Cheap flights from Chicago O'Hare Intl Airport to Sydney from $777
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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
17 Jan — 24 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to Sydney Kingsford Smith are usually found in May or March, booked 48 days in advance, depart on a Friday or Sunday and return on a Monday
Cheap flight deals from O'Hare Intl to Sydney
Enter your travel dates to find the best prices.
Cheapest flights from O'Hare Intl to Sydney
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 18 December 2025.
Mon 22/1219:47ORD - SYD
2 stops26h 03mQantas Airways
Fri 26/1217:50SYD - ORD
2 stops38h 43mQantas Airways
Deal found 14/12$2,376
Mon 22/1219:47ORD - SYD
2 stops26h 03mQantas Airways
Wed 7/119:15SYD - ORD
2 stops37h 22mQantas Airways
Deal found 15/12$2,435
Fri 26/1218:00ORD - SYD
2 stops46h 35mAir Canada
Wed 21/109:00SYD - ORD
2 stops22h 41mAir Canada
Deal found 15/12$2,544
Sun 21/1219:22ORD - SYD
1 stop20h 38mQantas Airways
Sat 27/1209:00SYD - ORD
2 stops25h 48mQantas Airways
Deal found 17/12$2,613
Wed 24/1216:00ORD - SYD
1 stop22h 00mUnited Airlines
Wed 14/112:10SYD - ORD
1 stop24h 55mUnited Airlines
Deal found 14/12$2,665
Sun 28/1210:00ORD - SYD
2 stops27h 50mDelta
Sun 11/110:40SYD - ORD
2 stops27h 25mDelta
Deal found 15/12$2,672
Sat 27/1221:23ORD - SYD
1 stop40h 37mUnited Airlines
Sun 11/111:20SYD - ORD
1 stop28h 39mUnited Airlines
Deal found 16/12$2,680
Wed 24/1216:00ORD - SYD
1 stop22h 00mUnited Airlines
Sat 24/112:10SYD - ORD
1 stop21h 47mUnited Airlines
Deal found 15/12$2,740
Sat 27/1210:05ORD - SYD
2 stops29h 25mDelta
Mon 12/114:15SYD - ORD
2 stops26h 44mDelta
Deal found 17/12$2,748
Fri 26/1222:00ORD - SYD
1 stop42h 05mUnited Airlines
Mon 12/111:50SYD - ORD
1 stop19h 50mUnited Airlines
Deal found 16/12$2,763
Thu 25/1221:05ORD - SYD
1 stop40h 15mUnited Airlines
Sun 11/111:20SYD - ORD
1 stop26h 05mUnited Airlines
Deal found 15/12$2,764
Best flights from O'Hare Intl to Sydney
Discover carefully curated flight deals from O'Hare Intl to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 December 2025.
Tue 17/207:15ORD - SYD
3 stops33h 20mAir Canada
Wed 25/211:20SYD - ORD
2 stops37h 40mAir Canada
Deal found 15/12$1,462
Wed 11/218:40ORD - SYD
1 stop21h 20mQantas Airways
Sun 1/319:15SYD - ORD
2 stops38h 23mQantas Airways
Deal found 15/12$1,487
Sun 1/215:10ORD - SYD
1 stop24h 50mMultiple Airlines
Sun 15/214:05SYD - ORD
1 stop20h 33mMultiple Airlines
Deal found 17/12$1,737
Sun 1/211:15ORD - SYD
2 stops26h 35mDelta
Sun 15/210:40SYD - ORD
2 stops27h 04mDelta
Deal found 17/12$1,747
Wed 4/318:20ORD - SYD
1 stop21h 45mUnited Airlines
Wed 18/312:10SYD - ORD
1 stop20h 52mUnited Airlines
Deal found 15/12$1,758
Tue 13/118:30ORD - SYD
1 stop21h 35mUnited Airlines
Mon 16/211:50SYD - ORD
1 stop19h 53mUnited Airlines
Deal found 16/12$1,758
Mon 2/313:20ORD - SYD
2 stops26h 10mDelta
Mon 27/409:15SYD - ORD
2 stops23h 46mDelta
Deal found 16/12$1,765
Sun 8/316:35ORD - SYD
1 stop24h 40mUnited Airlines
Mon 16/312:10SYD - ORD
1 stop20h 52mUnited Airlines
Deal found 15/12$1,758
Tue 13/118:30ORD - SYD
1 stop21h 35mUnited Airlines
Tue 17/212:10SYD - ORD
2 stops21h 47mUnited Airlines
Deal found 16/12$1,765
Mon 12/109:01ORD - SYD
2 stops28h 19mUnited Airlines
Mon 16/211:50SYD - ORD
1 stop19h 53mUnited Airlines
Deal found 15/12$1,765
Mon 2/312:55ORD - SYD
2 stops27h 20mUnited Airlines
Mon 27/410:20SYD - ORD
1 stop25h 05mUnited Airlines
Deal found 16/12$1,765
Mon 2/314:33ORD - SYD
2 stops25h 42mUnited Airlines
Sun 3/510:20SYD - ORD
1 stop26h 13mUnited Airlines
Deal found 16/12$1,765
Last-minute flights from O'Hare Intl to Sydney
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated 18 December 2025 and is based on user searches.
Sun 25/115:35ORD - SYD
2 stops30h 05mAir Canada
Tue 3/211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 15/12$1,472
Mon 26/115:35ORD - SYD
1 stop25h 00mAir Canada
Thu 12/211:20SYD - ORD
2 stops22h 45mAir Canada
Deal found 15/12$1,602
Mon 26/115:35ORD - SYD
1 stop25h 00mAir Canada
Thu 29/111:20SYD - ORD
2 stops37h 45mAir Canada
Deal found 15/12$1,607
Tue 27/111:46ORD - SYD
1 stop25h 24mQantas Airways
Mon 2/217:50SYD - ORD
2 stops39h 59mQantas Airways
Deal found 17/12$1,430
Tue 27/115:35ORD - SYD
1 stop25h 00mAir Canada
Mon 2/211:20SYD - ORD
3 stops37h 45mAir Canada
Deal found 16/12$1,554
Thu 29/115:10ORD - SYD
1 stop23h 15mQantas Airways
Tue 3/207:05SYD - ORD
2 stops26h 44mQantas Airways
Deal found 17/12$1,578
Sat 31/114:15ORD - SYD
1 stop25h 45mQantas Airways
Sat 7/219:15SYD - ORD
2 stops36h 42mQantas Airways
Deal found 16/12$1,419
Sat 31/115:35ORD - SYD
1 stop25h 00mAir Canada
Sat 7/211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 16/12$1,570
One-way flights from O'Hare Intl to Sydney
Search for one-way flight options from O'Hare Intl to Sydney. Find affordable one-way fares based on user searches. Data last updated 18 December 2025.
Sat 31/108:00ORD - SYD
2 stops30h 25mMultiple Airlines
Deal found 14/12$777
Tue 10/208:10ORD - SYD
2 stops30h 15mMultiple Airlines
Deal found 17/12$804
Tue 3/308:10ORD - SYD
3 stops57h 35mMultiple Airlines
Deal found 15/12$821
Sat 7/319:39ORD - SYD
3 stops55h 56mMultiple Airlines
Deal found 15/12$830
Wed 11/208:10ORD - SYD
2 stops30h 15mMultiple Airlines
Deal found 17/12$833
Thu 12/216:16ORD - SYD
2 stops46h 09mMultiple Airlines
Deal found 17/12$842
Mon 2/306:00ORD - SYD
3 stops59h 45mMultiple Airlines
Deal found 15/12$843
Mon 16/213:30ORD - SYD
2 stops47h 45mMultiple Airlines
Deal found 17/12$854
Mon 2/209:00ORD - SYD
2 stops29h 25mMultiple Airlines
Deal found 16/12$857
Sun 15/213:30ORD - SYD
2 stops47h 45mMultiple Airlines
Deal found 17/12$863
Sun 8/319:39ORD - SYD
2 stops46h 11mMultiple Airlines
Deal found 15/12$869
Tue 27/108:00ORD - SYD
3 stops29h 10mMultiple Airlines
Deal found 16/12$871
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 18 December 2025.
Customise 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 647,157 searches. Data last updated 18 December 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.
Fly from
O'Hare Intl
Fly to
Sydney
Route
Depart
Return
Price
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 17/2
07:15-09:35
3 stops33h 20m
Sydney Kingsford Smith
Wed 25/2
11:20-08:00
2 stops37h 40m
$1,462
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 11/2
18:40-09:00
1 stop21h 20m
Sydney Kingsford Smith
Sun 1/3
19:15-16:38
2 stops38h 23m
$1,487
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 1/2
15:10-09:00
1 stop24h 50m
Sydney Kingsford Smith
Sun 15/2
14:05-17:38
1 stop20h 33m
$1,737
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 1/2
11:15-06:50
2 stops26h 35m
Sydney Kingsford Smith
Sun 15/2
10:40-20:44
2 stops27h 04m
$1,747
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 4/3
18:20-09:05
1 stop21h 45m
Sydney Kingsford Smith
Wed 18/3
12:10-17:02
1 stop20h 52m
$1,758
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 13/1
18:30-09:05
1 stop21h 35m
Sydney Kingsford Smith
Mon 16/2
11:50-14:43
1 stop19h 53m
$1,758
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 8/3
16:35-09:15
1 stop24h 40m
Sydney Kingsford Smith
Mon 16/3
12:10-17:02
1 stop20h 52m
$1,758
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 2/3
13:20-08:30
2 stops26h 10m
Sydney Kingsford Smith
Mon 27/4
09:15-18:01
2 stops23h 46m
$1,765
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Tue 13/1
18:30-09:05
1 stop21h 35m
Sydney Kingsford Smith
Tue 17/2
12:10-16:57
2 stops21h 47m
$1,765
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 12/1
09:01-06:20
2 stops28h 19m
Sydney Kingsford Smith
Mon 16/2
11:50-14:43
1 stop19h 53m
$1,765
Flights are sorted by cheapest return flights first.
Deals found on 14/12
Showing 1-10 of 23 results
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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.
Estimated return 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 return flight from O'Hare Intl to Sydney. Price data was last updated on 12 December 2025.
The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Sydney?
Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $299). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $1,286). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ORD to SYD?
Find hourly flight availability from O'Hare Intl to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 December 2025.
It’s optimal to fly from Chicago O'Hare Intl Airport to Sydney in the afternoon. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight at midday.
How much does it cost for a return flight from Chicago O'Hare Intl Airport to Sydney?
What’s the top stopover airport for flights from Chicago O'Hare Intl Airport to Sydney?
Share of one-stop return flights from Chicago O'Hare Intl Airport to Sydney chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Vancouver (YVR) – chosen by Cheapflights users on 43% of one-stop itineraries from Chicago O'Hare Intl Airport to Sydney on Cheapflights.
What’s the cheapest stopover airport for flights from Chicago O'Hare Intl Airport to Sydney?
Average return fare for one-stop flights from Chicago O'Hare Intl Airport to Sydney, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Dallas (DFW) is the most affordable one-stop option, with an average return flight price of $1,290.
What’s the fastest stopover option from Chicago O'Hare Intl Airport to Sydney?
Shortest average travel time for one-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 stopover airport.
Flights via Dallas (DFW) have the shortest average one-way travel time for one-stop routes: 21h 53m.
Which airport typically offers the quickest stopover for flights from Chicago O'Hare Intl Airport to Sydney?
Average stopover duration for one-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 Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 3h 08m.
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 18 December 2025.
Get a feel of what it's like to fly with Qantas Airways and American Airlines from Chicago O'Hare Intl Airport to Sydney by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
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.
What airport do you fly into for flights to Sydney from Chicago O'Hare Intl?
For a flight from Chicago O'Hare Intl to Sydney, you will be flying into Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre vof the city. Kingsford Smith is the only Sydney airport and it handles 0 inbound flights from Chicago O'Hare Intl per day. 2 airlines have flights to Sydney Kingsford Smith from Chicago O'Hare Intl on a regular basis.
How long is the flight from Chicago O'Hare Intl Airport to Sydney?
For as low as $1,487, Air Canada can have you in Sydney from Chicago O'Hare Intl Airport in 21h 20m. The distance between Chicago O'Hare Intl Airport and Sydney is about 14851 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Sydney round-trip?
According to our current data, American Airlines ($1,295), and Qantas Airways ($1,321) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that American Airlines is 20% cheaper than the other options available to this destination.
Can I find deals for business class flights from O'Hare Intl to Sydney?
Yes. Cheapflights offers flight deals from O'Hare Intl to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Sydney?
Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $299). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $1,286). 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.
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 December 2025.
Discover the top 2 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 647,157 searches. Data last updated 18 December 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from O'Hare Intl to Sydney?
Cheapflights helps you search for flights from O'Hare Intl to Sydney via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Sydney?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from O'Hare Intl to Sydney for you. Better yet — we are completely free to use.
Can Cheapflights find flights from O'Hare Intl to Sydney with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from O'Hare Intl to Sydney, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from O'Hare Intl to Sydney become cheaper?
Of course! You can now track prices for flights from O'Hare Intl to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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