$599+ Cheap flights from Illinois to Sydney (SYD)
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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Sep 6 — Sep 131
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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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 August 7, 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 August 7, 2026.
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 8/7. Clicking the “Pick Dates” 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 9/14:45 pm -
2 stops26h 55m
Tue 9/89:55 am -
2 stops26h 40m
Deal found 8/7![Air New Zealand logo]()
$1,224
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 8/97:23 pm -
1 stop20h 32m
Sun 8/2310:20 am -
2 stops28h 11m
Deal found 8/5![United Airlines logo]()
$1,230
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.
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 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 oojo deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 11/152:40 pm -
2 stops24h 55m
Tue 12/17:25 pm -
2 stops40h 29m
Deal found 8/7![Air New Zealand logo]()
$1,242
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:40 pm -
2 stops26h 55m
Sun 11/152:05 pm -
2 stops45h 51m
Deal found 8/6![Air New Zealand logo]()
$1,244
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 8/7. Clicking the “Pick Dates” 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 10/248:09 pm -
2 stops44h 26m
Mon 11/911:50 am -
2 stops24h 06m
Deal found 8/7![Air New Zealand logo]()
$1,248
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:45 pm -
2 stops27h 20m
Mon 8/1712:00 pm -
1 stop21h 05m
Deal found 8/3![American Airlines logo]()
$1,278
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:55 pm -
2 stops25h 40m
Wed 11/117:25 pm -
2 stops44h 00m
Deal found 8/6![Air New Zealand logo]()
$1,303
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 August 7, 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 August 7, 2026.
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 Qantas Airways 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 pm -
1 stop22h 55m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/5![Qantas Airways logo]()
$1,375
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/110:54 am -
2 stops28h 56m
Tue 9/89:15 am -
2 stops24h 04m
Deal found 8/7![Delta logo]()
$1,616
This Alaska Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/13:43 pm -
2 stops36h 07m
Tue 9/88:45 pm -
3 stops24h 35m
Deal found 8/7![Multiple Airlines logo]()
$1,626
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.
Sun 11/17:00 am -
3 stops30h 25m
Sun 11/159:25 pm -
3 stops25h 15m
Deal found 8/2![Alaska Airlines logo]()
$1,754
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:42 am -
1 stop31h 13m
Sun 9/279:30 am -
2 stops24h 13m
Deal found 8/6![United Airlines logo]()
$1,328
This Qantas 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:42 pm -
1 stop22h 13m
Fri 10/306:00 am -
2 stops25h 53m
Deal found 8/3![Qantas Airways logo]()
$1,386
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/233:32 pm -
2 stops24h 28m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/7![United Airlines logo]()
$1,333
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.
Wed 9/163:13 pm -
2 stops24h 42m
Wed 9/2310:20 am -
1 stop23h 19m
Deal found 8/2![United Airlines logo]()
$1,361
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.
Sat 12/51:22 pm -
2 stops26h 08m
Mon 12/1410:40 am -
2 stops29h 16m
Deal found 8/3![Delta logo]()
$1,657
This Air New Zealand 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/74:05 pm -
2 stops25h 30m
Sun 12/2711:50 am -
2 stops23h 34m
Deal found 8/4![Multiple Airlines logo]()
$1,682
This Qantas Airways 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:43 pm -
1 stop21h 12m
Sun 11/156:05 am -
2 stops26h 43m
Deal found 8/6![Qantas Airways logo]()
$1,537
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.
Tue 12/297:58 pm -
2 stops41h 27m
Thu 1/1411:15 am -
3 stops29h 44m
Deal found 8/6![Alaska Airlines logo]()
$1,814
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/181:36 pm -
2 stops26h 19m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/7![United Airlines logo]()
$1,383
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.
Thu 12/319:30 am -
2 stops30h 00m
Tue 2/210:40 am -
2 stops28h 30m
Deal found 8/2![Delta logo]()
$1,707
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm -
2 stops32h 56m
Fri 9/48:45 pm -
3 stops24h 35m
Deal found 8/3![Multiple Airlines logo]()
$1,720
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:59 am -
2 stops29h 51m
Mon 10/1210:15 am -
2 stops28h 18m
Deal found 8/4![Delta logo]()
$1,708
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.
Thu 12/316:00 am -
2 stops31h 25m
Tue 2/211:15 am -
3 stops29h 44m
Deal found 8/2![Alaska Airlines logo]()
$1,882
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 9/198:29 am -
2 stops31h 26m
Sat 9/269:30 am -
2 stops28h 28m
Deal found 8/5![United Airlines logo]()
$1,462
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:30 pm -
1 stop21h 00m
Thu 2/1110:40 am -
1 stop20h 07m
Deal found 8/4![Delta logo]()
$1,908
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/42:55 pm -
1 stop24h 35m
Fri 2/1210:40 am -
1 stop29h 50m
Deal found 8/4![Delta logo]()
$1,908
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/262:35 pm -
1 stop25h 30m
Thu 1/711:20 am -
1 stop28h 42m
Deal found 8/3![United Airlines logo]()
$1,797
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.
Thu 8/2712:46 pm -
2 stops27h 04m
Sat 10/1010:15 am -
2 stops22h 32m
Deal found 8/3![Delta logo]()
$1,912
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:30 pm -
1 stop21h 00m
Wed 2/1010:40 am -
2 stops25h 00m
Deal found 8/4![Delta logo]()
$1,913
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 8/269:59 am -
2 stops29h 51m
Tue 9/89:15 am -
2 stops24h 04m
Deal found 8/7![Delta logo]()
$1,934
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.
Sat 12/262:00 pm -
1 stop26h 05m
Fri 1/111:20 am -
2 stops24h 31m
Deal found 8/4![United Airlines logo]()
$2,263
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.
Fri 1/1512:30 pm -
2 stops27h 00m
Wed 1/2010:40 am -
2 stops24h 57m
Deal found 8/5![Delta logo]()
$2,052
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.
Sun 10/1812:45 pm -
2 stops27h 05m
Sat 10/2410:15 am -
2 stops22h 32m
Deal found 8/2![Delta logo]()
$2,052
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.
Sat 8/221:51 pm -
2 stops25h 59m
Fri 9/49:15 am -
2 stops23h 46m
Deal found 8/3![Delta logo]()
$2,102
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 12/167:40 am -
1 stop31h 50m
Wed 12/3010:40 am -
2 stops39h 03m
Deal found 8/7![Delta logo]()
$2,335
Last-minute flights from Illinois to SydneyDiscover last-minute flight deals from Illinois to Sydney. Data last updated August 7, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Sydney. Data last updated August 7, 2026 and is based on user searches.
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:45 pm -
2 stops27h 20m
Mon 8/1712:00 pm -
1 stop21h 05m
Deal found 8/3![American Airlines logo]()
$1,278
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 oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:48 pm -
2 stops27h 52m
Tue 9/89:55 am -
2 stops26h 40m
Deal found 8/6![Air New Zealand logo]()
$1,223
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/78:42 am -
1 stop31h 13m
Sun 9/2710:20 am -
1 stop23h 23m
Deal found 8/7![United Airlines logo]()
$1,328
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/710:16 am -
1 stop29h 39m
Mon 9/149:10 am -
1 stop29h 20m
Deal found 8/7![American Airlines logo]()
$1,344
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/233:52 pm -
2 stops23h 58m
Wed 10/710:15 am -
2 stops24h 00m
Deal found 8/7![Delta logo]()
$1,333
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:30 am -
1 stop34h 00m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/3![American Airlines logo]()
$1,334
This oojo deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 9/236:30 am -
1 stop33h 35m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/7![Qantas Airways logo]()
$1,347
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 SydneySearch for one-way flight options from Illinois to Sydney. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
Search for one-way flight options from Illinois to Sydney. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1310:40 pm -
3 stops52h 35m
Deal found 8/6![Multiple Airlines logo]()
$599
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:46 pm -
2 stops46h 39m
Deal found 8/4![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 United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:10 am -
2 stops34h 50m
Deal found 8/6![United Airlines logo]()
$649
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 11/1711:15 am -
2 stops55h 15m
Deal found 8/7![Multiple Airlines logo]()
$652
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:10 pm -
1 stop42h 15m
Deal found 8/6![Multiple Airlines logo]()
$655
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:10 pm -
2 stops56h 05m
Deal found 8/6![Multiple Airlines logo]()
$660
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1510:40 pm -
3 stops52h 35m
Deal found 8/6![Multiple Airlines logo]()
$662
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” 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 12/26:00 am -
3 stops45h 15m
Deal found 8/7![Multiple Airlines logo]()
$664
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:20 pm -
2 stops45h 05m
Deal found 8/4![Multiple Airlines logo]()
$672
This Qantas Airways 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:45 pm -
1 stop21h 10m
Deal found 8/5![Qantas Airways logo]()
$672
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 August 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,221 (Trip.com) |
One-way from | $599 (Kiwi.com) |
Popular in | September |
Cheapest in | February |
Average price | $1,464 |
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 2,558,603 searches. Data last updated August 7, 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
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
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Sun 9/27
9:30 am-6:43 pm
2 stops24h 13m
$1,328
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
3:32 pm-7:00 am
2 stops24h 28m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,333
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/16
3:13 pm-6:55 am
2 stops24h 42m
Sydney Kingsford Smith
Wed 9/23
10:20 am-6:39 pm
1 stop23h 19m
$1,361
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
5:00 pm-6:55 am
1 stop22h 55m
Sydney Kingsford Smith
Wed 10/7
1:00 pm-6:20 pm
1 stop21h 20m
$1,375
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Fri 9/18
1:36 pm-6:55 am
2 stops26h 19m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,383
PeoriaSydney
PIA Greater Peoria - SYD Sydney Kingsford Smith
PIASYD
Greater Peoria
Mon 10/26
4:42 pm-6:55 am
1 stop22h 13m
Sydney Kingsford Smith
Fri 10/30
6:00 am-3:53 pm
2 stops25h 53m
$1,386
PeoriaSydney
PIA Greater Peoria - SYD Sydney Kingsford Smith
PIASYD
Greater Peoria
Sat 9/19
8:29 am-6:55 am
2 stops31h 26m
Sydney Kingsford Smith
Sat 9/26
9:30 am-10:58 pm
2 stops28h 28m
$1,462
PeoriaSydney
PIA Greater Peoria - SYD Sydney Kingsford Smith
PIASYD
Greater Peoria
Wed 11/11
4:43 pm-6:55 am
1 stop21h 12m
Sydney Kingsford Smith
Sun 11/15
6:05 am-3:48 pm
2 stops26h 43m
$1,537
ChicagoSydney
MDW Chicago Midway - SYD Sydney Kingsford Smith
MDWSYD
Chicago Midway
Tue 9/1
10:54 am-6:50 am
2 stops28h 56m
Sydney Kingsford Smith
Tue 9/8
9:15 am-6:19 pm
2 stops24h 04m
$1,616
Showing 1-10 of 56 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.
STL-SYD
MDW-SYD
ORD-SYD
PIA-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
STL-SYD
MDW-SYD
ORD-SYD
PIA-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 $1,281). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,726). 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 below average for this route at the moment.
Illinois to Sydney flights typically cost between $1,259 and $1,565 in October.The cheapest round-trip price found within the last 5 days was $1,223 on Air New Zealand (Oct 21-Nov 9).
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 82 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
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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 August 7, 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 August 7, 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 2,558,603 searches. Data last updated August 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$261 | Average$1,131 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$900 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,364 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$844 | Average$1,723 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,561 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$898 | Average$1,282 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,209 | Average$1,288 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,308 | Average$1,661 | FlexibilityNo cancel fee | On-time78% |