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Cheap flights from Sydney to Illinois from $721

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
11 Apr — 18 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Sydney to Illinois

Enter your travel dates to find the best prices.

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 12 March 2026.

Sat 25/413:15
SYD
-
ORD
2 stops31h 20m
Multiple Airlines
Sat 2/515:00
ORD
-
SYD
2 stops29h 50m
Multiple Airlines
Deal found 11/3$1,272
Tue 21/413:15
SYD
-
ORD
2 stops25h 12m
Multiple Airlines
Fri 24/414:00
ORD
-
SYD
2 stops41h 10m
Multiple Airlines
Deal found 11/3$1,415
Mon 11/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Mon 1/612:44
ORD
-
SYD
2 stops32h 21m
Multiple Airlines
Deal found 8/3$1,418
Fri 5/611:55
SYD
-
ORD
2 stops26h 20m
Air New Zealand
Fri 19/616:30
ORD
-
SYD
2 stops25h 15m
Air New Zealand
Deal found 8/3$1,422
Tue 2/611:55
SYD
-
ORD
2 stops26h 21m
Air New Zealand
Fri 19/616:30
ORD
-
SYD
2 stops25h 15m
Air New Zealand
Deal found 12/3$1,448
Tue 4/811:55
SYD
-
ORD
2 stops26h 21m
Air New Zealand
Mon 24/816:20
ORD
-
SYD
2 stops25h 25m
Air New Zealand
Deal found 10/3$1,495
Fri 24/411:55
SYD
-
ORD
2 stops26h 33m
Air New Zealand
Fri 1/515:45
ORD
-
SYD
2 stops26h 00m
Air New Zealand
Deal found 9/3$1,502
Tue 5/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Tue 26/512:44
ORD
-
SYD
2 stops32h 06m
Multiple Airlines
Deal found 8/3$1,529
Wed 5/811:55
SYD
-
STL
2 stops37h 12m
Air New Zealand
Sat 29/815:02
STL
-
SYD
2 stops26h 43m
Air New Zealand
Deal found 9/3$1,561
Sat 8/809:55
SYD
-
STL
2 stops25h 47m
Air New Zealand
Mon 31/808:52
STL
-
SYD
2 stops32h 53m
Air New Zealand
Deal found 9/3$1,642
Wed 5/811:55
SYD
-
STL
3 stops27h 02m
Multiple Airlines
Sat 29/815:02
STL
-
SYD
2 stops28h 38m
Multiple Airlines
Deal found 11/3$1,698
Sun 3/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Sun 17/507:05
STL
-
SYD
2 stops57h 15m
Air Canada
Deal found 8/3$1,744

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 12 March 2026.

Round-trip from

$1,272

One-way from

$721

Popular in

December

Cheapest in

August

Average price

$1,554
25/4-2/5
  • 25/4-2/5
  • 4 total stops
  • 61h 10m total
  • Sydney to Illinois
Search Deals
19/8
  • 19/8
  • 3 total stops
  • 48h 33m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($103 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 12 March 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 return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 16/5

11:55-00:45

2 stops27h 50m

Chicago O'Hare Intl

Sat 6/6

16:45-08:45

2 stops25h 00m

$1,600

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 17/5

07:05-07:20

2 stops57h 15m

$1,744

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

11:55-23:57

3 stops27h 02m

Lambert-St Louis

Sat 29/8

15:02-08:45

2 stops26h 43m

$1,752

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

11:55-10:07

2 stops37h 12m

Lambert-St Louis

Mon 31/8

15:02-08:45

2 stops26h 43m

$1,898

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-20:43

2 stops26h 23m

Lambert-St Louis

Sun 31/5

05:10-07:20

2 stops35h 10m

$1,921

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 22/6

09:15-23:45

1 stop29h 30m

Chicago O'Hare Intl

Sun 19/7

18:30-06:50

1 stop21h 20m

$2,064
Fastest return journey

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 22/6

17:50-00:30

2 stops21h 40m

Chicago O'Hare Intl

Sun 19/7

19:01-07:05

1 stop21h 04m

$2,104

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 18/6

09:15-07:26

2 stops37h 11m

Chicago O'Hare Intl

Sun 12/7

18:30-06:50

1 stop21h 20m

$2,110

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 21/6

09:15-17:30

1 stop23h 15m

Chicago O'Hare Intl

Sun 19/7

07:15-06:50

2 stops32h 35m

$2,145

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Fri 10/7

09:15-18:05

2 stops23h 50m

Chicago Midway

Sun 26/7

13:00-06:50

2 stops26h 50m

$2,180

Flights are sorted by cheapest return flights first.

Deals found on 7/3

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 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 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 $933). Flying from Sydney to Illinois in January is currently the most expensive (average of $1,837). 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 for a return flight 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 12 March 2026.
Read through reviews of airlines operating flights from Sydney to Illinois, such as Air New Zealand,Qantas Airways, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air New Zealand
8.0
Very Good
610 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Qantas Airways
7.5
Good
1,004 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
United Airlines
7.4
Good
9,418 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
American Airlines
7.1
Good
11,432 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air Canada
7.1
Good
10,800 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.4

Boarding

8.2

Overall

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.

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?

    If you book a flight to Illinois from Sydney, you will be flying from Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney.

  • How long is the flight from Sydney to Illinois?

    Departing from Sydney to Illinois will take you 29h 30m. The distance between Sydney and Illinois 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 to fly from Sydney to Illinois one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $178. However, be on the lookout for offers from Qantas Airways and Air Canada, as they are both options that can get you from Sydney to Illinois for a low price.

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

    The most popular route from Sydney to Illinois is Sydney Kingsford Smith - Chicago O'Hare Intl. You may also consider Sydney Kingsford Smith - Chicago Midway or 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 holiday 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 $933). Flying from Sydney to Illinois in January is currently the most expensive (average of $1,837). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Sydney to Illinois

Discover the top 6 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 647,157 searches. Data last updated 12 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$975Average$1,499FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,059Average$1,518FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,090Average$1,137FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air New ZealandCheapest$1,322Average$1,478FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,382Average$1,971FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
ANACheapest$1,468Average$1,584FlexibilityNo cancel feeOn-time80%
Search ANA flights

Fly with Cheapflights

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 Illinois?

When you search for this flight from Sydney to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Sydney to Illinois?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Sydney to Illinois.

Can Cheapflights find flights from Sydney to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Sydney to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from Sydney to Illinois 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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