What is the cheapest airline that flies from Sydney Kingsford Smith to Illinois?

Delta is the most popular carrier operating from Sydney Kingsford Smith to Illinois

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Illinois?

Prices for flights from Sydney Kingsford Smith Airport to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?

As of November 2026, there is 1 operator available to choose from for flights from Sydney Kingsford Smith Airport to Illinois.

How old do you have to be to fly from Sydney Kingsford Smith Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$431 Cheap Flights from Sydney to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sydney to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:20 am - 10:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 35m1 stop Los Angeles

6:46 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 14m1 stop Los Angeles

$735American Airlines

Thu, Feb 18 - Mon, Feb 22

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

7:45 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 45m1 stop Los Angeles

$739Delta

Mon, Nov 16 - Mon, Nov 30

9:15 am - 4:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 22m2 stops Los Angeles Atlanta Hartsfield-Jackson

5:55 pm - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

45h 55m2 stops Atlanta Hartsfield-Jackson Los Angeles

$739Delta

Mon, Apr 26 - Sat, May 8

11:10 am - 4:05 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 55m1 stop Los Angeles

9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$757Qantas Airways

Mon, Nov 16 - Mon, Nov 30

2:05 pm - 2:18 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 13m1 stop Dallas/Fort Worth

4:59 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 01m1 stop Los Angeles

$767Qantas Airways

Thu, Feb 18 - Mon, Feb 22

10:20 am - 4:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 35m1 stop Los Angeles

8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 40m1 stop Los Angeles

$769Qantas Airways

Tue, Apr 27 - Sat, May 8

12:00 pm - 7:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 55m1 stop Dallas/Fort Worth

8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 40m1 stop Los Angeles

$769Qantas Airways

Mon, Apr 26 - Sat, May 8

11:15 am - 4:42 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 27m1 stop Los Angeles

5:15 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 45m1 stop Los Angeles

$782Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

11:10 am - 11:40 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

29h 30m2 stops Los Angeles Phoenix Sky Harbor Intl

6:00 am - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 00m1 stop Los Angeles

$784American Airlines

Sat, Dec 26 - Tue, Jan 19

11:10 am - 6:34 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 24m2 stops Los Angeles Las Vegas Harry Reid Intl

6:00 am - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 00m1 stop Los Angeles

$784American Airlines

Sun, Dec 27 - Tue, Jan 19

Cheap last minute flights

Enter your travel dates to find the best prices.

11:10 am - 5:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 49m1 stop Los Angeles

9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$736American Airlines

Mon, Nov 9 - Mon, Nov 23

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

7:30 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

32h 00m2 stops Salt Lake City Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

2:32 pm - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 58m1 stop Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

10:40 am - 9:47 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 07m2 stops Los Angeles Salt Lake City

11:19 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 11m2 stops Detroit Metropolitan Wayne County Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

12:05 pm - 12:35 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi

$1,090Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

12:05 pm - 12:35 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi

$1,096Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

10:25 am - 1:35 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 10m2 stops Tokyo Narita Shanghai Pu Dong

$1,871Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

7:00 am - 5:00 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 00m3 stops Melbourne Brisbane Los Angeles

3:51 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 09m2 stops Dallas/Fort Worth Los Angeles

$2,578Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

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Cathay Pacific flights from Sydney to Illinois

Our best Cathay Pacific deals on Sydney to Illinois flight tickets

Cathay Pacific

Feb 18

SYD8:45 amSydney Kingsford Smith

44h 45m

1 stop

ORD12:30 pmChicago O'Hare Intl

Feb 22

ORD2:10 pmChicago O'Hare Intl

37h 40m

1 stop

SYD8:50 pmSydney Kingsford Smith

$1,288

Cathay Pacific

Feb 18

SYD8:45 amSydney Kingsford Smith

44h 45m

1 stop

ORD12:30 pmChicago O'Hare Intl

Feb 22

ORD2:10 pmChicago O'Hare Intl

37h 40m

1 stop

SYD8:50 pmSydney Kingsford Smith

$1,296

Cathay Pacific

Nov 16

SYD10:20 pmSydney Kingsford Smith

31h 10m

1 stop

ORD12:30 pmChicago O'Hare Intl

Dec 3

ORD2:10 pmChicago O'Hare Intl

37h 40m

1 stop

SYD8:50 pmSydney Kingsford Smith

$1,438

Delta flights from Sydney to Illinois

Our best Delta deals on Sydney to Illinois flight tickets

Delta

Nov 9

SYD10:40 amSydney Kingsford Smith

28h 07m

2 stops

ORD9:47 pmChicago O'Hare Intl

Nov 23

ORD11:19 amChicago O'Hare Intl

28h 11m

2 stops

SYD8:30 amSydney Kingsford Smith

$739

Delta

Apr 26

SYD9:15 amSydney Kingsford Smith

39h 47m

2 stops

ORD10:02 amChicago O'Hare Intl

May 7

ORD1:35 pmChicago O'Hare Intl

26h 15m

2 stops

SYD6:50 amSydney Kingsford Smith

$788

Delta

Apr 23

SYD9:15 amSydney Kingsford Smith

27h 38m

2 stops

ORD9:53 pmChicago O'Hare Intl

May 6

ORD9:30 amChicago O'Hare Intl

30h 20m

2 stops

SYD6:50 amSydney Kingsford Smith

$838

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 2/18

11:20 am-10:55 pm

1 stop28h 35m

Chicago O'Hare Intl

Mon 2/22

6:46 pm-9:00 am

1 stop21h 14m

$735

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 11/16

10:40 am-11:55 pm

1 stop30h 15m

Chicago O'Hare Intl

Mon 11/30

7:45 am-8:30 am

1 stop31h 45m

$739

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 4/26

9:15 am-4:37 pm

2 stops46h 22m

Chicago O'Hare Intl

Sat 5/8

5:55 pm-6:50 am

2 stops45h 55m

$739

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 11/16

11:10 am-4:05 pm

1 stop21h 55m

Chicago O'Hare Intl

Mon 11/30

9:03 pm-9:00 am

1 stop42h 57m

$757

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 2/18

2:05 pm-2:18 pm

1 stop41h 13m

Chicago O'Hare Intl

Mon 2/22

4:59 pm-9:00 am

1 stop23h 01m

$767

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 4/27

10:20 am-4:55 pm

1 stop21h 35m

Chicago O'Hare Intl

Sat 5/8

8:50 pm-6:30 am

1 stop42h 40m

$769

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 4/26

12:00 pm-7:55 pm

1 stop22h 55m

Chicago O'Hare Intl

Sat 5/8

8:50 pm-6:30 am

1 stop42h 40m

$769

Quickest round-trip

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 11/26

11:15 am-4:42 pm

1 stop22h 27m

Chicago O'Hare Intl

Thu 12/3

5:15 pm-9:00 am

1 stop22h 45m

$782

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 12/26

11:10 am-11:40 pm

2 stops29h 30m

Chicago O'Hare Intl

Tue 1/19

6:00 am-9:00 am

1 stop34h 00m

$784

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 12/27

11:10 am-6:34 pm

2 stops24h 24m

Chicago O'Hare Intl

Tue 1/19

6:00 am-9:00 am

1 stop34h 00m

$784

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sydney to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Sydney is in October. Flight prices, which tend to average around $1,063, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $1,134.

How far in advance should I book a flight from Sydney to Illinois?

You are more likely to see cheaper flights to Illinois from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,466 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Sydney for as low as $875 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 32% on your flight if you consider stops on a Sydney to Illinois flight.

Cheap Sydney to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to Illinois

Best Price Found	$431
Fastest flight time	21h 42m
Direct flights	None

The best one-way flight to Illinois from Sydney in the past 72 hours is $431. The best round-trip flight deal from Sydney to Illinois found on momondo in the last 72 hours is $735.

The fastest flight from Sydney to Illinois takes 21h 42m

There are no direct flights from Sydney to Illinois. There are no popular flight routes from Sydney to Illinois.

Search flight deals

Frequently asked questions about flying from Sydney to Illinois

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Illinois?
Prices for flights from Sydney Kingsford Smith Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?
As of November 2026, there is 1 operator available to choose from for flights from Sydney Kingsford Smith Airport to Illinois.
How old do you have to be to fly from Sydney Kingsford Smith Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Sydney to Illinois

Compare and see reviews for airlines that fly from Sydney to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Qantas Airways	PriceFrom $970	Free Cancellation	Rating 7.5 1,122 reviews		Search Qantas Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Sydney to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Sydney to Illinois for you.

Can I find flights from Sydney to Illinois with flexible booking policies on momondo?

Flights from Sydney to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Sydney to Illinois?

Once you have performed a search for Sydney to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Sydney to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Sydney to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.