How long does it take to fly to Sydney?

If you’re flying from a popular airport in Illinois, such as Chicago or Peoria, and flying into Sydney, then you can expect flight times to average 22h 45m and 29h 19m, respectively.

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

United Airlines, Qantas Airways, and Turkish Airlines are the most popular carriers operating from Illinois to Sydney Kingsford Smith

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

Prices for flights from Illinois to Sydney Kingsford Smith Airport refresh daily.

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

The number of operators available for flights from Illinois to Sydney Kingsford Smith Airport is 1 as of August 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$797 Cheap Flights from Illinois to Sydney in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Sydney

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

14:05 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 17m2 stops Auckland Intl Los Angeles Los Angeles

$1,720Air New Zealand

Wed, 10 Feb - Wed, 17 Feb

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 19:14SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 24m2 stops Auckland Intl Houston George Bush Intcntl

$1,720Air New Zealand

Tue, 26 Jan - Tue, 9 Feb

16:05 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 30m2 stops Houston George Bush Intcntl Auckland Intl

11:50 - 19:14SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 24m2 stops Auckland Intl Houston George Bush Intcntl

$1,720Air New Zealand

Tue, 26 Jan - Tue, 9 Feb

14:10 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 25m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 18:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 59m2 stops Auckland Intl Los Angeles Los Angeles

$1,720Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

14:40 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 55m2 stops Los Angeles Los Angeles Auckland Intl

14:05 - 20:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 32m2 stops Auckland Intl Los Angeles Los Angeles

$1,721Air New Zealand

Mon, 9 Nov - Mon, 16 Nov

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Auckland Intl Los Angeles Los Angeles

$1,722Air New Zealand

Mon, 25 Jan - Wed, 3 Feb

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

14:05 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 17m2 stops Auckland Intl Los Angeles Los Angeles

$1,722Air New Zealand

Wed, 10 Feb - Wed, 3 Mar

16:05 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 30m2 stops Houston George Bush Intcntl Auckland Intl

11:50 - 18:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 04m2 stops Auckland Intl Los Angeles Los Angeles

$1,722Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

15:34 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 21m1 stop Dallas/Fort Worth

17:50 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

20h 40m1 stop Los Angeles Los Angeles

$1,836Qantas Airways

Tue, 15 Sep - Tue, 22 Sep

16:57 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 08m2 stops Dallas/Fort Worth Brisbane

14:05 - 18:11SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 06m1 stop Dallas/Fort Worth

$1,842Qantas Airways

Wed, 10 Feb - Tue, 16 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 45m2 stops Los Angeles Los Angeles Auckland Intl

19:20 - 21:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 25m2 stops Auckland Intl San Francisco

$1,881Air New Zealand

Mon, 24 Aug - Mon, 7 Sep

07:05 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

17:50 - 06:17SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 27m1 stop Los Angeles Los Angeles

$1,932Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

06:05 - 07:30MDW Chicago Midway-SYD Sydney Kingsford Smith

34h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

17:50 - 10:55SYD Sydney Kingsford Smith-MDW Chicago Midway

32h 05m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,933Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

06:05 - 19:10MDW Chicago Midway-SYD Sydney Kingsford Smith

46h 05m3 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles Tokyo Haneda

11:45 - 10:55SYD Sydney Kingsford Smith-MDW Chicago Midway

38h 10m3 stops Tokyo Haneda Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,936Multiple Airlines

Tue, 25 Aug - Tue, 1 Sep

07:05 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

17:50 - 23:08SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

44h 18m2 stops Los Angeles Los Angeles Orlando

$2,083Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

21:20 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 10m1 stop Los Angeles Los Angeles

17:50 - 06:17SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 27m1 stop Los Angeles Los Angeles

$2,138Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

08:50 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

32h 55m2 stops Los Angeles Los Angeles Auckland Intl

09:30 - 17:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 35m1 stop Los Angeles Los Angeles

$2,172Air New Zealand

Sun, 23 Aug - Sun, 6 Sep

17:45 - 09:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Tokyo Haneda

20:55 - 08:40SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 45m1 stop Tokyo Haneda

$2,186ANA

Sat, 22 Aug - Fri, 4 Sep

19:00 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 05m1 stop Los Angeles Los Angeles

20:15 - 05:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 45m2 stops Honolulu Los Angeles Los Angeles

$2,671Qantas Airways

Fri, 21 Aug - Sun, 23 Aug

15:22 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 08m1 stop Los Angeles Los Angeles

17:50 - 15:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

37h 04m1 stop Los Angeles Los Angeles

$2,675Qantas Airways

Tue, 25 Aug - Tue, 1 Sep

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Air New Zealand flights from Illinois to Sydney

Our best Air New Zealand deals on Illinois to Sydney flight tickets

Air New Zealand

1 Feb

ORD14:10Chicago O'Hare Intl

27h 25m

2 stops

SYD10:35Sydney Kingsford Smith

3 Mar

SYD09:55Sydney Kingsford Smith

25h 59m

2 stops

ORD18:54Chicago O'Hare Intl

$1,720

Air New Zealand

9 Nov

ORD14:40Chicago O'Hare Intl

26h 55m

2 stops

SYD10:35Sydney Kingsford Smith

16 Nov

SYD14:05Sydney Kingsford Smith

23h 32m

2 stops

ORD20:37Chicago O'Hare Intl

$1,721

Air New Zealand

1 Feb

ORD16:05Chicago O'Hare Intl

25h 30m

2 stops

SYD10:35Sydney Kingsford Smith

3 Mar

SYD11:50Sydney Kingsford Smith

24h 04m

2 stops

ORD18:54Chicago O'Hare Intl

$1,722

Air Canada flights from Illinois to Sydney

Our best Air Canada deals on Illinois to Sydney flight tickets

Air Canada

30 Aug

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

15 Sept

SYD09:20Sydney Kingsford Smith

20h 23m

1 stop

ORD14:43Chicago O'Hare Intl

$1,753

Air Canada

23 Sept

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

30 Sept

SYD09:20Sydney Kingsford Smith

20h 23m

1 stop

ORD14:43Chicago O'Hare Intl

$1,758

Air Canada

23 Sept

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

30 Sept

SYD09:20Sydney Kingsford Smith

24h 23m

2 stops

ORD18:43Chicago O'Hare Intl

$1,760

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 10/2

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Wed 17/2

14:05-20:22

2 stops23h 17m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 26/1

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Tue 9/2

11:50-19:14

2 stops24h 24m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 26/1

16:05-10:35

2 stops25h 30m

Sydney Kingsford Smith

Tue 9/2

11:50-19:14

2 stops24h 24m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

14:10-10:35

2 stops27h 25m

Sydney Kingsford Smith

Wed 3/3

09:55-18:54

2 stops25h 59m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 9/11

14:40-10:35

2 stops26h 55m

Sydney Kingsford Smith

Mon 16/11

14:05-20:37

2 stops23h 32m

$1,721

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 25/1

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Wed 3/2

11:50-20:22

2 stops25h 32m

$1,722

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 10/2

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Wed 3/3

14:05-20:22

2 stops23h 17m

$1,722

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

16:05-10:35

2 stops25h 30m

Sydney Kingsford Smith

Wed 3/3

11:50-18:54

2 stops24h 04m

$1,722

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 15/9

15:34-06:55

1 stop24h 21m

Sydney Kingsford Smith

Tue 22/9

17:50-23:30

1 stop20h 40m

$1,836

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 10/2

16:57-11:05

2 stops25h 08m

Sydney Kingsford Smith

Tue 16/2

14:05-18:11

1 stop21h 06m

$1,842

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to Sydney

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

Other information

What is the cheapest month to fly to Sydney?

The month of June is, on average, the cheapest month to fly to Sydney from Illinois, with most prices found around $1,804. If you aren’t able to travel to Sydney during the month of June, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,852.

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

You are more likely to see cheaper flights to Sydney from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,011 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Illinois for as low as $1,544 on momondo.

Cheap Illinois to Sydney flight deals and tips

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

Best price found	$797
Fastest flight time	22h 20m
Direct flights	None

The best one-way flight to Sydney from Illinois in the past 72 hours is $797. The best return flight deal from Illinois to Sydney found on momondo in the last 72 hours is $1,720.

The fastest flight from Illinois to Sydney takes 22h 20m

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

Search flight deals

Frequently asked questions about flying from Illinois to Sydney

When did momondo last update prices for flights from Illinois to Sydney Kingsford Smith Airport?
Prices for flights from Illinois to Sydney Kingsford Smith Airport refresh daily.
How many operators does momondo search for flights from Illinois to Sydney Kingsford Smith Airport?
The number of operators available for flights from Illinois to Sydney Kingsford Smith Airport is 1 as of August 2026.
How old do you have to be to fly from Illinois to Sydney Kingsford Smith Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Illinois to Sydney

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

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $2,065	Free cancellation	Rating 7.5 1,083 reviews		Search Qantas Airways flights

Parramatta

Wollongong

Terrigal

Katoomba

Penrith

Lithgow

Coogee

Manly

Leura

Randwick

Cronulla

Bondi Beach

Charlestown

Swansea

Newport

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Sydney. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Illinois to Sydney flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Sydney from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Illinois and alert you when they change.