How long is the flight from Illinois to Sydney?

There are many flights that can get you from Illinois to Sydney in 23h 47m. Fly via Qantas Airways, Alaska Airlines, or United Airlines to get the fastest option. The distance from Illinois to Sydney is about 9119 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

What are the most popular routes from Illinois to Sydney?

While some choose either Chicago Midway - Sydney Kingsford Smith or Lambert-St Louis - Sydney Kingsford Smith, Chicago O'Hare Intl - Sydney Kingsford Smith is the most popular route from Illinois to Sydney.

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

Before booking your flight from Illinois to Sydney check out the most popular airlines for this route: American Airlines, Air Canada or Delta.

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

If you book a flight to Sydney from Illinois, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.

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

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

How can I find direct flights from Illinois to Sydney?

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

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

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

$492+ Cheap Flights from Illinois to Sydney

Q: How much does it cost to fly round-trip from Illinois to Sydney?

Airfare is typical for this route at the moment. Illinois to Sydney flights typically cost between $946 and $1,575 in October. The cheapest round-trip price found within the last 3 days was $1,075 on Multiple Airlines (Oct 20-Nov 2).

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Cheap flight deals from Illinois to Sydney

Round-trip from	$1,033 (Trip.com)
One-way from	$492 (Trip.com)
Popular in	December
Cheapest in	August
Average price	$999

From Illinois to Sydney Kingsford Smith

Search Deals

One-way flight from Illinois to Sydney Kingsford Smith

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($184 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

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Find flight deals from Illinois to Sydney

Cheapest flights from Illinois to Sydney
Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Mon 10/2712:03 pmMDW - SYD

2 stops28h 57mMultiple Airlines

Sun 11/92:05 pmSYD - MDW

2 stops24h 58mMultiple Airlines

Deal found 9/15

$1,033

Mon 10/209:44 amMDW - SYD

2 stops30h 21mMultiple Airlines

Sun 11/22:05 pmSYD - MDW

2 stops24h 58mMultiple Airlines

Deal found 9/15

$1,072

Mon 10/2012:28 pmORD - SYD

2 stops27h 37mMultiple Airlines

Sun 11/22:05 pmSYD - ORD

2 stops27h 06mMultiple Airlines

Deal found 9/15

$1,075

Wed 11/57:00 amSTL - SYD

2 stops33h 20mQantas Airways

Sun 11/232:05 pmSYD - STL

1 stop22h 25mQantas Airways

Deal found 9/14

$1,104

Mon 10/275:05 amORD - SYD

2 stops35h 55mMultiple Airlines

Sun 11/92:05 pmSYD - ORD

2 stops27h 06mMultiple Airlines

Deal found 9/15

$1,105

Fri 11/285:50 pmSTL - SYD

2 stops34h 40mQantas Airways

Sun 12/142:05 pmSYD - STL

1 stop22h 22mQantas Airways

Deal found 9/14

$1,108

Wed 12/36:55 amSTL - SYD

2 stops33h 25mQantas Airways

Wed 12/102:05 pmSYD - STL

1 stop19h 29mQantas Airways

Deal found 9/15

$1,127

Mon 9/296:00 amPIA - SYD

2 stops34h 00mUnited Airlines

Sat 10/410:20 amSYD - PIA

2 stops26h 07mUnited Airlines

Deal found 9/16

$1,132

Mon 10/69:48 amORD - SYD

3 stops34h 57mMultiple Airlines

Mon 10/206:00 amSYD - ORD

3 stops34h 17mMultiple Airlines

Deal found 9/15

$1,166

Thu 10/304:14 pmSTL - SYD

2 stops35h 31mAlaska Airlines

Thu 11/69:40 pmSYD - STL

2 stops34h 38mAlaska Airlines

Deal found 9/15

$1,176

Tue 11/257:00 amSTL - SYD

2 stops43h 45mAlaska Airlines

Thu 12/119:40 pmSYD - STL

2 stops43h 19mAlaska Airlines

Deal found 9/14

$1,179

Sat 10/257:25 amORD - SYD

2 stops37h 20mMultiple Airlines

Sat 11/12:30 pmSYD - ORD

2 stops24h 30mMultiple Airlines

Deal found 9/15

$1,187

Best flights from Illinois to Sydney
Discover carefully curated flight deals from Illinois to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2025.

Wed 10/296:39 amSTL - SYD

1 stop34h 21mQantas Airways

Sat 11/157:15 pmSYD - STL

2 stops38h 53mQantas Airways

Deal found 9/16

$1,175

Tue 11/257:00 amSTL - SYD

2 stops43h 45mAlaska Airlines

Thu 12/119:40 pmSYD - STL

2 stops43h 19mAlaska Airlines

Deal found 9/14

$1,179

Fri 10/315:18 pmPIA - SYD

2 stops23h 47mUnited Airlines

Fri 11/711:50 amSYD - PIA

2 stops26h 06mUnited Airlines

Deal found 9/15

$1,235

Fri 10/3111:16 amPIA - SYD

1 stop27h 39mAmerican Airlines

Fri 11/72:05 pmSYD - PIA

1 stop26h 01mAmerican Airlines

Deal found 9/15

$1,347

Thu 10/307:05 pmORD - SYD

2 stops25h 55mMultiple Airlines

Thu 11/62:00 pmSYD - ORD

2 stops24h 24mMultiple Airlines

Deal found 9/15

$1,368

Tue 1/272:40 pmORD - SYD

2 stops26h 50mAir New Zealand

Mon 2/27:15 pmSYD - ORD

2 stops40h 37mAir New Zealand

Deal found 9/15

$1,381

Tue 11/46:03 pmORD - SYD

2 stops34h 47mFiji Airways

Tue 12/92:10 pmSYD - ORD

2 stops24h 15mFiji Airways

Deal found 9/14

$1,417

Mon 1/1211:50 amORD - SYD

2 stops38h 30mTurkish Airlines

Mon 1/269:15 pmSYD - ORD

2 stops38h 10mTurkish Airlines

Deal found 9/15

$1,449

Tue 11/183:52 pmORD - SYD

2 stops23h 38mDelta

Sun 12/710:40 amSYD - ORD

2 stops30h 21mDelta

Deal found 9/13

$1,467

Wed 10/2910:51 amPIA - SYD

2 stops28h 09mUnited Airlines

Wed 11/511:50 amSYD - PIA

2 stops21h 50mUnited Airlines

Deal found 9/14

$1,235

Wed 11/57:00 amSTL - SYD

2 stops33h 20mQantas Airways

Sun 11/237:20 amSYD - STL

2 stops22h 17mQantas Airways

Deal found 9/16

$1,310

Thu 11/66:03 pmORD - SYD

2 stops25h 57mMultiple Airlines

Tue 11/112:10 pmSYD - ORD

2 stops22h 30mMultiple Airlines

Deal found 9/14

$1,388

Mon 11/171:00 pmORD - SYD

2 stops26h 45mAir New Zealand

Mon 12/112:10 pmSYD - ORD

1 stop29h 49mAir New Zealand

Deal found 9/15

$1,389

Sat 11/224:57 pmORD - SYD

2 stops35h 53mFiji Airways

Tue 12/92:10 pmSYD - ORD

2 stops24h 15mFiji Airways

Deal found 9/13

$1,436

Sun 11/169:41 amMDW - SYD

2 stops29h 49mDelta

Mon 12/810:40 amSYD - MDW

2 stops22h 56mDelta

Deal found 9/13

$1,467

Wed 11/267:00 amSTL - SYD

2 stops34h 20mQantas Airways

Wed 12/177:05 amSYD - STL

2 stops29h 24mQantas Airways

Deal found 9/14

$1,346

Wed 11/264:43 pmSTL - SYD

2 stops23h 22mUnited Airlines

Mon 12/1511:50 amSYD - STL

1 stop27h 08mUnited Airlines

Deal found 9/14

$1,356

Sun 1/256:29 pmORD - SYD

1 stop21h 46mAir New Zealand

Mon 2/21:55 pmSYD - ORD

2 stops22h 58mAir New Zealand

Deal found 9/15

$1,402

Sun 1/1810:35 amMDW - SYD

2 stops27h 15mDelta

Tue 1/272:15 pmSYD - MDW

2 stops24h 31mDelta

Deal found 9/15

$1,467

Wed 11/267:00 amSTL - SYD

2 stops33h 20mQantas Airways

Tue 12/166:05 amSYD - STL

2 stops34h 52mQantas Airways

Deal found 9/14

$1,346

Sun 11/305:29 pmSTL - SYD

1 stop22h 46mUnited Airlines

Tue 12/1611:50 amSYD - STL

1 stop21h 14mUnited Airlines

Deal found 9/14

$1,356

Sun 1/251:00 pmMDW - SYD

2 stops26h 30mDelta

Mon 2/210:40 amSYD - MDW

2 stops24h 28mDelta

Deal found 9/15

$1,467

Fri 11/285:50 pmSTL - SYD

2 stops24h 05mQantas Airways

Sun 12/142:05 pmSYD - STL

1 stop20h 00mQantas Airways

Deal found 9/16

$1,351

Sat 11/291:35 pmSTL - SYD

2 stops26h 40mUnited Airlines

Wed 12/1711:50 amSYD - STL

1 stop21h 14mUnited Airlines

Deal found 9/14

$1,356

Tue 12/99:34 amMDW - SYD

2 stops29h 56mDelta

Tue 12/2310:40 amSYD - MDW

2 stops23h 39mDelta

Deal found 9/14

$1,467

Sun 11/306:13 pmSTL - SYD

2 stops23h 42mQantas Airways

Thu 12/116:05 amSYD - STL

2 stops23h 27mQantas Airways

Deal found 9/14

$1,352

Thu 11/133:30 pmPIA - SYD

2 stops24h 45mUnited Airlines

Mon 11/1712:10 pmSYD - PIA

2 stops26h 21mUnited Airlines

Deal found 9/14

$1,371

Mon 11/101:47 pmMDW - SYD

2 stops25h 43mDelta

Wed 11/2610:40 amSYD - MDW

2 stops24h 28mDelta

Deal found 9/15

$1,467

Mon 9/295:11 pmPIA - SYD

1 stop22h 44mAmerican Airlines

Sat 10/49:10 amSYD - PIA

2 stops27h 26mAmerican Airlines

Deal found 9/16

$2,152

Sat 11/293:59 pmSTL - SYD

2 stops28h 56mQantas Airways

Tue 12/169:10 amSYD - STL

2 stops31h 47mQantas Airways

Deal found 9/14

$1,352

Last-minute flights from Illinois to Sydney
Discover last-minute flight deals from Illinois to Sydney. Data last updated September 16, 2025 and is based on user searches.

Mon 9/296:00 amPIA - SYD

2 stops34h 00mUnited Airlines

Sat 10/410:20 amSYD - PIA

2 stops26h 07mUnited Airlines

Deal found 9/16

$1,132

Mon 10/69:48 amORD - SYD

3 stops34h 57mMultiple Airlines

Mon 10/206:00 amSYD - ORD

3 stops34h 17mMultiple Airlines

Deal found 9/15

$1,166

Mon 10/209:44 amMDW - SYD

2 stops30h 21mMultiple Airlines

Sun 11/22:05 pmSYD - MDW

2 stops24h 58mMultiple Airlines

Deal found 9/15

$1,072

Mon 10/2012:28 pmORD - SYD

2 stops27h 37mMultiple Airlines

Sun 11/22:05 pmSYD - ORD

2 stops27h 06mMultiple Airlines

Deal found 9/15

$1,075

Wed 10/228:00 amORD - SYD

2 stops31h 30mMultiple Airlines

Fri 10/246:45 pmSYD - ORD

1 stop21h 14mMultiple Airlines

Deal found 9/14

$1,209

Sat 10/257:25 amORD - SYD

2 stops37h 20mMultiple Airlines

Sat 11/12:30 pmSYD - ORD

2 stops24h 30mMultiple Airlines

Deal found 9/15

$1,187

Mon 10/2712:03 pmMDW - SYD

2 stops28h 57mMultiple Airlines

Sun 11/92:05 pmSYD - MDW

2 stops24h 58mMultiple Airlines

Deal found 9/15

$1,033

Mon 10/275:05 amORD - SYD

2 stops35h 55mMultiple Airlines

Sun 11/92:05 pmSYD - ORD

2 stops27h 06mMultiple Airlines

Deal found 9/15

$1,105

Wed 10/291:35 pmSTL - SYD

2 stops27h 00mAir Canada

Wed 11/511:20 amSYD - STL

2 stops22h 08mAir Canada

Deal found 9/14

$1,195

Wed 10/298:00 amORD - SYD

2 stops31h 25mMultiple Airlines

Sat 11/15:45 pmSYD - ORD

1 stop21h 15mMultiple Airlines

Deal found 9/14

$1,205

Thu 10/304:14 pmSTL - SYD

2 stops35h 31mAlaska Airlines

Thu 11/69:40 pmSYD - STL

2 stops34h 38mAlaska Airlines

Deal found 9/15

$1,176

Thu 10/301:35 pmSTL - SYD

2 stops27h 00mAir Canada

Thu 11/611:20 amSYD - STL

2 stops45h 09mAir Canada

Deal found 9/15

$1,199

One-way flights from Illinois to Sydney
Search for one-way flight options from Illinois to Sydney. Find affordable one-way fares based on user searches. Data last updated September 16, 2025.

Sat 1/177:45 amORD - SYD

2 stops32h 15mMultiple Airlines

Deal found 9/14

$492

Sat 10/258:00 amORD - SYD

2 stops33h 00mMultiple Airlines

Deal found 9/14

$527

Mon 11/106:00 amORD - SYD

3 stops32h 25mMultiple Airlines

Deal found 9/14

$537

Mon 10/209:44 amMDW - SYD

2 stops30h 21mMultiple Airlines

Deal found 9/14

$542

Mon 10/2012:28 pmORD - SYD

2 stops27h 37mMultiple Airlines

Deal found 9/14

$544

Thu 11/136:00 amORD - SYD

3 stops32h 25mMultiple Airlines

Deal found 9/14

$545

Sat 11/88:00 amORD - SYD

2 stops53h 10mMultiple Airlines

Deal found 9/15

$561

Fri 11/76:03 pmORD - SYD

2 stops32h 52mMultiple Airlines

Deal found 9/14

$622

Mon 3/25:49 pmSTL - SYD

2 stops25h 26mQantas Airways

Deal found 9/15

$692

Sun 3/86:15 amSTL - SYD

2 stops47h 35mMultiple Airlines

Deal found 9/15

$697

Tue 10/146:33 amSTL - SYD

3 stops58h 27mMultiple Airlines

Deal found 9/14

$699

Tue 9/303:59 pmSTL - SYD

2 stops39h 11mFiji Airways

Deal found 9/15

$730

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 10/29

6:39 am-9:00 am

1 stop34h 21m

Sydney Kingsford Smith

Sat 11/15

7:15 pm-5:08 pm

2 stops38h 53m

$1,175

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 11/25

7:00 am-7:45 pm

2 stops43h 45m

Sydney Kingsford Smith

Thu 12/11

9:40 pm-11:59 pm

2 stops43h 19m

$1,179

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Fri 10/31

5:18 pm-9:05 am

2 stops23h 47m

Sydney Kingsford Smith

Fri 11/7

11:50 am-8:56 pm

2 stops26h 06m

$1,235

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Wed 10/29

10:51 am-7:00 am

2 stops28h 09m

Sydney Kingsford Smith

Wed 11/5

11:50 am-4:40 pm

2 stops21h 50m

$1,235

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/5

7:00 am-9:20 am

2 stops33h 20m

Sydney Kingsford Smith

Sun 11/23

7:20 am-12:37 pm

2 stops22h 17m

$1,310

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/26

7:00 am-10:20 am

2 stops34h 20m

Sydney Kingsford Smith

Wed 12/17

7:05 am-7:29 pm

2 stops29h 24m

$1,346

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/26

7:00 am-9:20 am

2 stops33h 20m

Sydney Kingsford Smith

Tue 12/16

6:05 am-11:57 pm

2 stops34h 52m

$1,346

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Fri 10/31

11:16 am-6:55 am

1 stop27h 39m

Sydney Kingsford Smith

Fri 11/7

2:05 pm-11:06 pm

1 stop26h 01m

$1,347

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 11/28

5:50 pm-10:55 am

2 stops24h 05m

Sydney Kingsford Smith

Sun 12/14

2:05 pm-5:05 pm

1 stop20h 00m

$1,351

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 11/30

6:13 pm-10:55 am

2 stops23h 42m

Sydney Kingsford Smith

Thu 12/11

6:05 am-12:32 pm

2 stops23h 27m

$1,352

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 58 results

...

Best time to book a flight from Illinois to Sydney

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

Estimated round-trip 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 Illinois to Sydney

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Sydney (average of $1,032). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,627). 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 IL to SYD?

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

How much does it cost to fly round-trip from Illinois to Sydney?

Related info for your journey

What airport do you fly into for flights to Sydney from Illinois?
If you book a flight to Sydney from Illinois, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.
How long is the flight from Illinois to Sydney?
There are many flights that can get you from Illinois to Sydney in 23h 47m. Fly via Qantas Airways, Alaska Airlines, or United Airlines to get the fastest option. The distance from Illinois to Sydney is about 9119 mi. This flight may include one or multiple stops.
What are the most popular routes from Illinois to Sydney?
While some choose either Chicago Midway - Sydney Kingsford Smith or Lambert-St Louis - Sydney Kingsford Smith, Chicago O'Hare Intl - Sydney Kingsford Smith is the most popular route from Illinois to Sydney.
Can I find deals for flights from Illinois to Sydney that include hotel bookings?
Yes. In addition to deals on Illinois to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Sydney.
Can I find deals for business class flights from Illinois to Sydney?
Yes. Cheapflights offers flight deals from Illinois to Sydney 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 Illinois to Sydney?
Currently, March is the cheapest month in which you can book a flight from Illinois to Sydney (average of $1,032). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,627). 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 8 airlines flying from Illinois to Sydney

Airline	Cheapest	Average	Flexibility	On-time
ANA	Cheapest$679	Average$1,186	FlexibilityNo cancel fee	On-time80%
Qantas Airways	Cheapest$812	Average$943	FlexibilityNo cancel fee	On-time74%
American Airlines	Cheapest$823	Average$1,417	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$846	Average$1,034	FlexibilityNo cancel fee	On-timeN/A
Fiji Airways	Cheapest$849	Average$1,181	FlexibilityNo cancel fee	On-time74%
United Airlines	Cheapest$876	Average$1,233	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$959	Average$1,301	FlexibilityNo cancel fee	On-time67%
Air New Zealand	Cheapest$1,282	Average$1,407	FlexibilityNo cancel fee	On-time78%

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$492+ Cheap flights from Illinois to Sydney (SYD)

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Illinois to Sydney

Keep the following information in mind while searching for Illinois to Sydney flight deals. Data was last updated September 16, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Illinois to Sydney

Cheapest flights from Illinois to SydneyExplore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Illinois to Sydney

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Illinois to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

How much does it cost to fly round-trip from Illinois to Sydney?

Related info for your journey

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

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

How long is the flight from Illinois to Sydney?

What are the most popular routes from Illinois to Sydney?

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

How can I find direct flights from Illinois to Sydney?

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

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

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Alternative routes for Illinois to Sydney

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Top 8 airlines flying from Illinois to Sydney

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Cheapest flights from Illinois to Sydney
Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.