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Cheap flights from Sydney to Illinois from $873

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
1 Feb — 8 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Sydney to Illinois

Enter your travel dates to find the best prices.

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 2 January 2026.

Mon 19/116:00SYD - ORD
2 stops42h 03mAir Canada
Tue 3/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,544
Mon 19/114:15SYD - MDW
2 stops25h 07mDelta
Mon 2/213:26MDW - SYD
2 stops26h 04mDelta
Deal found 31/12$1,567
Sun 3/511:55SYD - ORD
2 stops24h 13mAir New Zealand
Wed 6/516:00ORD - SYD
2 stops25h 45mAir New Zealand
Deal found 30/12$1,688
Mon 19/111:20SYD - ORD
1 stop20h 30mUnited Airlines
Mon 2/218:29ORD - SYD
1 stop21h 46mUnited Airlines
Deal found 30/12$1,741
Sun 15/217:30SYD - STL
2 stops23h 29mMultiple Airlines
Sun 22/216:13STL - SYD
1 stop21h 42mMultiple Airlines
Deal found 31/12$1,897
Sun 15/211:20SYD - STL
1 stop29h 39mAmerican Airlines
Sun 22/206:38STL - SYD
1 stop33h 22mAmerican Airlines
Deal found 31/12$2,031
Thu 19/206:05SYD - STL
2 stops26h 23mQantas Airways
Mon 23/206:38STL - SYD
1 stop33h 22mQantas Airways
Deal found 1/1$2,237
Mon 19/116:00SYD - ORD
2 stops39h 55mAir Canada
Mon 2/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,579
Sat 14/211:45SYD - ORD
2 stops34h 16mAir New Zealand
Sat 21/209:00ORD - SYD
2 stops30h 45mAir New Zealand
Deal found 31/12$1,757
Wed 4/311:20SYD - ORD
1 stop20h 21mAir Canada
Wed 25/307:25ORD - SYD
2 stops33h 10mAir Canada
Deal found 31/12$1,646
Wed 18/211:20SYD - ORD
1 stop20h 21mAir Canada
Sun 22/220:40ORD - SYD
2 stops43h 55mAir Canada
Deal found 29/12$1,687
Wed 17/609:15SYD - MDW
2 stops24h 16mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sat 16/511:55SYD - ORD
2 stops24h 36mAir New Zealand
Sat 6/616:40ORD - SYD
2 stops25h 05mAir New Zealand
Deal found 30/12$1,997
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Wed 1/709:30MDW - SYD
2 stops30h 05mDelta
Deal found 1/1$2,075
Thu 19/211:20SYD - STL
2 stops26h 06mAir Canada
Mon 23/216:30STL - SYD
2 stops24h 05mAir Canada
Deal found 1/1$1,760
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sun 15/211:20SYD - STL
2 stops26h 06mAir Canada
Sun 22/218:00STL - SYD
2 stops46h 35mAir Canada
Deal found 31/12$1,769
Tue 16/609:15SYD - MDW
2 stops24h 16mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sat 14/211:20SYD - ORD
1 stop20h 21mAir Canada
Sat 21/207:25ORD - SYD
2 stops33h 10mAir Canada
Deal found 31/12$1,796
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Sun 28/609:20MDW - SYD
2 stops30h 15mDelta
Deal found 1/1$2,100
Mon 26/111:20SYD - ORD
1 stop20h 21mAir Canada
Thu 29/115:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,879
Sat 6/609:15SYD - MDW
2 stops24h 16mDelta
Mon 17/813:00MDW - SYD
2 stops26h 35mDelta
Deal found 1/1$2,150
Fri 12/609:15SYD - MDW
2 stops24h 16mDelta
Sun 12/714:00MDW - SYD
2 stops25h 35mDelta
Deal found 31/12$2,150

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 2 January 2026.

Round-trip from

$1,524

One-way from

$873

Popular in

December

Cheapest in

March

Average price

$1,633
Air Canada
  • Air Canada
  • 5/2-18/2
  • 4 total stops
  • 53h 18m total
  • Sydney to Illinois
Search Deals
18/2
  • 18/2
  • 3 total stops
  • 52h 26m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($526 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($83 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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 2 January 2026.
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 19/1

16:00-17:03

2 stops42h 03m

Chicago O'Hare Intl

Tue 3/2

15:35-09:35

1 stop25h 00m

$1,544

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 19/1

14:15-22:22

2 stops25h 07m

Chicago Midway

Mon 2/2

13:26-08:30

2 stops26h 04m

$1,567

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

16:00-14:55

2 stops39h 55m

Chicago O'Hare Intl

Mon 2/2

15:35-09:35

1 stop25h 00m

$1,579

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 4/3

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Wed 25/3

07:25-08:35

2 stops33h 10m

$1,646

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 18/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Sun 22/2

20:40-09:35

2 stops43h 55m

$1,687

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 3/5

11:55-21:08

2 stops24h 13m

Chicago O'Hare Intl

Wed 6/5

16:00-08:45

2 stops25h 45m

$1,688

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

11:20-14:50

1 stop20h 30m

Chicago O'Hare Intl

Mon 2/2

18:29-09:15

1 stop21h 46m

$1,741

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 14/2

11:45-05:01

2 stops34h 16m

Chicago O'Hare Intl

Sat 21/2

09:00-08:45

2 stops30h 45m

$1,757

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

Mon 23/2

16:30-09:35

2 stops24h 05m

$1,760

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 15/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

Sun 22/2

18:00-09:35

2 stops46h 35m

$1,769

Flights are sorted by cheapest return flights first.

Deals found on 1/1

Showing 1-10 of 53 results
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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 $929). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,537). 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.

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 2 January 2026.
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
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air New Zealand
8.0
Very Good
563 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Qantas Airways
7.5
Good
960 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
United Airlines
7.4
Good
9,132 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
American Airlines
7.2
Good
11,072 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air Canada
7.1
Good
10,571 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………

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 25h 07m. 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 $929). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,537). 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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Alternative routes for Sydney to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Sydney to Illinois

Discover the top 7 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 2 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$982Average$1,117FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,168Average$1,217FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$1,171Average$1,628FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,417Average$1,583FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,481Average$2,279FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
ANACheapest$1,574Average$1,703FlexibilityNo cancel feeOn-time80%
Search ANA flights
Virgin AustraliaCheapest$1,726Average$2,799FlexibilityNo cancel feeOn-time80%
Search Virgin Australia 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!

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