$609+ Cheap flights from Illinois to Australia
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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Sep 5 — Sep 121
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Australia with Cheapflights
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Cheapest flights from Illinois to AustraliaExplore the most affordable flight options available from Illinois to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 6, 2026.
Explore the most affordable flight options available from Illinois to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 6, 2026.
This Trip.com deal was found by Cheapflights users on 8/2. 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 9/19:20 am -
3 stops35h 30m
Tue 9/86:15 am -
3 stops44h 36m
Deal found 8/2![Multiple Airlines logo]()
$1,221
This oojo deal was found by Cheapflights users on 8/5. 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.
Wed 10/212:10 pm -
2 stops26h 35m
Mon 11/99:55 am -
2 stops26h 01m
Deal found 8/5![Air New Zealand logo]()
$1,223
This oojo deal was found by Cheapflights users on 8/5. 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 11/26:50 pm -
1 stop30h 00m
Wed 11/1111:40 pm -
1 stop31h 50m
Deal found 8/5![Qatar Airways logo]()
$1,225
This Trip.com deal was found by Cheapflights users on 8/1. 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 8/319:20 am -
3 stops35h 30m
Mon 9/71:15 pm -
3 stops44h 06m
Deal found 8/1![Multiple Airlines logo]()
$1,226
This Delta deal was found by Cheapflights users on 8/5. 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.
Sun 8/99:15 am -
2 stops30h 35m
Sun 8/239:15 am -
2 stops24h 40m
Deal found 8/5![Delta logo]()
$1,230
This FlightHub deal was found by Cheapflights users on 8/1. 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 11/86:50 pm -
1 stop35h 30m
Wed 11/1811:40 pm -
1 stop31h 50m
Deal found 8/1![Qatar Airways logo]()
$1,232
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/269:20 pm -
1 stop43h 10m
Tue 9/81:15 pm -
2 stops32h 02m
Deal found 8/3![Multiple Airlines logo]()
$1,232
This FlightHub deal was found by Cheapflights users on 8/5. 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 11/36:50 pm -
1 stop35h 30m
Wed 11/1111:40 pm -
1 stop31h 50m
Deal found 8/5![Qatar Airways logo]()
$1,235
This FlightHub deal was found by Cheapflights users on 8/5. 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 8/2310:27 am -
2 stops33h 13m
Tue 9/89:55 am -
2 stops28h 10m
Deal found 8/5![Air New Zealand logo]()
$1,235
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/313:13 pm -
2 stops24h 42m
Mon 9/710:20 am -
1 stop23h 19m
Deal found 8/1![United Airlines logo]()
$1,237
This lol.travel deal was found by Cheapflights users on 8/5. 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 9/2711:00 am -
2 stops41h 10m
Mon 10/129:45 pm -
1 stop26h 55m
Deal found 8/5![ANA logo]()
$1,240
This Trip.com deal was found by Cheapflights users on 8/2. 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.
Sat 9/126:30 am -
3 stops38h 35m
Sat 9/1912:35 pm -
3 stops35h 15m
Deal found 8/2![Multiple Airlines logo]()
$1,242
Best flights from Illinois to AustraliaDiscover carefully curated flight deals from Illinois to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 6, 2026.
Discover carefully curated flight deals from Illinois to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 6, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/314:40 pm -
2 stops23h 15m
Mon 9/710:20 am -
2 stops27h 41m
Deal found 8/1![United Airlines logo]()
$1,241
This Delta deal was found by Cheapflights users on 8/1. 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 9/76:20 am -
2 stops33h 30m
Mon 9/149:15 am -
2 stops29h 01m
Deal found 8/1![Delta logo]()
$1,332
This Air Canada deal was found by Cheapflights users on 8/5. 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 9/193:40 pm -
2 stops31h 40m
Sat 9/268:55 pm -
2 stops32h 48m
Deal found 8/5![Multiple Airlines logo]()
$1,390
This oojo deal was found by Cheapflights users on 8/4. 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.
Tue 9/17:20 pm -
1 stop29h 10m
Wed 9/165:50 pm -
2 stops35h 45m
Deal found 8/4![Qatar Airways logo]()
$1,394
This Justfly.com deal was found by Cheapflights users on 8/3. 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.
Mon 10/1912:59 pm -
3 stops33h 26m
Tue 11/106:10 am -
2 stops24h 57m
Deal found 8/3![Air Canada logo]()
$1,451
This FlightHub deal was found by Cheapflights users on 8/3. 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 12/1212:00 pm -
2 stops29h 10m
Tue 1/59:40 am -
1 stop24h 55m
Deal found 8/3![Qantas Airways logo]()
$1,749
This Alaska Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 9/92:22 pm -
2 stops26h 08m
Wed 9/165:50 pm -
3 stops27h 30m
Deal found 8/5![Alaska Airlines logo]()
$1,910
This United Airlines deal was found by Cheapflights users on 8/5. 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 10/201:29 pm -
2 stops27h 46m
Tue 11/312:45 pm -
2 stops25h 14m
Deal found 8/5![United Airlines logo]()
$1,267
This Delta deal was found by Cheapflights users on 8/3. 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 11/173:20 pm -
2 stops24h 10m
Wed 11/2510:40 am -
2 stops27h 11m
Deal found 8/3![Delta logo]()
$1,332
This oojo deal was found by Cheapflights users on 8/3. 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 9/127:20 pm -
2 stops33h 20m
Sat 9/1910:00 pm -
1 stop31h 35m
Deal found 8/3![Qatar Airways logo]()
$1,399
This United Airlines deal was found by Cheapflights users on 8/4. 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 10/47:08 am -
1 stop34h 07m
Mon 10/1911:55 am -
1 stop22h 48m
Deal found 8/4![United Airlines logo]()
$1,273
This Air Canada deal was found by Cheapflights users on 8/1. 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.
Tue 9/153:40 pm -
2 stops31h 40m
Tue 9/228:40 pm -
2 stops33h 03m
Deal found 8/1![Multiple Airlines logo]()
$1,421
This Air Canada deal was found by Cheapflights users on 8/1. 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.
Tue 9/153:40 pm -
2 stops29h 40m
Tue 9/228:00 pm -
2 stops33h 13m
Deal found 8/1![Air Canada logo]()
$1,454
This Delta deal was found by Cheapflights users on 8/1. 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 9/1110:29 am -
2 stops30h 21m
Fri 9/1810:00 am -
2 stops22h 37m
Deal found 8/1![Delta logo]()
$1,362
This Qatar Airways deal was found by Cheapflights users on 8/3. 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.
Mon 9/77:20 pm -
2 stops35h 40m
Tue 9/2210:45 pm -
1 stop31h 20m
Deal found 8/3![Qatar Airways logo]()
$1,422
This United Airlines deal was found by Cheapflights users on 8/2. 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 10/297:05 pm -
1 stop22h 25m
Tue 11/1012:45 pm -
1 stop22h 20m
Deal found 8/2![United Airlines logo]()
$1,312
This Justfly.com deal was found by Cheapflights users on 8/3. 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.
Sat 11/78:49 am -
2 stops39h 01m
Fri 11/136:10 am -
2 stops30h 21m
Deal found 8/3![Air Canada logo]()
$1,482
This Qatar Airways deal was found by Cheapflights users on 8/1. 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 9/157:20 pm -
1 stop29h 10m
Tue 9/225:50 pm -
2 stops35h 45m
Deal found 8/1![Qatar Airways logo]()
$1,442
This United Airlines deal was found by Cheapflights users on 8/5. 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 11/147:05 pm -
2 stops45h 35m
Wed 11/189:15 am -
1 stop26h 23m
Deal found 8/5![United Airlines logo]()
$1,319
This Mytrip deal was found by Cheapflights users on 8/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:30 am -
2 stops30h 20m
Tue 9/2211:15 pm -
2 stops34h 30m
Deal found 8/1![Multiple Airlines logo]()
$1,600
This Priceline deal was found by Cheapflights users on 8/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/123:40 pm -
2 stops31h 45m
Sat 9/196:30 pm -
2 stops34h 43m
Deal found 8/3![Air Canada logo]()
$1,485
This Qatar Airways deal was found by Cheapflights users on 8/2. 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.
Sun 8/307:20 pm -
2 stops33h 20m
Mon 9/144:10 pm -
1 stop37h 55m
Deal found 8/2![Qatar Airways logo]()
$1,446
This Delta deal was found by Cheapflights users on 8/3. 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 10/136:44 pm -
2 stops46h 06m
Wed 10/2111:00 am -
2 stops23h 00m
Deal found 8/3![Delta logo]()
$1,623
This United Airlines deal was found by Cheapflights users on 8/1. 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 11/11:08 pm -
3 stops26h 57m
Tue 12/111:50 am -
2 stops21h 36m
Deal found 8/1![United Airlines logo]()
$1,361
This Alaska Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 8/266:54 pm -
2 stops32h 56m
Tue 9/88:45 pm -
3 stops24h 35m
Deal found 8/6![Multiple Airlines logo]()
$1,659
This Alaska Airlines deal was found by Cheapflights users on 8/2. 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.
Wed 9/166:00 am -
2 stops34h 30m
Wed 9/235:50 pm -
3 stops33h 17m
Deal found 8/2![Alaska Airlines logo]()
$2,068
This oojo deal was found by Cheapflights users on 8/4. 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.
Sun 11/89:00 pm -
2 stops49h 50m
Wed 11/1810:20 am -
2 stops25h 00m
Deal found 8/4![Qantas Airways logo]()
$2,099
This Qatar Airways deal was found by Cheapflights users on 8/4. 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.
Thu 10/227:20 pm -
1 stop35h 45m
Sat 11/148:00 am -
2 stops47h 30m
Deal found 8/4![Qatar Airways logo]()
$1,463
This Priceline deal was found by Cheapflights users on 8/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:40 pm -
2 stops35h 05m
Tue 9/223:30 pm -
3 stops41h 18m
Deal found 8/5![Air Canada logo]()
$1,616
This Delta deal was found by Cheapflights users on 8/1. 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 11/116:44 pm -
2 stops46h 06m
Mon 11/2312:00 pm -
2 stops23h 04m
Deal found 8/1![Delta logo]()
$1,623
Last-minute flights from Illinois to AustraliaDiscover last-minute flight deals from Illinois to Australia. Data last updated August 6, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Australia. Data last updated August 6, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/5. 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.
Sun 8/99:15 am -
2 stops30h 35m
Sun 8/239:15 am -
2 stops24h 40m
Deal found 8/5![Delta logo]()
$1,230
This American Airlines deal was found by Cheapflights users on 8/5. 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.
Sun 8/96:00 am -
1 stop34h 05m
Sun 8/235:50 pm -
1 stop20h 09m
Deal found 8/5![American Airlines logo]()
$1,245
This FlightHub deal was found by Cheapflights users on 8/5. 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 8/2310:27 am -
2 stops33h 13m
Tue 9/89:55 am -
2 stops28h 10m
Deal found 8/5![Air New Zealand logo]()
$1,235
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/269:20 pm -
1 stop43h 10m
Tue 9/81:15 pm -
2 stops32h 02m
Deal found 8/3![Multiple Airlines logo]()
$1,232
This Trip.com deal was found by Cheapflights users on 8/1. 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 8/319:20 am -
3 stops35h 30m
Mon 9/71:15 pm -
3 stops44h 06m
Deal found 8/1![Multiple Airlines logo]()
$1,226
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/313:13 pm -
2 stops24h 42m
Mon 9/710:20 am -
1 stop23h 19m
Deal found 8/1![United Airlines logo]()
$1,237
This Trip.com deal was found by Cheapflights users on 8/2. 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 9/19:20 am -
3 stops35h 30m
Tue 9/86:15 am -
3 stops44h 36m
Deal found 8/2![Multiple Airlines logo]()
$1,221
This oojo deal was found by Cheapflights users on 8/2. 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 9/77:20 pm -
1 stop31h 10m
Mon 9/2810:10 pm -
1 stop31h 55m
Deal found 8/2![Qatar Airways logo]()
$1,246
This Trip.com deal was found by Cheapflights users on 8/2. 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.
Sat 9/126:30 am -
3 stops38h 35m
Sat 9/1912:35 pm -
3 stops35h 15m
Deal found 8/2![Multiple Airlines logo]()
$1,242
This American Airlines deal was found by Cheapflights users on 8/2. 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 9/1612:46 pm -
2 stops26h 59m
Wed 9/231:35 pm -
1 stop25h 08m
Deal found 8/2![American Airlines logo]()
$1,244
This Delta deal was found by Cheapflights users on 8/2. 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 9/162:30 pm -
2 stops26h 20m
Wed 9/2310:00 am -
2 stops28h 16m
Deal found 8/2![Delta logo]()
$1,262
This lol.travel deal was found by Cheapflights users on 8/5. 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 9/2711:00 am -
2 stops41h 10m
Mon 10/129:45 pm -
1 stop26h 55m
Deal found 8/5![ANA logo]()
$1,240
One-way flights from Illinois to AustraliaSearch for one-way flight options from Illinois to Australia. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
Search for one-way flight options from Illinois to Australia. Find affordable one-way fares based on user searches. Data last updated August 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/229:20 am -
3 stops55h 10m
Deal found 8/1![Multiple Airlines logo]()
$609
This Trip.com deal was found by Cheapflights users on 8/2. 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 8/1112:30 pm -
2 stops31h 25m
Deal found 8/2![Multiple Airlines logo]()
$618
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/1312:30 pm -
2 stops31h 25m
Deal found 8/2![Multiple Airlines logo]()
$623
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/59:20 pm -
1 stop43h 10m
Deal found 8/1![Multiple Airlines logo]()
$631
This Bravofly deal was found by Cheapflights users on 8/5. 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.
Tue 8/186:00 am -
1 stop34h 05m
Deal found 8/5![Qantas Airways logo]()
$635
This United Airlines deal was found by Cheapflights users on 8/5. 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 8/168:42 am -
1 stop31h 13m
Deal found 8/5![United Airlines logo]()
$647
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/69:20 pm -
1 stop43h 10m
Deal found 8/1![Multiple Airlines logo]()
$659
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 12/68:43 pm -
3 stops54h 32m
Deal found 8/1![Multiple Airlines logo]()
$660
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/108:25 pm -
2 stops44h 25m
Deal found 8/2![Multiple Airlines logo]()
$665
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/1212:30 pm -
2 stops52h 20m
Deal found 8/2![Multiple Airlines logo]()
$667
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/138:25 pm -
1 stop29h 25m
Deal found 8/1![Etihad Airways logo]()
$668
This Trip.com deal was found by Cheapflights users on 8/2. 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 8/259:20 pm -
2 stops54h 50m
Deal found 8/2![Multiple Airlines logo]()
$670
Find flight deals from Illinois to Australia
Keep the following information in mind while searching for Illinois to Australia flight deals. Data was last updated August 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,221 (Trip.com) |
One-way from | $609 (Kiwi.com) |
Popular in | September |
Cheapest in | February |
Average price | $1,465 |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Australia 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 August 6, 2026.
Use the filters below to find and compare flights from Illinois to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 8/31
4:40 pm-6:55 am
2 stops23h 15m
Sydney Kingsford Smith
Mon 9/7
10:20 am-11:01 pm
2 stops27h 41m
$1,241
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 10/20
1:29 pm-9:15 am
2 stops27h 46m
Melbourne
Tue 11/3
12:45 pm-8:59 pm
2 stops25h 14m
$1,267
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Sun 10/4
7:08 am-9:15 am
1 stop34h 07m
Melbourne
Mon 10/19
11:55 am-6:43 pm
1 stop22h 48m
$1,273
Quickest round-trip
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Thu 10/29
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Tue 11/10
12:45 pm-6:05 pm
1 stop22h 20m
$1,312
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sat 11/14
7:05 pm-9:40 am
2 stops45h 35m
Sydney Kingsford Smith
Wed 11/18
9:15 am-6:38 pm
1 stop26h 23m
$1,319
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 9/7
6:20 am-6:50 am
2 stops33h 30m
Sydney Kingsford Smith
Mon 9/14
9:15 am-11:16 pm
2 stops29h 01m
$1,332
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 11/17
3:20 pm-8:30 am
2 stops24h 10m
Sydney Kingsford Smith
Wed 11/25
10:40 am-8:51 pm
2 stops27h 11m
$1,332
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sun 11/1
1:08 pm-9:05 am
3 stops26h 57m
Sydney Kingsford Smith
Tue 12/1
11:50 am-4:26 pm
2 stops21h 36m
$1,361
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Fri 9/11
10:29 am-7:50 am
2 stops30h 21m
Melbourne
Fri 9/18
10:00 am-5:37 pm
2 stops22h 37m
$1,362
ChicagoMelbourne
ORD Chicago O'Hare Intl - AVV Melbourne Avalon
ORDAVV
Chicago O'Hare Intl
Sat 9/19
3:40 pm-2:20 pm
2 stops31h 40m
Melbourne Avalon
Sat 9/26
8:55 pm-2:43 pm
2 stops32h 48m
$1,390
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from Illinois with our price prediction graph.
STL-SYD
ORD-AVV
ORD-ADL
ORD-BNE
ORD-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 Australia
USIL-AU0
STL-SYD
ORD-AVV
ORD-ADL
ORD-BNE
What is the cheapest month to book a flight from Illinois to Australia?
Currently, February is the cheapest month in which you can book a flight from Illinois to Australia (average of $1,276). Flying from Illinois to Australia in July is currently the most expensive (average of $1,752). 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 Illinois to Australia?
Booking 37 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Australia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Australia. 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.
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Alternative routes for Illinois to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Australia by cabin class
Find flights from Illinois to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Australia flights
Browse other Illinois and Australia flight options. Last updated on August 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Australia
Find the right flight back to Illinois after your stay in Australia
Illinois to Australia flights
Consider these flights traveling from Illinois to Australia.
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 10 airlines flying from Illinois to Australia
Discover the top 10 airlines that operate flights from Illinois to Australia. 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 August 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$261 | Average$1,131 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$712 | Average$1,142 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$716 | Average$1,169 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,574 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$844 | Average$1,692 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,699 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,209 | Average$1,288 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,263 | Average$2,071 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$1,264 | Average$1,570 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$1,560 | Average$2,003 | FlexibilityNo cancel fee | On-time72% |