Cheap flights from Chicago O'Hare Intl Airport to Sydney from $829
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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
10 tammi — 17 tammi1
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 11 joulukuu 2025.
ma 22/1216:34ORD - SYD
1 stop23h 26mQantas Airways
ke 14/119:15SYD - ORD
2 stops38h 34mQantas Airways
Deal found 10/12$1,466
to 11/1218:17ORD - SYD
2 stops27h 33mQantas Airways
to 18/1219:15SYD - ORD
2 stops35h 21mQantas Airways
Deal found 10/12$2,042
ke 31/1216:46ORD - SYD
2 stops47h 24mQantas Airways
ke 7/117:50SYD - ORD
2 stops38h 07mQantas Airways
Deal found 10/12$2,098
ke 10/1218:17ORD - SYD
2 stops27h 08mQantas Airways
ke 17/1207:05SYD - ORD
2 stops25h 57mQantas Airways
Deal found 9/12$2,107
ke 10/1218:17ORD - SYD
2 stops27h 08mQantas Airways
ti 23/1217:50SYD - ORD
2 stops40h 31mQantas Airways
Deal found 9/12$2,140
to 11/1215:11ORD - SYD
2 stops30h 54mQantas Airways
ke 24/1207:05SYD - ORD
2 stops26h 24mQantas Airways
Deal found 8/12$2,170
to 11/1215:40ORD - SYD
1 stop22h 15mAir Canada
ke 24/1211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 8/12$2,372
to 11/1213:10ORD - SYD
1 stop27h 25mAir Canada
to 18/1211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 10/12$2,435
ke 10/1215:40ORD - SYD
1 stop24h 55mAir Canada
ti 23/1211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 9/12$2,436
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 11 joulukuu 2025.
la 21/221:14ORD - SYD
2 stops43h 21mAir Canada
la 28/219:15SYD - ORD
2 stops36h 26mAir Canada
Deal found 10/12$1,671
ke 25/319:35ORD - SYD
1 stop21h 30mUnited Airlines
ma 6/409:30SYD - ORD
1 stop25h 55mUnited Airlines
Deal found 10/12$1,749
ke 11/210:35ORD - SYD
2 stops28h 55mDelta
ke 4/310:40SYD - ORD
2 stops24h 21mDelta
Deal found 9/12$1,755
ti 17/216:30ORD - SYD
1 stop23h 30mQantas Airways
pe 27/211:20SYD - ORD
1 stop22h 18mQantas Airways
Deal found 10/12$1,802
pe 20/213:12ORD - SYD
2 stops27h 23mAir Canada
to 26/211:20SYD - ORD
2 stops38h 53mAir Canada
Deal found 10/12$1,746
su 22/210:35ORD - SYD
1 stop27h 25mUnited Airlines
su 1/311:50SYD - ORD
1 stop19h 53mUnited Airlines
Deal found 10/12$1,749
su 22/315:59ORD - SYD
2 stops23h 26mDelta
su 29/310:25SYD - ORD
2 stops22h 18mDelta
Deal found 10/12$1,757
ma 26/118:30ORD - SYD
1 stop21h 35mUnited Airlines
ke 11/212:10SYD - ORD
1 stop19h 43mUnited Airlines
Deal found 9/12$1,749
to 28/510:45ORD - SYD
2 stops29h 35mAir Canada
ke 10/609:20SYD - ORD
2 stops37h 45mAir Canada
Deal found 10/12$1,764
ma 26/114:40ORD - SYD
1 stop22h 40mUnited Airlines
su 15/214:00SYD - ORD
1 stop20h 04mUnited Airlines
Deal found 9/12$1,749
ti 17/216:00ORD - SYD
1 stop22h 00mUnited Airlines
ti 24/211:20SYD - ORD
1 stop20h 25mUnited Airlines
Deal found 10/12$1,749
ke 18/214:35ORD - SYD
1 stop22h 45mUnited Airlines
su 1/314:00SYD - ORD
1 stop20h 04mUnited Airlines
Deal found 10/12$1,749
Last-minute flights from O'Hare Intl to Sydney
Discover last-minute flight deals from O'Hare Intl to Sydney. Data last updated 11 joulukuu 2025 and is based on user searches.
ti 16/1215:40ORD - SYD
1 stop24h 55mAir Canada
ti 23/1211:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 9/12$3,238
pe 19/1216:34ORD - SYD
2 stops24h 16mQantas Airways
pe 9/111:20SYD - ORD
1 stop29h 39mQantas Airways
Deal found 10/12$3,843
pe 19/1216:34ORD - SYD
1 stop21h 51mAmerican Airlines
pe 9/111:20SYD - ORD
1 stop20h 37mAmerican Airlines
Deal found 9/12$3,981
la 20/1221:04ORD - SYD
1 stop41h 21mQantas Airways
ke 7/119:15SYD - ORD
2 stops36h 42mQantas Airways
Deal found 9/12$3,686
su 21/1206:00ORD - SYD
2 stops35h 30mAir New Zealand
la 10/113:55SYD - ORD
2 stops22h 55mAir New Zealand
Deal found 9/12$2,725
su 21/1216:46ORD - SYD
1 stop21h 09mQantas Airways
ke 7/120:10SYD - ORD
2 stops37h 39mQantas Airways
Deal found 9/12$3,894
su 21/1216:46ORD - SYD
1 stop21h 09mQantas Airways
la 10/111:20SYD - ORD
1 stop29h 39mQantas Airways
Deal found 9/12$3,952
su 21/1212:30ORD - SYD
2 stops27h 00mDelta
pe 9/110:40SYD - ORD
2 stops24h 04mDelta
Deal found 9/12$4,013
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 11 joulukuu 2025.
ma 26/115:55ORD - SYD
3 stops45h 15mMultiple Airlines
Deal found 9/12$829
to 12/317:53ORD - SYD
3 stops58h 42mMultiple Airlines
Deal found 8/12$832
ma 2/215:55ORD - SYD
3 stops45h 15mMultiple Airlines
Deal found 9/12$841
ke 4/213:30ORD - SYD
2 stops47h 45mMultiple Airlines
Deal found 9/12$860
to 5/215:22ORD - SYD
3 stops45h 48mMultiple Airlines
Deal found 9/12$878
su 15/213:30ORD - SYD
2 stops47h 45mMultiple Airlines
Deal found 8/12$886
la 31/108:00ORD - SYD
3 stops53h 10mMultiple Airlines
Deal found 9/12$890
pe 6/205:40ORD - SYD
2 stops32h 45mMultiple Airlines
Deal found 9/12$929
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 11 joulukuu 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 11 joulukuu 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
la 21/2
21:14-09:35
2 stops43h 21m
Sydney Kingsford Smith
la 28/2
19:15-14:41
2 stops36h 26m
$1,671
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
pe 20/2
13:12-09:35
2 stops27h 23m
Sydney Kingsford Smith
to 26/2
11:20-09:13
2 stops38h 53m
$1,746
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ke 25/3
19:35-09:05
1 stop21h 30m
Sydney Kingsford Smith
ma 6/4
09:30-20:25
1 stop25h 55m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
su 22/2
10:35-07:00
1 stop27h 25m
Sydney Kingsford Smith
su 1/3
11:50-14:43
1 stop19h 53m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ma 26/1
18:30-09:05
1 stop21h 35m
Sydney Kingsford Smith
ke 11/2
12:10-14:53
1 stop19h 43m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ma 26/1
14:40-06:20
1 stop22h 40m
Sydney Kingsford Smith
su 15/2
14:00-17:04
1 stop20h 04m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ti 17/2
16:00-07:00
1 stop22h 00m
Sydney Kingsford Smith
ti 24/2
11:20-14:45
1 stop20h 25m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ke 18/2
14:35-06:20
1 stop22h 45m
Sydney Kingsford Smith
su 1/3
14:00-17:04
1 stop20h 04m
$1,749
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
ke 11/2
10:35-08:30
2 stops28h 55m
Sydney Kingsford Smith
ke 4/3
10:40-18:01
2 stops24h 21m
$1,755
ChicagoSydney
ORD - SYD
ORDSYD
Chicago O'Hare Intl
su 22/3
15:59-07:25
2 stops23h 26m
Sydney Kingsford Smith
su 29/3
10:25-16:43
2 stops22h 18m
$1,757
Flights are sorted by cheapest return flights first.
Deals found on 9/12
Showing 1-10 of 22 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 5 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 $298). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $1,280). 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 11 joulukuu 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 $1,284.
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 11 joulukuu 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 $1,749, Air Canada can have you in Sydney from Chicago O'Hare Intl Airport in 21h 30m. 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 ($1,289), and Qantas Airways ($1,314) 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 $298). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $1,280). 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 11 joulukuu 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 11 joulukuu 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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