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Cheap flights from Sydney to Illinois from $832

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 27/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
13 fev — 20 fev1
1 adult
1 adult, Economy, 0 bags

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 14 janeiro 2026.

Round-trip from

$1,503

One-way from

$832

Popular in

December

Cheapest in

February

Average price

$1,479
Air New Zealand
  • Air New Zealand
  • 1/2-16/2
  • 4 total stops
  • 56h 54m total
  • Sydney to Illinois
Search Deals
27/2
  • 27/2
  • 3 total stops
  • 34h 54m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($456 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($79 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 14 janeiro 2026.

dom 1/209:55
SYD
-
ORD
2 stops30h 04m
Air New Zealand
seg 16/212:55
ORD
-
SYD
2 stops26h 50m
Air New Zealand
Deal found 12/1$1,503
qui 29/111:20
SYD
-
ORD
2 stops37h 45m
Air Canada
qua 11/215:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 12/1$1,523
qui 26/211:20
SYD
-
ORD
1 stop22h 18m
Air Canada
qui 5/315:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 12/1$1,565
seg 20/411:55
SYD
-
ORD
2 stops26h 33m
Air New Zealand
seg 27/415:45
ORD
-
SYD
2 stops26h 00m
Air New Zealand
Deal found 13/1$1,577
seg 2/211:20
SYD
-
ORD
1 stop20h 21m
Air Canada
ter 17/207:15
ORD
-
SYD
2 stops33h 20m
Air Canada
Deal found 13/1$1,580
qua 18/211:20
SYD
-
ORD
2 stops22h 25m
Air Canada
dom 1/320:40
ORD
-
SYD
2 stops43h 55m
Air Canada
Deal found 12/1$1,590
ter 3/311:20
SYD
-
STL
2 stops45h 09m
Multiple Airlines
seg 13/414:40
STL
-
SYD
2 stops25h 40m
Multiple Airlines
Deal found 11/1$1,644
qui 12/310:25
SYD
-
STL
2 stops26h 16m
Air Canada
seg 16/305:15
STL
-
SYD
2 stops35h 20m
Air Canada
Deal found 11/1$1,729
qui 19/211:20
SYD
-
STL
2 stops26h 06m
Air Canada
seg 23/216:30
STL
-
SYD
2 stops24h 05m
Air Canada
Deal found 13/1$1,730
ter 3/311:20
SYD
-
STL
1 stop29h 39m
American Airlines
seg 13/414:37
STL
-
SYD
2 stops25h 28m
American Airlines
Deal found 11/1$1,732
ter 3/314:00
SYD
-
STL
3 stops25h 14m
United Airlines
seg 13/416:49
STL
-
SYD
2 stops23h 11m
United Airlines
Deal found 11/1$1,757
qui 19/211:50
SYD
-
STL
1 stop20h 48m
United Airlines
seg 23/216:28
STL
-
SYD
1 stop21h 32m
United Airlines
Deal found 13/1$1,760

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 14 janeiro 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

qui 29/1

11:20-08:05

2 stops37h 45m

Chicago O'Hare Intl

qua 11/2

15:35-09:35

1 stop25h 00m

$1,523

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

qui 26/2

11:20-16:45

2 stops22h 25m

Chicago O'Hare Intl

qui 5/3

15:35-09:35

1 stop25h 00m

$1,565

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

ter 3/3

11:20-15:29

2 stops45h 09m

Lambert-St Louis

seg 13/4

14:40-07:20

2 stops25h 40m

$1,644

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

qua 18/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

dom 22/2

20:40-09:35

2 stops43h 55m

$1,683

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

qui 12/3

10:25-20:41

2 stops26h 16m

Lambert-St Louis

seg 16/3

05:15-08:35

2 stops35h 20m

$1,729

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

qui 19/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

seg 23/2

16:30-09:35

2 stops24h 05m

$1,730

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

qui 12/3

11:20-19:29

2 stops24h 09m

Lambert-St Louis

seg 16/3

06:38-09:00

1 stop34h 22m

$1,732

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

ter 3/3

11:20-23:59

1 stop29h 39m

Lambert-St Louis

seg 13/4

14:37-07:05

2 stops25h 28m

$1,732

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

qui 19/2

11:20-17:13

2 stops22h 53m

Lambert-St Louis

seg 23/2

06:38-09:00

1 stop33h 22m

$1,735

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

qua 18/2

10:40-17:45

2 stops24h 05m

Chicago Midway

dom 1/3

12:45-06:50

2 stops25h 05m

$2,375

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 46 results
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2
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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 $926). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,544). 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 14 janeiro 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
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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
570 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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
971 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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
9,157 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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
11,124 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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
10,620 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Entertainment

7.4

Food

7.4

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

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 24h 05m. 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 $926). Flying from Sydney to Illinois in December is currently the most expensive (average of $1,544). 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 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 14 janeiro 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$978Average$1,118FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,164Average$1,213FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$1,167Average$1,622FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,413Average$1,577FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,476Average$2,229FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
ANACheapest$1,568Average$1,692FlexibilityNo cancel feeOn-time80%
Search ANA 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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