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$446+ Cheap flights from Sydney (SYD) to Illinois

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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$711
(BestPriceTravel)

One-way from

$446
(Cheapflightsfares)

Popular in

December

Cheapest in

February

Average price

$857
Provider with most accurate pricing for Sydney Kingsford Smith-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Chicago (CHI) flights.
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From Sydney Kingsford Smith to Illinois
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One-way flight from Sydney Kingsford Smith to Illinois
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Highest demand for flights based on searches. 11% potential increase in price ($141 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 20, 2025.

This BestPriceTravel deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/311:15 amSYD - ORD
1 stop21h 35mQantas Airways
Sat 8/1611:50 amORD - SYD
1 stop28h 15mQantas Airways
Deal found 2/19$711
This American Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2811:15 amSYD - ORD
2 stops26h 27mAmerican Airlines
Thu 3/138:20 pmORD - SYD
1 stop20h 40mAmerican Airlines
Deal found 2/19$760
This BestPriceTravel deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:20 amSYD - ORD
2 stops24h 41mMultiple Airlines
Fri 3/148:20 pmORD - SYD
1 stop20h 40mMultiple Airlines
Deal found 2/20$828
This Jettzy deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:20 amSYD - ORD
1 stop20h 29mAir Canada
Sun 9/218:25 pmORD - SYD
2 stops43h 55mAir Canada
Deal found 2/20$996
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/79:30 amSYD - ORD
1 stop25h 55mUnited Airlines
Tue 5/202:35 pmORD - SYD
2 stops25h 20mUnited Airlines
Deal found 2/20$1,095
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:30 amSYD - STL
2 stops42h 15mUnited Airlines
Sat 5/318:25 amSTL - SYD
2 stops55h 35mUnited Airlines
Deal found 2/20$1,097
This Air Canada deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:20 amSYD - STL
2 stops42h 16mAir Canada
Sat 5/311:30 pmSTL - SYD
2 stops50h 50mAir Canada
Deal found 2/20$1,109
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:05 amSYD - MDW
2 stops24h 23mDelta
Wed 11/51:05 pmMDW - SYD
2 stops26h 30mDelta
Deal found 2/20$1,339
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/79:25 amSYD - ORD
2 stops24h 35mDelta
Tue 5/201:35 pmORD - SYD
2 stops26h 00mDelta
Deal found 2/20$1,339
This Globehunters deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/288:55 amSYD - ORD
1 stop39h 20mJapan Airlines
Sat 9/201:05 amORD - SYD
1 stop38h 15mJapan Airlines
Deal found 2/20$1,346
This BestPriceTravel deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/111:15 amSYD - ORD
2 stops46h 35mFinnair
Thu 5/89:30 pmORD - SYD
2 stops40h 40mFinnair
Deal found 2/20$1,377
This Gotogate deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/39:55 pmSYD - ORD
2 stops36h 00mTurkish Airlines
Sun 4/2011:25 amORD - SYD
2 stops40h 35mTurkish Airlines
Deal found 2/20$1,511

Find flights from Sydney to Illinois within your budget

Customize 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 2,558,603 searches. Data last updated February 20, 2025.

Fly from

Sydney

Fly to

Illinois

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 3/3

11:15 am-3:50 pm

1 stop21h 35m

Chicago O'Hare Intl

Sat 8/16

11:50 am-7:05 am

1 stop28h 15m

$711

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 3/6

6:20 am-2:01 pm

2 stops24h 41m

Chicago O'Hare Intl

Fri 3/14

8:20 pm-9:00 am

1 stop20h 40m

$828

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 3/6

11:50 am-4:19 pm

2 stops21h 29m

Chicago O'Hare Intl

Thu 3/13

8:20 pm-9:00 am

1 stop20h 40m

$973

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 5/6

9:20 am-4:48 pm

2 stops46h 28m

Chicago O'Hare Intl

Tue 5/20

10:00 am-7:20 am

2 stops30h 20m

$1,005

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 5/7

9:30 am-8:25 pm

1 stop25h 55m

Chicago O'Hare Intl

Tue 5/20

2:35 pm-6:55 am

2 stops25h 20m

$1,095

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

9:30 am-12:45 pm

2 stops42h 15m

Lambert-St Louis

Sat 5/31

8:25 am-7:00 am

2 stops55h 35m

$1,097

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

9:20 am-12:36 pm

2 stops42h 16m

Lambert-St Louis

Sat 5/31

1:30 pm-7:20 am

2 stops50h 50m

$1,109

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 5/7

9:25 am-7:00 pm

2 stops24h 35m

Chicago O'Hare Intl

Tue 5/20

1:35 pm-6:35 am

2 stops26h 00m

$1,339

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 4/1

11:15 am-5:50 pm

2 stops46h 35m

Chicago O'Hare Intl

Thu 5/8

9:30 pm-5:10 am

2 stops40h 40m

$1,377

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Sun 4/20

9:25 am-6:20 pm

2 stops23h 55m

Chicago Midway

Thu 5/8

9:20 am-6:35 am

2 stops30h 15m

$1,434

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 37 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 round-trip 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 month to book a flight from Sydney to Illinois?

Currently, August is the cheapest month in which you can book a flight from Sydney to Illinois (average of $245). Flying from Sydney to Illinois in March is currently the most expensive (average of $321). 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.

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 February 20, 2025.

When flying from Sydney to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 February 20, 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, Korean Air and ANA from Sydney to Illinois to help guide your decision. 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
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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
1,037 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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.

ANA
8.4
Very good
842 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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.

Fiji Airways
8.0
Very good
185 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Comfort

8.0

Entertainment

7.2

Food

7.8

Overall

8.7

Crew

9.1

Boarding

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?

    Sydney Kingsford Smith (SYD), located 4.6 mi from the city center, is the airport you fly out of when you book flights from Sydney to Illinois.

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

    $446 is the cheapest one-way deal found within the past few days, from Qantas Airways. You may also be able to find cheap deals on American Airlines and Cathay Pacific, with prices starting from $479 and $858, respectively.

  • What are the most popular routes from Sydney to Illinois?

    The most popular flight routes from Sydney to Illinois are Sydney Kingsford Smith - Chicago O'Hare Intl, Sydney Kingsford Smith - Chicago Midway and 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 vacation 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, August is the cheapest month in which you can book a flight from Sydney to Illinois (average of $245). Flying from Sydney to Illinois in March is currently the most expensive (average of $321). 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.

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Top 3 airlines flying from Sydney to Illinois

Discover the top 3 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 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$886FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,296FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$964Average$1,593FlexibilityNo cancel feeOn-time69%
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