How long is the flight from Sydney to Illinois?

Departing from Sydney to Illinois will take you 26h 50m. The distance between Sydney and Illinois is about 14571 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops. Find deals

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

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $775. However, be on the lookout for offers from United Airlines and Air Canada, as they are both options that can get you from Sydney to Illinois for a low price. 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. Find deals

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?

American Airlines, Air Canada and ANA are the most popular airlines when flying from Sydney to Illinois.

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

Find a great deal and save up to 49% by booking at least 44 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Sydney to Illinois within the next two weeks, with the cheapest ticket starting at $1,732.

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

The best pricing can be found in the month of February. Prices to Illinois from Sydney average $1,610. You can even find prices in February for less than $1,610, as users have found deals to Illinois from as low as $994. The month of December appears to be one of the more expensive times to travel to Illinois from Sydney. Flying in the targeted month can save you up to 52%.

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.

$753+ Flights from Sydney to Illinois

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

Airfare is typical for this route at the moment. Sydney to Illinois flights typically cost between $1,386 and $2,019 in September. The cheapest return flight price found within the last 3 days was $1,500 on Air New Zealand (17 Sept-22 Oct). Find deals

Cheap flight deals from Sydney to Illinois

Round-trip from	$1,289
One-way from	$753
Popular in	December
Cheapest in	February
Average price	$1,614

United Airlines
19/9-26/9
4 total stops
59h 13m total
Sydney to Illinois

Search Deals

19/9
3 total stops
44h 12m total
Sydney to Illinois

Search Deals

Highest demand for flights based on searches. 22% potential increase in price ($725 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($120 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Sydney to Illinois

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 21 August 2025.

Fri 19/909:30SYD - STL

2 stops27h 38mUnited Airlines

Fri 26/908:25STL - SYD

2 stops31h 35mUnited Airlines

Deal found 20/8$1,289

Thu 11/909:25SYD - STL

2 stops26h 50mDelta

Sat 13/910:40STL - SYD

2 stops28h 55mDelta

Deal found 19/8$1,344

Fri 19/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Fri 26/914:11STL - SYD

2 stops25h 54mAmerican Airlines

Deal found 20/8$1,392

Thu 11/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Sat 13/914:01STL - SYD

2 stops26h 04mAmerican Airlines

Deal found 19/8$1,452

Wed 17/911:50SYD - ORD

2 stops25h 51mAir New Zealand

Wed 22/1016:40ORD - SYD

2 stops25h 55mAir New Zealand

Deal found 18/8$1,500

Thu 16/1011:50SYD - ORD

2 stops28h 24mAir New Zealand

Wed 22/1016:40ORD - SYD

2 stops25h 55mAir New Zealand

Deal found 19/8$1,572

Fri 5/906:00SYD - ORD

2 stops31h 43mMultiple Airlines

Thu 11/906:30ORD - SYD

2 stops38h 45mMultiple Airlines

Deal found 19/8$1,629

Mon 15/909:10SYD - ORD

1 stop47h 37mAmerican Airlines

Tue 30/917:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,667

Fri 29/813:15SYD - ORD

2 stops24h 56mMultiple Airlines

Fri 5/906:30ORD - SYD

2 stops38h 15mMultiple Airlines

Deal found 19/8$1,701

Wed 20/809:55SYD - ORD

2 stops26h 45mAir New Zealand

Mon 15/916:10ORD - SYD

2 stops25h 35mAir New Zealand

Deal found 19/8$1,704

Fri 12/909:10SYD - ORD

1 stop47h 46mAmerican Airlines

Tue 30/917:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,707

Thu 25/909:10SYD - ORD

1 stop28h 33mMultiple Airlines

Sun 5/1006:30ORD - SYD

1 stop33h 00mMultiple Airlines

Deal found 19/8$1,716

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 21 August 2025.

Fri 19/909:30SYD - STL

2 stops27h 38mUnited Airlines

Fri 26/908:25STL - SYD

2 stops31h 35mUnited Airlines

Deal found 20/8$1,289

Thu 11/909:25SYD - STL

2 stops26h 50mDelta

Sat 13/910:40STL - SYD

2 stops28h 55mDelta

Deal found 19/8$1,344

Fri 19/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Fri 26/914:11STL - SYD

2 stops25h 54mAmerican Airlines

Deal found 20/8$1,392

Wed 17/911:50SYD - ORD

2 stops25h 51mAir New Zealand

Wed 22/1016:40ORD - SYD

2 stops25h 55mAir New Zealand

Deal found 18/8$1,500

Sat 13/909:30SYD - ORD

1 stop28h 43mMultiple Airlines

Sat 27/907:00ORD - SYD

2 stops32h 55mMultiple Airlines

Deal found 18/8$1,530

Tue 2/909:20SYD - STL

2 stops49h 18mAir Canada

Fri 5/916:05STL - SYD

2 stops48h 15mAir Canada

Deal found 18/8$1,966

Thu 11/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Sat 13/914:01STL - SYD

2 stops26h 04mAmerican Airlines

Deal found 19/8$1,452

Thu 16/1011:50SYD - ORD

2 stops28h 24mAir New Zealand

Wed 22/1016:40ORD - SYD

2 stops25h 55mAir New Zealand

Deal found 19/8$1,572

Fri 5/906:00SYD - ORD

2 stops31h 43mMultiple Airlines

Thu 11/906:30ORD - SYD

2 stops38h 45mMultiple Airlines

Deal found 19/8$1,629

Mon 15/909:10SYD - ORD

1 stop47h 37mAmerican Airlines

Tue 30/917:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,667

Fri 3/1010:20SYD - STL

1 stop21h 34mUnited Airlines

Fri 10/1017:35STL - SYD

1 stop22h 20mUnited Airlines

Deal found 19/8$1,998

Tue 16/909:10SYD - ORD

1 stop47h 46mAmerican Airlines

Wed 1/1017:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,667

Last-minute flights from Sydney to Illinois
Discover last-minute flight deals from Sydney to Illinois. Data last updated 21 August 2025 and is based on user searches.

Wed 20/809:55SYD - ORD

2 stops26h 45mAir New Zealand

Mon 15/916:10ORD - SYD

2 stops25h 35mAir New Zealand

Deal found 19/8$1,704

Fri 29/813:15SYD - ORD

2 stops24h 56mMultiple Airlines

Fri 5/906:30ORD - SYD

2 stops38h 15mMultiple Airlines

Deal found 19/8$1,701

Sun 31/809:30SYD - ORD

2 stops27h 10mUnited Airlines

Tue 16/914:53ORD - SYD

2 stops25h 02mUnited Airlines

Deal found 20/8$1,741

Fri 5/906:00SYD - ORD

2 stops31h 43mMultiple Airlines

Thu 11/906:30ORD - SYD

2 stops38h 45mMultiple Airlines

Deal found 19/8$1,629

Thu 11/909:25SYD - STL

2 stops26h 50mDelta

Sat 13/910:40STL - SYD

2 stops28h 55mDelta

Deal found 19/8$1,344

Thu 11/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Sat 13/914:01STL - SYD

2 stops26h 04mAmerican Airlines

Deal found 19/8$1,452

Fri 12/909:10SYD - ORD

1 stop47h 46mAmerican Airlines

Tue 30/917:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,707

Mon 15/909:10SYD - ORD

1 stop47h 37mAmerican Airlines

Tue 30/917:46ORD - SYD

1 stop22h 19mAmerican Airlines

Deal found 20/8$1,667

Wed 17/911:50SYD - ORD

2 stops25h 51mAir New Zealand

Wed 22/1016:40ORD - SYD

2 stops25h 55mAir New Zealand

Deal found 18/8$1,500

Fri 19/909:30SYD - STL

2 stops27h 38mUnited Airlines

Fri 26/908:25STL - SYD

2 stops31h 35mUnited Airlines

Deal found 20/8$1,289

Fri 19/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Fri 26/914:11STL - SYD

2 stops25h 54mAmerican Airlines

Deal found 20/8$1,392

Thu 25/909:10SYD - ORD

1 stop28h 33mMultiple Airlines

Sun 5/1006:30ORD - SYD

1 stop33h 00mMultiple Airlines

Deal found 19/8$1,716

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 21 August 2025.

Fri 19/916:20SYD - ORD

3 stops44h 12mMultiple Airlines

Deal found 19/8$753

Wed 3/1211:50SYD - STL

1 stop27h 08mUnited Airlines

Deal found 18/8$775

Sat 18/1010:20SYD - ORD

1 stop25h 44mAir Canada

Deal found 20/8$887

Sat 6/917:45SYD - ORD

1 stop33h 14mMultiple Airlines

Deal found 19/8$986

Mon 15/909:10SYD - ORD

1 stop24h 04mMultiple Airlines

Deal found 20/8$1,024

Fri 26/917:45SYD - ORD

1 stop39h 29mMultiple Airlines

Deal found 20/8$1,030

Sat 18/1018:45SYD - ORD

2 stops26h 40mMultiple Airlines

Deal found 20/8$1,095

Tue 2/1217:45SYD - STL

1 stop22h 57mMultiple Airlines

Deal found 18/8$1,185

Sat 29/1117:45SYD - STL

1 stop22h 57mAmerican Airlines

Deal found 18/8$1,193

Sun 30/1117:45SYD - STL

2 stops32h 13mAmerican Airlines

Deal found 18/8$1,199

Sat 6/920:20SYD - MDW

3 stops58h 40mMultiple Airlines

Deal found 19/8$1,204

Thu 4/1217:45SYD - STL

3 stops32h 40mMultiple Airlines

Deal found 18/8$1,261

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 19/9

09:30-22:08

2 stops27h 38m

Lambert-St Louis

Fri 26/9

08:25-07:00

2 stops31h 35m

$1,289

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 11/9

09:25-21:15

2 stops26h 50m

Lambert-St Louis

Sat 13/9

10:40-06:35

2 stops28h 55m

$1,344

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 19/9

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Fri 26/9

14:11-07:05

2 stops25h 54m

$1,392

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 11/9

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 13/9

14:01-07:05

2 stops26h 04m

$1,452

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 17/9

11:50-22:41

2 stops25h 51m

Chicago O'Hare Intl

Wed 22/10

16:40-10:35

2 stops25h 55m

$1,500

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 13/9

09:30-23:13

1 stop28h 43m

Chicago O'Hare Intl

Sat 27/9

07:00-06:55

2 stops32h 55m

$1,530

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 16/10

11:50-00:14

2 stops28h 24m

Chicago O'Hare Intl

Wed 22/10

16:40-10:35

2 stops25h 55m

$1,572

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 5/9

06:00-22:43

2 stops31h 43m

Chicago O'Hare Intl

Thu 11/9

06:30-12:15

2 stops38h 45m

$1,629

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 15/9

09:10-17:47

1 stop47h 37m

Chicago O'Hare Intl

Tue 30/9

17:46-07:05

1 stop22h 19m

$1,667

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 16/9

09:10-17:56

1 stop47h 46m

Chicago O'Hare Intl

Wed 1/10

17:46-07:05

1 stop22h 19m

$1,667

Flights are sorted by cheapest return flights first.

Deals found on 19/8

Showing 1-10 of 52 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 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.

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 ANA, Air New Zealand, andQantas Airways. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

ANA

8.4

Very Good

938 reviews

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

Air New Zealand

8.0

Very Good

504 reviews

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

Qantas Airways

7.5

Good

898 reviews

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

United Airlines

7.4

Good

8,930 reviews

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

Air Canada

7.1

Good

10,000 reviews

ANA

8.4

Very Good

938 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

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 26h 50m. The distance between Sydney and Illinois is about 14571 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 Delta, with whom users have recently found tickets for as low as $775. However, be on the lookout for offers from United Airlines 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 - 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.

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

Springfield Capital Airport car hire

Champaign University-Willard Airport car hire

Chicago Greater Rockford Airport car hire

Belleville Airport car hire

Quincy Regional Airport car hire

Marion Williamson County Airport car hire

Top 7 airlines flying from Sydney to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$1,024	Average$1,173	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
American Airlines	Cheapest$1,211	Average$1,263	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest$1,284	Average$1,750	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Air New Zealand	Cheapest$1,583	Average$1,642	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights
ANA	Cheapest$1,632	Average$1,822	FlexibilityNo cancel fee	On-time80%	Search ANA flights
United Airlines	Cheapest$1,685	Average$2,491	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Australia	Cheapest$1,790	Average$2,902	FlexibilityNo cancel fee	On-time80%	Search Virgin Australia 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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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Sydney to Illinois from $753

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Sydney to Illinois

Keep the following information in mind while searching for Sydney to Illinois flight deals. Data was last updated 21 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 21 August 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 21 August 2025.

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

Everything you need to know about your 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 21 August 2025.

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 ANA, Air New Zealand, andQantas Airways. 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.

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?

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.

Top 7 airlines flying from Sydney to Illinois

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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 21 August 2025.