$619+ Cheap flights from O'Hare Intl (ORD) to Sydney (SYD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Nov 18 — Nov 251
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
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 O'Hare Intl to Sydney
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Best
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One-way
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 October 19, 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 October 19, 2026.
This Philippine Airlines deal was found by Cheapflights users on 10/18. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
2 stops35h 00m
Mon 11/911:30 am -
2 stops35h 29m
Deal found 10/18![Multiple Airlines logo]()
$1,317
This Philippine Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
2 stops35h 00m
Sun 11/111:30 am -
2 stops35h 29m
Deal found 10/17![Multiple Airlines logo]()
$1,320
This oojo deal was found by Cheapflights users on 10/19. 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.
Tue 12/15:59 pm -
1 stop43h 56m
Tue 12/89:50 pm -
2 stops33h 22m
Deal found 10/19![Qantas Airways logo]()
$1,322
This Philippine Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:30 am -
2 stops35h 20m
Sun 11/1511:30 am -
2 stops34h 32m
Deal found 10/16![Multiple Airlines logo]()
$1,323
This FlightHub deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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.
Fri 10/236:25 am -
2 stops34h 10m
Wed 11/42:05 pm -
2 stops24h 57m
Deal found 10/17![Air New Zealand logo]()
$1,326
This FlightHub deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Fri 11/132:30 pm -
2 stops27h 05m
Wed 11/182:05 pm -
2 stops24h 55m
Deal found 10/16![Air New Zealand logo]()
$1,327
This Mytrip deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/210:19 am -
3 stops33h 16m
Mon 11/92:00 pm -
3 stops32h 13m
Deal found 10/15![Multiple Airlines logo]()
$1,330
This FlightHub deal was found by Cheapflights users on 10/18. 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.
Sat 11/79:35 pm -
2 stops42h 00m
Fri 11/1311:50 am -
2 stops24h 06m
Deal found 10/18![Air New Zealand logo]()
$1,335
This FlightHub deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:50 pm -
2 stops43h 45m
Fri 12/119:55 am -
2 stops31h 55m
Deal found 10/16![Air New Zealand logo]()
$1,336
This oojo deal was found by Cheapflights users on 10/18. 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.
Wed 12/28:45 am -
2 stops30h 50m
Wed 12/911:50 am -
2 stops24h 04m
Deal found 10/18![Air New Zealand logo]()
$1,339
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 October 19, 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 October 19, 2026.
This Turkish Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/611:45 am -
2 stops38h 40m
Thu 1/219:35 pm -
2 stops53h 25m
Deal found 10/15![Turkish Airlines logo]()
$1,492
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/48:00 am -
2 stops31h 25m
Sat 4/1710:20 am -
3 stops28h 20m
Deal found 10/18![Alaska Airlines logo]()
$1,593
This Alaska Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” 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.
Wed 12/308:59 pm -
2 stops29h 46m
Sat 1/99:40 pm -
3 stops32h 33m
Deal found 10/14![Multiple Airlines logo]()
$2,146
This KLM deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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.
Sun 11/294:25 pm -
3 stops46h 00m
Sun 12/610:35 am -
3 stops44h 50m
Deal found 10/15![KLM logo]()
$2,975
This Alaska Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/82:03 pm -
2 stops25h 27m
Sun 4/2510:20 am -
3 stops28h 20m
Deal found 10/15![Alaska Airlines logo]()
$1,621
This Alaska Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/258:00 am -
3 stops30h 25m
Sun 4/410:20 am -
3 stops28h 20m
Deal found 10/15![Alaska Airlines logo]()
$1,712
This Alaska Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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.
Wed 1/66:57 pm -
3 stops31h 48m
Thu 1/219:40 pm -
2 stops33h 41m
Deal found 10/15![Multiple Airlines logo]()
$2,385
This KLM deal was found by Cheapflights users on 10/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/185:25 pm -
3 stops46h 00m
Sun 3/2811:10 am -
3 stops43h 05m
Deal found 10/19![KLM logo]()
$3,451
This KLM deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Sun 12/206:25 pm -
2 stops43h 10m
Sun 1/1011:10 am -
3 stops44h 15m
Deal found 10/16![KLM logo]()
$3,466
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/172:17 pm -
2 stops36h 28m
Fri 1/19:40 pm -
3 stops25h 00m
Deal found 10/18![Multiple Airlines logo]()
$3,535
Last-minute flights from O'Hare Intl to SydneyDiscover last-minute flight deals from O'Hare Intl to Sydney. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated October 19, 2026 and is based on user searches.
This Philippine Airlines deal was found by Cheapflights users on 10/18. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
2 stops35h 00m
Mon 11/911:30 am -
2 stops35h 29m
Deal found 10/18![Multiple Airlines logo]()
$1,317
This FlightHub deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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.
Fri 10/236:25 am -
2 stops34h 10m
Wed 11/42:05 pm -
2 stops24h 57m
Deal found 10/17![Air New Zealand logo]()
$1,326
This Philippine Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:30 am -
2 stops35h 20m
Sun 11/1511:30 am -
2 stops34h 32m
Deal found 10/16![Multiple Airlines logo]()
$1,323
This FlightHub deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/16:55 am -
2 stops32h 40m
Sun 11/227:30 am -
2 stops31h 30m
Deal found 10/15![Air New Zealand logo]()
$1,345
This Mytrip deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” 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 11/210:19 am -
3 stops33h 16m
Mon 11/92:00 pm -
3 stops32h 13m
Deal found 10/15![Multiple Airlines logo]()
$1,330
This FlightHub deal was found by Cheapflights users on 10/18. 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.
Sat 11/79:35 pm -
2 stops42h 00m
Fri 11/1311:50 am -
2 stops24h 06m
Deal found 10/18![Air New Zealand logo]()
$1,335
This FlightHub deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” 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.
Fri 11/132:30 pm -
2 stops27h 05m
Wed 11/182:05 pm -
2 stops24h 55m
Deal found 10/16![Air New Zealand logo]()
$1,327
This Philippine Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:29 am -
2 stops34h 21m
Mon 11/1611:30 am -
2 stops34h 32m
Deal found 10/16![Multiple Airlines logo]()
$1,348
This oojo deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:35 pm -
2 stops42h 00m
Sat 12/127:25 pm -
2 stops40h 31m
Deal found 10/17![Air New Zealand logo]()
$1,320
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 October 19, 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 October 19, 2026.
This Philippine Airlines deal was found by Cheapflights users on 10/19. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/85:00 am -
2 stops35h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Multiple Airlines logo]()
$619
This Philippine Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/226:29 am -
2 stops35h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$621
This Alaska Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 11/177:00 am -
2 stops30h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Alaska Airlines logo]()
$650
This Philippine Airlines deal was found by Cheapflights users on 10/19. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:29 am -
2 stops34h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Multiple Airlines logo]()
$681
This Alaska Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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.
Wed 12/27:27 am -
3 stops29h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Alaska Airlines logo]()
$685
This Philippine Airlines deal was found by Cheapflights users on 10/18. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/79:04 pm -
2 stops43h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Multiple Airlines logo]()
$689
This Alaska Airlines deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” 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 1/318:00 am -
2 stops29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Alaska Airlines logo]()
$692
This Thrive Travel deal was found by Cheapflights users on 10/18. 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 Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:53 pm -
1 stop23h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Qantas Airways logo]()
$693
This Philippine Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:15 pm -
2 stops47h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$700
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/286:21 am -
2 stops31h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Multiple Airlines logo]()
$706
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 October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,317 (Philippine Airlines) |
One-way from | $619 (Philippine Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $1,454 |
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 7,457,451 searches. Data last updated October 19, 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 Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Mon 3/8
5:00 am-9:50 am
2 stops35h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$619
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/10
6:29 am-9:50 am
2 stops34h 21m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$681
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 10/27
6:00 am-9:50 am
2 stops35h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$686
Quickest round-trip
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/17
9:30 am-6:25 am
3 stops27h 55m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$744
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/10
7:20 am-6:25 am
3 stops30h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$763
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Wed 12/23
6:00 am-6:25 am
2 stops31h 25m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$843
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 1/12
11:45 am-7:25 pm
2 stops38h 40m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$853
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Thu 1/14
11:45 am-7:25 pm
2 stops38h 40m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$853
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sun 12/27
7:45 am-8:30 am
1 stop31h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$1,317
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Wed 1/6
11:45 am-7:25 pm
2 stops38h 40m
Sydney Kingsford Smith
Thu 1/21
9:35 pm-10:00 am
2 stops53h 25m
$1,492
Showing 1-10 of 19 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | 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 Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | 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
Prices
More
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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,238). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $1,785). 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?
Airfare is typical for this route at the moment.
Chicago O'Hare Intl Airport to Sydney flights typically cost between $1,241 and $1,603 in November.The cheapest round-trip price found within the last 5 days was $1,317 on Multiple Airlines (Nov 1-Nov 15).
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 66% 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 11m.
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 34m.
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 October 19, 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.
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Overall
7.8
Food
7.2
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
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.
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O'Hare Intl and Sydney flights
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Top 9 airlines flying from O'Hare Intl to Sydney
Discover the top 9 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 7,457,451 searches. Data last updated October 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$237 | Average$1,530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$819 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,363 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,550 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,582 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,117 | Average$1,328 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,209 | Average$1,270 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,294 | Average$1,555 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$1,382 | Average$1,423 | FlexibilityNo cancel fee | On-time68% |