Average price | $1,314 |
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 June 18, 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
Mon 7/27
9:45 am-12:51 am
2 stops30h 06m
Chicago O'Hare Intl
Sun 8/9
1:29 pm-6:45 am
2 stops26h 16m
$941
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Mon 8/10
9:45 am-5:47 pm
1 stop23h 02m
Chicago O'Hare Intl
Wed 8/19
12:11 pm-5:00 am
1 stop25h 49m
$944
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Thu 8/27
10:55 am-10:45 pm
2 stops26h 50m
Chicago O'Hare Intl
Sat 9/5
7:30 am-8:15 am
2 stops33h 45m
$955
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Wed 7/15
9:30 am-6:35 pm
2 stops24h 05m
Chicago O'Hare Intl
Wed 7/29
4:05 pm-7:30 am
2 stops24h 25m
$955
MelbourneChicago
MEL - MDW
MELMDW
Melbourne
Fri 7/24
10:00 am-6:25 pm
2 stops23h 25m
Chicago Midway
Sun 8/2
6:58 pm-7:50 am
2 stops45h 52m
$961
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Wed 7/15
10:00 am-11:18 pm
1 stop28h 18m
Chicago O'Hare Intl
Wed 7/29
7:29 am-7:50 am
1 stop33h 21m
$962
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Fri 7/24
10:00 am-9:29 pm
2 stops26h 29m
Chicago O'Hare Intl
Sun 8/2
7:17 pm-7:50 am
2 stops45h 33m
$962
MelbourneChicago
MEL - ORD
MELORD
Melbourne
Fri 7/24
9:30 am-11:16 pm
1 stop28h 46m
Chicago O'Hare Intl
Sun 8/2
9:30 pm-7:30 am
1 stop43h 00m
$984
Quickest round-trip
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Thu 8/27
10:20 am-6:39 pm
1 stop23h 19m
Lambert-St Louis
Sun 9/6
3:13 pm-6:55 am
2 stops24h 42m
$1,018
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Tue 7/14
12:00 pm-4:28 pm
1 stop19h 28m
Lambert-St Louis
Wed 10/14
6:30 am-7:30 am
1 stop33h 00m
$1,049
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.
SYD-STL
SYD-ORD
MEL-STL
BNE-ORD
SYD-MDW
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
SYD-STL
SYD-ORD
MEL-STL
BNE-ORD
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 June is currently the most expensive (average of $2,502). 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.
How far ahead should I book a flight from Australia to Illinois?
The best time to book flights from Australia to Illinois is 44 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.
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 June 18, 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.
Entertainment
7.8
Boarding
8.4
Crew
8.7
Food
7.7
Comfort
8.2
Overall
8.3
Reviews
1 / 20
4.0
OkayPaul,Jun 2026
HND - DFW
Entertainment
7.8
Boarding
8.4
Crew
8.7
Food
7.7
Comfort
8.2
Overall
8.3
Reviews
1 / 20
4.0
OkayPaul,Jun 2026
HND - DFW
Entertainment
7.8
Boarding
8.4
Crew
8.7
Food
7.7
Comfort
8.2
Overall
8.3
Reviews
1 / 20
4.0
OkayPaul,Jun 2026
HND - DFW
Entertainment
7.8
Boarding
8.4
Crew
8.7
Food
7.7
Comfort
8.2
Overall
8.3
Reviews
1 / 20
4.0
OkayPaul,Jun 2026
HND - DFW
Entertainment
7.8
Boarding
8.4
Crew
8.7
Food
7.7
Comfort
8.2
Overall
8.3
Reviews
1 / 20
4.0
OkayPaul,Jun 2026
HND - DFW
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.
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 June 18, 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 June 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$862 | Average$933 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$902 | Average$1,178 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$970 | Average$1,316 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$973 | Average$976 | FlexibilityNo cancel fee | On-time79% |