Cheap flights from Sydney to Chicago O'Hare Intl Airport from $678
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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
27 Dec — 3 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Sydney Kingsford Smith to Chicago O'Hare Intl are usually found in February or May, booked 78 days in advance, depart on a Monday or Thursday and return on a Friday
Cheap flight deals from Sydney to O'Hare Intl
Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to O'Hare Intl (ORD). 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 27 November 2025.
Explore the most affordable flight options available from Sydney to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 November 2025.
Thu 25/1214:15SYD - ORD
2 stops36h 10mDelta
Fri 23/106:50ORD - SYD
2 stops32h 40mDelta
Deal found 26/11$1,876
Thu 25/1217:45SYD - ORD
1 stop30h 14mAmerican Airlines
Fri 23/115:10ORD - SYD
1 stop24h 50mAmerican Airlines
Deal found 26/11$1,936
Thu 25/1211:20SYD - ORD
1 stop21h 29mMultiple Airlines
Sat 10/109:15ORD - SYD
2 stops30h 45mMultiple Airlines
Deal found 26/11$1,971
Thu 25/1211:20SYD - ORD
1 stop22h 31mQantas Airways
Sat 10/119:40ORD - SYD
1 stop41h 30mQantas Airways
Deal found 26/11$2,086
Wed 17/1217:30SYD - ORD
2 stops29h 35mMultiple Airlines
Fri 2/105:00ORD - SYD
2 stops33h 25mMultiple Airlines
Deal found 26/11$2,129
Thu 25/1212:10SYD - ORD
2 stops21h 49mUnited Airlines
Sat 10/112:53ORD - SYD
2 stops27h 22mUnited Airlines
Deal found 26/11$2,169
Thu 25/1216:00SYD - ORD
2 stops45h 10mAir Canada
Sat 10/115:35ORD - SYD
1 stop22h 20mAir Canada
Deal found 26/11$2,203
Mon 15/1217:45SYD - ORD
1 stop23h 14mQantas Airways
Tue 30/1216:34ORD - SYD
1 stop23h 26mQantas Airways
Deal found 25/11$2,206
Mon 15/1217:45SYD - ORD
1 stop29h 20mMultiple Airlines
Tue 30/1209:34ORD - SYD
3 stops34h 51mMultiple Airlines
Deal found 25/11$2,209
Best flights from Sydney to O'Hare Intl
Discover carefully curated flight deals from Sydney to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 November 2025.
Sat 16/509:10SYD - ORD
1 stop29h 49mAmerican Airlines
Sat 6/622:17ORD - SYD
1 stop41h 48mAmerican Airlines
Deal found 26/11$1,551
Sat 16/511:55SYD - ORD
2 stops25h 47mAir New Zealand
Sat 6/616:40ORD - SYD
2 stops25h 05mAir New Zealand
Deal found 25/11$1,830
Thu 25/1214:15SYD - ORD
2 stops36h 10mDelta
Fri 23/106:50ORD - SYD
2 stops32h 40mDelta
Deal found 26/11$1,876
Thu 21/509:20SYD - ORD
2 stops37h 38mAir Canada
Thu 28/508:40ORD - SYD
3 stops31h 40mAir Canada
Deal found 25/11$1,966
Thu 25/1211:20SYD - ORD
1 stop21h 29mMultiple Airlines
Sat 10/109:15ORD - SYD
2 stops30h 45mMultiple Airlines
Deal found 26/11$1,971
Sat 16/509:10SYD - ORD
1 stop21h 46mQantas Airways
Sat 6/618:45ORD - SYD
1 stop21h 20mQantas Airways
Deal found 25/11$2,073
Thu 25/1217:45SYD - ORD
1 stop30h 14mAmerican Airlines
Fri 23/115:10ORD - SYD
1 stop24h 50mAmerican Airlines
Deal found 26/11$1,936
Wed 17/1217:30SYD - ORD
2 stops29h 35mMultiple Airlines
Fri 2/105:00ORD - SYD
2 stops33h 25mMultiple Airlines
Deal found 26/11$2,129
Mon 15/1217:45SYD - ORD
1 stop23h 14mQantas Airways
Tue 30/1216:34ORD - SYD
1 stop23h 26mQantas Airways
Deal found 25/11$2,206
Sun 26/415:00SYD - ORD
3 stops46h 59mMultiple Airlines
Wed 29/417:00ORD - SYD
2 stops45h 55mMultiple Airlines
Deal found 26/11$2,152
Last-minute flights from Sydney to O'Hare Intl
Discover last-minute flight deals from Sydney to O'Hare Intl. Data last updated 27 November 2025 and is based on user searches.
Wed 17/1217:30SYD - ORD
2 stops29h 35mMultiple Airlines
Fri 2/105:00ORD - SYD
2 stops33h 25mMultiple Airlines
Deal found 26/11$2,129
Thu 25/1214:15SYD - ORD
2 stops36h 10mDelta
Fri 23/106:50ORD - SYD
2 stops32h 40mDelta
Deal found 26/11$1,876
Thu 25/1211:20SYD - ORD
1 stop22h 31mAmerican Airlines
Fri 23/111:44ORD - SYD
2 stops27h 31mAmerican Airlines
Deal found 27/11$1,910
Thu 25/1211:20SYD - ORD
1 stop21h 13mQantas Airways
Fri 23/111:56ORD - SYD
1 stop25h 59mQantas Airways
Deal found 27/11$1,914
Thu 25/1211:20SYD - ORD
1 stop21h 29mMultiple Airlines
Sat 10/109:15ORD - SYD
2 stops30h 45mMultiple Airlines
Deal found 26/11$1,971
Thu 25/1211:20SYD - ORD
1 stop22h 31mQantas Airways
Sat 10/119:40ORD - SYD
1 stop41h 30mQantas Airways
Deal found 26/11$2,086
Thu 25/1212:10SYD - ORD
2 stops21h 49mUnited Airlines
Sat 10/112:53ORD - SYD
2 stops27h 22mUnited Airlines
Deal found 26/11$2,169
Thu 25/1216:00SYD - ORD
2 stops45h 10mAir Canada
Sat 10/115:35ORD - SYD
1 stop22h 20mAir Canada
Deal found 26/11$2,203
One-way flights from Sydney to O'Hare Intl
Search for one-way flight options from Sydney to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 27 November 2025.
Fri 5/1214:00SYD - ORD
2 stops27h 13mMultiple Airlines
Deal found 26/11$678
Sat 6/1208:30SYD - ORD
2 stops38h 35mMultiple Airlines
Deal found 26/11$1,064
Tue 10/211:20SYD - ORD
2 stops25h 50mAir Canada
Deal found 26/11$1,129
Sun 30/1115:25SYD - ORD
3 stops50h 34mMultiple Airlines
Deal found 25/11$1,339
Mon 1/1217:00SYD - ORD
2 stops24h 59mMultiple Airlines
Deal found 25/11$1,398
Cheapflights Fare Finder
Customise your flight search to find flights from Sydney to O'Hare Intl 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 27 November 2025.
Use the filters below to find and compare flights from Sydney to Chicago O'Hare Intl Airport that are best for you.
Fly from
Sydney
Fly to
O'Hare Intl
Route
Depart
Return
Price
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 16/5
09:10-23:59
1 stop29h 49m
Chicago O'Hare Intl
Sat 6/6
22:17-07:05
1 stop41h 48m
$1,551
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 16/5
11:55-22:42
2 stops25h 47m
Chicago O'Hare Intl
Sat 6/6
16:40-08:45
2 stops25h 05m
$1,830
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Thu 25/12
14:15-09:25
2 stops36h 10m
Chicago O'Hare Intl
Fri 23/1
06:50-08:30
2 stops32h 40m
$1,876
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Thu 25/12
17:45-06:59
1 stop30h 14m
Chicago O'Hare Intl
Fri 23/1
15:10-09:00
1 stop24h 50m
$1,936
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Thu 21/5
09:20-07:58
2 stops37h 38m
Chicago O'Hare Intl
Thu 28/5
08:40-07:20
3 stops31h 40m
$1,966
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Thu 25/12
11:20-15:49
1 stop21h 29m
Chicago O'Hare Intl
Sat 10/1
09:15-09:00
2 stops30h 45m
$1,971
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sat 16/5
09:10-15:56
1 stop21h 46m
Chicago O'Hare Intl
Sat 6/6
18:45-07:05
1 stop21h 20m
$2,073
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Wed 17/12
17:30-06:05
2 stops29h 35m
Chicago O'Hare Intl
Fri 2/1
05:00-07:25
2 stops33h 25m
$2,129
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Sun 26/4
15:00-22:59
3 stops46h 59m
Chicago O'Hare Intl
Wed 29/4
17:00-05:55
2 stops45h 55m
$2,152
SydneyChicago
SYD - ORD
SYDORD
Sydney Kingsford Smith
Mon 15/12
17:45-23:59
1 stop23h 14m
Chicago O'Hare Intl
Tue 30/12
16:34-09:00
1 stop23h 26m
$2,206
Flights are sorted by cheapest return flights first.
Deals found on 26/11
Showing 1-10 of 15 results
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Best time to book a flight from Sydney to O'Hare Intl
Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Sydney 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 Sydney to Chicago O'Hare Intl Airport
Prices
More
How far ahead should I book a flight from Sydney to Chicago O'Hare Intl Airport?
Use this chart to determine the optimal time to book a return flight from Sydney to O'Hare Intl. Price data was last updated on 21 November 2025.
The best time to book flights from Sydney to Chicago O'Hare Intl Airport is 78 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 Sydney to Chicago O'Hare Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Sydney to Chicago O'Hare Intl Airport (average of $953). Flying from Sydney to Chicago O'Hare Intl Airport in December is currently the most expensive (average of $1,610). 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 SYD to ORD?
Find hourly flight availability from Sydney to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 November 2025.
It’s optimal to fly from Sydney to Chicago O'Hare Intl Airport in the afternoon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.
What is the cheapest day to fly from Sydney to Chicago O'Hare Intl Airport?
Use this chart to determine the cheapest time to fly return from Sydney to O'Hare Intl. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their Sydney to Chicago O'Hare Intl Airport flight should consider departing on Monday at midday when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight from Sydney to Chicago O'Hare Intl Airport?
What’s the top stopover airport for flights from Sydney to Chicago O'Hare Intl Airport?
Share of one-stop return flights from Sydney to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 74% of one-stop itineraries from Sydney to Chicago O'Hare Intl Airport on Cheapflights.
What’s the cheapest stopover airport for flights from Sydney to Chicago O'Hare Intl Airport?
Average return fare for one-stop flights from Sydney to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Los Angeles (LAX) is the most affordable one-stop option, with an average return flight price of $1,556.
What’s the fastest stopover option from Sydney to Chicago O'Hare Intl Airport?
Shortest average travel time for one-stop one-way flights from Sydney to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 20h 30m.
Which airport typically offers the quickest stopover for flights from Sydney to Chicago O'Hare Intl Airport?
Average stopover duration for one-stop one-way flights from Sydney to Chicago O'Hare Intl Airport, 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 2h 14m.
Reviews of airlines servicing O'Hare Intl
Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 27 November 2025.
Check out reviews from past customers who have flown with Air New Zealand, Qantas Airways, andUnited Airlines from Sydney to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
The seat I sat in the Auckland Airport at A waiting to board gate 42. Not far from the check in desk was dripping rain on me. When I looked up you could see on the beam discoloured drips. I forgot to say something to someone before boarding.
Related info for your journey
Find useful and relevant information for your journey from Sydney to O'Hare Intl. 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 from for flights from Sydney to Chicago O'Hare Intl?
For a flight from Sydney to Chicago O'Hare Intl, you will be flying from Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre of the city. Kingsford Smith is the only Sydney airport and it handles 0 outbound flights to Chicago O'Hare Intl per day. 6 airlines have flights to Chicago O'Hare Intl from Sydney Kingsford Smith on a regular basis.
How long is the flight from Sydney to Chicago O'Hare Intl Airport?
There are many flights that can get you from Sydney to Chicago O'Hare Intl Airport in 25h 47m. Fly via American Airlines, Air New Zealand, or Delta to get the fastest option. Airlines will cover a distance of 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 Sydney to Chicago O'Hare Intl Airport round-trip?
Qantas Airways, at $1,011, was found to be the cheapest airline from Sydney to Chicago O'Hare Intl Airport.Alternate airlines to your destination round-trip include American Airlines and Air Canada. These flights start at 32% lower than the current average price 3 months from now.
Can I find deals for business class flights from Sydney to O'Hare Intl?
Yes. Cheapflights offers flight deals from Sydney to O'Hare Intl 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 Sydney to Chicago O'Hare Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Sydney to Chicago O'Hare Intl Airport (average of $953). Flying from Sydney to Chicago O'Hare Intl Airport in December is currently the most expensive (average of $1,610). 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 O'Hare Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 27 November 2025.
Discover the top 6 airlines that operate flights from Sydney to O'Hare Intl. 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 27 November 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 Sydney to O'Hare Intl?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to O'Hare Intl from Sydney today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Sydney to O'Hare Intl?
Millions of users choose and trust Cheapflights to book the best flight deals from Sydney to O'Hare Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Sydney to O'Hare Intl with no change fees?
Certainly. Search results for flights to O'Hare Intl from Sydney shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Sydney to O'Hare Intl become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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