$433+ Cheap flights from O'Hare Intl (ORD) 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Apr 9 — Apr 161
Round-trip
1 adult, Economy
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Cheapest flights from O'Hare Intl to SydneyExplore the most affordable flight options available from O'Hare Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.
Explore the most affordable flight options available from O'Hare Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.
This Trip.com deal was found by Cheapflights users on 3/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:15 am
ORD
- SYD
2 stops39h 50m
Multiple Airlines
Mon 4/271:15 pm
SYD
- ORD
2 stops25h 12m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$966
This Trip.com deal was found by Cheapflights users on 3/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:30 am
ORD
- SYD
2 stops37h 20m
Multiple Airlines
Tue 5/126:00 am
SYD
- ORD
2 stops32h 27m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$975
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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 6/212:44 pm
ORD
- SYD
2 stops32h 06m
Multiple Airlines
Sun 6/76:00 am
SYD
- ORD
2 stops38h 23m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,000
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Thu 4/236:00 am
SYD
- ORD
2 stops38h 35m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$1,014
This Trip.com deal was found by Cheapflights users on 3/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:44 pm
ORD
- SYD
2 stops32h 06m
Multiple Airlines
Tue 5/266:00 am
SYD
- ORD
2 stops38h 23m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$1,026
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:44 pm
ORD
- SYD
2 stops32h 06m
Multiple Airlines
Mon 6/11:15 pm
SYD
- ORD
2 stops31h 08m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$1,031
This Mytrip deal was found by Cheapflights users on 3/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:30 am
ORD
- SYD
2 stops34h 15m
Multiple Airlines
Tue 4/2811:55 am
SYD
- ORD
2 stops26h 32m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$1,038
This Trip.com deal was found by Cheapflights users on 3/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/265:15 am
ORD
- SYD
2 stops39h 35m
Multiple Airlines
Sat 5/91:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$1,043
This Mytrip deal was found by Cheapflights users on 3/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/262:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Sun 5/101:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$1,075
This Mytrip deal was found by Cheapflights users on 3/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:00 pm
ORD
- SYD
2 stops31h 05m
Multiple Airlines
Sun 5/101:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$1,080
Best flights from O'Hare Intl to SydneyDiscover carefully curated flight deals from O'Hare Intl to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
Discover carefully curated flight deals from O'Hare Intl to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
This BusinessClass deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/43:40 pm
ORD
- SYD
1 stop24h 40m
Multiple Airlines
Mon 8/39:20 am
SYD
- ORD
1 stop39h 30m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,272
This Qantas Airways deal was found by Cheapflights users on 3/5. 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 3/252:58 pm
ORD
- SYD
2 stops31h 27m
Qantas Airways
Mon 4/69:10 am
SYD
- ORD
1 stop29h 37m
Qantas Airways
Deal found 3/5![Qantas Airways logo]()
$1,494
This Delta deal was found by Cheapflights users on 3/6. 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 3/2312:15 pm
ORD
- SYD
2 stops27h 10m
Delta
Sun 4/269:15 am
SYD
- ORD
2 stops24h 37m
Delta
Deal found 3/6![Delta logo]()
$1,513
This United Airlines deal was found by Cheapflights users on 3/5. 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 3/257:35 am
ORD
- SYD
1 stop31h 25m
United Airlines
Wed 4/110:30 am
SYD
- ORD
2 stops25h 44m
United Airlines
Deal found 3/5![United Airlines logo]()
$1,839
This Japan Airlines deal was found by Cheapflights users on 3/6. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/262:10 pm
ORD
- SYD
1 stop25h 10m
Japan Airlines
Sun 5/108:55 am
SYD
- ORD
2 stops38h 36m
Japan Airlines
Deal found 3/6![Japan Airlines logo]()
$2,128
This KLM deal was found by Cheapflights users on 3/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:20 pm
ORD
- SYD
3 stops47h 10m
KLM
Tue 5/1910:10 am
SYD
- ORD
3 stops43h 20m
KLM
Deal found 3/8![KLM logo]()
$2,477
This Delta deal was found by Cheapflights users on 3/6. 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 3/183:59 pm
ORD
- SYD
2 stops23h 26m
Delta
Sun 4/269:15 am
SYD
- ORD
2 stops24h 37m
Delta
Deal found 3/6![Delta logo]()
$1,513
This Qantas Airways deal was found by Cheapflights users on 3/6. 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.
Sun 4/264:30 pm
ORD
- SYD
1 stop23h 35m
Qantas Airways
Sun 5/106:25 am
SYD
- ORD
2 stops26h 16m
Qantas Airways
Deal found 3/6![Qantas Airways logo]()
$1,555
This Qantas Airways deal was found by Cheapflights users on 3/7. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/202:58 pm
ORD
- SYD
2 stops31h 27m
Qantas Airways
Sat 5/29:10 am
SYD
- ORD
1 stop22h 45m
Qantas Airways
Deal found 3/7![Qantas Airways logo]()
$1,689
This Qantas Airways deal was found by Cheapflights users on 3/7. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1511:31 am
ORD
- SYD
1 stop29h 29m
Qantas Airways
Sat 5/29:10 am
SYD
- ORD
1 stop20h 06m
Qantas Airways
Deal found 3/7![Qantas Airways logo]()
$1,804
This Qantas Airways deal was found by Cheapflights users on 3/5. 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.
Fri 3/207:29 pm
ORD
- SYD
1 stop21h 31m
Qantas Airways
Sun 3/2910:10 am
SYD
- ORD
1 stop20h 43m
Qantas Airways
Deal found 3/5![Qantas Airways logo]()
$2,253
Last-minute flights from O'Hare Intl to SydneyDiscover last-minute flight deals from O'Hare Intl to Sydney. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated March 10, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Thu 4/236:00 am
SYD
- ORD
2 stops38h 35m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$1,014
This Trip.com deal was found by Cheapflights users on 3/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:15 am
ORD
- SYD
2 stops39h 50m
Multiple Airlines
Mon 4/271:15 pm
SYD
- ORD
2 stops25h 12m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$966
This Mytrip deal was found by Cheapflights users on 3/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:30 am
ORD
- SYD
2 stops34h 15m
Multiple Airlines
Tue 4/2811:55 am
SYD
- ORD
2 stops26h 32m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$1,038
This Trip.com deal was found by Cheapflights users on 3/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:30 am
ORD
- SYD
2 stops34h 15m
Multiple Airlines
Sat 5/29:55 am
SYD
- ORD
2 stops28h 32m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$1,093
This Mytrip deal was found by Cheapflights users on 3/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/232:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Wed 5/61:20 pm
SYD
- ORD
2 stops31h 15m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$1,121
This Mytrip deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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.
Thu 4/232:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Thu 4/301:15 pm
SYD
- ORD
2 stops25h 12m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,131
This Trip.com deal was found by Cheapflights users on 3/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/265:15 am
ORD
- SYD
2 stops39h 35m
Multiple Airlines
Sat 5/91:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$1,043
This Mytrip deal was found by Cheapflights users on 3/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/262:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Sun 5/101:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$1,075
This lol.travel deal was found by Cheapflights users on 3/7. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:40 pm
ORD
- SYD
1 stop24h 40m
Air Canada
Sun 5/109:20 am
SYD
- ORD
1 stop20h 25m
Air Canada
Deal found 3/7![Air Canada logo]()
$1,153
This Mytrip deal was found by Cheapflights users on 3/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:00 pm
ORD
- SYD
2 stops31h 05m
Multiple Airlines
Sun 5/101:15 pm
SYD
- ORD
2 stops31h 20m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$1,080
One-way flights from O'Hare Intl to SydneySearch for one-way flight options from O'Hare Intl to Sydney. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
Search for one-way flight options from O'Hare Intl to Sydney. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Trip.com deal was found by Cheapflights users on 3/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:30 am
ORD
- SYD
2 stops47h 40m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$433
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:11 am
ORD
- SYD
2 stops39h 39m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$446
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:55 pm
ORD
- SYD
2 stops27h 55m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$464
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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 6/112:44 pm
ORD
- SYD
2 stops42h 26m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:11 am
ORD
- SYD
2 stops39h 39m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” 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 4/115:19 pm
ORD
- SYD
2 stops27h 31m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$471
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:30 am
ORD
- SYD
2 stops37h 20m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:51 am
ORD
- SYD
2 stops36h 59m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:30 am
ORD
- SYD
2 stops37h 20m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$475
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/152:00 pm
ORD
- SYD
2 stops30h 50m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$476
Find flight deals from O'Hare Intl to Sydney
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $966 (Trip.com) |
One-way from | $433 (Trip.com) |
Popular in | December |
Cheapest in | August |
Average price | $1,192 |
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl 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 March 10, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Thu 6/4
3:40 pm-7:20 am
1 stop24h 40m
Sydney Kingsford Smith
Mon 8/3
9:20 am-9:50 am
1 stop39h 30m
$1,272
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 3/25
2:58 pm-2:25 pm
2 stops31h 27m
Sydney Kingsford Smith
Mon 4/6
9:10 am-11:47 pm
1 stop29h 37m
$1,494
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 3/23
12:15 pm-7:25 am
2 stops27h 10m
Sydney Kingsford Smith
Sun 4/26
9:15 am-6:52 pm
2 stops24h 37m
$1,513
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 3/18
3:59 pm-7:25 am
2 stops23h 26m
Sydney Kingsford Smith
Sun 4/26
9:15 am-6:52 pm
2 stops24h 37m
$1,513
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 4/26
4:30 pm-7:05 am
1 stop23h 35m
Sydney Kingsford Smith
Sun 5/10
6:25 am-5:41 pm
2 stops26h 16m
$1,555
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Fri 3/20
2:58 pm-2:25 pm
2 stops31h 27m
Sydney Kingsford Smith
Sat 5/2
9:10 am-4:55 pm
1 stop22h 45m
$1,689
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 3/15
11:31 am-9:00 am
1 stop29h 29m
Sydney Kingsford Smith
Sat 5/2
9:10 am-2:16 pm
1 stop20h 06m
$1,804
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 3/25
7:35 am-7:00 am
1 stop31h 25m
Sydney Kingsford Smith
Wed 4/1
10:30 am-8:14 pm
2 stops25h 44m
$1,839
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 4/26
2:10 pm-6:20 am
1 stop25h 10m
Sydney Kingsford Smith
Sun 5/10
8:55 am-8:31 am
2 stops38h 36m
$2,128
Quickest round-trip
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Fri 3/20
7:29 pm-9:00 am
1 stop21h 31m
Sydney Kingsford Smith
Sun 3/29
10:10 am-2:53 pm
1 stop20h 43m
$2,253
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl to Sydney
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Sydney in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Sydney flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from O'Hare Intl to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from O'Hare Intl with our price prediction graph.
ORD-SYD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago O'Hare Intl Airport to Sydney
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How far ahead should I book a flight from Chicago O'Hare Intl Airport to Sydney?
Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Sydney. Price data was last updated on March 6, 2026.
To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Sydney, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Sydney?
Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $198). Flying from Chicago O'Hare Intl Airport to Sydney in October is currently the most expensive (average of $898). 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.
What’s the top layover airport for flights from Chicago O'Hare Intl Airport to Sydney?
Share of 1-stop round-trip flights from Chicago O'Hare Intl Airport to Sydney chosen by Cheapflights users in the past 12 months, using the same layover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 36% of 1-stop itineraries from Chicago O'Hare Intl Airport to Sydney on Cheapflights.
What’s the cheapest layover airport for flights from Chicago O'Hare Intl Airport to Sydney?
Average round-trip fare for 1-stop flights from Chicago O'Hare Intl Airport to Sydney, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Nadi (NAN) is the most affordable 1-stop option, with an average round-trip price of $845.
What’s the fastest layover option from Chicago O'Hare Intl Airport to Sydney?
Shortest average travel time for 1-stop one-way flights from Chicago O'Hare Intl Airport to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 21h 50m.
Which airport typically offers the quickest layover for flights from Chicago O'Hare Intl Airport to Sydney?
Average layover duration for 1-stop one-way flights from Chicago O'Hare Intl Airport to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 32m.
Reviews of airlines servicing Sydney
Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated March 10, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from Chicago O'Hare Intl Airport to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Crew
8.5
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl 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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O'Hare Intl and Sydney flights
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Top 8 airlines flying from O'Hare Intl to Sydney
Discover the top 8 airlines that operate flights from O'Hare Intl 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 March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$710 | Average$1,439 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$795 | Average$1,181 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$813 | Average$1,349 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$870 | Average$1,515 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$898 | Average$1,242 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$948 | Average$1,034 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$1,177 | Average$1,237 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,282 | Average$1,461 | FlexibilityNo cancel fee | On-time78% |