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Cheap flights from Sydney to Illinois from $698

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 17 April 2026.

Mon 4/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Fri 8/508:30
ORD
-
SYD
3 stops36h 20m
Multiple Airlines
Deal found 16/4$1,496
Sat 9/513:15
SYD
-
ORD
2 stops31h 44m
Multiple Airlines
Sun 31/507:15
ORD
-
SYD
2 stops37h 35m
Multiple Airlines
Deal found 14/4$1,524
Tue 8/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Fri 11/917:45
ORD
-
SYD
1 stop34h 25m
ANA
Deal found 14/4$1,594
Wed 11/1112:25
SYD
-
ORD
1 stop35h 55m
ANA
Mon 16/1120:00
ORD
-
SYD
2 stops31h 15m
ANA
Deal found 13/4$1,620
Wed 3/617:50
SYD
-
ORD
1 stop27h 14m
Multiple Airlines
Tue 23/621:13
ORD
-
SYD
1 stop43h 17m
Multiple Airlines
Deal found 14/4$1,674
Wed 2/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Fri 11/917:45
ORD
-
SYD
1 stop24h 40m
ANA
Deal found 17/4$1,677
Tue 5/517:50
SYD
-
MDW
2 stops32h 19m
Multiple Airlines
Wed 20/506:00
MDW
-
SYD
2 stops34h 30m
Multiple Airlines
Deal found 15/4$1,697
Tue 19/517:50
SYD
-
ORD
1 stop27h 49m
Multiple Airlines
Tue 26/520:46
ORD
-
SYD
1 stop43h 44m
Multiple Airlines
Deal found 15/4$1,698
Thu 28/517:50
SYD
-
ORD
1 stop27h 44m
Multiple Airlines
Thu 4/609:20
ORD
-
SYD
2 stops35h 30m
Multiple Airlines
Deal found 13/4$1,732
Wed 20/509:20
SYD
-
STL
2 stops26h 23m
Air Canada
Thu 11/616:48
STL
-
SYD
2 stops23h 32m
Air Canada
Deal found 13/4$1,736
Mon 1/617:50
SYD
-
ORD
1 stop27h 14m
Multiple Airlines
Mon 8/621:37
ORD
-
SYD
2 stops42h 53m
Multiple Airlines
Deal found 17/4$1,751
Wed 20/509:20
SYD
-
STL
2 stops26h 05m
Air Canada
Fri 12/616:48
STL
-
SYD
2 stops23h 32m
Air Canada
Deal found 13/4$1,752

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 17 April 2026.

Round-trip from

$1,496

One-way from

$698

Popular in

April

Cheapest in

August

Average price

$2,220
4/5-8/5
  • 4/5-8/5
  • 5 total stops
  • 67h 55m total
  • Sydney to Illinois
Search Deals
4/9
  • 4/9
  • 3 total stops
  • 43h 09m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($198 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($69 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 17 April 2026.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,832

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 16/5

15:40-14:20

2 stops37h 40m

Chicago O'Hare Intl

Sat 6/6

14:00-16:50

1 stop35h 50m

$2,087

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 10/5

15:40-15:21

2 stops38h 41m

Chicago O'Hare Intl

Thu 14/5

14:00-16:50

1 stop35h 50m

$2,087

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 7/5

17:50-12:04

2 stops33h 14m

Chicago O'Hare Intl

Fri 22/5

12:59-07:30

2 stops27h 31m

$2,093

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 29/7

09:15-23:22

2 stops29h 07m

Lambert-St Louis

Tue 11/8

15:50-06:50

2 stops24h 00m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/7

09:15-23:53

2 stops29h 38m

Lambert-St Louis

Tue 11/8

12:10-06:50

2 stops27h 40m

$2,094

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

13:45-07:05

2 stops26h 20m

$2,109

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 25/7

10:20-15:46

2 stops44h 26m

Lambert-St Louis

Sun 9/8

19:23-06:55

1 stop20h 32m

$2,164

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 24/7

10:20-15:46

2 stops44h 26m

Lambert-St Louis

Sat 8/8

19:23-06:55

1 stop20h 32m

$2,235

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 2/6

20:45-13:14

2 stops31h 29m

Chicago O'Hare Intl

Tue 23/6

17:42-18:50

2 stops34h 08m

$2,303

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 49 resultsSorted by cheapest first
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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, December is the cheapest month in which you can book a flight from Sydney to Illinois (average of $652). Flying from Sydney to Illinois in February is currently the most expensive (average of $1,206). 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.

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

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 17 April 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
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air New Zealand
8.0
Very Good
627 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Qantas Airways
7.5
Good
1,019 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
United Airlines
7.4
Good
9,603 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
American Airlines
7.1
Good
11,596 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air Canada
7.1
Good
10,932 reviews
Air New Zealand
8.0
Very Good
627 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Crew

8.5

Food

7.4

Overall

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding

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 26h 05m. 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 United Airlines, with whom users have recently found tickets for as low as $177. However, be on the lookout for offers from Qantas Airways and Air New Zealand, 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.

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

    Currently, December is the cheapest month in which you can book a flight from Sydney to Illinois (average of $652). Flying from Sydney to Illinois in February is currently the most expensive (average of $1,206). 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.

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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,056Average$1,652FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,087Average$1,134FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,230Average$1,634FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air New ZealandCheapest$1,319Average$1,474FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
United AirlinesCheapest$1,379Average$2,085FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
ANACheapest$1,465Average$1,581FlexibilityNo 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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