How long is the flight from Sydney to Illinois?

Departing from Sydney to Illinois will take you 19h 57m. The distance between Sydney and Illinois is about 14851 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to fly from Sydney to Illinois one-way?

The cheapest airline one-way is Air New Zealand, with whom users have recently found tickets for as low as $760. However, be on the lookout for offers from Qantas Airways and Air Canada, as they are both options that can get you from Sydney to Illinois for a low price.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from Sydney to Illinois?

The most popular route from Sydney to Illinois is Sydney Kingsford Smith - Chicago O'Hare Intl. You may also consider Sydney Kingsford Smith - Lambert-St Louis or Sydney Kingsford Smith - Chicago Midway.

What are the most popular airlines that fly from Sydney to Illinois?

Qantas Airways, American Airlines and United Airlines are the most popular airlines when flying from Sydney to Illinois.

What is the cheapest time of day to fly from SYD to IL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sydney to Illinois as you normally would.

What airport do you fly from for flights from Sydney to Illinois?

If you book a flight to Illinois from Sydney, you will be flying from Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney.

Can I find deals for flights from Sydney to Illinois that include hotel bookings?

Yes. In addition to deals on Sydney to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Sydney to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Illinois.

Can I find deals for business class flights from Sydney to Illinois?

Yes. Cheapflights offers flight deals from Sydney to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$706+ Cheap Flights from Sydney to Illinois

Cheap flight deals from Sydney to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Sydney to Illinois
Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 October 2026.

Mon 12/1010:10 -

1 stop30h 20m

Tue 27/1017:53 -

1 stop23h 07m

Deal found 9/10$1,057

Thu 5/1111:10 -

1 stop23h 49m

Mon 9/1117:15 -

1 stop22h 45m

Deal found 10/10$1,061

Mon 23/1110:40 -

1 stop19h 57m

Mon 30/1114:32 -

1 stop24h 58m

Deal found 9/10$1,064

Thu 15/1010:10 -

1 stop21h 49m

Wed 28/1018:55 -

1 stop22h 05m

Deal found 12/10$1,070

Thu 29/1009:40 -

2 stops23h 18m

Fri 13/1111:35 -

2 stops27h 55m

Deal found 9/10$1,133

Tue 8/1207:20 -

2 stops31h 55m

Tue 12/117:59 -

2 stops24h 46m

Deal found 12/10$1,174

Thu 19/1111:30 -

1 stop46h 25m

Mon 23/1122:45 -

1 stop42h 05m

Deal found 12/10$1,444

Sat 17/1011:20 -

2 stops25h 31m

Sat 24/1015:41 -

2 stops47h 19m

Deal found 14/10$1,580

Thu 12/1111:30 -

1 stop46h 25m

Mon 30/1122:45 -

1 stop42h 05m

Deal found 11/10$1,600

Mon 2/1122:20 -

1 stop31h 10m

Tue 17/1114:10 -

1 stop26h 25m

Deal found 13/10$1,757

Sat 17/1013:00 -

1 stop39h 01m

Sat 24/1017:30 -

2 stops44h 55m

Deal found 14/10$1,795

Sat 17/1013:00 -

1 stop39h 01m

Sat 24/1012:35 -

1 stop26h 20m

Deal found 14/10$2,049

Best flights from Sydney to Illinois
Discover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 October 2026.

Mon 23/1110:40 -

1 stop19h 57m

Mon 30/1114:03 -

2 stops25h 27m

Deal found 9/10$1,064

Sat 17/1011:20 -

2 stops25h 31m

Sat 24/1015:41 -

2 stops47h 19m

Deal found 14/10$1,580

Mon 26/1008:45 -

1 stop44h 45m

Fri 30/1015:10 -

1 stop37h 40m

Deal found 10/10$2,045

Sat 17/1013:00 -

1 stop39h 01m

Sat 24/1012:35 -

1 stop26h 20m

Deal found 14/10$2,049

Sun 1/1122:20 -

1 stop31h 10m

Mon 16/1114:10 -

2 stops38h 25m

Deal found 12/10$2,053

Sat 31/1021:35 -

2 stops38h 45m

Sat 28/1120:15 -

2 stops54h 10m

Deal found 11/10$2,109

Thu 29/1009:40 -

1 stop19h 58m

Fri 13/1109:51 -

2 stops29h 39m

Deal found 9/10$1,133

Fri 30/1021:30 -

1 stop51h 05m

Sat 14/1106:30 -

2 stops30h 55m

Deal found 10/10$2,068

Sun 1/1121:35 -

2 stops54h 25m

Mon 16/1120:15 -

2 stops54h 10m

Deal found 12/10$2,109

Fri 16/1006:00 -

2 stops47h 55m

Fri 23/1016:15 -

2 stops47h 50m

Deal found 11/10$2,316

Thu 5/1115:15 -

1 stop38h 15m

Mon 9/1114:10 -

2 stops36h 35m

Deal found 10/10$2,111

Sat 31/1021:40 -

3 stops34h 20m

Sun 15/1118:35 -

2 stops32h 10m

Deal found 11/10$2,436

Sat 31/1021:40 -

3 stops34h 20m

Tue 15/1214:13 -

2 stops36h 32m

Deal found 9/10$2,482

Sat 17/1015:35 -

3 stops48h 35m

Sat 24/1016:42 -

2 stops37h 43m

Deal found 14/10$8,713

Find flight deals from Sydney to Illinois

Round-trip from	$1,061
One-way from	$706
Popular in	May
Cheapest in	October
Average price	$1,554

American Airlines
5/11-9/11
2 total stops
46h 34m total
Sydney to Illinois

Search Deals

Delta
7/11-31/12
2 total stops
26h 50m total
Sydney to Illinois

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($228 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($72 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 7/11

10:40-15:45

1 stop22h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$706

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 15/11

11:30-16:55

1 stop46h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$918

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 23/11

10:40-13:37

1 stop19h 57m

Chicago O'Hare Intl

Mon 30/11

14:03-08:30

2 stops25h 27m

$1,064

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 29/10

09:40-13:38

1 stop19h 58m

Chicago O'Hare Intl

Fri 13/11

09:51-08:30

2 stops29h 39m

$1,133

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 20/10

19:45-13:55

2 stops34h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,199

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 17/10

21:35-14:43

2 stops33h 08m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,203

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 16/11

17:55-12:30

2 stops35h 35m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,205

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 7/11

18:30-12:30

2 stops35h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,226

SydneyPeoria

SYD Sydney Kingsford Smith - PIA Greater Peoria

SYDPIA

Sydney Kingsford Smith

Sat 17/10

11:20-20:51

2 stops25h 31m

Greater Peoria

Sat 24/10

15:41-07:00

2 stops47h 19m

$1,580

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 1/11

15:15-10:23

3 stops35h 08m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,586

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 22 resultsSorted by cheapest first

Best time to book a flight from Sydney to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Sydney with our price prediction graph.

SYD-ORD

SYD-PIA

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sydney to Illinois

SYD-USIL

SYD-ORD

SYD-PIA

What is the cheapest month to book a flight from Sydney to Illinois?

Currently, October is the cheapest month in which you can book a flight from Sydney to Illinois (average of $1,554). Flying from Sydney to Illinois in December is currently the most expensive (average of $2,183). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Sydney to Illinois?

Airfare is below average for this route at the moment.

Sydney to Illinois flights typically cost between $1,354 and $1,939 in November.
The cheapest return price found within the last 5 days was $1,061 on American Airlines (5 Nov–9 Nov).

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

To ensure you get the cheapest price possible for a flight from Sydney to Illinois, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Illinois

Read through reviews of airlines operating flights from Sydney to Illinois, such as Air New Zealand,Qantas Airways, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Air New Zealand

8.0

Very Good

674 reviews

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Qantas Airways

7.5

Good

1,109 reviews

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

United Airlines

7.4

Good

10,361 reviews

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Air Canada

7.1

Good

11,769 reviews

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

American Airlines

7.0

Good

12,164 reviews

Air New Zealand

8.0

Very Good

674 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Related info for your journey

What airport do you fly from for flights from Sydney to Illinois?
If you book a flight to Illinois from Sydney, you will be flying from Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney.
How long is the flight from Sydney to Illinois?
Departing from Sydney to Illinois will take you 19h 57m. The distance between Sydney and Illinois is about 14851 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from Sydney to Illinois one-way?
The cheapest airline one-way is Air New Zealand, with whom users have recently found tickets for as low as $760. However, be on the lookout for offers from Qantas Airways and Air Canada, as they are both options that can get you from Sydney to Illinois for a low price.
What are the most popular routes from Sydney to Illinois?
The most popular route from Sydney to Illinois is Sydney Kingsford Smith - Chicago O'Hare Intl. You may also consider Sydney Kingsford Smith - Lambert-St Louis or Sydney Kingsford Smith - Chicago Midway.
Can I find deals for flights from Sydney to Illinois that include hotel bookings?
Yes. In addition to deals on Sydney to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Sydney to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Illinois.
Can I find deals for business class flights from Sydney to Illinois?
Yes. Cheapflights offers flight deals from Sydney to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Sydney to Illinois?
Currently, October is the cheapest month in which you can book a flight from Sydney to Illinois (average of $1,554). Flying from Sydney to Illinois in December is currently the most expensive (average of $2,183). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 5 airlines flying from Sydney to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$960	Average$1,586	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	Cheapest$1,075	Average$1,626	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	Cheapest$1,418	Average$1,896	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Qantas Airways	Cheapest$1,513	Average$1,894	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
Air New Zealand	Cheapest$1,516	Average$1,862	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights

Fly with Cheapflights

How does Cheapflights help users find flights from Sydney to Illinois?

When you search for this flight from Sydney to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Sydney to Illinois?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Sydney to Illinois.

Can Cheapflights find flights from Sydney to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Sydney to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from Sydney to Illinois become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Sydney to Illinois from $706

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Sydney to Illinois

Cheapest flights from Sydney to IllinoisExplore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 October 2026.

Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 October 2026.

Best flights from Sydney to IllinoisDiscover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 October 2026.

Discover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 October 2026.

Last-minute flights from Sydney to IllinoisDiscover last-minute flight deals from Sydney to Illinois. Data last updated 14 October 2026 and is based on user searches.

Discover last-minute flight deals from Sydney to Illinois. Data last updated 14 October 2026 and is based on user searches.

One-way flights from Sydney to IllinoisSearch for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated 14 October 2026.

Search for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated 14 October 2026.

Find flight deals from Sydney to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sydney to Illinois that are best for you.

Best time to book a flight from Sydney to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Sydney with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Sydney to Illinois?

How much does it cost for a return flight from Sydney to Illinois?

Airfare is below average for this route at the moment.

Sydney to Illinois flights typically cost between $1,354 and $1,939 in November.The cheapest return price found within the last 5 days was $1,061 on American Airlines (5 Nov–9 Nov).

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

To ensure you get the cheapest price possible for a flight from Sydney to Illinois, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Illinois

Read through reviews of airlines operating flights from Sydney to Illinois, such as Air New Zealand,Qantas Airways, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Sydney to Illinois?

How long is the flight from Sydney to Illinois?

What are the cheapest airlines to fly from Sydney to Illinois one-way?

What are the most popular routes from Sydney to Illinois?

Can I find deals for flights from Sydney to Illinois that include hotel bookings?

How can I find direct flights from Sydney to Illinois?

Can I find deals for business class flights from Sydney to Illinois?

What is the cheapest month to book a flight from Sydney to Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sydney to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Sydney to Illinois by cabin class

Find flights from Sydney to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Sydney and Illinois flights

Browse other Sydney and Illinois flight options. Last updated on 14 October 2026.

Popular flight searches

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Sydney to Illinois flights

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Top 5 airlines flying from Sydney to Illinois

Fly with Cheapflights

How does Cheapflights help users find flights from Sydney to Illinois?

Why should you use Cheapflights to find cheap flight tickets from Sydney to Illinois?

Can Cheapflights find flights from Sydney to Illinois with no change fees?

Can Cheapflights notify me if prices for flights from Sydney to Illinois become cheaper?

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Cheapest flights from Sydney to Illinois
Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 October 2026.

Best flights from Sydney to Illinois
Discover carefully curated flight deals from Sydney to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 October 2026.

Last-minute flights from Sydney to Illinois
Discover last-minute flight deals from Sydney to Illinois. Data last updated 14 October 2026 and is based on user searches.

One-way flights from Sydney to Illinois
Search for one-way flight options from Sydney to Illinois. Find affordable one-way fares based on user searches. Data last updated 14 October 2026.

Sydney to Illinois flights typically cost between $1,354 and $1,939 in November.
The cheapest return price found within the last 5 days was $1,061 on American Airlines (5 Nov–9 Nov).