$515+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
May 21 — May 281
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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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 April 21, 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 April 21, 2026.
This Trip.com deal was found by Cheapflights users on 4/18. 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.
Sat 5/166:55 am
ORD
- SYD
3 stops37h 55m
Multiple Airlines
Mon 6/81:15 pm
SYD
- ORD
2 stops31h 49m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,208
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:25 pm
ORD
- SYD
1 stop34h 50m
ANA
Tue 11/179:45 pm
SYD
- ORD
1 stop26h 35m
ANA
Deal found 4/17![ANA logo]()
$1,231
This CrystalTravel deal was found by Cheapflights users on 4/17. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:45 pm
ORD
- SYD
1 stop34h 25m
ANA
Tue 10/1312:45 pm
SYD
- ORD
2 stops32h 20m
ANA
Deal found 4/17![ANA logo]()
$1,234
This Cheapflightsfares deal was found by Cheapflights users on 4/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:45 pm
ORD
- SYD
1 stop34h 25m
ANA
Tue 9/811:45 am
SYD
- ORD
2 stops32h 00m
ANA
Deal found 4/16![ANA logo]()
$1,240
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:45 pm
ORD
- SYD
1 stop34h 25m
ANA
Sun 8/308:55 pm
SYD
- ORD
2 stops35h 05m
ANA
Deal found 4/17![ANA logo]()
$1,241
This Gotogate deal was found by Cheapflights users on 4/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:30 am
ORD
- SYD
1 stop40h 45m
ANA
Tue 11/2412:25 pm
SYD
- ORD
1 stop35h 55m
ANA
Deal found 4/18![ANA logo]()
$1,251
This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:15 am
ORD
- SYD
2 stops32h 50m
Multiple Airlines
Tue 5/129:10 am
SYD
- ORD
2 stops37h 45m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,252
This CrystalTravel deal was found by Cheapflights users on 4/20. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:45 pm
ORD
- SYD
1 stop24h 40m
ANA
Tue 10/1312:45 pm
SYD
- ORD
2 stops32h 20m
ANA
Deal found 4/20![ANA logo]()
$1,256
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 April 21, 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 April 21, 2026.
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:59 pm
ORD
- SYD
2 stops24h 51m
Delta
Mon 6/159:15 am
SYD
- ORD
1 stop19h 35m
Delta
Deal found 4/16![Delta logo]()
$1,422
This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:20 pm
ORD
- SYD
1 stop21h 35m
United Airlines
Tue 5/1910:20 am
SYD
- ORD
2 stops21h 45m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,422
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:50 pm
ORD
- SYD
2 stops24h 00m
Delta
Tue 9/159:15 am
SYD
- ORD
2 stops26h 15m
Delta
Deal found 4/17![Delta logo]()
$1,422
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:53 pm
ORD
- SYD
2 stops23h 57m
Delta
Sun 5/179:15 am
SYD
- ORD
2 stops22h 36m
Delta
Deal found 4/16![Delta logo]()
$1,422
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:50 pm
ORD
- SYD
2 stops24h 00m
Delta
Sun 9/279:15 am
SYD
- ORD
2 stops26h 09m
Delta
Deal found 4/16![Delta logo]()
$1,422
This Delta deal was found by Cheapflights users on 4/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:55 pm
ORD
- SYD
2 stops23h 55m
Delta
Wed 7/159:15 am
SYD
- ORD
2 stops24h 42m
Delta
Deal found 4/18![Delta logo]()
$1,422
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2911:20 am
ORD
- SYD
2 stops28h 30m
Delta
Tue 8/119:15 am
SYD
- ORD
1 stop19h 45m
Delta
Deal found 4/19![Delta logo]()
$1,423
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:55 pm
ORD
- SYD
2 stops25h 55m
Delta
Tue 9/229:15 am
SYD
- ORD
2 stops26h 15m
Delta
Deal found 4/19![Delta logo]()
$1,423
Last-minute flights from O'Hare Intl to SydneyDiscover last-minute flight deals from O'Hare Intl to Sydney. Data last updated April 21, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated April 21, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:15 am
ORD
- SYD
2 stops32h 50m
Multiple Airlines
Tue 5/129:10 am
SYD
- ORD
2 stops37h 45m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,252
This Kiwi.com deal was found by Cheapflights users on 4/18. 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.
Sun 5/107:15 am
ORD
- SYD
2 stops37h 35m
Multiple Airlines
Sun 5/315:50 pm
SYD
- ORD
1 stop27h 44m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,266
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Sun 5/107:15 am
ORD
- SYD
2 stops37h 35m
Multiple Airlines
Mon 5/185:50 pm
SYD
- ORD
1 stop27h 49m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,302
This Trip.com deal was found by Cheapflights users on 4/18. 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.
Mon 5/118:30 am
ORD
- SYD
2 stops31h 35m
Multiple Airlines
Mon 6/19:10 am
SYD
- ORD
1 stop35h 54m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,265
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:15 am
ORD
- SYD
2 stops37h 35m
Multiple Airlines
Sat 5/235:50 pm
SYD
- ORD
1 stop27h 44m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,274
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:15 am
ORD
- SYD
2 stops37h 35m
Multiple Airlines
Sat 6/65:50 pm
SYD
- ORD
1 stop27h 09m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$1,298
This Trip.com deal was found by Cheapflights users on 4/18. 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.
Sat 5/166:55 am
ORD
- SYD
3 stops37h 55m
Multiple Airlines
Mon 6/81:15 pm
SYD
- ORD
2 stops31h 49m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,208
This Trip.com deal was found by Cheapflights users on 4/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:30 am
ORD
- SYD
3 stops36h 35m
Multiple Airlines
Mon 5/251:15 pm
SYD
- ORD
3 stops46h 17m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,263
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Tue 5/196:55 am
ORD
- SYD
2 stops33h 35m
Multiple Airlines
Tue 5/265:50 pm
SYD
- ORD
1 stop27h 44m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,280
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 April 21, 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 April 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Sat 5/309:17 am
ORD
- SYD
2 stops35h 33m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$515
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:34 pm
ORD
- SYD
2 stops48h 16m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$517
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 8/272:30 pm
ORD
- SYD
2 stops30h 20m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$529
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Mon 4/279:44 pm
ORD
- SYD
2 stops47h 06m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$539
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 5/268:46 pm
ORD
- SYD
2 stops48h 04m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$542
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:37 pm
ORD
- SYD
3 stops47h 13m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$543
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Wed 5/136:55 am
ORD
- SYD
3 stops37h 55m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$544
This Kiwi.com deal was found by Cheapflights users on 4/18. 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.
Mon 9/76:50 am
ORD
- SYD
2 stops38h 00m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Fri 5/291:50 pm
ORD
- SYD
3 stops55h 00m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$555
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:15 am
ORD
- SYD
2 stops37h 35m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$558
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:50 am
ORD
- SYD
3 stops58h 00m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$566
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 April 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,208 (Trip.com) |
One-way from | $515 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $1,441 |
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 April 21, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 6/1
2:59 pm-6:50 am
2 stops24h 51m
Sydney Kingsford Smith
Mon 6/15
9:15 am-1:50 pm
1 stop19h 35m
$1,422
Quickest round-trip
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 5/5
6:20 pm-6:55 am
1 stop21h 35m
Sydney Kingsford Smith
Tue 5/19
10:20 am-5:05 pm
2 stops21h 45m
$1,422
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 8/31
3:50 pm-6:50 am
2 stops24h 00m
Sydney Kingsford Smith
Tue 9/15
9:15 am-8:30 pm
2 stops26h 15m
$1,422
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 5/4
3:53 pm-6:50 am
2 stops23h 57m
Sydney Kingsford Smith
Sun 5/17
9:15 am-4:51 pm
2 stops22h 36m
$1,422
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 9/20
3:50 pm-6:50 am
2 stops24h 00m
Sydney Kingsford Smith
Sun 9/27
9:15 am-8:24 pm
2 stops26h 09m
$1,422
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 7/8
3:55 pm-6:50 am
2 stops23h 55m
Sydney Kingsford Smith
Wed 7/15
9:15 am-6:57 pm
2 stops24h 42m
$1,422
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 7/29
11:20 am-6:50 am
2 stops28h 30m
Sydney Kingsford Smith
Tue 8/11
9:15 am-2:00 pm
1 stop19h 45m
$1,423
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 9/1
1:55 pm-6:50 am
2 stops25h 55m
Sydney Kingsford Smith
Tue 9/22
9:15 am-8:30 pm
2 stops26h 15m
$1,423
Cheapest one-way
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 8/4
5:29 pm-11:50 am
3 stops51h 21m
$581
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 9/7
5:30 pm-11:50 am
3 stops51h 20m
$581
Showing 1-10 of 17 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Sydney flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from O'Hare Intl to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from O'Hare Intl with our price prediction graph.
ORD-SYD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago O'Hare Intl Airport to Sydney
Prices
More
How far ahead should I book a flight from Chicago O'Hare Intl Airport to Sydney?
Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Sydney. Price data was last updated on April 17, 2026.
To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Sydney, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Sydney?
Currently, 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 December is currently the most expensive (average of $1,660). 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.
Los Angeles (LAX) – chosen by Cheapflights users on 25% 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: 20h 53m.
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 April 21, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from Chicago O'Hare Intl Airport to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
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O'Hare Intl and Sydney flights
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Top 8 airlines flying from O'Hare Intl to Sydney
Discover the top 8 airlines that operate flights from O'Hare Intl to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$198 | Average$1,443 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$317 | Average$1,467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$716 | Average$1,181 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$837 | Average$1,363 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$870 | Average$1,559 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$898 | Average$1,246 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,177 | Average$1,259 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$1,282 | Average$1,461 | FlexibilityNo cancel fee | On-time78% |