$455+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Mar 4 — Mar 111
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 February 2, 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 February 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/251:15 pm
SYD
- ORD
2 stops31h 35m
Multiple Airlines
Sat 5/96:00 am
ORD
- SYD
1 stop34h 30m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,006
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/172:00 pm
SYD
- ORD
2 stops30h 49m
Multiple Airlines
Tue 3/247:31 pm
ORD
- SYD
1 stop43h 54m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,017
This American Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:20 am
SYD
- STL
2 stops28h 38m
American Airlines
Mon 2/2311:46 am
STL
- SYD
2 stops28h 14m
American Airlines
Deal found 1/31![American Airlines logo]()
$1,044
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 3/1811:50 am
SYD
- STL
1 stop20h 15m
United Airlines
Wed 3/2510:00 am
STL
- SYD
2 stops28h 20m
United Airlines
Deal found 2/1![United Airlines logo]()
$1,062
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 3/1611:20 am
SYD
- STL
2 stops24h 09m
American Airlines
Mon 3/234:13 pm
STL
- SYD
2 stops24h 47m
American Airlines
Deal found 1/30![American Airlines logo]()
$1,063
This Air Canada deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/1910:25 am
SYD
- ORD
2 stops37h 35m
Air Canada
Tue 4/218:42 am
ORD
- SYD
2 stops31h 38m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,063
This Qantas Airways deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 3/161:05 pm
SYD
- STL
1 stop20h 08m
Multiple Airlines
Mon 3/234:13 pm
STL
- SYD
1 stop22h 42m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$1,064
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/1611:50 am
SYD
- STL
1 stop26h 26m
United Airlines
Mon 3/234:47 pm
STL
- SYD
1 stop22h 13m
United Airlines
Deal found 1/31![United Airlines logo]()
$1,066
This Air Canada deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/1710:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Tue 3/2410:35 am
ORD
- SYD
2 stops30h 00m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,068
This United Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/1911:50 am
SYD
- STL
1 stop20h 48m
United Airlines
Mon 2/235:25 pm
STL
- SYD
1 stop22h 50m
United Airlines
Deal found 1/29![United Airlines logo]()
$1,075
This BYOjet deal was found by Cheapflights users on 2/1. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1110:20 am
SYD
- ORD
2 stops22h 25m
Air Canada
Mon 3/303:40 pm
ORD
- SYD
1 stop24h 40m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,087
This Delta deal was found by Cheapflights users on 2/1. 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 3/119:40 am
SYD
- MDW
2 stops23h 42m
Delta
Mon 3/3010:45 am
MDW
- SYD
2 stops29h 05m
Delta
Deal found 2/1![Delta logo]()
$1,202
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 February 2, 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 February 2, 2026.
This American Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:20 am
SYD
- STL
2 stops28h 38m
American Airlines
Mon 2/2311:46 am
STL
- SYD
2 stops28h 14m
American Airlines
Deal found 1/31![American Airlines logo]()
$1,044
This Delta deal was found by Cheapflights users on 2/1. 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 3/189:40 am
SYD
- STL
2 stops27h 26m
Delta
Wed 3/257:15 am
STL
- SYD
2 stops32h 10m
Delta
Deal found 2/1![Delta logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/1911:50 am
SYD
- STL
1 stop20h 48m
United Airlines
Mon 2/2310:10 am
STL
- SYD
1 stop27h 50m
United Airlines
Deal found 1/31![United Airlines logo]()
$1,062
This Qantas Airways deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 3/161:05 pm
SYD
- STL
1 stop20h 08m
Multiple Airlines
Mon 3/234:13 pm
STL
- SYD
1 stop22h 42m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$1,064
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2111:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Sun 3/83:35 pm
ORD
- SYD
1 stop25h 00m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,152
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 3/1812:10 pm
SYD
- STL
1 stop26h 15m
United Airlines
Wed 3/254:47 pm
STL
- SYD
1 stop22h 13m
United Airlines
Deal found 2/1![United Airlines logo]()
$1,062
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 3/1611:20 am
SYD
- STL
1 stop28h 38m
American Airlines
Mon 3/232:31 pm
STL
- SYD
2 stops26h 29m
American Airlines
Deal found 1/30![American Airlines logo]()
$1,063
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/282:00 pm
SYD
- ORD
2 stops30h 49m
Multiple Airlines
Sun 4/57:45 pm
ORD
- SYD
1 stop44h 45m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,153
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Mon 2/2311:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Sun 3/83:35 pm
ORD
- SYD
1 stop25h 00m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,191
This Delta deal was found by Cheapflights users on 2/1. 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.
Thu 3/199:40 am
SYD
- MDW
2 stops24h 14m
Delta
Tue 4/2112:53 pm
MDW
- SYD
2 stops26h 57m
Delta
Deal found 2/1![Delta logo]()
$1,202
This Aunt Betty deal was found by Cheapflights users on 2/1. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/219:00 am
SYD
- ORD
2 stops22h 41m
Multiple Airlines
Sun 3/84:47 pm
ORD
- SYD
2 stops47h 48m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$1,158
This Delta deal was found by Cheapflights users on 2/1. 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 3/119:40 am
SYD
- MDW
2 stops23h 42m
Delta
Mon 3/3010:45 am
MDW
- SYD
2 stops29h 05m
Delta
Deal found 2/1![Delta logo]()
$1,202
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Thu 3/1910:25 am
SYD
- ORD
3 stops37h 35m
Air Canada
Tue 4/217:13 am
ORD
- SYD
3 stops33h 07m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,232
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:10 am
SYD
- ORD
1 stop23h 31m
American Airlines
Sat 6/610:35 pm
ORD
- SYD
1 stop41h 30m
American Airlines
Deal found 2/1![American Airlines logo]()
$1,263
This Travelocity deal was found by Cheapflights users on 2/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/229:30 pm
SYD
- ORD
2 stops34h 11m
Multiple Airlines
Fri 3/63:35 pm
ORD
- SYD
1 stop25h 00m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$1,218
This Booking.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/111:20 am
SYD
- ORD
2 stops46h 25m
Air Canada
Sun 3/84:47 pm
ORD
- SYD
2 stops47h 48m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,236
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:10 am
SYD
- ORD
1 stop20h 06m
American Airlines
Sun 5/104:30 pm
ORD
- SYD
1 stop23h 35m
American Airlines
Deal found 2/1![American Airlines logo]()
$1,287
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/255:50 pm
SYD
- ORD
1 stop27h 00m
Multiple Airlines
Sat 5/99:20 pm
ORD
- SYD
1 stop43h 10m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,265
This Delta deal was found by Cheapflights users on 2/1. 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 4/249:15 am
SYD
- MDW
2 stops24h 21m
Delta
Sun 5/101:59 pm
MDW
- SYD
2 stops25h 51m
Delta
Deal found 2/1![Delta logo]()
$1,492
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 4/259:15 am
SYD
- MDW
2 stops24h 21m
Delta
Sat 5/91:22 pm
MDW
- SYD
2 stops26h 28m
Delta
Deal found 1/31![Delta logo]()
$1,544
This Delta deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 6/129:15 am
SYD
- MDW
2 stops24h 16m
Delta
Sun 7/122:00 pm
MDW
- SYD
2 stops25h 50m
Delta
Deal found 1/30![Delta logo]()
$1,603
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/179:40 am
SYD
- MDW
2 stops23h 42m
Delta
Tue 3/2412:47 pm
MDW
- SYD
2 stops25h 18m
Delta
Deal found 1/31![Delta logo]()
$1,655
This Delta deal was found by Cheapflights users on 2/1. 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 7/109:15 am
SYD
- MDW
2 stops24h 16m
Delta
Sun 7/262:00 pm
MDW
- SYD
2 stops25h 50m
Delta
Deal found 2/1![Delta logo]()
$1,677
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/110:40 am
SYD
- MDW
2 stops24h 05m
Delta
Sun 3/82:05 pm
MDW
- SYD
2 stops25h 20m
Delta
Deal found 1/31![Delta logo]()
$1,701
This Delta deal was found by Cheapflights users on 2/2. 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.
Mon 6/229:15 am
SYD
- MDW
2 stops24h 16m
Delta
Sun 7/199:20 am
MDW
- SYD
2 stops30h 30m
Delta
Deal found 2/2![Delta logo]()
$1,753
Last-minute flights from Sydney to IllinoisDiscover last-minute flight deals from Sydney to Illinois. Data last updated February 2, 2026 and is based on user searches.
Discover last-minute flight deals from Sydney to Illinois. Data last updated February 2, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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.
Wed 2/411:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Fri 2/612:50 pm
ORD
- SYD
2 stops51h 45m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,209
This Air Canada deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/1411:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Tue 2/177:15 am
ORD
- SYD
2 stops33h 20m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,183
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/142:15 pm
SYD
- MDW
2 stops25h 16m
Delta
Tue 2/1712:45 pm
MDW
- SYD
2 stops26h 45m
Delta
Deal found 1/31![Delta logo]()
$1,813
This American Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:20 am
SYD
- STL
2 stops28h 38m
American Airlines
Mon 2/2311:46 am
STL
- SYD
2 stops28h 14m
American Airlines
Deal found 1/31![American Airlines logo]()
$1,044
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/1911:50 am
SYD
- STL
1 stop20h 48m
United Airlines
Mon 2/2310:10 am
STL
- SYD
1 stop27h 50m
United Airlines
Deal found 1/31![United Airlines logo]()
$1,062
This Gotogate deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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.
Fri 2/2011:20 am
SYD
- ORD
2 stops27h 44m
Air Canada
Sat 3/73:35 pm
ORD
- SYD
1 stop25h 00m
Air Canada
Deal found 1/31![Air Canada logo]()
$1,158
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2111:20 am
SYD
- ORD
1 stop20h 21m
Air Canada
Sun 3/83:35 pm
ORD
- SYD
1 stop25h 00m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,152
This Delta deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 2/212:15 pm
SYD
- MDW
2 stops25h 16m
Delta
Sat 2/281:28 pm
MDW
- SYD
2 stops26h 02m
Delta
Deal found 1/31![Delta logo]()
$1,865
This Travelocity deal was found by Cheapflights users on 2/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/229:30 pm
SYD
- ORD
2 stops34h 11m
Multiple Airlines
Fri 3/63:35 pm
ORD
- SYD
1 stop25h 00m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$1,218
This Delta deal was found by Cheapflights users on 2/1. 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.
Sun 2/2210:40 am
SYD
- MDW
2 stops24h 05m
Delta
Fri 3/61:29 pm
MDW
- SYD
2 stops26h 01m
Delta
Deal found 2/1![Delta logo]()
$2,285
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:20 am
SYD
- ORD
2 stops49h 50m
Air Canada
Sun 3/88:40 pm
ORD
- SYD
2 stops43h 55m
Air Canada
Deal found 2/1![Air Canada logo]()
$1,161
This Delta deal was found by Cheapflights users on 2/1. 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 2/232:15 pm
SYD
- MDW
2 stops25h 16m
Delta
Sun 3/812:47 pm
MDW
- SYD
2 stops26h 38m
Delta
Deal found 2/1![Delta logo]()
$1,964
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 February 2, 2026.
Search for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated February 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 3/72:00 pm
SYD
- ORD
2 stops31h 49m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 3/102:00 pm
SYD
- ORD
2 stops30h 49m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$466
This Trip.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” 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 5/116:00 am
SYD
- ORD
2 stops38h 50m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$476
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/62:00 pm
SYD
- ORD
2 stops31h 49m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 6/31:20 pm
SYD
- ORD
3 stops31h 11m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$504
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 3/252:00 pm
SYD
- ORD
2 stops30h 49m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$510
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Tue 3/242:00 pm
SYD
- ORD
3 stops34h 23m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$515
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Mon 3/232:00 pm
SYD
- ORD
3 stops34h 50m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 7/151:15 pm
SYD
- ORD
2 stops41h 19m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$550
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 3/72:00 pm
SYD
- MDW
2 stops23h 21m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$612
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 4/157:45 pm
SYD
- MDW
3 stops41h 36m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$686
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/69:20 pm
SYD
- MDW
3 stops40h 01m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$702
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 February 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,006 (Kiwi.com) |
One-way from | $455 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,012 |
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 February 2, 2026.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.
Fly from
Sydney
Fly to
Illinois
Route
Depart
Return
Price
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Thu 2/19
11:20 am-10:58 pm
2 stops28h 38m
Lambert-St Louis
Mon 2/23
11:46 am-9:00 am
2 stops28h 14m
$1,044
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Wed 3/18
9:40 am-9:06 pm
2 stops27h 26m
Lambert-St Louis
Wed 3/25
7:15 am-7:25 am
2 stops32h 10m
$1,062
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Thu 2/19
11:50 am-3:38 pm
1 stop20h 48m
Lambert-St Louis
Mon 2/23
10:10 am-7:00 am
1 stop27h 50m
$1,062
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Wed 3/18
12:10 pm-10:25 pm
1 stop26h 15m
Lambert-St Louis
Wed 3/25
4:47 pm-7:00 am
1 stop22h 13m
$1,062
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Mon 3/16
11:20 am-11:58 pm
1 stop28h 38m
Lambert-St Louis
Mon 3/23
2:31 pm-9:00 am
2 stops26h 29m
$1,063
SydneySt. Louis
SYD - STL
SYDSTL
Sydney Kingsford Smith
Mon 3/16
1:05 pm-5:13 pm
1 stop20h 08m
Lambert-St Louis
Mon 3/23
4:13 pm-6:55 am
1 stop22h 42m
$1,064
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 2/21
11:20 am-2:41 pm
1 stop20h 21m
Chicago O'Hare Intl
Sun 3/8
3:35 pm-8:35 am
1 stop25h 00m
$1,152
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 3/28
2:00 pm-4:49 am
2 stops30h 49m
Chicago O'Hare Intl
Sun 4/5
7:45 pm-7:30 am
1 stop44h 45m
$1,153
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 2/21
9:00 am-2:41 pm
2 stops22h 41m
Chicago O'Hare Intl
Sun 3/8
4:47 pm-8:35 am
2 stops47h 48m
$1,158
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Mon 2/23
11:20 am-2:41 pm
1 stop20h 21m
Chicago O'Hare Intl
Sun 3/8
3:35 pm-8:35 am
1 stop25h 00m
$1,191
Showing 1-10 of 42 results
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 $620). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,034). 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.
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 February 2, 2026.
Get a feel of what it's like to fly with Qantas Airways, United Airlines, and Air Canada 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.
Boarding
7.7
Entertainment
7.2
Crew
8.2
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Jan 2026
WYA - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.2
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Jan 2026
WYA - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.2
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Jan 2026
WYA - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.2
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Jan 2026
WYA - ADL
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 for Sydney to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Sydney to Illinois
Discover the top airline 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 February 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$646 | Average$970 | FlexibilityNo cancel fee | On-time74% |