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Illinois

$701+ Cheap flights from Sydney (SYD) to Illinois

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap flight deals from Sydney to Illinois

Cheapest flights from Sydney to Illinois
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 March 22, 2026.

This Gotogate deal was found by Cheapflights users on 3/18. 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 4/169:20 am
SYD
-
ORD
1 stop20h 25m
Air Canada
Wed 4/298:40 am
ORD
-
SYD
2 stops31h 40m
Air Canada
Deal found 3/18$899
This Trip.com deal was found by Cheapflights users on 3/18. 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.
Sun 5/31:15 pm
SYD
-
ORD
2 stops31h 20m
Multiple Airlines
Sun 5/105:15 am
ORD
-
SYD
2 stops39h 35m
Multiple Airlines
Deal found 3/18$900
This Gotogate deal was found by Cheapflights users on 3/21. 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.
Tue 5/59:20 am
SYD
-
ORD
2 stops44h 33m
Air Canada
Tue 5/123:40 pm
ORD
-
SYD
1 stop24h 40m
Air Canada
Deal found 3/21$901
This Gotogate deal was found by Cheapflights users on 3/18. 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 4/169:20 am
SYD
-
ORD
2 stops25h 45m
Air Canada
Thu 4/238:40 am
ORD
-
SYD
2 stops31h 40m
Air Canada
Deal found 3/18$902
This Gotogate deal was found by Cheapflights users on 3/19. 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.
Mon 5/49:20 am
SYD
-
ORD
1 stop20h 25m
Air Canada
Mon 5/118:45 am
ORD
-
SYD
2 stops31h 35m
Air Canada
Deal found 3/19$904
This Air Canada deal was found by Cheapflights users on 3/21. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
-
STL
2 stops41h 46m
Air Canada
Thu 5/281:05 pm
STL
-
SYD
2 stops27h 15m
Air Canada
Deal found 3/21$944
This Air Canada deal was found by Cheapflights users on 3/20. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
-
STL
2 stops41h 46m
Multiple Airlines
Thu 5/281:38 pm
STL
-
SYD
2 stops26h 42m
Multiple Airlines
Deal found 3/20$945
This Gotogate deal was found by Cheapflights users on 3/19. 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 5/149:20 am
SYD
-
STL
2 stops41h 46m
Air Canada
Sun 6/77:05 am
STL
-
SYD
2 stops57h 15m
Air Canada
Deal found 3/19$948
This Air Canada deal was found by Cheapflights users on 3/18. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2311:20 am
SYD
-
STL
2 stops45h 10m
Air Canada
Tue 12/11:30 pm
STL
-
SYD
2 stops24h 25m
Air Canada
Deal found 3/18$1,034
This Air Canada deal was found by Cheapflights users on 3/18. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2111:20 am
SYD
-
STL
2 stops22h 06m
Air Canada
Wed 12/24:15 pm
STL
-
SYD
2 stops45h 40m
Air Canada
Deal found 3/18$1,040
This Trip.com deal was found by Cheapflights users on 3/21. 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.
Tue 5/55:50 pm
SYD
-
MDW
2 stops32h 19m
Multiple Airlines
Tue 5/126:00 am
MDW
-
SYD
2 stops34h 05m
Multiple Airlines
Deal found 3/21$1,126
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:15 am
SYD
-
MDW
2 stops23h 43m
Delta
Wed 4/291:24 pm
MDW
-
SYD
2 stops26h 26m
Delta
Deal found 3/20$1,172

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$899
(Gotogate)

One-way from

$701
(BYOjet)

Popular in

December

Cheapest in

August

Average price

$1,112
Provider with most accurate pricing for Sydney Kingsford Smith-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Chicago (CHI) flights.
Search Deals
From Sydney Kingsford Smith to Illinois
Search Deals
One-way flight from Sydney Kingsford Smith to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 2,558,603 searches. Data last updated March 22, 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

Price

Cheapest round-trip

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Thu 5/28

1:05 pm-7:20 am

3 stops51h 15m

$1,003

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 5/1

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Fri 5/8

2:35 pm-7:20 am

2 stops25h 45m

$1,139

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Wed 6/17

9:15 am-8:37 am

2 stops38h 22m

Chicago Midway

Sun 7/12

9:49 am-6:50 am

2 stops30h 01m

$1,173

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 5/12

9:15 am-6:33 pm

2 stops24h 18m

Chicago Midway

Tue 5/26

1:22 pm-6:50 am

2 stops26h 28m

$1,173

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/23

10:20 am-6:17 pm

1 stop22h 57m

Lambert-St Louis

Sun 8/16

1:36 pm-7:00 am

2 stops26h 24m

$1,177

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 5/4

9:15 am-5:58 pm

2 stops23h 43m

Chicago Midway

Mon 5/11

12:53 pm-6:50 am

2 stops26h 57m

$1,177

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 6/18

9:10 am-7:58 pm

1 stop25h 48m

Chicago O'Hare Intl

Wed 7/22

8:59 am-7:30 am

1 stop31h 31m

$1,200

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 6/22

9:10 am-9:45 pm

1 stop27h 35m

Chicago O'Hare Intl

Mon 7/20

7:01 pm-7:30 am

1 stop21h 29m

$1,200

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

9:10 am-11:59 pm

1 stop29h 49m

Lambert-St Louis

Thu 5/28

5:18 pm-7:05 am

2 stops22h 47m

$1,202

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 5/16

9:20 am-8:00 am

3 stops37h 40m

Chicago O'Hare Intl

Sat 6/6

11:05 am-7:20 am

3 stops29h 15m

$1,210

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 53 resultsSorted by cheapest first
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6

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.
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

What is the cheapest month to book a flight from Sydney to Illinois?

Currently, April is the cheapest month in which you can book a flight from Sydney to Illinois (average of $670). Flying from Sydney to Illinois in January is currently the most expensive (average of $1,315). 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?

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 March 22, 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.
Qantas Airways
7.5
Good
1,007 reviews

Comfort

7.4

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Qantas Airways
7.5
Good
1,007 reviews
Qantas Airways
7.5
Good
1,007 reviews

Comfort

7.4

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
United Airlines
7.4
Good
9,459 reviews
Qantas Airways
7.5
Good
1,007 reviews

Comfort

7.4

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.

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.

  • What airport do you fly from for flights from Sydney to Illinois?

    Sydney Kingsford Smith (SYD), located 4.6 mi from the city center, is the airport you fly out of when you book flights from Sydney to Illinois.

  • How long is the flight from Sydney to Illinois?

    Airlines like Air Canada, Delta, and United Airlines fly from Sydney to Illinois in about 22h 57m. The time it takes to get you to your destination can typically vary by up to 18h 49m. Sydney and Illinois are separated by a distance of 9054 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Sydney to Illinois one-way?

    $469 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and Qantas Airways, with prices starting from $530 and $796, respectively.

  • What are the most popular routes from Sydney to Illinois?

    The most popular flight routes from Sydney to Illinois are Sydney Kingsford Smith - Chicago O'Hare Intl, Sydney Kingsford Smith - Chicago Midway and Sydney Kingsford Smith - Lambert-St Louis.

  • Can I find deals for flights from Sydney to Illinois that include hotel bookings?

    Yes. In addition to deals on Sydney to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sydney to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Illinois.

  • Can I find deals for business class flights from Sydney to Illinois?

    Yes. Cheapflights offers flight deals from Sydney to Illinois 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 Illinois?

    Currently, April is the cheapest month in which you can book a flight from Sydney to Illinois (average of $670). Flying from Sydney to Illinois in January is currently the most expensive (average of $1,315). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Sydney to Illinois

Discover the top 2 airlines 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 2,558,603 searches. Data last updated March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$795Average$1,279FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$970Average$1,012FlexibilityNo cancel feeOn-time74%

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