$507+ Cheap flights from Sydney (SYD) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Dec 10 — Dec 171
Round-trip
1 adult, Economy
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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
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Cheapest flights from Sydney to IllinoisExplore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:00 pm -
3 stops27h 21m
Wed 11/257:49 am -
3 stops35h 46m
Deal found 11/6![Multiple Airlines logo]()
$1,148
This lastminute.com deal was found by Cheapflights users on 11/6. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:20 pm -
1 stop31h 10m
Wed 11/252:10 pm -
1 stop26h 25m
Deal found 11/6![Cathay Pacific logo]()
$1,233
This SmartFares deal was found by Cheapflights users on 11/6. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:45 am -
1 stop44h 45m
Wed 12/22:10 pm -
1 stop26h 25m
Deal found 11/6![Cathay Pacific logo]()
$1,238
This Air New Zealand deal was found by Cheapflights users on 11/6. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1911:55 am -
2 stops27h 34m
Wed 12/22:29 pm -
2 stops27h 06m
Deal found 11/6![Air New Zealand logo]()
$1,298
This Booking.com deal was found by Cheapflights users on 11/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/244:00 pm -
2 stops33h 00m
Thu 12/313:30 pm -
1 stop25h 05m
Deal found 11/9![Air Canada logo]()
$1,393
This Cathay Pacific deal was found by Cheapflights users on 11/7. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:05 am -
1 stop42h 25m
Thu 12/32:10 pm -
1 stop29h 50m
Deal found 11/7![Cathay Pacific logo]()
$1,428
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:20 pm -
1 stop31h 10m
Wed 12/27:00 am -
2 stops30h 25m
Deal found 11/6![Multiple Airlines logo]()
$1,435
This Mytrip deal was found by Cheapflights users on 11/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:15 am -
2 stops30h 38m
Thu 12/37:00 am -
2 stops30h 25m
Deal found 11/9![Multiple Airlines logo]()
$1,525
Best flights from Sydney to IllinoisDiscover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
Discover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
This Booking.com deal was found by Cheapflights users on 11/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2111:20 am -
1 stop20h 12m
Thu 1/281:55 pm -
2 stops26h 40m
Deal found 11/9![Air Canada logo]()
$973
This Cathay Pacific deal was found by Cheapflights users on 11/5. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/13:15 pm -
1 stop38h 15m
Mon 3/153:10 pm -
2 stops33h 45m
Deal found 11/5![Multiple Airlines logo]()
$1,402
This Turkish Airlines deal was found by Cheapflights users on 11/6. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/49:35 pm -
2 stops37h 45m
Mon 2/88:15 pm -
2 stops54h 10m
Deal found 11/6![Turkish Airlines logo]()
$1,595
This Cathay Pacific deal was found by Cheapflights users on 11/9. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/18:40 am -
1 stop45h 15m
Mon 5/104:15 pm -
2 stops34h 45m
Deal found 11/9![Cathay Pacific logo]()
$1,687
This BYOjet deal was found by Cheapflights users on 11/6. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/262:05 pm -
2 stops23h 32m
Fri 12/112:22 pm -
2 stops29h 28m
Deal found 11/6![Air New Zealand logo]()
$1,721
This BYOjet deal was found by Cheapflights users on 11/6. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/263:50 pm -
1 stop39h 40m
Fri 12/113:20 pm -
2 stops34h 00m
Deal found 11/6![Qatar Airways logo]()
$1,924
This Turkish Airlines deal was found by Cheapflights users on 11/5. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/189:35 pm -
2 stops37h 45m
Mon 2/228:15 pm -
2 stops54h 10m
Deal found 11/5![Turkish Airlines logo]()
$1,618
This Alaska Airlines deal was found by Cheapflights users on 11/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:40 pm -
2 stops33h 41m
Fri 12/116:47 pm -
2 stops31h 58m
Deal found 11/9![Multiple Airlines logo]()
$1,795
Last-minute flights from Sydney to IllinoisDiscover last-minute flight deals from Sydney to Illinois. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from Sydney to Illinois. Data last updated November 10, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:00 pm -
3 stops27h 21m
Wed 11/257:49 am -
3 stops35h 46m
Deal found 11/6![Multiple Airlines logo]()
$1,148
This lastminute.com deal was found by Cheapflights users on 11/6. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:20 pm -
1 stop31h 10m
Wed 11/252:10 pm -
1 stop26h 25m
Deal found 11/6![Cathay Pacific logo]()
$1,233
This Cathay Pacific deal was found by Cheapflights users on 11/7. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:05 am -
1 stop42h 25m
Thu 12/32:10 pm -
1 stop29h 50m
Deal found 11/7![Cathay Pacific logo]()
$1,428
This SmartFares deal was found by Cheapflights users on 11/6. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:45 am -
1 stop44h 45m
Wed 12/22:10 pm -
1 stop26h 25m
Deal found 11/6![Cathay Pacific logo]()
$1,238
This Air New Zealand deal was found by Cheapflights users on 11/6. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1911:55 am -
2 stops27h 34m
Wed 12/22:29 pm -
2 stops27h 06m
Deal found 11/6![Air New Zealand logo]()
$1,298
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:20 pm -
1 stop31h 10m
Wed 12/27:00 am -
2 stops30h 25m
Deal found 11/6![Multiple Airlines logo]()
$1,435
This Mytrip deal was found by Cheapflights users on 11/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:15 am -
2 stops30h 38m
Thu 12/37:00 am -
2 stops30h 25m
Deal found 11/9![Multiple Airlines logo]()
$1,525
This Booking.com deal was found by Cheapflights users on 11/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/244:00 pm -
2 stops33h 00m
Thu 12/313:30 pm -
1 stop25h 05m
Deal found 11/9![Air Canada logo]()
$1,393
One-way flights from Sydney to IllinoisSearch for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
Search for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This Trip.com deal was found by Cheapflights users on 11/9. 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.
Fri 3/52:00 pm -
2 stops34h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Multiple Airlines logo]()
$507
This Trip.com deal was found by Cheapflights users on 11/9. 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.
Thu 3/42:00 pm -
2 stops34h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Multiple Airlines logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 4/141:15 pm -
3 stops32h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Multiple Airlines logo]()
$584
This Gotogate deal was found by Cheapflights users on 11/9. 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.
Thu 3/411:30 am -
1 stop46h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Philippine Airlines logo]()
$658
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 3/296:00 pm -
3 stops53h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Multiple Airlines logo]()
$660
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 3/206:25 pm -
3 stops52h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Multiple Airlines logo]()
$685
This Booking.com deal was found by Cheapflights users on 11/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/410:20 pm -
1 stop31h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Cathay Pacific logo]()
$690
Find flight deals from Sydney to Illinois
Keep the following information in mind while searching for Sydney to Illinois flight deals. Data was last updated November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $973 (Booking.com) |
One-way from | $507 (Trip.com) |
Popular in | May |
Cheapest in | October |
Average price | $1,215 |
Cheapflights Fare Finder
Customize your flight search to find flights from Sydney to Illinois 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 7,457,451 searches. Data last updated November 10, 2026.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Sat 3/20
10:20 pm-1:30 pm
1 stop31h 10m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$755
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Sat 3/20
7:45 pm-1:30 pm
2 stops33h 45m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$935
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 1/21
11:20 am-2:32 pm
1 stop20h 12m
Chicago O'Hare Intl
Thu 1/28
1:55 pm-9:35 am
2 stops26h 40m
$973
Quickest round-trip
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Fri 12/4
9:40 pm-5:37 am
3 stops24h 57m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$988
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 4/15
8:10 pm-3:05 pm
1 stop33h 55m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$992
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 11/26
3:50 pm-2:30 pm
1 stop39h 40m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$997
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 11/26
9:40 pm-2:21 pm
2 stops33h 41m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$1,011
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Tue 2/16
7:25 pm-8:39 pm
2 stops42h 14m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$1,060
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 12/10
9:40 pm-5:37 am
3 stops24h 57m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$1,148
SydneyChicago
SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl
SYDORD
Sydney Kingsford Smith
Thu 12/17
7:35 am-2:30 pm
3 stops47h 55m
Chicago O'Hare Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$1,258
Showing 1-10 of 17 resultsSorted by cheapest first
Best time to book a flight from Sydney to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Sydney with our price prediction graph.
SYD-ORD
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 Sydney to Illinois
SYD-USIL
SYD-ORD
What is the cheapest month to book a flight from Sydney to Illinois?
Currently, October is the cheapest month in which you can book a flight from Sydney to Illinois (average of $1,063). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,589). 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 Sydney to Illinois?
Airfare is below average for this route at the moment.
Sydney to Illinois flights typically cost between $989 and $1,496 in January.The cheapest round-trip price found within the last 5 days was $973 on Air Canada (Jan 21-Jan 28).
How far ahead should I book a flight from Sydney to Illinois?
Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Sydney to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated November 10, 2026.
Get a feel of what it's like to fly with Qantas Airways and United Airlines from Sydney to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.2
Boarding
7.7
Crew
8.1
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Entertainment
7.2
Boarding
7.7
Crew
8.1
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Entertainment
7.2
Boarding
7.7
Crew
8.1
Food
7.0
Comfort
7.5
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Related info for your journey
Find useful and relevant information for your journey from Sydney to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Sydney to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Sydney to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Sydney and Illinois flights
Browse other Sydney and Illinois flight options. Last updated on November 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Sydney to Illinois flights
Consider these flights traveling from Sydney to Illinois.
Top airline flying from Sydney to Illinois
Discover the top airline that operate flights from Sydney to Illinois. 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 7,457,451 searches. Data last updated November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$970 | Average$1,633 | FlexibilityNo cancel fee | On-time74% |