How long is the flight from Sydney to Illinois?

Departing from Sydney to Illinois will take you 23h 49m. The distance between Sydney and Illinois is about 14861 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops. Find deals

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 - Chicago Midway or Sydney Kingsford Smith - Lambert-St Louis.

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

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

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.

$969+ Flights from Sydney to Illinois

Q: 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 $1,762 and $2,639 in February. The cheapest return flight price found within the last 3 days was $1,523 on Air Canada (2 Feb-19 Feb). Find deals

Cheap flight deals from Sydney to Illinois

Enter your travel dates to find the best prices.

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 12 December 2025.

Tue 30/1212:10SYD - ORD

1 stop28h 04mUnited Airlines

Wed 14/118:30ORD - SYD

1 stop21h 35mUnited Airlines

Deal found 10/12$1,724

Tue 23/1212:10SYD - ORD

1 stop19h 45mUnited Airlines

Mon 2/213:55ORD - SYD

2 stops26h 10mUnited Airlines

Deal found 11/12$1,727

Mon 15/1212:10SYD - ORD

2 stops21h 48mUnited Airlines

Fri 9/116:16ORD - SYD

1 stop21h 04mUnited Airlines

Deal found 10/12$1,799

Wed 17/1211:20SYD - ORD

1 stop20h 05mUnited Airlines

Thu 22/116:10ORD - SYD

1 stop23h 55mUnited Airlines

Deal found 10/12$1,801

Thu 25/1212:10SYD - ORD

2 stops21h 49mUnited Airlines

Thu 22/114:36ORD - SYD

2 stops25h 29mUnited Airlines

Deal found 11/12$1,802

Sun 14/1212:10SYD - ORD

1 stop28h 00mUnited Airlines

Fri 2/114:40ORD - SYD

1 stop22h 40mUnited Airlines

Deal found 10/12$1,874

Tue 23/1211:20SYD - ORD

1 stop20h 12mVirgin Australia

Mon 2/213:00ORD - SYD

1 stop27h 05mVirgin Australia

Deal found 11/12$2,026

Thu 25/1212:10SYD - ORD

1 stop24h 55mVirgin Australia

Thu 22/116:10ORD - SYD

1 stop23h 55mVirgin Australia

Deal found 11/12$2,101

Wed 31/1211:50SYD - ORD

1 stop22h 15mUnited Airlines

Thu 15/114:40ORD - SYD

1 stop25h 25mUnited Airlines

Deal found 11/12$2,197

Fri 26/1211:20SYD - ORD

1 stop35h 45mAmerican Airlines

Tue 6/115:23ORD - SYD

2 stops30h 02mAmerican Airlines

Deal found 10/12$2,370

Fri 26/1210:40SYD - MDW

2 stops28h 42mDelta

Tue 6/113:28MDW - SYD

2 stops24h 22mDelta

Deal found 10/12$2,589

Sun 28/1210:40SYD - MDW

2 stops28h 42mDelta

Thu 8/111:21MDW - SYD

2 stops26h 29mDelta

Deal found 10/12$3,139

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 12 December 2025.

Sat 24/106:20SYD - STL

2 stops25h 21mMultiple Airlines

Sat 31/117:04STL - SYD

2 stops36h 11mMultiple Airlines

Deal found 9/12$1,660

Tue 30/1212:10SYD - ORD

1 stop28h 04mUnited Airlines

Wed 14/118:30ORD - SYD

1 stop21h 35mUnited Airlines

Deal found 10/12$1,724

Wed 4/210:40SYD - ORD

2 stops23h 17mDelta

Sun 3/519:59ORD - SYD

2 stops43h 36mDelta

Deal found 11/12$1,727

Mon 12/118:35SYD - STL

2 stops46h 24mQantas Airways

Tue 27/117:04STL - SYD

2 stops24h 51mQantas Airways

Deal found 11/12$2,001

Mon 12/111:20SYD - STL

2 stops42h 56mAir Canada

Sun 25/116:05STL - SYD

2 stops48h 30mAir Canada

Deal found 11/12$2,286

Tue 13/111:20SYD - STL

1 stop29h 39mAmerican Airlines

Tue 27/107:04STL - SYD

1 stop32h 56mAmerican Airlines

Deal found 11/12$2,343

Wed 4/212:10SYD - ORD

2 stops21h 54mUnited Airlines

Sun 3/516:40ORD - SYD

1 stop23h 15mUnited Airlines

Deal found 11/12$1,727

Sun 25/111:20SYD - ORD

1 stop20h 21mMultiple Airlines

Fri 30/115:35ORD - SYD

2 stops28h 25mMultiple Airlines

Deal found 10/12$1,729

Tue 3/210:40SYD - MDW

2 stops23h 49mDelta

Fri 20/213:49MDW - SYD

2 stops25h 41mDelta

Deal found 11/12$1,802

Tue 3/214:00SYD - ORD

1 stop21h 48mUnited Airlines

Sat 2/521:20ORD - SYD

1 stop42h 35mUnited Airlines

Deal found 11/12$1,727

Mon 2/210:40SYD - MDW

2 stops24h 15mDelta

Thu 19/212:46MDW - SYD

2 stops25h 04mDelta

Deal found 11/12$1,802

Mon 12/121:55SYD - STL

2 stops43h 04mQantas Airways

Mon 26/117:04STL - SYD

2 stops47h 26mQantas Airways

Deal found 11/12$2,056

Tue 23/1214:00SYD - ORD

1 stop24h 32mUnited Airlines

Mon 9/218:29ORD - SYD

1 stop21h 46mUnited Airlines

Deal found 11/12$1,727

Sun 1/210:40SYD - MDW

2 stops24h 56mDelta

Wed 18/213:28MDW - SYD

2 stops26h 02mDelta

Deal found 11/12$1,802

Mon 23/310:20SYD - ORD

2 stops22h 40mUnited Airlines

Sun 5/421:10ORD - SYD

1 stop42h 50mUnited Airlines

Deal found 11/12$1,727

Tue 13/122:00SYD - STL

2 stops42h 59mQantas Airways

Wed 28/111:55STL - SYD

2 stops27h 40mQantas Airways

Deal found 11/12$2,121

Mon 2/211:50SYD - ORD

1 stop19h 50mUnited Airlines

Sat 2/521:20ORD - SYD

1 stop42h 35mUnited Airlines

Deal found 11/12$1,727

Thu 5/211:20SYD - ORD

2 stops22h 44mUnited Airlines

Sun 3/518:20ORD - SYD

1 stop21h 35mUnited Airlines

Deal found 11/12$1,727

Thu 28/509:25SYD - MDW

2 stops23h 40mDelta

Sat 13/613:05MDW - SYD

2 stops26h 30mDelta

Deal found 10/12$2,140

Sat 7/314:15SYD - MDW

2 stops25h 27mDelta

Sat 14/314:03MDW - SYD

2 stops25h 22mDelta

Deal found 11/12$2,218

Tue 13/110:40SYD - STL

2 stops21h 08mDelta

Sat 24/117:04STL - SYD

2 stops44h 46mDelta

Deal found 11/12$2,369

Mon 12/112:10SYD - STL

1 stop20h 27mUnited Airlines

Wed 28/117:00STL - SYD

1 stop23h 15mUnited Airlines

Deal found 11/12$2,369

Mon 26/110:40SYD - MDW

2 stops23h 49mDelta

Mon 2/212:48MDW - SYD

2 stops26h 42mDelta

Deal found 11/12$2,369

Mon 12/112:10SYD - STL

1 stop20h 27mUnited Airlines

Mon 26/110:07STL - SYD

1 stop27h 53mUnited Airlines

Deal found 11/12$2,369

Sat 24/114:15SYD - MDW

2 stops25h 07mDelta

Sat 31/113:26MDW - SYD

2 stops26h 04mDelta

Deal found 10/12$2,514

Mon 12/114:00SYD - STL

2 stops23h 58mUnited Airlines

Tue 27/117:00STL - SYD

1 stop23h 15mUnited Airlines

Deal found 11/12$2,369

Sat 27/1210:40SYD - MDW

2 stops23h 39mDelta

Wed 7/111:21MDW - SYD

2 stops28h 09mDelta

Deal found 10/12$2,589

Tue 13/111:50SYD - STL

1 stop21h 02mUnited Airlines

Mon 26/113:15STL - SYD

2 stops27h 00mUnited Airlines

Deal found 11/12$2,369

Fri 26/1210:40SYD - MDW

2 stops28h 42mDelta

Tue 6/113:28MDW - SYD

2 stops24h 22mDelta

Deal found 10/12$2,589

Sun 25/110:40SYD - MDW

2 stops24h 56mDelta

Fri 30/110:48MDW - SYD

2 stops28h 42mDelta

Deal found 10/12$2,664

Last-minute flights from Sydney to Illinois
Discover last-minute flight deals from Sydney to Illinois. Data last updated 12 December 2025 and is based on user searches.

Tue 23/1214:00SYD - ORD

1 stop24h 32mUnited Airlines

Mon 9/218:29ORD - SYD

1 stop21h 46mUnited Airlines

Deal found 11/12$1,727

Tue 30/1211:20SYD - ORD

1 stop22h 15mUnited Airlines

Wed 14/113:55ORD - SYD

2 stops26h 10mUnited Airlines

Deal found 10/12$1,724

Mon 12/118:35SYD - STL

2 stops46h 24mQantas Airways

Tue 27/117:04STL - SYD

2 stops24h 51mQantas Airways

Deal found 11/12$2,001

Sat 24/106:20SYD - STL

2 stops25h 21mMultiple Airlines

Sat 31/117:04STL - SYD

2 stops36h 11mMultiple Airlines

Deal found 9/12$1,660

Sun 25/111:20SYD - ORD

1 stop20h 21mMultiple Airlines

Fri 30/115:35ORD - SYD

2 stops28h 25mMultiple Airlines

Deal found 10/12$1,729

Mon 26/109:55SYD - ORD

2 stops25h 57mAir New Zealand

Mon 2/215:53ORD - SYD

2 stops23h 52mAir New Zealand

Deal found 11/12$1,573

Mon 26/108:30SYD - ORD

2 stops25h 12mAir Canada

Mon 2/215:35ORD - SYD

1 stop25h 00mAir Canada

Deal found 11/12$1,673

Fri 30/111:20SYD - ORD

2 stops27h 45mAir Canada

Mon 16/213:05ORD - SYD

1 stop27h 30mAir Canada

Deal found 11/12$1,723

Fri 30/111:20SYD - ORD

2 stops27h 45mAir Canada

Sun 22/220:40ORD - SYD

2 stops43h 55mAir Canada

Deal found 11/12$1,732

Fri 30/111:20SYD - ORD

1 stop20h 21mAir Canada

Wed 6/515:40ORD - SYD

1 stop24h 40mAir Canada

Deal found 11/12$1,741

Fri 30/111:20SYD - ORD

1 stop20h 21mAir Canada

Tue 17/215:35ORD - SYD

1 stop25h 00mAir Canada

Deal found 11/12$1,744

Sat 31/109:00SYD - ORD

2 stops22h 41mAir Canada

Wed 18/211:11ORD - SYD

2 stops29h 24mAir Canada

Deal found 11/12$1,745

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 12 December 2025.

Mon 23/317:00SYD - ORD

3 stops52h 00mMultiple Airlines

Deal found 10/12$969

Mon 23/311:45SYD - ORD

2 stops25h 53mAir New Zealand

Deal found 10/12$976

Thu 7/511:55SYD - ORD

2 stops27h 50mAir New Zealand

Deal found 10/12$982

Thu 15/121:30SYD - ORD

3 stops54h 52mMultiple Airlines

Deal found 10/12$1,071

Tue 16/1210:05SYD - STL

2 stops30h 52mQantas Airways

Deal found 11/12$1,116

Tue 10/211:20SYD - ORD

2 stops22h 48mAir Canada

Deal found 11/12$1,170

Wed 14/121:30SYD - ORD

3 stops43h 12mMultiple Airlines

Deal found 9/12$1,179

Fri 10/412:15SYD - ORD

3 stops42h 43mMultiple Airlines

Deal found 11/12$1,230

Thu 15/107:50SYD - MDW

3 stops49h 33mMultiple Airlines

Deal found 10/12$1,256

Thu 7/510:10SYD - ORD

1 stop43h 15mCathay Pacific

Deal found 10/12$1,266

Mon 23/309:40SYD - MDW

2 stops24h 15mDelta

Deal found 10/12$1,317

Wed 14/121:40SYD - MDW

3 stops43h 22mMultiple Airlines

Deal found 9/12$1,398

Find flight deals from Sydney to Illinois

Round-trip from	$1,523
One-way from	$969
Popular in	December
Cheapest in	March
Average price	$2,199

Air Canada
2/2-19/2
3 total stops
50h 21m total
Sydney to Illinois

Search Deals

23/3
3 total stops
52h 00m total
Sydney to Illinois

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($545 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($102 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 24/1

06:20-14:41

2 stops25h 21m

Lambert-St Louis

Sat 31/1

17:04-22:15

2 stops36h 11m

$1,660

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 30/12

12:10-23:14

1 stop28h 04m

Chicago O'Hare Intl

Wed 14/1

18:30-09:05

1 stop21h 35m

$1,724

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 4/2

10:40-16:57

2 stops23h 17m

Chicago O'Hare Intl

Sun 3/5

19:59-06:35

2 stops43h 36m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 4/2

12:10-17:04

2 stops21h 54m

Chicago O'Hare Intl

Sun 3/5

16:40-06:55

1 stop23h 15m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 3/2

14:00-18:48

1 stop21h 48m

Chicago O'Hare Intl

Sat 2/5

21:20-06:55

1 stop42h 35m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 23/12

14:00-21:32

1 stop24h 32m

Chicago O'Hare Intl

Mon 9/2

18:29-09:15

1 stop21h 46m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 23/3

10:20-17:00

2 stops22h 40m

Chicago O'Hare Intl

Sun 5/4

21:10-07:00

1 stop42h 50m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/2

11:50-14:40

1 stop19h 50m

Chicago O'Hare Intl

Sat 2/5

21:20-06:55

1 stop42h 35m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/2

11:20-17:04

2 stops22h 44m

Chicago O'Hare Intl

Sun 3/5

18:20-06:55

1 stop21h 35m

$1,727

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 25/1

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Fri 30/1

15:35-13:00

2 stops28h 25m

$1,729

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 54 results

...

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.

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

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

Currently, September is the cheapest month in which you can book a flight from Sydney to Illinois (average of $931). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,541). 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.

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

One of the essential ways to save on airfare from Sydney to Illinois is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.

What is the cheapest day to fly from Sydney to Illinois?

Travellers seeking maximum savings on their Sydney to Illinois flight should consider departing on Monday at midday when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

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

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

Air New Zealand

8.0

Very Good

552 reviews

Air New Zealand

8.0

Very Good

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

Qantas Airways

7.5

Good

947 reviews

Air New Zealand

8.0

Very Good

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

United Airlines

7.4

Good

9,095 reviews

Air New Zealand

8.0

Very Good

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

American Airlines

7.2

Good

11,050 reviews

Air New Zealand

8.0

Very Good

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

Air Canada

7.1

Good

10,516 reviews

Air New Zealand

8.0

Very Good

552 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

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 23h 49m. The distance between Sydney and Illinois is about 14861 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
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 - Chicago Midway or Sydney Kingsford Smith - Lambert-St Louis.
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, September is the cheapest month in which you can book a flight from Sydney to Illinois (average of $931). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,541). 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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Illinois car hire

Chicago O'Hare Intl Airport car hire

Chicago Midway Airport car hire

Moline Quad-City Airport car hire

Greater Peoria Airport car hire

Chicago Greater Rockford Airport car hire

Springfield Capital Airport car hire

Champaign University-Willard Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Quincy Regional Airport car hire

Top 6 airlines flying from Sydney to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$987	Average$1,122	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
American Airlines	Cheapest$1,171	Average$1,220	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest$1,174	Average$1,668	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Air New Zealand	Cheapest$1,421	Average$1,582	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights
ANA	Cheapest$1,578	Average$1,707	FlexibilityNo cancel fee	On-time80%	Search ANA flights
United Airlines	Cheapest$1,601	Average$2,272	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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 $969

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/3. 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 12 December 2025.

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 12 December 2025.

Find flight deals from Sydney to Illinois

Keep the following information in mind while searching for Sydney to Illinois flight deals. Data was last updated 12 December 2025.

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Best time to book a flight from Sydney to Illinois

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

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

Find hourly flight availability from Sydney to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

What is the cheapest day to fly from Sydney to Illinois?

Use this chart to determine the cheapest time to fly return from Sydney to Illinois. Price data was last updated on 16 December 2024.

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

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

Find useful and relevant information for your journey from Sydney to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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Alternative routes for Sydney to Illinois

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Top 6 airlines flying from Sydney to Illinois

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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 12 December 2025.