$489+ Cheap flights from Sydney (SYD) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Sep 7 — Sep 141
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Sydney to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Sydney to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Sydney to IllinoisExplore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3011:20 am -
2 stops46h 30m
Mon 2/810:40 am -
2 stops29h 55m
Deal found 8/3![Air Canada logo]()
$936
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 9/91:15 pm -
3 stops37h 02m
Sat 9/1912:17 pm -
3 stops43h 08m
Deal found 8/4![Multiple Airlines logo]()
$939
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:20 am -
2 stops27h 45m
Tue 9/223:40 pm -
1 stop24h 40m
Deal found 8/3![Air Canada logo]()
$940
This Air Canada 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:20 am -
2 stops37h 40m
Tue 12/11:55 pm -
2 stops26h 40m
Deal found 8/4![Air Canada logo]()
$972
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.
Tue 8/259:20 am -
1 stop20h 16m
Wed 9/911:05 am -
2 stops29h 15m
Deal found 8/4![Air Canada logo]()
$986
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:20 am -
2 stops45h 31m
Tue 9/293:40 pm -
1 stop24h 40m
Deal found 8/3![Air Canada logo]()
$990
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.
Tue 8/119:10 am -
2 stops22h 31m
Sun 8/236:36 am -
2 stops33h 29m
Deal found 8/5![American Airlines logo]()
$997
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:20 am -
2 stops25h 28m
Sat 9/199:18 pm -
2 stops43h 02m
Deal found 8/5![Air Canada logo]()
$1,008
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.
Mon 8/1010:20 am -
2 stops27h 25m
Sun 8/239:00 am -
2 stops31h 00m
Deal found 8/5![United Airlines logo]()
$1,015
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:20 am -
2 stops22h 37m
Mon 11/168:50 am -
2 stops31h 45m
Deal found 8/3![Air Canada logo]()
$1,025
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.
Mon 8/109:10 am -
2 stops26h 16m
Fri 8/283:32 pm -
2 stops24h 33m
Deal found 8/5![American Airlines logo]()
$1,047
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.
Thu 11/129:20 am -
1 stop21h 53m
Mon 11/165:55 pm -
1 stop44h 05m
Deal found 8/3![United Airlines logo]()
$1,061
Best flights from Sydney to IllinoisDiscover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
Discover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3011:20 am -
2 stops46h 30m
Mon 2/810:40 am -
2 stops29h 55m
Deal found 8/3![Air Canada logo]()
$936
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.
Thu 11/129:20 am -
1 stop21h 53m
Mon 11/165:55 pm -
1 stop44h 05m
Deal found 8/3![United Airlines logo]()
$1,061
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:15 am -
2 stops26h 20m
Sat 9/198:00 am -
2 stops31h 50m
Deal found 8/6![Delta logo]()
$1,279
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:00 pm -
1 stop26h 42m
Sat 11/146:02 am -
1 stop31h 23m
Deal found 8/5![Qantas Airways logo]()
$1,338
This Air New Zealand 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:55 am -
3 stops27h 49m
Sat 11/141:40 pm -
3 stops27h 55m
Deal found 8/5![Multiple Airlines logo]()
$1,432
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.
Mon 9/149:10 am -
1 stop25h 49m
Tue 9/293:20 pm -
1 stop24h 45m
Deal found 8/3![American Airlines logo]()
$1,510
This Cathay Pacific 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:05 pm -
1 stop38h 50m
Fri 10/94:15 pm -
2 stops47h 30m
Deal found 8/7![Cathay Pacific logo]()
$1,582
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:20 am -
1 stop20h 23m
Tue 9/223:40 pm -
1 stop24h 40m
Deal found 8/3![Air Canada logo]()
$954
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.
Mon 9/2110:20 am -
2 stops21h 14m
Wed 9/301:29 pm -
2 stops26h 31m
Deal found 8/4![United Airlines logo]()
$1,078
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:20 am -
3 stops28h 55m
Mon 11/169:40 am -
3 stops30h 55m
Deal found 8/3![Air Canada logo]()
$1,041
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:20 am -
2 stops44h 32m
Thu 9/243:40 pm -
1 stop24h 40m
Deal found 8/4![Air Canada logo]()
$1,053
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.
Wed 10/2111:20 am -
1 stop23h 23m
Sat 11/144:39 pm -
2 stops45h 21m
Deal found 8/5![United Airlines logo]()
$1,297
This Air New Zealand 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2011:50 am -
3 stops26h 09m
Sat 2/131:30 pm -
3 stops26h 05m
Deal found 8/6![Multiple Airlines logo]()
$1,436
This Cathay Pacific 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:55 pm -
2 stops34h 25m
Fri 9/184:15 pm -
1 stop46h 55m
Deal found 8/5![Multiple Airlines logo]()
$1,493
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 11/310:40 am -
2 stops23h 07m
Tue 11/1712:30 pm -
2 stops27h 00m
Deal found 8/7![Delta logo]()
$1,722
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:40 am -
2 stops22h 59m
Mon 11/301:22 pm -
2 stops26h 08m
Deal found 8/6![Delta logo]()
$1,725
This Air New Zealand 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:55 am -
3 stops26h 45m
Sat 9/193:13 pm -
2 stops28h 27m
Deal found 8/6![Multiple Airlines logo]()
$1,575
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:40 am -
2 stops24h 24m
Tue 11/241:22 pm -
2 stops26h 08m
Deal found 8/6![Delta logo]()
$1,725
This Air New Zealand deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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.
Wed 9/29:55 am -
2 stops27h 32m
Thu 9/31:36 pm -
3 stops28h 09m
Deal found 8/8![Multiple Airlines logo]()
$1,576
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:40 am -
2 stops22h 59m
Thu 11/2612:30 pm -
2 stops27h 00m
Deal found 8/6![Delta logo]()
$1,751
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:45 pm -
3 stops24h 35m
Fri 10/97:16 pm -
2 stops31h 34m
Deal found 8/4![Multiple Airlines logo]()
$1,749
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.
Tue 9/89:15 am -
2 stops24h 04m
Tue 9/222:00 pm -
2 stops25h 50m
Deal found 8/5![Delta logo]()
$1,931
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:45 pm -
3 stops24h 35m
Thu 9/247:00 pm -
2 stops32h 50m
Deal found 8/4![Multiple Airlines logo]()
$1,820
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 9/229:15 am -
2 stops24h 04m
Tue 9/291:19 pm -
2 stops26h 31m
Deal found 8/8![Delta logo]()
$1,936
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 9/89:15 am -
2 stops24h 04m
Fri 9/181:19 pm -
2 stops26h 31m
Deal found 8/7![Delta logo]()
$1,970
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 9/69:15 am -
2 stops21h 42m
Sat 9/199:29 am -
2 stops30h 21m
Deal found 8/8![Delta logo]()
$2,009
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.
Sat 9/199:15 am -
2 stops28h 29m
Sun 9/279:29 am -
2 stops30h 21m
Deal found 8/5![Delta logo]()
$2,034
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.
Thu 10/19:15 am -
2 stops24h 04m
Fri 10/99:29 am -
2 stops30h 21m
Deal found 8/7![Delta logo]()
$2,177
Last-minute flights from Sydney to IllinoisDiscover last-minute flight deals from Sydney to Illinois. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from Sydney to Illinois. Data last updated August 8, 2026 and is based on user searches.
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 8/910:20 am -
1 stop22h 57m
Sun 8/239:00 am -
2 stops31h 00m
Deal found 8/5![United Airlines logo]()
$1,065
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.
Mon 8/1010:20 am -
2 stops27h 25m
Sun 8/239:00 am -
2 stops31h 00m
Deal found 8/5![United Airlines logo]()
$1,015
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.
Mon 8/109:10 am -
2 stops26h 16m
Fri 8/283:32 pm -
2 stops24h 33m
Deal found 8/5![American Airlines logo]()
$1,047
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.
Tue 8/119:10 am -
2 stops23h 27m
Sun 8/236:00 am -
1 stop34h 05m
Deal found 8/5![American Airlines logo]()
$997
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.
Tue 8/259:20 am -
1 stop20h 16m
Wed 9/911:05 am -
2 stops29h 15m
Deal found 8/4![Air Canada logo]()
$986
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:20 am -
2 stops27h 45m
Tue 9/223:40 pm -
1 stop24h 40m
Deal found 8/3![Air Canada logo]()
$940
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 9/91:15 pm -
3 stops37h 02m
Sat 9/1912:17 pm -
3 stops43h 08m
Deal found 8/4![Multiple Airlines logo]()
$939
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:20 am -
2 stops25h 28m
Sat 9/199:18 pm -
2 stops43h 02m
Deal found 8/5![Air Canada logo]()
$1,008
This Bravofly 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:10 am -
1 stop29h 20m
Sat 9/196:20 am -
1 stop33h 45m
Deal found 8/4![Qantas Airways logo]()
$1,069
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:20 am -
2 stops45h 31m
Tue 9/293:40 pm -
1 stop24h 40m
Deal found 8/3![Air Canada logo]()
$990
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:20 am -
2 stops44h 32m
Thu 9/243:40 pm -
1 stop24h 40m
Deal found 8/4![Air Canada logo]()
$1,053
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.
Mon 9/2110:20 am -
2 stops21h 14m
Wed 9/301:29 pm -
2 stops26h 31m
Deal found 8/4![United Airlines logo]()
$1,078
One-way flights from Sydney to IllinoisSearch for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
Search for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
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.
Tue 10/202:15 pm -
3 stops31h 27m
Deal found 8/3![Multiple Airlines logo]()
$489
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.
Sun 10/252:00 pm -
3 stops50h 33m
Deal found 8/3![Multiple Airlines logo]()
$498
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 11/102:00 pm -
3 stops45h 29m
Deal found 8/6![Multiple Airlines logo]()
$512
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.
Fri 9/41:15 pm -
3 stops43h 35m
Deal found 8/4![Multiple Airlines logo]()
$524
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.
Mon 11/22:00 pm -
3 stops32h 40m
Deal found 8/7![Multiple Airlines logo]()
$536
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.
Sat 9/57:20 am -
3 stops48h 11m
Deal found 8/4![Multiple Airlines logo]()
$541
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 10/212:15 pm -
3 stops44h 05m
Deal found 8/4![Multiple Airlines logo]()
$552
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.
Mon 11/22:00 pm -
3 stops37h 58m
Deal found 8/7![Multiple Airlines logo]()
$572
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 11/102:00 pm -
3 stops37h 58m
Deal found 8/6![Multiple Airlines logo]()
$591
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 9/41:15 pm -
3 stops36h 35m
Deal found 8/8![Multiple Airlines logo]()
$627
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:20 pm -
1 stop31h 35m
Deal found 8/6![Cathay Pacific logo]()
$650
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:20 pm -
1 stop31h 35m
Deal found 8/3![Cathay Pacific logo]()
$672
Find flight deals from Sydney to Illinois
Keep the following information in mind while searching for Sydney to Illinois flight deals. Data was last updated August 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $936 (Air Canada) |
One-way from | $489 (Kiwi.com) |
Popular in | July |
Cheapest in | August |
Average price | $1,080 |
Cheapflights Fare Finder
Customize your flight search to find flights from Sydney to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 8, 2026.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Mon 11/30
11:20 am-4:50 pm
2 stops46h 30m
Chicago O'Hare Intl
Mon 2/8
10:40 am-9:35 am
2 stops29h 55m
$936
Quickest round-trip
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Tue 9/8
9:20 am-2:43 pm
1 stop20h 23m
Chicago O'Hare Intl
Tue 9/22
3:40 pm-7:20 am
1 stop24h 40m
$954
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Thu 11/12
11:20 am-11:15 pm
3 stops28h 55m
Lambert-St Louis
Mon 11/16
9:40 am-9:35 am
3 stops30h 55m
$1,041
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 9/17
9:20 am-2:52 pm
2 stops44h 32m
Chicago O'Hare Intl
Thu 9/24
3:40 pm-7:20 am
1 stop24h 40m
$1,053
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Thu 11/12
9:20 am-2:13 pm
1 stop21h 53m
Lambert-St Louis
Mon 11/16
5:55 pm-7:00 am
1 stop44h 05m
$1,061
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Mon 9/21
10:20 am-4:34 pm
2 stops21h 14m
Lambert-St Louis
Wed 9/30
1:29 pm-7:00 am
2 stops26h 31m
$1,078
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Wed 9/9
9:15 am-8:35 pm
2 stops26h 20m
Lambert-St Louis
Sat 9/19
8:00 am-6:50 am
2 stops31h 50m
$1,279
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Wed 10/21
11:20 am-6:43 pm
1 stop23h 23m
Lambert-St Louis
Sat 11/14
4:39 pm-7:00 am
2 stops45h 21m
$1,297
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Wed 10/21
1:00 pm-11:42 pm
1 stop26h 42m
Lambert-St Louis
Sat 11/14
6:02 am-6:25 am
1 stop31h 23m
$1,338
SydneySt. Louis
SYD Sydney Kingsford Smith - STL Lambert-St Louis
SYDSTL
Sydney Kingsford Smith
Wed 10/21
11:55 am-11:44 pm
3 stops27h 49m
Lambert-St Louis
Sat 11/14
1:40 pm-10:35 am
3 stops27h 55m
$1,432
Showing 1-10 of 50 resultsSorted by cheapest first
Best time to book a flight from Sydney to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Sydney with our price prediction graph.
SYD-STL
SYD-ORD
SYD-MDW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Sydney to Illinois
SYD-USIL
SYD-STL
SYD-ORD
SYD-MDW
What is the cheapest month to book a flight from Sydney to Illinois?
Currently, September is the cheapest month in which you can book a flight from Sydney to Illinois (average of $1,014). Flying from Sydney to Illinois in July is currently the most expensive (average of $1,401). 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 Sydney to Illinois?
Airfare is below average for this route at the moment.
Sydney to Illinois flights typically cost between $998 and $1,633 in November.The cheapest round-trip price found within the last 5 days was $936 on Air Canada (Nov 30-Feb 8).
How far ahead should I book a flight from Sydney to Illinois?
Booking 10 days in advance of your planned departure date is, on average, the best time to get cheap flights from Sydney to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated August 8, 2026.
Get a feel of what it's like to fly with Qantas Airways and United Airlines from Sydney to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Boarding
7.7
Comfort
7.4
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
10.0
ExcellentTania,May 2026
SYD - DFW
Crew
8.1
Boarding
7.7
Comfort
7.4
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
10.0
ExcellentTania,May 2026
SYD - DFW
Crew
8.1
Boarding
7.7
Comfort
7.4
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
10.0
ExcellentTania,May 2026
SYD - DFW
Related info for your journey
Find useful and relevant information for your journey from Sydney to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Sydney to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Sydney to Illinois by cabin class
Find flights from Sydney to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Sydney and Illinois flights
Browse other Sydney and Illinois flight options. Last updated on August 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Sydney to Illinois flights
Consider these flights traveling from Sydney to Illinois.
Top 2 airlines flying from Sydney to Illinois
Discover the top 2 airlines that operate flights from Sydney to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$970 | Average$1,633 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,113 | Average$1,279 | FlexibilityNo cancel fee | On-time69% |