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Cheap flights from Sydney to Illinois from $697

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
5 Feb — 12 Feb1
1 adult

Cheap flight deals from Sydney to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 31 January 2025.

Round-trip from

$1,122

One-way from

$909

Popular in

December

Cheapest in

February

Average price

$1,920
Qantas Airways
  • Qantas Airways
  • 2/3-12/3
  • 2 total stops
  • 46h 52m total
  • Sydney to Illinois
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13/2
  • 13/2
  • 2 total stops
  • 38h 28m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($348 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($94 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 31 January 2025.

Sun 2/311:15SYD - ORD
1 stop23h 02mQantas Airways
Wed 12/317:10ORD - SYD
1 stop23h 50mQantas Airways
Deal found 29/1$1,122
Tue 11/317:25SYD - ORD
1 stop22h 34mMultiple Airlines
Tue 18/319:17ORD - SYD
1 stop21h 43mMultiple Airlines
Deal found 30/1$1,204
Mon 12/509:20SYD - STL
2 stops42h 16mAir Canada
Sat 31/513:30STL - SYD
2 stops50h 50mAir Canada
Deal found 30/1$1,768
Fri 31/111:20SYD - ORD
1 stop22h 18mAir Canada
Tue 4/209:50ORD - SYD
2 stops30h 45mAir Canada
Deal found 30/1$1,777
Wed 7/520:55SYD - ORD
1 stop26h 45mANA
Sun 25/507:20ORD - SYD
2 stops59h 05mANA
Deal found 29/1$1,853
Mon 18/809:20SYD - STL
2 stops44h 56mMultiple Airlines
Sat 8/1116:30STL - SYD
2 stops24h 05mMultiple Airlines
Deal found 30/1$1,983
Mon 12/510:20SYD - STL
1 stop21h 49mUnited Airlines
Sat 31/508:25STL - SYD
2 stops55h 30mUnited Airlines
Deal found 31/1$2,095
Wed 7/510:20SYD - ORD
2 stops23h 02mUnited Airlines
Sun 25/516:20ORD - SYD
2 stops23h 40mUnited Airlines
Deal found 29/1$2,097
Wed 7/509:25SYD - MDW
2 stops23h 39mDelta
Sun 25/513:00MDW - SYD
2 stops26h 35mDelta
Deal found 29/1$2,111
Mon 31/310:10SYD - STL
1 stop28h 59mQantas Airways
Mon 30/606:29STL - SYD
1 stop33h 36mQantas Airways
Deal found 29/1$2,238
Mon 31/310:10SYD - STL
2 stops25h 20mAmerican Airlines
Mon 30/606:29STL - SYD
1 stop33h 36mAmerican Airlines
Deal found 29/1$2,251
Sat 28/609:10SYD - ORD
2 stops23h 10mAmerican Airlines
Fri 11/717:40ORD - SYD
2 stops22h 25mAmerican Airlines
Deal found 30/1$2,378

Find flights from Sydney to Illinois within your budget

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 31 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 2/3

11:15-17:17

1 stop23h 02m

Chicago O'Hare Intl

Wed 12/3

17:10-09:00

1 stop23h 50m

$1,122

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 11/3

17:25-23:59

1 stop22h 34m

Chicago O'Hare Intl

Tue 18/3

19:17-09:00

1 stop21h 43m

$1,204

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

09:20-12:36

2 stops42h 16m

Lambert-St Louis

Sat 31/5

13:30-07:20

2 stops50h 50m

$1,768

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 15/4

09:20-13:11

2 stops42h 51m

Chicago O'Hare Intl

Mon 28/4

15:40-07:20

1 stop24h 40m

$1,848

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 7/5

20:55-08:40

1 stop26h 45m

Chicago O'Hare Intl

Sun 25/5

07:20-09:25

2 stops59h 05m

$1,853

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

10:20-17:09

1 stop21h 49m

Lambert-St Louis

Sat 31/5

08:25-06:55

2 stops55h 30m

$2,095

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 7/5

10:20-18:22

2 stops23h 02m

Chicago O'Hare Intl

Sun 25/5

16:20-07:00

2 stops23h 40m

$2,097

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Wed 7/5

09:25-18:04

2 stops23h 39m

Chicago Midway

Sun 25/5

13:00-06:35

2 stops26h 35m

$2,111

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 31/3

10:10-23:09

1 stop28h 59m

Lambert-St Louis

Mon 30/6

06:29-07:05

1 stop33h 36m

$2,238

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 31/3

10:10-19:30

2 stops25h 20m

Lambert-St Louis

Mon 30/6

06:29-07:05

1 stop33h 36m

$2,251

Flights are sorted by cheapest return flights first.

Deals found on 30/1

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.

Travel insights for flights from Sydney to Illinois

Get recent, data-driven insights about flights from Sydney to Illinois including ideal travel times, pricing trends, and more.

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 31 January 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 31 January 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 ANA. 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

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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.

Korean Air
8.5
Very Good
1,034 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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
8,454 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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.

Finnair
7.6
Good
1,285 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Overall

8.7

Crew

9.1

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

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 Cathay Pacific, with whom users have recently found tickets for as low as $1,500. However, be on the lookout for offers from Air Tahiti Nui and China Southern, 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 31 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,095Average$1,853FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air New ZealandCheapest$1,443Average$1,809FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,543Average$1,764FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$1,554Average$1,969FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
ANACheapest$1,573Average$2,156FlexibilityNo cancel feeOn-time80%
Search ANA flights
United AirlinesCheapest$1,584Average$2,511FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,782Average$2,778FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
DeltaCheapest$1,877Average$2,012FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Cathay PacificCheapest$1,926Average$2,293FlexibilityNo 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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