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

Air New Zealand, American Airlines, and Air Canada are the most popular carriers 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 March 2026, there are 2 operators 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.

$516 Cheap Flights from Sydney to Illinois in 2026

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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.

1:15 pm - 11:27 pm

SYD

ORD

25h 12m

2 stops

2:00 pm - 10:10 pm

ORD

SYD

41h 10m

2 stops

$1,013Multiple Airlines

Tue, Apr 21 - Fri, Apr 24

1:15 pm - 5:50 am

SYD

ORD

31h 35m

2 stops

12:44 pm - 12:05 pm

ORD

SYD

32h 21m

2 stops

$1,015Multiple Airlines

Mon, May 11 - Mon, Jun 1

11:55 am - 11:15 pm

SYD

ORD

26h 20m

2 stops

4:30 pm - 8:45 am

ORD

SYD

25h 15m

2 stops

$1,018Air New Zealand

Fri, Jun 5 - Fri, Jun 19

11:55 am - 11:15 pm

SYD

ORD

26h 20m

2 stops

3:47 pm - 5:50 pm

ORD

SYD

35h 03m

2 stops

$1,027Air New Zealand

Fri, Jun 5 - Fri, Jun 19

11:55 am - 11:15 pm

SYD

ORD

26h 20m

2 stops

3:47 pm - 5:50 pm

ORD

SYD

35h 03m

2 stops

$1,028Air New Zealand

Fri, Jun 5 - Fri, Jun 19

9:55 am - 1:15 am

SYD

ORD

30h 20m

2 stops

4:30 pm - 5:50 pm

ORD

SYD

34h 20m

2 stops

$1,035Air New Zealand

Fri, Jun 5 - Fri, Jun 19

9:10 am - 4:33 pm

SYD

STL

22h 23m

2 stops

9:08 am - 7:05 am

STL

SYD

30h 57m

2 stops

$1,110American Airlines

Wed, May 27 - Sun, May 31

10:20 am - 6:17 pm

SYD

STL

22h 57m

1 stop

7:23 pm - 6:55 am

STL

SYD

20h 32m

1 stop

$1,128United Airlines

Wed, May 27 - Sun, May 31

9:20 am - 8:54 pm

SYD

STL

26h 34m

2 stops

4:30 pm - 7:20 am

STL

SYD

23h 50m

2 stops

$1,170Air Canada

Tue, Apr 21 - Tue, Apr 28

9:20 am - 12:06 pm

SYD

STL

41h 46m

2 stops

7:05 am - 7:20 am

STL

SYD

57h 15m

2 stops

$1,248Air Canada

Sun, May 3 - Sun, May 17

Qantas Airways flights from Sydney to Illinois

Our best Qantas Airways deals on Sydney to Illinois flight tickets

Qantas Airways

Jun 22

SYD5:50 pmSydney Kingsford Smith

21h 09m

1 stop

ORD11:59 pmChicago O'Hare Intl

Jul 19

ORD7:00 pmChicago O'Hare Intl

21h 05m

1 stop

SYD7:05 amSydney Kingsford Smith

$1,237

Qantas Airways

Apr 23

SYD9:10 amSydney Kingsford Smith

20h 06m

1 stop

ORD2:16 pmChicago O'Hare Intl

Apr 30

ORD7:21 pmChicago O'Hare Intl

20h 44m

1 stop

SYD7:05 amSydney Kingsford Smith

$1,307

Qantas Airways

Jun 22

SYD9:10 amSydney Kingsford Smith

22h 34m

1 stop

ORD4:44 pmChicago O'Hare Intl

Jul 19

ORD5:10 pmChicago O'Hare Intl

25h 10m

2 stops

SYD9:20 amSydney Kingsford Smith

$1,313

American Airlines flights from Sydney to Illinois

Our best American Airlines deals on Sydney to Illinois flight tickets

American Airlines

May 27

SYD9:10 amSydney Kingsford Smith

22h 23m

2 stops

STL4:33 pmLambert-St Louis

May 31

STL9:08 amLambert-St Louis

30h 57m

2 stops

SYD7:05 amSydney Kingsford Smith

$1,110

American Airlines

Jul 13

SYD9:10 amSydney Kingsford Smith

22h 31m

1 stop

ORD4:41 pmChicago O'Hare Intl

Aug 10

ORD3:12 pmChicago O'Hare Intl

24h 53m

1 stop

SYD7:05 amSydney Kingsford Smith

$1,176

American Airlines

Jul 10

SYD9:10 amSydney Kingsford Smith

20h 08m

1 stop

ORD2:18 pmChicago O'Hare Intl

Jul 26

ORD4:49 pmChicago O'Hare Intl

23h 16m

2 stops

SYD7:05 amSydney Kingsford Smith

$1,224

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 4/21

1:15 pm-11:27 pm

2 stops25h 12m

Chicago O'Hare Intl

Fri 4/24

2:00 pm-10:10 pm

2 stops41h 10m

$1,013

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 5/11

1:15 pm-5:50 am

2 stops31h 35m

Chicago O'Hare Intl

Mon 6/1

12:44 pm-12:05 pm

2 stops32h 21m

$1,015

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 6/5

11:55 am-11:15 pm

2 stops26h 20m

Chicago O'Hare Intl

Fri 6/19

4:30 pm-8:45 am

2 stops25h 15m

$1,018

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 6/5

11:55 am-11:15 pm

2 stops26h 20m

Chicago O'Hare Intl

Fri 6/19

3:47 pm-5:50 pm

2 stops35h 03m

$1,027

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 6/5

11:55 am-11:15 pm

2 stops26h 20m

Chicago O'Hare Intl

Fri 6/19

3:47 pm-5:50 pm

2 stops35h 03m

$1,028

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 6/5

9:55 am-1:15 am

2 stops30h 20m

Chicago O'Hare Intl

Fri 6/19

4:30 pm-5:50 pm

2 stops34h 20m

$1,035

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/27

9:10 am-4:33 pm

2 stops22h 23m

Lambert-St Louis

Sun 5/31

9:08 am-7:05 am

2 stops30h 57m

$1,110

Quickest round-trip

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/27

10:20 am-6:17 pm

1 stop22h 57m

Lambert-St Louis

Sun 5/31

7:23 pm-6:55 am

1 stop20h 32m

$1,128

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 4/21

9:20 am-8:54 pm

2 stops26h 34m

Lambert-St Louis

Tue 4/28

4:30 pm-7:20 am

2 stops23h 50m

$1,170

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 5/3

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Sun 5/17

7:05 am-7:20 am

2 stops57h 15m

$1,248

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 August. Flight prices, which tend to average around $1,046, 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 August, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,098.

How far in advance should I book a flight 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 $1,279 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 $838 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 9% 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

Fastest flight time	20h 21m
Direct flights	None

The fastest flight from Sydney to Illinois takes 20h 21m

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

Search flight deals

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 March 2026, there are 2 operators 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 $692	Free Cancellation	Rating 7.5 1,003 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $795	Free Cancellation	Rating 7.4 9,413 reviews		Search United Airlines 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.