How long does it take to fly to Sydney?

Flight times from Illinois to Sydney vary, but if you’re flying out of Chicago and flying into Sydney (one of the most popular routes), then the duration is 23h 50m on average. Another popular route from Illinois to Sydney is flying from Peoria to Sydney, which will take roughly 25h 10m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Sydney?

Qantas Airways, American Airlines and United Airlines are the top three most popular airlines that fly to Sydney from Illinois according to our data. Qantas Airways is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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 are updated daily.

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

There are 8 operators available for flights from Illinois to Sydney Kingsford Smith Airport as of March 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 license 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.

$460 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 round-trip flights

Enter your travel dates to find the best prices.

6:55 am - 11:50 am

ORD

SYD

37h 55m

3 stops

6:00 am - 11:13 pm

SYD

ORD

56h 13m

3 stops

$1,007Multiple Airlines

Sat, May 9 - Sat, May 16

6:10 am - 10:10 pm

MDW

SYD

49h 00m

3 stops

1:15 pm - 11:09 am

SYD

MDW

36h 54m

3 stops

$1,039Multiple Airlines

Tue, Apr 28 - Tue, May 5

2:00 pm - 11:50 am

ORD

SYD

30h 50m

2 stops

1:15 pm - 5:35 am

SYD

ORD

31h 20m

2 stops

$1,071Multiple Airlines

Thu, Apr 23 - Sun, May 3

3:40 pm - 7:20 am

ORD

SYD

24h 40m

1 stop

9:20 am - 2:45 pm

SYD

ORD

20h 25m

1 stop

$1,118Air Canada

Thu, May 21 - Wed, Jun 3

2:15 pm - 7:20 am

ORD

SYD

26h 05m

2 stops

9:20 am - 8:01 pm

SYD

ORD

25h 41m

2 stops

$1,125Air Canada

Thu, May 21 - Wed, Jun 3

6:11 pm - 11:50 am

STL

SYD

26h 39m

2 stops

1:15 pm - 10:59 pm

SYD

STL

24h 44m

2 stops

$1,208Fiji Airways

Tue, May 12 - Tue, May 19

2:39 pm - 7:00 am

PIA

SYD

25h 21m

2 stops

9:30 am - 8:47 pm

SYD

PIA

26h 17m

2 stops

$1,561United Airlines

Sat, Jul 11 - Fri, Aug 14

4:43 pm - 6:55 am

PIA

SYD

23h 12m

1 stop

12:00 pm - 11:20 pm

SYD

PIA

26h 20m

1 stop

$1,604American Airlines

Wed, Aug 26 - Mon, Sep 7

12:20 pm - 7:30 am

PIA

SYD

28h 10m

2 stops

9:10 am - 11:21 pm

SYD

PIA

29h 11m

2 stops

$1,608American Airlines

Wed, Aug 26 - Mon, Sep 7

1:35 pm - 6:55 am

PIA

SYD

26h 20m

2 stops

9:30 am - 9:19 pm

SYD

PIA

26h 49m

2 stops

$1,713United Airlines

Thu, May 7 - Sun, May 10

American Airlines flights from Illinois to Sydney

Our best American Airlines deals on Illinois to Sydney flight tickets

American Airlines

Aug 26

PIA4:43 pmGreater Peoria

23h 12m

1 stop

SYD6:55 amSydney Kingsford Smith

Sep 7

SYD12:00 pmSydney Kingsford Smith

26h 20m

1 stop

PIA11:20 pmGreater Peoria

$1,604

American Airlines

Aug 26

PIA12:20 pmGreater Peoria

28h 10m

2 stops

SYD7:30 amSydney Kingsford Smith

Sep 7

SYD9:10 amSydney Kingsford Smith

29h 11m

2 stops

PIA11:21 pmGreater Peoria

$1,608

American Airlines

Apr 2

STL9:35 amLambert-St Louis

29h 20m

1 stop

SYD6:55 amSydney Kingsford Smith

Apr 6

SYD12:00 pmSydney Kingsford Smith

22h 29m

1 stop

STL7:29 pmLambert-St Louis

$2,255

Qantas Airways flights from Illinois to Sydney

Our best Qantas Airways deals on Illinois to Sydney flight tickets

Qantas Airways

Jul 1

STL6:35 amLambert-St Louis

42h 00m

2 stops

SYD3:35 pmSydney Kingsford Smith

Jul 8

SYD12:00 pmSydney Kingsford Smith

19h 33m

1 stop

STL4:33 pmLambert-St Louis

$1,386

Qantas Airways

Apr 19

STL6:21 amLambert-St Louis

40h 29m

2 stops

SYD1:50 pmSydney Kingsford Smith

Apr 29

SYD12:00 pmSydney Kingsford Smith

20h 21m

1 stop

STL5:21 pmLambert-St Louis

$1,387

Qantas Airways

Jul 6

STL6:36 amLambert-St Louis

42h 24m

2 stops

SYD4:00 pmSydney Kingsford Smith

Jul 19

SYD12:00 pmSydney Kingsford Smith

19h 33m

1 stop

STL4:33 pmLambert-St Louis

$1,442

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 5/9

6:55 am-11:50 am

3 stops37h 55m

Sydney Kingsford Smith

Sat 5/16

6:00 am-11:13 pm

3 stops56h 13m

$1,007

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Tue 4/28

6:10 am-10:10 pm

3 stops49h 00m

Sydney Kingsford Smith

Tue 5/5

1:15 pm-11:09 am

3 stops36h 54m

$1,039

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 4/23

2:00 pm-11:50 am

2 stops30h 50m

Sydney Kingsford Smith

Sun 5/3

1:15 pm-5:35 am

2 stops31h 20m

$1,071

Quickest round-trip

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/21

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

Wed 6/3

9:20 am-2:45 pm

1 stop20h 25m

$1,118

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/21

2:15 pm-7:20 am

2 stops26h 05m

Sydney Kingsford Smith

Wed 6/3

9:20 am-8:01 pm

2 stops25h 41m

$1,125

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 5/12

6:11 pm-11:50 am

2 stops26h 39m

Sydney Kingsford Smith

Tue 5/19

1:15 pm-10:59 pm

2 stops24h 44m

$1,208

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Sat 7/11

2:39 pm-7:00 am

2 stops25h 21m

Sydney Kingsford Smith

Fri 8/14

9:30 am-8:47 pm

2 stops26h 17m

$1,561

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Wed 8/26

4:43 pm-6:55 am

1 stop23h 12m

Sydney Kingsford Smith

Mon 9/7

12:00 pm-11:20 pm

1 stop26h 20m

$1,604

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Wed 8/26

12:20 pm-7:30 am

2 stops28h 10m

Sydney Kingsford Smith

Mon 9/7

9:10 am-11:21 pm

2 stops29h 11m

$1,608

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Thu 5/7

1:35 pm-6:55 am

2 stops26h 20m

Sydney Kingsford Smith

Sun 5/10

9:30 am-9:19 pm

2 stops26h 49m

$1,713

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 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?

In general, February is the cheapest month to fly from Illinois to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,149. If you are unable to visit Sydney during the month of February, then departing from Illinois during the month September is also very affordable. Most momondo users find prices during this month for around $1,355.

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 $1,341 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Illinois for as low as $1,058 on momondo.

Can stopping save me money on Illinois to Sydney flights?

You could potentially save up to 19% 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	21h 06m
Direct flights	None

The fastest flight from Illinois to Sydney takes 21h 06m

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 are updated daily.
How many operators does momondo search for flights from Illinois to Sydney Kingsford Smith Airport?
There are 8 operators available for flights from Illinois to Sydney Kingsford Smith Airport as of March 2026.
How old do you have to be to fly from Illinois to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 license 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
American Airlines	PriceFrom $198	Free Cancellation	Rating 7.1 11,533 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $716	Free Cancellation	Rating 8.1 237 reviews	Search Fiji Airways flights
Qantas Airways	PriceFrom $836	Free Cancellation	Rating 7.5 1,015 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $870	Free Cancellation	Rating 7.4 9,520 reviews	Search United Airlines flights
Air Canada	PriceFrom $891	Free Cancellation	Rating 7.1 10,866 reviews	Search Air Canada flights
Delta	PriceFrom $1,034	Free Cancellation	Rating 7.9 8,360 reviews	Search Delta flights
ANA	PriceFrom $1,177	Free Cancellation	Rating 8.4 1,160 reviews	Search ANA flights
Air New Zealand	PriceFrom $1,282	Free Cancellation	Rating 8.0 623 reviews	Search Air New Zealand flights

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Wollongong

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Manly

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Coogee

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Cronulla

Charlestown

Terrigal

Swansea

Why use momondo?

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

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 Illinois to Sydney for you.

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

All flight searches from Illinois to Sydney on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Sydney.

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.

An easier way to manage your Sydney trip

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Cheap flights from Illinois to Sydney from $460

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Sydney departing on 5/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from Illinois to Sydney

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How to get the cheapest flight ticket from Illinois to Sydney

What is the cheapest month to fly to Sydney?

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

Can stopping save me money on Illinois to Sydney flights?

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

What airlines fly to Sydney?

How long does it take to fly to Sydney?

Cheap Illinois to Sydney flight deals and tips

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

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

Traveling to a place near Sydney?

Why use momondo?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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List of cabin classes available on flights landing in Sydney. Availability may vary depending on flight origin and airline.

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