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Cheap flights from Sydney to Illinois from $840

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
31 Mar — 7 Apr1
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 26 March 2025.

Round-trip from

$1,514

One-way from

$840

Popular in

December

Cheapest in

February

Average price

$1,440
Air Canada
  • Air Canada
  • 21/5-25/5
  • 4 total stops
  • 84h 03m total
  • Sydney to Illinois
Search Deals
Air Canada
  • Air Canada
  • 1/6
  • 1 total stop
  • 35h 18m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($461 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($104 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 26 March 2025.

Wed 30/409:10SYD - ORD
1 stop21h 46mQantas Airways
Sun 18/519:13ORD - SYD
1 stop20h 52mQantas Airways
Deal found 25/3$1,624
Mon 18/809:20SYD - STL
2 stops45h 01mAir Canada
Sat 8/1116:15STL - SYD
2 stops48h 20mAir Canada
Deal found 25/3$1,638
Mon 18/812:10SYD - STL
1 stop18h 58mAmerican Airlines
Sat 8/1106:15STL - SYD
1 stop33h 45mAmerican Airlines
Deal found 25/3$1,652
Mon 5/509:20SYD - ORD
2 stops44h 45mAir Canada
Mon 12/515:35ORD - SYD
1 stop24h 45mAir Canada
Deal found 25/3$1,671
Wed 30/417:45SYD - ORD
2 stops27h 20mMultiple Airlines
Sun 18/509:55ORD - SYD
1 stop30h 10mMultiple Airlines
Deal found 25/3$1,684
Mon 5/509:10SYD - ORD
2 stops21h 37mAmerican Airlines
Mon 12/517:17ORD - SYD
2 stops22h 48mAmerican Airlines
Deal found 25/3$1,721
Tue 22/410:20SYD - ORD
1 stop25h 57mUnited Airlines
Tue 29/415:50ORD - SYD
2 stops24h 05mUnited Airlines
Deal found 25/3$1,722
Mon 12/509:30SYD - STL
2 stops22h 03mUnited Airlines
Sat 31/517:27STL - SYD
2 stops46h 33mUnited Airlines
Deal found 25/3$1,727
Tue 22/409:25SYD - MDW
2 stops22h 54mDelta
Tue 29/412:48MDW - SYD
2 stops26h 47mDelta
Deal found 25/3$1,740
Mon 21/409:25SYD - ORD
2 stops30h 28mDelta
Wed 30/711:19ORD - SYD
2 stops28h 16mDelta
Deal found 25/3$1,741
Mon 12/517:45SYD - STL
1 stop20h 19mMultiple Airlines
Sat 31/515:58STL - SYD
1 stop23h 57mMultiple Airlines
Deal found 25/3$1,776
Fri 9/510:25SYD - STL
1 stop24h 04mQantas Airways
Fri 16/519:19STL - SYD
1 stop20h 36mQantas Airways
Deal found 25/3$1,854

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 26 March 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

Wed 30/4

09:10-15:56

1 stop21h 46m

Chicago O'Hare Intl

Sun 18/5

19:13-07:05

1 stop20h 52m

$1,624

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:20-15:21

2 stops45h 01m

Lambert-St Louis

Sat 8/11

16:15-09:35

2 stops48h 20m

$1,638

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

12:10-16:08

1 stop18h 58m

Lambert-St Louis

Sat 8/11

06:15-09:00

1 stop33h 45m

$1,652

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 5/5

09:20-15:05

2 stops44h 45m

Chicago O'Hare Intl

Mon 12/5

15:35-07:20

1 stop24h 45m

$1,671

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 30/4

17:45-06:05

2 stops27h 20m

Chicago O'Hare Intl

Sun 18/5

09:55-07:05

1 stop30h 10m

$1,684

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 5/5

09:10-15:47

2 stops21h 37m

Chicago O'Hare Intl

Mon 12/5

17:17-07:05

2 stops22h 48m

$1,721

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 22/4

10:20-21:17

1 stop25h 57m

Chicago O'Hare Intl

Tue 29/4

15:50-06:55

2 stops24h 05m

$1,722

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

09:30-16:33

2 stops22h 03m

Lambert-St Louis

Sat 31/5

17:27-07:00

2 stops46h 33m

$1,727

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 22/4

09:25-17:19

2 stops22h 54m

Chicago Midway

Tue 29/4

12:48-06:35

2 stops26h 47m

$1,740

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 21/4

09:25-00:53

2 stops30h 28m

Chicago O'Hare Intl

Wed 30/7

11:19-06:35

2 stops28h 16m

$1,741

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 34 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 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 26 March 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 26 March 2025.
To help decide which airline to fly from Sydney to Illinois, see what other customers have to say about Air Tahiti Nui, Korean Air and Japan Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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.
Korean Air
8.4
Very Good
1,049 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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
1,440 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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
7,891 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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.
Finnair
7.6
Good
1,266 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Crew

9.1

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Food

7.8

Overall

8.7

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 Air Canada, with whom users have recently found tickets for as low as $840. However, be on the lookout for offers from Cathay Pacific and United 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Sydney to Illinois

Discover the top 9 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 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,055Average$1,523FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,411Average$1,821FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
ANACheapest$1,552Average$2,156FlexibilityNo cancel feeOn-time80%
Search ANA flights
American AirlinesCheapest$1,565Average$1,746FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,612Average$2,419FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air New ZealandCheapest$1,628Average$1,964FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Virgin AustraliaCheapest$1,761Average$2,745FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
DeltaCheapest$1,856Average$1,989FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Cathay PacificCheapest$1,904Average$2,267FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific 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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