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Cheap flights from Sydney to Illinois from $729

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
8 Jul — 15 Jul1
1 adult

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 3 July 2025.

Round-trip from

$1,412

One-way from

$729

Popular in

December

Cheapest in

March

Average price

$1,606
15/8-22/8
  • 15/8-22/8
  • 4 total stops
  • 69h 05m total
  • Sydney to Illinois
Search Deals
15/8
  • 15/8
  • 2 total stops
  • 31h 25m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($554 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($117 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 3 July 2025.

Thu 14/813:15SYD - ORD
2 stops31h 25mMultiple Airlines
Thu 21/807:05ORD - SYD
2 stops38h 10mMultiple Airlines
Deal found 30/6$1,342
Mon 4/809:55SYD - ORD
2 stops28h 04mAir New Zealand
Sat 9/816:50ORD - SYD
2 stops24h 55mAir New Zealand
Deal found 30/6$1,609
Mon 18/817:45SYD - STL
2 stops45h 31mAmerican Airlines
Sat 8/1109:39STL - SYD
1 stop28h 16mAmerican Airlines
Deal found 2/7$1,663
Fri 8/809:10SYD - ORD
1 stop35h 02mAmerican Airlines
Thu 28/806:45ORD - SYD
1 stop32h 20mAmerican Airlines
Deal found 2/7$1,699
Mon 18/810:20SYD - STL
1 stop21h 25mUnited Airlines
Sat 8/1106:15STL - SYD
1 stop31h 45mUnited Airlines
Deal found 1/7$1,725
Fri 15/809:55SYD - STL
2 stops27h 26mAir New Zealand
Fri 22/811:05STL - SYD
2 stops30h 40mAir New Zealand
Deal found 1/7$1,748
Thu 31/709:20SYD - STL
2 stops27h 30mAir Canada
Thu 7/813:30STL - SYD
2 stops26h 50mAir Canada
Deal found 1/7$1,809
Sat 16/809:10SYD - STL
1 stop28h 59mQantas Airways
Sat 23/806:45STL - SYD
1 stop33h 20mQantas Airways
Deal found 2/7$1,935
Thu 31/709:20SYD - STL
2 stops27h 30mMultiple Airlines
Thu 7/806:45STL - SYD
1 stop33h 20mMultiple Airlines
Deal found 1/7$1,985
Tue 9/909:25SYD - MDW
2 stops23h 12mDelta
Tue 16/913:08MDW - SYD
2 stops26h 27mDelta
Deal found 1/7$2,086
Wed 30/709:25SYD - STL
2 stops29h 28mDelta
Wed 6/813:29STL - SYD
2 stops26h 06mDelta
Deal found 2/7$2,142
Tue 23/920:55SYD - STL
3 stops56h 32mTurkish Airlines
Sun 5/1015:23STL - SYD
3 stops36h 37mTurkish Airlines
Deal found 1/7$3,094

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 3 July 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

Thu 14/8

13:15-05:40

2 stops31h 25m

Chicago O'Hare Intl

Thu 21/8

07:05-12:15

2 stops38h 10m

$1,342

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 4/8

09:55-22:59

2 stops28h 04m

Chicago O'Hare Intl

Sat 9/8

16:50-08:45

2 stops24h 55m

$1,609

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

17:45-00:16

2 stops45h 31m

Lambert-St Louis

Sat 8/11

09:39-06:55

1 stop28h 16m

$1,663

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 8/8

09:10-05:12

1 stop35h 02m

Chicago O'Hare Intl

Thu 28/8

06:45-06:05

1 stop32h 20m

$1,699

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

10:20-16:45

1 stop21h 25m

Lambert-St Louis

Sat 8/11

06:15-07:00

1 stop31h 45m

$1,725

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 15/8

09:55-22:21

2 stops27h 26m

Lambert-St Louis

Fri 22/8

11:05-08:45

2 stops30h 40m

$1,748

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 31/7

09:20-21:50

2 stops27h 30m

Lambert-St Louis

Thu 7/8

13:30-07:20

2 stops26h 50m

$1,809

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 16/8

09:10-23:09

1 stop28h 59m

Lambert-St Louis

Sat 23/8

06:45-07:05

1 stop33h 20m

$1,935

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 31/7

09:20-21:50

2 stops27h 30m

Lambert-St Louis

Thu 7/8

06:45-07:05

1 stop33h 20m

$1,985

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 9/9

09:25-17:37

2 stops23h 12m

Chicago Midway

Tue 16/9

13:08-06:35

2 stops26h 27m

$2,086

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Showing 1-10 of 26 results
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2
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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 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 3 July 2025.

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

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 3 July 2025.
Read through reviews of airlines operating flights from Sydney to Illinois, such as Air Tahiti Nui, ANA, andJapan Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very Good
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.4
Very Good
893 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very Good
1,505 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very Good
7,983 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very Good
486 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Entertainment

7.3

Overall

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $1,066. However, be on the lookout for offers from Delta and Alaska Airlines, 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

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Alternative routes for Sydney to Illinois

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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 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,006Average$1,237FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,186Average$1,339FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$1,265Average$1,701FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,550Average$1,598FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
ANACheapest$1,597Average$1,766FlexibilityNo cancel feeOn-time80%
Search ANA flights
United AirlinesCheapest$1,680Average$2,425FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,753Average$2,772FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights

Fly with Cheapflights

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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.

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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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