$517+ Cheap flights from Illinois to Sydney (SYD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Oct 26 — Nov 21
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Sydney 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
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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 Illinois to Sydney
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Cheapest flights from Illinois to SydneyExplore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 26, 2026.
Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 26, 2026.
This oojo deal was found by Cheapflights users on 9/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:00 pm -
2 stops26h 35m
Mon 11/169:55 am -
2 stops27h 42m
Deal found 9/23![Air New Zealand logo]()
$1,248
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 11/104:25 pm -
1 stop34h 50m
Tue 11/1712:25 pm -
2 stops33h 55m
Deal found 9/22![ANA logo]()
$1,260
This lol.travel deal was found by Cheapflights users on 9/21. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:40 pm -
1 stop24h 40m
Sun 11/111:20 am -
1 stop25h 39m
Deal found 9/21![Air Canada logo]()
$1,262
This FlightHub deal was found by Cheapflights users on 9/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/109:57 pm -
2 stops41h 38m
Tue 11/247:30 am -
2 stops38h 31m
Deal found 9/23![Air New Zealand logo]()
$1,267
This SmartFares deal was found by Cheapflights users on 9/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/137:00 am -
2 stops44h 15m
Sun 11/229:45 pm -
1 stop26h 35m
Deal found 9/21![ANA logo]()
$1,281
This FlightHub deal was found by Cheapflights users on 9/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
2 stops34h 35m
Wed 11/259:55 am -
2 stops28h 50m
Deal found 9/25![Air New Zealand logo]()
$1,282
This FlightHub deal was found by Cheapflights users on 9/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:00 pm -
2 stops27h 35m
Wed 11/49:55 am -
2 stops30h 03m
Deal found 9/22![Air New Zealand logo]()
$1,283
This FlightHub deal was found by Cheapflights users on 9/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/14:25 pm -
1 stop25h 05m
Mon 3/112:25 pm -
2 stops33h 40m
Deal found 9/21![ANA logo]()
$1,284
This FlightHub deal was found by Cheapflights users on 9/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:30 pm -
2 stops45h 05m
Fri 11/1311:50 am -
2 stops24h 06m
Deal found 9/23![Air New Zealand logo]()
$1,292
This FlightHub deal was found by Cheapflights users on 9/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:00 pm -
2 stops43h 35m
Sat 10/3111:50 am -
2 stops24h 47m
Deal found 9/24![Air New Zealand logo]()
$1,295
This United Airlines deal was found by Cheapflights users on 9/24. 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 11/86:30 am -
2 stops33h 35m
Sun 11/1511:20 am -
2 stops23h 32m
Deal found 9/24![United Airlines logo]()
$1,404
This United Airlines deal was found by Cheapflights users on 9/21. 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.
Sun 11/298:15 am -
2 stops29h 45m
Sun 12/1311:20 am -
2 stops28h 49m
Deal found 9/21![United Airlines logo]()
$1,414
Best flights from Illinois to SydneyDiscover carefully curated flight deals from Illinois to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
Discover carefully curated flight deals from Illinois to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
This Philippine Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 10/196:00 am -
2 stops35h 00m
Sun 11/111:30 am -
2 stops34h 32m
Deal found 9/24![Multiple Airlines logo]()
$1,310
This United Airlines deal was found by Cheapflights users on 9/24. 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 11/86:30 am -
2 stops33h 35m
Sun 11/1511:20 am -
2 stops23h 32m
Deal found 9/24![United Airlines logo]()
$1,404
This Qantas Airways deal was found by Cheapflights users on 9/21. 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.
Sat 10/3112:35 pm -
1 stop26h 20m
Wed 11/49:50 pm -
2 stops34h 58m
Deal found 9/21![Qantas Airways logo]()
$1,431
This Gurufare deal was found by Cheapflights users on 9/22. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:05 am -
2 stops34h 30m
Thu 11/1210:20 pm -
2 stops40h 42m
Deal found 9/22![Cathay Pacific logo]()
$1,540
This American Airlines deal was found by Cheapflights users on 9/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:13 pm -
2 stops27h 47m
Sat 11/142:05 pm -
1 stop24h 57m
Deal found 9/23![American Airlines logo]()
$1,650
This Delta deal was found by Cheapflights users on 9/21. 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.
Mon 9/286:59 pm -
1 stop20h 51m
Thu 10/810:15 am -
1 stop19h 23m
Deal found 9/21![Delta logo]()
$1,662
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Fri 11/67:20 am -
2 stops30h 05m
Thu 11/1211:15 am -
3 stops29h 34m
Deal found 9/25![Alaska Airlines logo]()
$1,725
This Qatar Airways deal was found by Cheapflights users on 9/21. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2712:14 pm -
2 stops49h 36m
Mon 12/149:10 pm -
2 stops38h 07m
Deal found 9/21![Qatar Airways logo]()
$2,002
This United Airlines deal was found by Cheapflights users on 9/21. 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.
Sun 11/298:15 am -
2 stops29h 45m
Sun 12/1311:20 am -
2 stops28h 49m
Deal found 9/21![United Airlines logo]()
$1,414
This Philippine Airlines deal was found by Cheapflights users on 9/21. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am -
2 stops34h 00m
Sun 10/1811:15 am -
2 stops34h 25m
Deal found 9/21![Multiple Airlines logo]()
$1,513
This United Airlines deal was found by Cheapflights users on 9/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:40 am -
2 stops29h 25m
Thu 11/1211:20 am -
2 stops23h 32m
Deal found 9/20![United Airlines logo]()
$1,464
This BusinessClass deal was found by Cheapflights users on 9/22. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:11 am -
1 stop30h 44m
Thu 11/122:05 pm -
1 stop24h 57m
Deal found 9/22![Qantas Airways logo]()
$1,665
This Philippine Airlines deal was found by Cheapflights users on 9/20. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
2 stops35h 00m
Sat 10/1011:15 am -
2 stops33h 45m
Deal found 9/20![Multiple Airlines logo]()
$1,545
This Delta deal was found by Cheapflights users on 9/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:00 pm -
1 stop22h 30m
Thu 11/1210:40 am -
1 stop19h 57m
Deal found 9/22![Delta logo]()
$1,713
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Sun 11/157:20 am -
3 stops30h 05m
Sat 12/1211:15 am -
3 stops29h 44m
Deal found 9/25![Alaska Airlines logo]()
$1,872
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Thu 3/47:00 am -
2 stops33h 20m
Tue 4/69:30 am -
2 stops26h 46m
Deal found 9/22![United Airlines logo]()
$1,564
This Qantas Airways deal was found by Cheapflights users on 9/21. 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.
Thu 11/512:13 pm -
2 stops25h 12m
Thu 11/122:05 pm -
1 stop24h 57m
Deal found 9/21![Multiple Airlines logo]()
$1,590
This Delta deal was found by Cheapflights users on 9/21. 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.
Tue 10/136:59 pm -
1 stop20h 51m
Fri 10/1610:15 am -
1 stop29h 32m
Deal found 9/21![Delta logo]()
$1,980
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 10/1310:30 am -
2 stops29h 25m
Tue 10/2010:30 am -
2 stops25h 45m
Deal found 9/24![United Airlines logo]()
$1,657
This American Airlines deal was found by Cheapflights users on 9/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/112:14 pm -
2 stops25h 41m
Mon 12/1411:20 am -
2 stops26h 01m
Deal found 9/21![American Airlines logo]()
$2,235
This Alaska Airlines deal was found by Cheapflights users on 9/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:49 pm -
2 stops35h 01m
Fri 10/168:45 pm -
3 stops24h 55m
Deal found 9/21![Multiple Airlines logo]()
$1,756
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Tue 12/14:30 pm -
1 stop23h 35m
Sun 12/1311:20 am -
1 stop22h 25m
Deal found 9/23![United Airlines logo]()
$1,662
This oojo deal was found by Cheapflights users on 9/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/44:43 pm -
1 stop21h 12m
Tue 4/612:00 pm -
1 stop20h 10m
Deal found 9/22![Qantas Airways logo]()
$2,499
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Fri 11/62:22 pm -
1 stop23h 38m
Fri 11/139:15 am -
1 stop24h 14m
Deal found 9/22![United Airlines logo]()
$2,009
This Qantas Airways deal was found by Cheapflights users on 9/23. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/73:21 pm -
3 stops29h 04m
Sat 11/142:05 pm -
2 stops23h 16m
Deal found 9/23![Multiple Airlines logo]()
$2,751
This Qantas Airways deal was found by Cheapflights users on 9/21. 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.
Sun 11/2912:14 pm -
3 stops31h 11m
Sun 12/1311:05 am -
3 stops26h 16m
Deal found 9/21![Multiple Airlines logo]()
$3,175
This Qantas Airways deal was found by Cheapflights users on 9/23. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3012:14 pm -
3 stops29h 51m
Thu 12/172:05 pm -
2 stops24h 04m
Deal found 9/23![Multiple Airlines logo]()
$4,348
This Qatar Airways deal was found by Cheapflights users on 9/22. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:42 pm -
2 stops70h 28m
Fri 10/162:00 pm -
3 stops41h 53m
Deal found 9/22![Qatar Airways logo]()
$18,317
This BusinessClass deal was found by Cheapflights users on 9/22. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:35 pm -
1 stop26h 20m
Fri 10/161:00 pm -
1 stop26h 23m
Deal found 9/22![Qantas Airways logo]()
$24,501
This Qantas Airways deal was found by Cheapflights users on 9/22. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:35 pm -
3 stops26h 55m
Fri 10/166:25 am -
3 stops32h 58m
Deal found 9/22![Multiple Airlines logo]()
$20,235
Last-minute flights from Illinois to SydneyDiscover last-minute flight deals from Illinois to Sydney. Data last updated September 26, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Sydney. Data last updated September 26, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 9/22. 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.
Sat 10/105:30 pm -
2 stops46h 35m
Fri 10/1610:10 am -
2 stops29h 13m
Deal found 9/22![Qantas Airways logo]()
$12,220
This Qatar Airways deal was found by Cheapflights users on 9/22. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:42 pm -
2 stops70h 28m
Fri 10/162:00 pm -
3 stops41h 53m
Deal found 9/22![Qatar Airways logo]()
$18,317
This Qantas Airways deal was found by Cheapflights users on 9/22. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:35 pm -
3 stops26h 55m
Fri 10/166:25 am -
3 stops32h 58m
Deal found 9/22![Multiple Airlines logo]()
$20,235
This Philippine Airlines deal was found by Cheapflights users on 9/25. 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.
Tue 10/136:00 am -
2 stops35h 00m
Mon 10/2611:30 am -
2 stops33h 30m
Deal found 9/25![Multiple Airlines logo]()
$1,319
This lol.travel deal was found by Cheapflights users on 9/21. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:40 pm -
1 stop24h 40m
Sun 11/111:20 am -
1 stop25h 39m
Deal found 9/21![Air Canada logo]()
$1,262
This Philippine Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 10/196:00 am -
2 stops35h 00m
Sun 11/111:30 am -
2 stops34h 32m
Deal found 9/24![Multiple Airlines logo]()
$1,310
This Flightnetwork deal was found by Cheapflights users on 9/23. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/193:40 pm -
1 stop24h 40m
Sun 11/111:20 am -
2 stops25h 32m
Deal found 9/23![Air Canada logo]()
$1,312
This Justfly.com deal was found by Cheapflights users on 9/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:05 pm -
2 stops26h 35m
Mon 11/97:25 pm -
2 stops42h 10m
Deal found 9/25![Air New Zealand logo]()
$1,301
This FlightHub deal was found by Cheapflights users on 9/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:00 pm -
2 stops27h 35m
Wed 11/49:55 am -
2 stops30h 03m
Deal found 9/22![Air New Zealand logo]()
$1,283
This FlightHub deal was found by Cheapflights users on 9/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:00 pm -
2 stops43h 35m
Sat 10/3111:50 am -
2 stops24h 47m
Deal found 9/24![Air New Zealand logo]()
$1,295
This lol.travel deal was found by Cheapflights users on 9/22. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:30 pm -
1 stop25h 05m
Sun 11/811:20 am -
2 stops25h 32m
Deal found 9/22![Air Canada logo]()
$1,314
This Qantas Airways deal was found by Cheapflights users on 9/21. 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.
Sat 10/3112:35 pm -
1 stop26h 20m
Wed 11/49:50 pm -
2 stops34h 58m
Deal found 9/21![Qantas Airways logo]()
$1,431
One-way flights from Illinois to SydneySearch for one-way flight options from Illinois to Sydney. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
Search for one-way flight options from Illinois to Sydney. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 10/248:01 pm -
1 stop42h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$517
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:01 pm -
1 stop43h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:01 pm -
1 stop43h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$552
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:30 am -
2 stops30h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$559
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:01 pm -
1 stop42h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$570
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:25 am -
2 stops30h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$574
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:30 am -
2 stops54h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$575
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:30 am -
2 stops57h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$584
This Kiwi.com deal was found by Cheapflights users on 9/21. 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.
Tue 12/85:29 pm -
2 stops43h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$608
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:01 pm -
1 stop42h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$610
Find flight deals from Illinois to Sydney
Keep the following information in mind while searching for Illinois to Sydney flight deals. Data was last updated September 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,248 (oojo) |
One-way from | $517 (Kiwi.com) |
Popular in | December |
Cheapest in | June |
Average price | $1,605 |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Sydney 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 7,457,451 searches. Data last updated September 26, 2026.
Use the filters below to find and compare flights from Illinois to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sun 10/25
6:00 am-9:50 am
2 stops35h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$686
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sat 10/31
8:30 pm-9:50 am
2 stops45h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$687
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Thu 11/19
5:40 am-9:50 am
2 stops35h 10m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$687
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Wed 11/4
6:29 am-9:50 am
2 stops34h 21m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$688
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 12/8
4:25 pm-8:15 pm
1 stop34h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$749
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sat 10/10
8:01 pm-7:30 am
1 stop43h 29m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$785
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/10
7:20 am-6:25 am
3 stops30h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$836
Quickest round-trip
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sun 10/25
5:35 pm-10:30 am
1 stop24h 55m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$860
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Fri 10/23
11:25 am-8:10 pm
2 stops40h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$912
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Mon 9/28
4:15 pm-11:45 am
1 stop28h 30m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$987
Showing 1-10 of 40 resultsSorted by cheapest first
Best time to book a flight from Illinois to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from Illinois with our price prediction graph.
ORD-SYD
PIA-SYD
MLI-SYD
CMI-SYD
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 Illinois to Sydney
USIL-SYD
ORD-SYD
PIA-SYD
MLI-SYD
CMI-SYD
What is the cheapest month to book a flight from Illinois to Sydney?
Currently, February is the cheapest month in which you can book a flight from Illinois to Sydney (average of $1,230). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,727). 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 much does it cost to fly round-trip from Illinois to Sydney?
Airfare is typical for this route at the moment.
Illinois to Sydney flights typically cost between $1,147 and $1,662 in November.The cheapest round-trip price found within the last 5 days was $1,248 on Air New Zealand (Nov 2-Nov 16).
How far ahead should I book a flight from Illinois to Sydney?
The price you pay for your flight from Illinois to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
Wollongong
Coogee
Manly
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Alternative routes for Illinois to Sydney
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Complete your trip
Complete your trip to Sydney by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Sydney by cabin class
Find flights from Illinois to Sydney, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Sydney flights
Browse other Illinois and Sydney flight options. Last updated on September 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sydney
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 26, 2026.
Top 8 airlines flying from Illinois to Sydney
Discover the top 8 airlines that operate flights from Illinois to Sydney. 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 7,457,451 searches. Data last updated September 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$237 | Average$1,530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$819 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,364 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,746 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,590 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,117 | Average$1,312 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,193 | Average$1,270 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,294 | Average$1,662 | FlexibilityNo cancel fee | On-time78% |