Find flights
When to book
Airlines
FAQs

Cheap flights from Sydney to Illinois from $936

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
13 Dec — 20 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 13 November 2025.

Mon 1/1211:20SYD - ORD
1 stop21h 48mAmerican Airlines
Tue 16/1211:45ORD - SYD
1 stop28h 15mAmerican Airlines
Deal found 11/11$1,559
Thu 13/1112:25SYD - ORD
1 stop42h 25mANA
Wed 26/1118:00ORD - SYD
2 stops33h 15mANA
Deal found 12/11$1,714
Sat 15/1109:55SYD - ORD
2 stops25h 55mAir New Zealand
Mon 29/1212:50ORD - SYD
2 stops30h 50mAir New Zealand
Deal found 11/11$1,946
Thu 13/1111:20SYD - ORD
1 stop20h 21mAir Canada
Wed 26/1115:40ORD - SYD
1 stop24h 55mAir Canada
Deal found 12/11$1,992
Sun 16/1111:20SYD - ORD
1 stop20h 21mAir Canada
Wed 19/1115:40ORD - SYD
1 stop24h 55mAir Canada
Deal found 10/11$2,127
Sat 15/1111:20SYD - ORD
1 stop20h 21mAir Canada
Mon 29/1220:15ORD - SYD
2 stops44h 20mAir Canada
Deal found 11/11$2,147
Sun 16/1115:15SYD - ORD
1 stop38h 40mCathay Pacific
Wed 19/1114:35ORD - SYD
1 stop26h 00mCathay Pacific
Deal found 10/11$2,186
Wed 17/1214:05SYD - ORD
1 stop20h 07mAmerican Airlines
Thu 22/111:56ORD - SYD
1 stop25h 59mAmerican Airlines
Deal found 11/11$2,196
Sat 27/1214:15SYD - STL
2 stops35h 43mDelta
Sat 3/107:00STL - SYD
2 stops30h 50mDelta
Deal found 12/11$2,333
Sat 27/1212:10SYD - STL
2 stops22h 44mUnited Airlines
Sat 3/118:35STL - SYD
2 stops43h 25mUnited Airlines
Deal found 12/11$2,445
Thu 13/1110:40SYD - MDW
2 stops24h 38mDelta
Wed 26/1113:15MDW - SYD
2 stops26h 15mDelta
Deal found 12/11$2,520
Fri 26/1211:50SYD - STL
1 stop27h 05mUnited Airlines
Fri 2/106:00STL - SYD
2 stops31h 20mUnited Airlines
Deal found 11/11$2,522

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 13 November 2025.

Round-trip from

$1,495

One-way from

$936

Popular in

December

Cheapest in

March

Average price

$1,767
Air New Zealand
  • Air New Zealand
  • 2/2-8/2
  • 4 total stops
  • 52h 42m total
  • Sydney to Illinois
Search Deals
Air New Zealand
  • Air New Zealand
  • 26/11
  • 2 total stops
  • 24h 45m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($566 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($94 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sydney to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 13 November 2025.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.

Fly from

Sydney

Fly to

Illinois

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 1/12

11:20-17:45

1 stop23h 25m

Chicago O'Hare Intl

Tue 16/12

15:05-09:00

2 stops24h 55m

$1,559

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,741

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/2

09:55-18:52

2 stops25h 57m

Chicago O'Hare Intl

Thu 19/2

14:35-08:45

2 stops25h 10m

$1,804

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 12/2

09:55-20:23

2 stops27h 28m

Chicago O'Hare Intl

Wed 6/5

16:17-10:35

2 stops27h 18m

$1,902

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/2

11:20-16:42

1 stop22h 22m

Chicago O'Hare Intl

Sun 8/2

15:40-09:35

1 stop24h 55m

$1,962

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 7/3

11:20-19:30

2 stops25h 10m

Chicago O'Hare Intl

Thu 12/3

07:15-08:35

3 stops33h 20m

$1,971

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 19/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Mon 2/3

15:40-09:35

1 stop24h 55m

$1,972

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 12/2

19:00-19:35

2 stops41h 35m

Chicago O'Hare Intl

Tue 5/5

00:30-07:40

2 stops40h 10m

$2,007

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 1/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Sat 9/5

18:30-07:20

2 stops45h 50m

$2,040

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/2

12:25-05:15

2 stops33h 50m

Chicago O'Hare Intl

Sun 8/2

16:25-20:15

1 stop34h 50m

$2,075

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 50 results
1
2
3
...
5

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 $949). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,599). 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?

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 13 November 2025.

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 at midday could potentially save you up to 28% on airfare.

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.

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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 13 November 2025.
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
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very Good
1,003 reviews
ANA
8.4
Very Good
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Air New Zealand
8.0
Very Good
526 reviews
ANA
8.4
Very Good
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Qantas Airways
7.5
Good
933 reviews
ANA
8.4
Very Good
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
United Airlines
7.4
Good
9,015 reviews
ANA
8.4
Very Good
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Air Canada
7.1
Good
10,444 reviews
ANA
8.4
Very Good
1,003 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.9

Food

7.7

Boarding

8.6

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sept 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

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?

    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 25m. 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 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 $949). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,599). 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

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.
Sydney to Los Angeles flights
Sydney to Dallas/Fort Worth flights
Sydney to Honolulu flights
Sydney to John F Kennedy Intl flights
Sydney to Newark flights
Sydney to Las Vegas flights
Sydney to LaGuardia flights
Sydney to San Francisco flights
Sydney to Ontario flights
Sydney to Hobby flights
Sydney to George Bush Intcntl flights
Sydney to Long Beach flights
Sydney to Seattle flights
Sydney to Sky Harbor Intl flights
Sydney to Orlando flights
Sydney to Boston flights
Sydney to Miami flights
Sydney to Baltimore flights
Sydney to Dulles Intl flights
Sydney to O'Hare Intl flights
Sydney to San Jose flights
Sydney to Reagan-National flights
Sydney to Denver flights
Sydney to Atlanta flights
Sydney to Salt Lake City flights
Sydney to Kahului flights
Sydney to Fort Lauderdale flights
Sydney to Portland flights
Sydney to Santa Ana flights
Sydney to Tampa flights
Sydney to Philadelphia flights
Sydney to El Paso flights
Sydney to Minneapolis flights
Sydney to Burbank flights
Sydney to Nashville flights
Sydney to Austin flights
Sydney to Kailua-Kona flights
Sydney to Raleigh flights
Sydney to Lihue flights
Sydney to Midway flights
Coolangatta to San Francisco flights
Sydney to San Diego flights
Sydney to Detroit flights
Sydney to Columbus flights
Sydney to Indianapolis flights
Sydney to Colorado Springs flights
Sydney to Oakland flights

Top 6 airlines flying from Sydney to Illinois

Discover the top 6 airlines that operate flights from Sydney to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 13 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,006Average$1,146FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,193Average$1,243FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$1,196Average$1,740FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,523Average$1,612FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
ANACheapest$1,607Average$1,735FlexibilityNo cancel feeOn-time80%
Search ANA flights
United AirlinesCheapest$1,660Average$2,351FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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?

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.