How long does it take to fly to Sydney?

If you’re flying from a popular airport in Illinois, such as Peoria or Chicago, and flying into Sydney, then you can expect flight times to average 25h 10m and 25h 37m, respectively.

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

Air Canada, Asiana Airlines, and Delta 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 March 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.

$671 Cheap Flights from Illinois to Sydney in 2026

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Find the cheapest flights from Illinois to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:55 - 11:50

ORD

SYD

37h 55m

3 stops

06:00 - 23:13

SYD

ORD

56h 13m

3 stops

$1,469Multiple Airlines

Sat, 9 May - Sat, 16 May

06:10 - 22:10

MDW

SYD

49h 00m

3 stops

13:15 - 11:09

SYD

MDW

36h 54m

3 stops

$1,515Multiple Airlines

Tue, 28 Apr - Tue, 5 May

14:00 - 11:50

ORD

SYD

30h 50m

2 stops

13:15 - 05:35

SYD

ORD

31h 20m

2 stops

$1,562Multiple Airlines

Thu, 23 Apr - Sun, 3 May

15:40 - 07:20

ORD

SYD

24h 40m

1 stop

09:20 - 14:45

SYD

ORD

20h 25m

1 stop

$1,631Air Canada

Thu, 21 May - Wed, 3 Jun

14:15 - 07:20

ORD

SYD

26h 05m

2 stops

09:20 - 20:01

SYD

ORD

25h 41m

2 stops

$1,641Air Canada

Thu, 21 May - Wed, 3 Jun

18:11 - 11:50

STL

SYD

26h 39m

2 stops

13:15 - 22:59

SYD

STL

24h 44m

2 stops

$1,762Fiji Airways

Tue, 12 May - Tue, 19 May

14:39 - 07:00

PIA

SYD

25h 21m

2 stops

09:30 - 20:47

SYD

PIA

26h 17m

2 stops

$2,277United Airlines

Sat, 11 Jul - Fri, 14 Aug

16:43 - 06:55

PIA

SYD

23h 12m

1 stop

12:00 - 23:20

SYD

PIA

26h 20m

1 stop

$2,339American Airlines

Wed, 26 Aug - Mon, 7 Sep

12:20 - 07:30

PIA

SYD

28h 10m

2 stops

09:10 - 23:21

SYD

PIA

29h 11m

2 stops

$2,345American Airlines

Wed, 26 Aug - Mon, 7 Sep

13:35 - 06:55

PIA

SYD

26h 20m

2 stops

09:30 - 21:19

SYD

PIA

26h 49m

2 stops

$2,498United Airlines

Thu, 7 May - Sun, 10 May

American Airlines flights from Illinois to Sydney

Our best American Airlines deals on Illinois to Sydney flight tickets

American Airlines

26 Aug

PIA16:43Greater Peoria

23h 12m

1 stop

SYD06:55Sydney Kingsford Smith

7 Sept

SYD12:00Sydney Kingsford Smith

26h 20m

1 stop

PIA23:20Greater Peoria

$2,339

American Airlines

26 Aug

PIA12:20Greater Peoria

28h 10m

2 stops

SYD07:30Sydney Kingsford Smith

7 Sept

SYD09:10Sydney Kingsford Smith

29h 11m

2 stops

PIA23:21Greater Peoria

$2,345

American Airlines

2 Apr

STL09:35Lambert-St Louis

29h 20m

1 stop

SYD06:55Sydney Kingsford Smith

6 Apr

SYD12:00Sydney Kingsford Smith

22h 29m

1 stop

STL19:29Lambert-St Louis

$3,289

Qantas Airways flights from Illinois to Sydney

Our best Qantas Airways deals on Illinois to Sydney flight tickets

Qantas Airways

1 July

STL06:35Lambert-St Louis

42h 00m

2 stops

SYD15:35Sydney Kingsford Smith

8 July

SYD12:00Sydney Kingsford Smith

19h 33m

1 stop

STL16:33Lambert-St Louis

$2,022

Qantas Airways

19 Apr

STL06:21Lambert-St Louis

40h 29m

2 stops

SYD13:50Sydney Kingsford Smith

29 Apr

SYD12:00Sydney Kingsford Smith

20h 21m

1 stop

STL17:21Lambert-St Louis

$2,023

Qantas Airways

6 July

STL06:36Lambert-St Louis

42h 24m

2 stops

SYD16:00Sydney Kingsford Smith

19 July

SYD12:00Sydney Kingsford Smith

19h 33m

1 stop

STL16:33Lambert-St Louis

$2,103

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 9/5

06:55-11:50

3 stops37h 55m

Sydney Kingsford Smith

Sat 16/5

06:00-23:13

3 stops56h 13m

$1,469

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Tue 28/4

06:10-22:10

3 stops49h 00m

Sydney Kingsford Smith

Tue 5/5

13:15-11:09

3 stops36h 54m

$1,515

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 23/4

14:00-11:50

2 stops30h 50m

Sydney Kingsford Smith

Sun 3/5

13:15-05:35

2 stops31h 20m

$1,562

Fastest return journey

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 21/5

15:40-07:20

1 stop24h 40m

Sydney Kingsford Smith

Wed 3/6

09:20-14:45

1 stop20h 25m

$1,631

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 21/5

14:15-07:20

2 stops26h 05m

Sydney Kingsford Smith

Wed 3/6

09:20-20:01

2 stops25h 41m

$1,641

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 12/5

18:11-11:50

2 stops26h 39m

Sydney Kingsford Smith

Tue 19/5

13:15-22:59

2 stops24h 44m

$1,762

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Sat 11/7

14:39-07:00

2 stops25h 21m

Sydney Kingsford Smith

Fri 14/8

09:30-20:47

2 stops26h 17m

$2,277

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Wed 26/8

16:43-06:55

1 stop23h 12m

Sydney Kingsford Smith

Mon 7/9

12:00-23:20

1 stop26h 20m

$2,339

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Wed 26/8

12:20-07:30

2 stops28h 10m

Sydney Kingsford Smith

Mon 7/9

09:10-23:21

2 stops29h 11m

$2,345

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Thu 7/5

13:35-06:55

2 stops26h 20m

Sydney Kingsford Smith

Sun 10/5

09:30-21:19

2 stops26h 49m

$2,498

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 February is, on average, the cheapest month to fly to Sydney from Illinois, with most prices found around $1,676. If you aren’t able to travel to Sydney during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $1,976.

How far in advance should I book a flight 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 $1,956 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 $1,543 on momondo.

Can stopping save me money on Illinois to Sydney flights?

You could potentially save up to 20% on your flight if you consider stops on a Illinois to Sydney flight.

Cheap Illinois to Sydney flight deals and tips

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

Fastest flight time	24h 40m
Direct flights	None

The fastest flight from Illinois to Sydney takes 24h 40m

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

Search flight deals

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 March 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 $1,973	Free cancellation	Rating 7.5 1,016 reviews		Search Qantas Airways flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Manly

Coogee

Leura

Bondi Beach

Cronulla

Randwick

Charlestown

Newport

Swansea

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.