$599+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Aug 22 — Aug 291
Round-trip
1 adult, Economy
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Find cheap flights from O'Hare Intl to Sydney with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from 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 July 23, 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 July 23, 2026.
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:00 am
ORD
- SYD
1 stop30h 30m
Qantas Airways
Tue 9/15:20 pm
SYD
- ORD
2 stops37h 34m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,261
This Qantas Airways deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/217:00 pm
ORD
- SYD
1 stop21h 30m
Multiple Airlines
Fri 8/289:10 am
SYD
- ORD
1 stop20h 44m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$1,266
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:00 am
ORD
- SYD
1 stop30h 05m
Qantas Airways
Sun 8/3011:40 am
SYD
- ORD
2 stops42h 14m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,271
This FlightHub deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:10 pm
ORD
- SYD
2 stops32h 05m
ANA
Mon 11/99:45 pm
SYD
- ORD
1 stop26h 35m
ANA
Deal found 7/18![ANA logo]()
$1,273
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:00 pm
ORD
- SYD
1 stop25h 00m
United Airlines
Fri 8/2810:20 am
SYD
- ORD
2 stops21h 45m
United Airlines
Deal found 7/22![United Airlines logo]()
$1,275
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:15 pm
ORD
- SYD
2 stops24h 40m
Qantas Airways
Fri 11/202:05 pm
SYD
- ORD
1 stop21h 15m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,276
This FlightHub deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/185:45 pm
ORD
- SYD
1 stop34h 25m
ANA
Sat 10/249:45 pm
SYD
- ORD
2 stops47h 35m
ANA
Deal found 7/19![ANA logo]()
$1,278
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:06 pm
ORD
- SYD
1 stop42h 59m
Qantas Airways
Tue 9/19:25 pm
SYD
- ORD
1 stop30h 08m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,281
This oojo deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:08 pm
ORD
- SYD
1 stop20h 57m
Qantas Airways
Mon 8/3112:00 pm
SYD
- ORD
1 stop21h 29m
Qantas Airways
Deal found 7/20![Qantas Airways logo]()
$1,282
This ANA deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:50 pm
ORD
- SYD
2 stops33h 25m
ANA
Sun 11/1512:25 pm
SYD
- ORD
1 stop35h 55m
ANA
Deal found 7/18![ANA logo]()
$1,289
This Justfly.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:00 pm
ORD
- SYD
1 stop21h 05m
Qantas Airways
Sat 9/59:10 am
SYD
- ORD
1 stop25h 50m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,294
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 July 23, 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 July 23, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm
ORD
- SYD
2 stops32h 56m
Multiple Airlines
Fri 9/48:45 pm
SYD
- ORD
3 stops24h 35m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$1,584
This Alaska Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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.
Fri 9/188:00 am
ORD
- SYD
2 stops32h 30m
Alaska Airlines
Wed 9/305:50 pm
SYD
- ORD
3 stops27h 30m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$1,719
This KLM deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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.
Mon 9/144:50 pm
ORD
- SYD
3 stops46h 40m
KLM
Fri 9/182:45 pm
SYD
- ORD
2 stops38h 30m
KLM
Deal found 7/21![KLM logo]()
$3,054
This Alaska Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:54 pm
ORD
- SYD
2 stops32h 56m
Multiple Airlines
Sun 9/68:45 pm
SYD
- ORD
3 stops24h 35m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$1,767
This Singapore Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:40 am
ORD
- SYD
3 stops42h 35m
Singapore Airlines
Mon 8/312:50 pm
SYD
- ORD
3 stops41h 45m
Singapore Airlines
Deal found 7/18![Singapore Airlines logo]()
$3,897
This Singapore Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:00 pm
ORD
- SYD
3 stops39h 15m
Multiple Airlines
Mon 9/282:50 pm
SYD
- ORD
3 stops41h 09m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$2,887
This KLM deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” 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.
Thu 8/274:20 pm
ORD
- SYD
3 stops47h 10m
KLM
Sun 9/611:40 am
SYD
- ORD
3 stops41h 50m
KLM
Deal found 7/20![KLM logo]()
$3,619
This Singapore Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:40 am
ORD
- SYD
3 stops42h 35m
Singapore Airlines
Tue 9/12:50 pm
SYD
- ORD
3 stops41h 45m
Singapore Airlines
Deal found 7/19![Singapore Airlines logo]()
$3,897
This KLM deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 9/14:20 pm
ORD
- SYD
3 stops47h 10m
KLM
Tue 9/810:10 am
SYD
- ORD
3 stops43h 20m
KLM
Deal found 7/18![KLM logo]()
$3,631
This Singapore Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:35 am
ORD
- SYD
3 stops42h 40m
Multiple Airlines
Tue 9/156:00 pm
SYD
- ORD
3 stops67h 06m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$3,449
Last-minute flights from O'Hare Intl to SydneyDiscover last-minute flight deals from O'Hare Intl to Sydney. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated July 23, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:00 am
ORD
- SYD
1 stop30h 05m
Qantas Airways
Sun 8/3011:40 am
SYD
- ORD
2 stops42h 14m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,271
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:06 pm
ORD
- SYD
1 stop42h 59m
Qantas Airways
Tue 9/19:25 pm
SYD
- ORD
1 stop30h 08m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,281
This Trip.com deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 8/189:20 am
ORD
- SYD
2 stops30h 45m
Multiple Airlines
Tue 8/259:10 am
SYD
- ORD
1 stop36h 07m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$1,318
This Qantas Airways deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/217:00 pm
ORD
- SYD
1 stop21h 30m
Multiple Airlines
Fri 8/289:10 am
SYD
- ORD
1 stop20h 44m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$1,266
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:00 pm
ORD
- SYD
1 stop25h 00m
United Airlines
Fri 8/2810:20 am
SYD
- ORD
2 stops21h 45m
United Airlines
Deal found 7/22![United Airlines logo]()
$1,275
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/229:06 pm
ORD
- SYD
2 stops48h 24m
Qantas Airways
Fri 9/49:10 am
SYD
- ORD
1 stop20h 44m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,301
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:16 pm
ORD
- SYD
1 stop22h 49m
Qantas Airways
Mon 8/316:00 am
SYD
- ORD
2 stops24h 54m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,319
This CheapOair deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:00 am
ORD
- SYD
2 stops33h 45m
Qantas Airways
Sun 9/69:10 am
SYD
- ORD
1 stop21h 44m
Qantas Airways
Deal found 7/21![Qantas Airways logo]()
$1,307
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 pm
ORD
- SYD
1 stop21h 05m
Qantas Airways
Mon 9/79:10 am
SYD
- ORD
1 stop20h 44m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,308
This oojo deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:00 am
ORD
- SYD
1 stop30h 30m
Qantas Airways
Tue 9/15:20 pm
SYD
- ORD
2 stops37h 34m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,261
This Justfly.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:00 pm
ORD
- SYD
1 stop21h 05m
Qantas Airways
Sat 9/59:10 am
SYD
- ORD
1 stop25h 50m
Qantas Airways
Deal found 7/22![Qantas Airways logo]()
$1,294
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 July 23, 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 July 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 8/49:28 am
ORD
- SYD
3 stops45h 47m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$599
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 8/119:20 am
ORD
- SYD
3 stops39h 35m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$663
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/262:41 pm
ORD
- SYD
3 stops51h 44m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$667
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 8/259:20 pm
ORD
- SYD
1 stop43h 10m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$673
This Gotogate deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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.
Tue 8/48:25 pm
ORD
- SYD
1 stop42h 45m
Etihad Airways
Deal found 7/19![Etihad Airways logo]()
$679
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:20 pm
ORD
- SYD
1 stop43h 10m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$680
This oojo deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:00 pm
ORD
- SYD
1 stop49h 10m
Etihad Airways
Deal found 7/19![Etihad Airways logo]()
$683
This oojo deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:25 pm
ORD
- SYD
1 stop42h 45m
Etihad Airways
Deal found 7/18![Etihad Airways logo]()
$684
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 July 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,261 (oojo) |
One-way from | $599 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $1,793 |
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 July 23, 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
Quickest round-trip
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 8/25
6:54 pm-6:50 pm
2 stops32h 56m
Sydney Kingsford Smith
Fri 9/4
8:45 pm-6:20 am
3 stops24h 35m
$1,584
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Fri 9/18
8:00 am-7:30 am
2 stops32h 30m
Sydney Kingsford Smith
Wed 9/30
5:50 pm-6:20 am
3 stops27h 30m
$1,719
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 8/23
6:54 pm-6:50 pm
2 stops32h 56m
Sydney Kingsford Smith
Sun 9/6
8:45 pm-6:20 am
3 stops24h 35m
$1,767
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 9/16
1:00 pm-7:15 pm
3 stops39h 15m
Sydney Kingsford Smith
Mon 9/28
2:50 pm-4:59 pm
3 stops41h 09m
$2,887
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 9/14
4:50 pm-6:30 am
3 stops46h 40m
Sydney Kingsford Smith
Fri 9/18
2:45 pm-2:15 pm
2 stops38h 30m
$3,054
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 8/31
9:35 am-7:15 pm
3 stops42h 40m
Sydney Kingsford Smith
Tue 9/15
6:00 pm-10:06 pm
3 stops67h 06m
$3,449
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Thu 8/27
4:20 pm-6:30 am
3 stops47h 10m
Sydney Kingsford Smith
Sun 9/6
11:40 am-2:30 pm
3 stops41h 50m
$3,619
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 9/1
4:20 pm-6:30 am
3 stops47h 10m
Sydney Kingsford Smith
Tue 9/8
10:10 am-2:30 pm
3 stops43h 20m
$3,631
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 8/25
9:40 am-7:15 pm
3 stops42h 35m
Sydney Kingsford Smith
Mon 8/31
2:50 pm-5:35 pm
3 stops41h 45m
$3,897
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Thu 8/27
9:40 am-7:15 pm
3 stops42h 35m
Sydney Kingsford Smith
Tue 9/1
2:50 pm-5:35 pm
3 stops41h 45m
$3,897
Showing 1-10 of 18 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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 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*2 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 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?
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 55 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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,189). Flying from Chicago O'Hare Intl Airport to Sydney in July is currently the most expensive (average of $1,793). 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 Chicago O'Hare Intl Airport to Sydney?
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.
Vancouver (YVR) – chosen by Cheapflights users on 27% 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 Los Angeles (LAX) have the shortest average one-way travel time for 1-stop routes: 21h 09m.
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 July 23, 2026.
Read reviews from past customers who have flown Delta,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.
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Overall
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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
Browse other O'Hare Intl and Sydney flight options. Last updated on July 23, 2026.
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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 July 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$261 | Average$1,131 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$900 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,365 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$844 | Average$1,535 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,563 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$898 | Average$1,279 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,209 | Average$1,288 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,308 | Average$1,661 | FlexibilityNo cancel fee | On-time78% |