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$450+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
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 abril 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$914
(Trip.com)

One-way from

$450
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$841
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. 16% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 17, 2025.

This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/81:15 pmSYD - ORD
2 stops33h 30mMultiple Airlines
jue. 5/157:00 amORD - SYD
2 stops38h 15mMultiple Airlines
Deal found 4/16$914
This Trip.com deal was found by Cheapflights users on 4/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/1412:50 pmSYD - ORD
1 stop42h 05mANA
vie. 10/247:10 amORD - SYD
2 stops45h 05mANA
Deal found 4/17$1,206
This BYOjet deal was found by Cheapflights users on 4/17. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1111:15 amSYD - ORD
1 stop21h 37mQantas Airways
mié. 11/193:24 pmORD - SYD
2 stops25h 26mQantas Airways
Deal found 4/17$1,220
This Gotogate deal was found by Cheapflights users on 4/17. 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.
mar. 11/1111:20 amSYD - ORD
2 stops22h 16mAir Canada
mié. 11/199:50 amORD - SYD
2 stops30h 45mAir Canada
Deal found 4/17$1,237
This United Airlines deal was found by Cheapflights users on 4/16. 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.
jue. 10/911:20 amSYD - ORD
1 stop21h 48mUnited Airlines
dom. 10/194:35 pmORD - SYD
1 stop23h 25mUnited Airlines
Deal found 4/16$1,330
This United Airlines deal was found by Cheapflights users on 4/17. 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.
lun. 8/1810:20 amSYD - STL
1 stop21h 25mUnited Airlines
sáb. 11/83:15 pmSTL - SYD
2 stops46h 45mUnited Airlines
Deal found 4/17$1,332
This Delta deal was found by Cheapflights users on 4/16. 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.
jue. 10/910:25 amSYD - MDW
2 stops23h 42mDelta
mar. 10/212:00 pmMDW - SYD
2 stops25h 35mDelta
Deal found 4/16$1,339
This Gotogate deal was found by Cheapflights users on 4/17. 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.
jue. 5/110:10 amSYD - ORD
1 stop43h 15mCathay Pacific
sáb. 5/314:00 pmORD - SYD
1 stop47h 10mCathay Pacific
Deal found 4/17$1,339
This Delta deal was found by Cheapflights users on 4/17. 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.
lun. 6/169:25 amSYD - ORD
2 stops23h 38mDelta
lun. 7/149:30 amORD - SYD
2 stops30h 05mDelta
Deal found 4/17$1,341
This American Airlines deal was found by Cheapflights users on 4/17. 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.
mar. 6/249:10 amSYD - ORD
2 stops23h 01mAmerican Airlines
mar. 7/295:06 pmORD - SYD
2 stops22h 59mAmerican Airlines
Deal found 4/17$1,412
This BYOjet deal was found by Cheapflights users on 4/17. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/18:55 amSYD - STL
2 stops29h 09mJapan Airlines
dom. 6/86:28 amSTL - SYD
2 stops32h 52mJapan Airlines
Deal found 4/17$1,419
This Trip.com deal was found by Cheapflights users on 4/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/58:55 amSYD - ORD
2 stops49h 34mJapan Airlines
lun. 6/161:30 amORD - SYD
1 stop37h 50mJapan Airlines
Deal found 4/17$1,424

Cheapflights Fare Finder

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 abril 17, 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

jue. 5/8

1:15 pm-7:45 am

2 stops33h 30m

Chicago O'Hare Intl

jue. 5/15

7:00 am-12:15 pm

2 stops38h 15m

$914

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

mar. 10/14

12:50 pm-2:55 pm

1 stop42h 05m

Chicago O'Hare Intl

vie. 10/24

7:10 am-8:15 pm

2 stops45h 05m

$1,206

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

mar. 10/14

10:10 am-7:40 pm

1 stop25h 30m

Chicago O'Hare Intl

vie. 10/24

2:45 pm-9:50 am

2 stops27h 05m

$1,225

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

sáb. 10/11

10:20 am-10:07 pm

2 stops27h 47m

Chicago O'Hare Intl

mar. 10/21

10:00 am-8:20 am

2 stops30h 20m

$1,289

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

jue. 10/9

11:20 am-5:08 pm

1 stop21h 48m

Chicago O'Hare Intl

dom. 10/19

4:35 pm-8:00 am

1 stop23h 25m

$1,330

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

10:20 am-4:45 pm

1 stop21h 25m

Lambert-St Louis

sáb. 11/8

3:15 pm-7:00 am

2 stops46h 45m

$1,332

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

jue. 10/9

10:25 am-6:07 pm

2 stops23h 42m

Chicago Midway

mar. 10/21

2:00 pm-7:35 am

2 stops25h 35m

$1,339

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

jue. 5/1

10:10 am-2:25 pm

1 stop43h 15m

Chicago O'Hare Intl

sáb. 5/31

4:00 pm-6:10 am

1 stop47h 10m

$1,339

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

lun. 6/16

9:25 am-6:03 pm

2 stops23h 38m

Chicago O'Hare Intl

lun. 7/14

9:30 am-6:35 am

2 stops30h 05m

$1,341

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

mar. 6/24

9:10 am-5:11 pm

2 stops23h 01m

Chicago O'Hare Intl

mar. 7/29

5:06 pm-7:05 am

2 stops22h 59m

$1,412

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 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.

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, 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 abril 17, 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 abril 17, 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, Japan Airlines 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
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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
8.3
Very good
844 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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
7,917 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Overall

8.8

Boarding

8.7

Entertainment

7.3

Comfort

8.1

Crew

9.1

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?

    $636 is the cheapest one-way deal found within the past few days, from Etihad Airways. You may also be able to find cheap deals on Cathay Pacific and Air Canada, with prices starting from $804 and $842, 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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Alternative routes for Sydney to Illinois

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Top 2 airlines flying from Sydney to Illinois

Discover the top 2 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 abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$762FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,296FlexibilityNo cancel feeOn-time71%

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