$534+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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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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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 September 7, 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 September 7, 2026.
This lol.travel deal was found by Cheapflights users on 9/5. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:40 pm -
1 stop24h 40m
Sun 9/279:20 am -
1 stop20h 23m
Deal found 9/5![Air Canada logo]()
$1,189
This lol.travel deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:30 am -
1 stop40h 45m
Sat 11/712:25 pm -
1 stop35h 55m
Deal found 9/2![ANA logo]()
$1,201
This Trip.com deal was found by Cheapflights users on 9/5. 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.
Mon 9/2110:26 am -
3 stops34h 24m
Wed 9/301:15 pm -
3 stops35h 05m
Deal found 9/5![Multiple Airlines logo]()
$1,232
This oojo deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:40 pm -
2 stops27h 55m
Wed 11/1111:50 am -
2 stops25h 47m
Deal found 9/4![Air New Zealand logo]()
$1,236
This oojo deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:00 pm -
2 stops24h 35m
Sun 12/1311:50 am -
2 stops27h 15m
Deal found 9/3![Air New Zealand logo]()
$1,237
This FlightHub deal was found by Cheapflights users on 9/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:00 pm -
2 stops26h 35m
Sun 11/89:55 am -
2 stops32h 04m
Deal found 9/6![Air New Zealand logo]()
$1,238
This SmartFares deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:12 pm -
2 stops32h 03m
Mon 11/99:45 pm -
2 stops48h 35m
Deal found 9/2![ANA logo]()
$1,242
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 September 7, 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 September 7, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:16 pm -
2 stops32h 29m
Sat 11/79:40 pm -
3 stops25h 00m
Deal found 9/2![Multiple Airlines logo]()
$1,588
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/287:45 am -
1 stop31h 45m
Wed 12/2310:40 am -
1 stop28h 08m
Deal found 9/2![Delta logo]()
$1,612
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:22 pm -
2 stops26h 08m
Sat 9/265:50 pm -
2 stops27h 30m
Deal found 9/6![Alaska Airlines logo]()
$1,774
This KLM deal was found by Cheapflights users on 9/6. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/154:25 pm -
3 stops46h 00m
Sun 11/2911:10 am -
3 stops44h 15m
Deal found 9/6![KLM logo]()
$2,682
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:59 pm -
1 stop20h 51m
Mon 9/219:15 am -
2 stops26h 41m
Deal found 9/6![Delta logo]()
$1,618
This Philippine Airlines deal was found by Cheapflights users on 9/6. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:23 am -
2 stops32h 37m
Sat 10/1011:15 am -
2 stops34h 25m
Deal found 9/6![Multiple Airlines logo]()
$1,681
This Alaska Airlines deal was found by Cheapflights users on 9/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am -
3 stops30h 25m
Sat 12/1211:15 am -
3 stops29h 44m
Deal found 9/5![Alaska Airlines logo]()
$1,829
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:20 am -
3 stops28h 05m
Sun 12/1311:15 am -
3 stops29h 44m
Deal found 9/4![Alaska Airlines logo]()
$1,839
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:22 pm -
2 stops26h 08m
Sat 9/128:45 pm -
2 stops31h 37m
Deal found 9/6![Multiple Airlines logo]()
$2,125
This KLM deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:25 pm -
3 stops46h 00m
Mon 11/94:30 pm -
2 stops40h 45m
Deal found 9/2![KLM logo]()
$2,690
This Alaska Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/207:26 am -
3 stops29h 59m
Wed 11/259:25 pm -
2 stops37h 31m
Deal found 9/3![Alaska Airlines logo]()
$2,394
This KLM deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:25 pm -
3 stops46h 00m
Sun 11/810:35 am -
3 stops44h 50m
Deal found 9/4![KLM logo]()
$2,815
Last-minute flights from O'Hare Intl to SydneyDiscover last-minute flight deals from O'Hare Intl to Sydney. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated September 7, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 9/5. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:40 pm -
1 stop24h 40m
Sun 9/279:20 am -
1 stop20h 23m
Deal found 9/5![Air Canada logo]()
$1,189
This Trip.com deal was found by Cheapflights users on 9/5. 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.
Mon 9/2110:26 am -
3 stops34h 24m
Wed 9/301:15 pm -
3 stops35h 05m
Deal found 9/5![Multiple Airlines logo]()
$1,232
This FlightHub deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/213:00 pm -
2 stops25h 45m
Mon 11/99:55 am -
2 stops28h 41m
Deal found 9/2![Air New Zealand logo]()
$1,238
This lol.travel deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:30 am -
1 stop40h 45m
Sat 11/712:25 pm -
1 stop35h 55m
Deal found 9/2![ANA logo]()
$1,201
This SmartFares deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:12 pm -
2 stops32h 03m
Mon 11/99:45 pm -
2 stops48h 35m
Deal found 9/2![ANA logo]()
$1,242
This oojo deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:40 pm -
2 stops27h 55m
Wed 11/1111:50 am -
2 stops25h 47m
Deal found 9/4![Air New Zealand logo]()
$1,236
This oojo deal was found by Cheapflights users on 9/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:47 pm -
2 stops24h 48m
Mon 11/911:50 am -
2 stops28h 09m
Deal found 9/5![Air New Zealand logo]()
$1,237
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 September 7, 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 September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/208:01 pm -
1 stop43h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:30 am -
2 stops30h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$566
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/319:00 am -
2 stops29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$588
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:46 pm -
2 stops44h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$599
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 12/212:51 pm -
2 stops48h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$624
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 12/512:51 pm -
3 stops38h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$634
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:01 pm -
2 stops45h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$638
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am -
2 stops31h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$649
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:26 am -
2 stops27h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$657
This Trip.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:01 pm -
2 stops54h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$662
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,189 (lol.travel) |
One-way from | $534 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $1,589 |
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 September 7, 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 2/1
2:10 pm-12:05 pm
3 stops52h 55m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$706
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/3
4:25 pm-10:45 am
2 stops49h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$711
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Tue 11/10
4:25 pm-8:15 pm
1 stop34h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$761
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sat 2/13
5:55 pm-1:10 pm
3 stops50h 15m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$776
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Fri 11/6
1:55 pm-9:35 am
2 stops26h 40m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$782
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Sat 2/13
3:35 pm-9:35 am
1 stop25h 00m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$797
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Thu 1/7
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
Sat 1/2
8:15 pm-7:25 pm
2 stops54h 10m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$923
Quickest round-trip
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Mon 10/12
6:25 pm-7:55 am
1 stop21h 30m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$1,021
ChicagoSydney
ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith
ORDSYD
Chicago O'Hare Intl
Mon 10/5
4:05 pm-7:55 am
1 stop23h 50m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$1,021
Showing 1-10 of 22 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 September.
| 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 | |
| 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
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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,223). Flying from Chicago O'Hare Intl Airport to Sydney in December 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?
Airfare is below average for this route at the moment.
Chicago O'Hare Intl Airport to Sydney flights typically cost between $1,265 and $1,709 in September.The cheapest round-trip price found within the last 5 days was $1,189 on Air Canada (Sep 13-Sep 27).
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 59% 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 10m.
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 September 7, 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.
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - 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.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
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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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$237 | Average$1,530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$895 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,365 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$870 | Average$1,599 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,117 | Average$1,288 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,193 | Average$1,270 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,294 | Average$1,662 | FlexibilityNo cancel fee | On-time78% |