Cheap flights from Chicago O'Hare Intl Airport to Sydney from $628
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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
4 Jan — 11 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 March or May, 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 5 December 2025.
Mon 22/1216:34ORD - SYD
1 stop23h 26mQantas Airways
Fri 16/117:50SYD - ORD
2 stops38h 07mQantas Airways
Deal found 2/12$1,518
Sun 7/1218:17ORD - SYD
1 stop21h 43mQantas Airways
Tue 16/1211:20SYD - ORD
1 stop21h 42mQantas Airways
Deal found 3/12$1,844
Sun 7/1218:17ORD - SYD
1 stop21h 43mQantas Airways
Sun 14/1211:20SYD - ORD
1 stop21h 47mQantas Airways
Deal found 3/12$1,863
Sun 7/1217:25ORD - SYD
2 stops22h 35mAmerican Airlines
Sun 14/1211:20SYD - ORD
1 stop22h 34mAmerican Airlines
Deal found 3/12$1,871
Thu 4/1211:45ORD - SYD
1 stop28h 15mQantas Airways
Wed 10/1211:20SYD - ORD
1 stop23h 32mQantas Airways
Deal found 2/12$1,878
Thu 4/1217:25ORD - SYD
2 stops22h 35mAmerican Airlines
Wed 10/1211:20SYD - ORD
1 stop23h 32mAmerican Airlines
Deal found 2/12$1,946
Fri 5/1217:10ORD - SYD
2 stops45h 25mQantas Airways
Thu 11/1207:05SYD - ORD
2 stops26h 49mQantas Airways
Deal found 4/12$2,151
Sat 6/1206:50ORD - SYD
1 stop31h 35mMultiple Airlines
Mon 8/1217:45SYD - ORD
1 stop23h 28mMultiple Airlines
Deal found 3/12$2,172
Fri 5/1206:50ORD - SYD
1 stop31h 35mMultiple Airlines
Fri 12/1217:45SYD - ORD
1 stop23h 28mMultiple Airlines
Deal found 4/12$2,188
Wed 31/1215:40ORD - SYD
1 stop24h 55mAir Canada
Thu 29/111:20SYD - ORD
2 stops38h 53mAir Canada
Deal found 3/12$2,199
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 5 December 2025.
Sat 31/115:35ORD - SYD
2 stops30h 05mAir Canada
Sun 15/211:20SYD - ORD
2 stops25h 25mAir Canada
Deal found 4/12$1,544
Sat 31/118:40ORD - SYD
1 stop21h 20mQantas Airways
Sun 15/211:20SYD - ORD
1 stop22h 18mQantas Airways
Deal found 4/12$1,712
Wed 21/117:16ORD - SYD
1 stop22h 59mUnited Airlines
Mon 2/211:20SYD - ORD
1 stop20h 30mUnited Airlines
Deal found 3/12$1,756
Wed 11/210:35ORD - SYD
2 stops28h 55mDelta
Wed 4/310:40SYD - ORD
2 stops23h 11mDelta
Deal found 4/12$1,763
Wed 4/316:30ORD - SYD
1 stop23h 30mQantas Airways
Wed 11/313:05SYD - ORD
1 stop20h 43mQantas Airways
Deal found 4/12$1,732
Mon 26/112:45ORD - SYD
1 stop25h 15mUnited Airlines
Tue 3/211:50SYD - ORD
1 stop19h 50mUnited Airlines
Deal found 3/12$1,756
Wed 21/116:16ORD - SYD
1 stop21h 04mUnited Airlines
Wed 28/111:50SYD - ORD
1 stop19h 50mUnited Airlines
Deal found 3/12$1,756
Wed 21/118:30ORD - SYD
1 stop21h 35mUnited Airlines
Wed 4/212:10SYD - ORD
1 stop19h 45mUnited Airlines
Deal found 3/12$1,756
Sun 25/114:12ORD - SYD
1 stop23h 48mUnited Airlines
Sun 1/212:10SYD - ORD
1 stop19h 43mUnited Airlines
Deal found 3/12$1,756
Wed 18/314:26ORD - SYD
1 stop23h 54mUnited Airlines
Sun 5/410:20SYD - ORD
1 stop29h 40mUnited Airlines
Deal found 2/12$1,757
Mon 16/318:20ORD - SYD
1 stop22h 55mUnited Airlines
Tue 7/409:30SYD - ORD
1 stop22h 29mUnited Airlines
Deal found 2/12$1,757
Tue 20/120:10ORD - SYD
1 stop43h 55mUnited Airlines
Tue 3/212:10SYD - ORD
1 stop19h 43mUnited Airlines
Deal found 3/12$1,772
Last-minute flights from O'Hare Intl to Sydney
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated 5 December 2025 and is based on user searches.
Sat 17/119:12ORD - SYD
1 stop41h 58mQantas Airways
Sat 24/116:20SYD - ORD
2 stops41h 29mQantas Airways
Deal found 3/12$1,443
Sat 17/119:12ORD - SYD
1 stop41h 58mQantas Airways
Mon 2/217:50SYD - ORD
2 stops37h 05mQantas Airways
Deal found 3/12$1,497
Sun 18/115:35ORD - SYD
2 stops30h 05mAir Canada
Sun 1/211:20SYD - ORD
2 stops27h 45mAir Canada
Deal found 4/12$1,479
Mon 19/114:15ORD - SYD
1 stop25h 45mQantas Airways
Mon 2/217:50SYD - ORD
2 stops39h 59mQantas Airways
Deal found 2/12$1,473
Mon 19/115:35ORD - SYD
2 stops33h 15mMultiple Airlines
Mon 2/211:20SYD - ORD
2 stops27h 45mMultiple Airlines
Deal found 2/12$1,491
Fri 23/118:40ORD - SYD
1 stop21h 20mQantas Airways
Fri 30/107:05SYD - ORD
2 stops24h 52mQantas Airways
Deal found 3/12$1,438
Sat 24/114:15ORD - SYD
2 stops49h 55mQantas Airways
Sun 8/211:20SYD - ORD
1 stop22h 29mQantas Airways
Deal found 3/12$1,471
Sun 25/113:05ORD - SYD
2 stops32h 35mAir Canada
Sun 8/211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 3/12$1,468
Mon 26/111:15ORD - SYD
2 stops29h 20mAir Canada
Sun 1/211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 3/12$1,458
Fri 30/118:40ORD - SYD
1 stop21h 20mQantas Airways
Wed 4/207:05SYD - ORD
2 stops26h 44mQantas Airways
Deal found 4/12$1,494
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 5 December 2025.
Thu 26/215:24ORD - SYD
2 stops28h 11mMultiple Airlines
Deal found 3/12$628
Sat 9/518:50ORD - SYD
2 stops47h 15mMultiple Airlines
Deal found 4/12$851
Sat 24/108:00ORD - SYD
3 stops53h 10mMultiple Airlines
Deal found 3/12$862
Thu 29/115:44ORD - SYD
3 stops45h 26mMultiple Airlines
Deal found 3/12$870
Tue 20/108:00ORD - SYD
3 stops29h 10mMultiple Airlines
Deal found 3/12$885
Mon 26/115:55ORD - SYD
3 stops45h 15mMultiple Airlines
Deal found 3/12$889
Sun 25/106:41ORD - SYD
2 stops31h 44mMultiple Airlines
Deal found 3/12$894
Wed 21/106:05ORD - SYD
3 stops32h 20mMultiple Airlines
Deal found 3/12$906
Fri 8/518:50ORD - SYD
2 stops47h 15mMultiple Airlines
Deal found 4/12$909
Thu 11/1206:50ORD - SYD
1 stop31h 35mMultiple Airlines
Deal found 2/12$913
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 5 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 5 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
Sat 31/1
15:35-14:40
2 stops30h 05m
Sydney Kingsford Smith
Sun 15/2
11:20-19:45
2 stops25h 25m
$1,544
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sat 31/1
18:40-09:00
1 stop21h 20m
Sydney Kingsford Smith
Sun 15/2
11:20-16:38
1 stop22h 18m
$1,712
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 4/3
16:30-09:00
1 stop23h 30m
Sydney Kingsford Smith
Wed 11/3
13:05-17:48
1 stop20h 43m
$1,732
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 21/1
17:16-09:15
1 stop22h 59m
Sydney Kingsford Smith
Mon 2/2
11:20-14:50
1 stop20h 30m
$1,756
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 26/1
12:45-07:00
1 stop25h 15m
Sydney Kingsford Smith
Tue 3/2
11:50-14:40
1 stop19h 50m
$1,756
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 21/1
16:16-06:20
1 stop21h 04m
Sydney Kingsford Smith
Wed 28/1
11:50-14:40
1 stop19h 50m
$1,756
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 21/1
18:30-09:05
1 stop21h 35m
Sydney Kingsford Smith
Wed 4/2
12:10-14:55
1 stop19h 45m
$1,756
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Sun 25/1
14:12-07:00
1 stop23h 48m
Sydney Kingsford Smith
Sun 1/2
12:10-14:53
1 stop19h 43m
$1,756
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Wed 18/3
14:26-06:20
1 stop23h 54m
Sydney Kingsford Smith
Sun 5/4
10:20-01:00
1 stop29h 40m
$1,757
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
Mon 16/3
18:20-09:15
1 stop22h 55m
Sydney Kingsford Smith
Tue 7/4
09:30-16:59
1 stop22h 29m
$1,757
Flights are sorted by cheapest return flights first.
Deals found on 3/12
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 28 November 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 January is currently the most expensive (average of $1,287). 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 5 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.
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 $1,291.
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 5 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 $1,712, 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 ($1,296), and Qantas Airways ($1,322) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that American Airlines is 18% 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 January is currently the most expensive (average of $1,287). 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 5 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 5 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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