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$448+ 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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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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 January 21, 2025.

Round-trip from

$706
(BestPriceTravel)

One-way from

$448
(Cheapflightsfares)
From Sydney Kingsford Smith to Illinois
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One-way flight from Sydney Kingsford Smith to Illinois
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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 January 21, 2025.

This BestPriceTravel deal was found by Cheapflights users on 1/21. 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
Fri 3/148:20 pmORD - SYD
1 stop20h 40mQantas Airways
Deal found 1/21$706
This Bravofly deal was found by Cheapflights users on 1/20. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/285:35 pmSYD - ORD
1 stop37h 20mMultiple Airlines
Thu 8/217:15 amORD - SYD
2 stops45h 00mMultiple Airlines
Deal found 1/20$850
This Air Canada deal was found by Cheapflights users on 1/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/511:20 amSYD - STL
2 stops44h 46mAir Canada
Wed 3/123:50 pmSTL - SYD
2 stops48h 45mAir Canada
Deal found 1/19$1,053
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Wed 4/99:20 amSYD - STL
2 stops44h 39mMultiple Airlines
Wed 4/161:43 pmSTL - SYD
2 stops26h 37mMultiple Airlines
Deal found 1/20$1,122
This American Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 3/511:15 amSYD - STL
2 stops22h 06mAmerican Airlines
Wed 3/126:15 amSTL - SYD
1 stop34h 45mAmerican Airlines
Deal found 1/19$1,135
This BYOjet deal was found by Cheapflights users on 1/21. 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.
Thu 4/249:20 amSYD - ORD
1 stop20h 19mAir Canada
Mon 5/53:45 pmORD - SYD
2 stops24h 35mAir Canada
Deal found 1/21$1,153
This Globehunters deal was found by Cheapflights users on 1/21. 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.
Mon 11/2412:25 pmSYD - ORD
1 stop35h 55mANA
Fri 12/127:15 amORD - SYD
2 stops44h 00mANA
Deal found 1/21$1,157
This Aunt Betty deal was found by Cheapflights users on 1/20. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1311:15 amSYD - STL
1 stop27h 54mQantas Airways
Thu 3/206:15 amSTL - SYD
1 stop34h 45mQantas Airways
Deal found 1/20$1,168
This Delta deal was found by Cheapflights users on 1/20. 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.
Mon 3/2410:05 amSYD - MDW
2 stops23h 57mDelta
Mon 3/3112:51 pmMDW - SYD
2 stops26h 44mDelta
Deal found 1/20$1,183
This BYOjet deal was found by Cheapflights users on 1/20. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/288:15 amSYD - ORD
2 stops31h 03mJapan Airlines
Thu 8/218:10 amORD - SYD
2 stops31h 00mJapan Airlines
Deal found 1/20$1,186
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Thu 1/2311:15 amSYD - ORD
2 stops22h 20mAmerican Airlines
Fri 1/315:35 pmORD - SYD
2 stops22h 25mAmerican Airlines
Deal found 1/21$1,195
This Delta deal was found by Cheapflights users on 1/20. 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.
Mon 7/289:25 amSYD - ORD
2 stops24h 38mDelta
Fri 8/81:16 pmORD - SYD
2 stops26h 19mDelta
Deal found 1/20$1,230

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

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

Fri 3/14

8:20 pm-9:00 am

1 stop20h 40m

$706

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/10

2:00 pm-11:13 pm

2 stops26h 13m

Chicago O'Hare Intl

Mon 2/17

11:35 am-12:30 pm

2 stops31h 55m

$936

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/5

11:20 am-3:06 pm

2 stops44h 46m

Lambert-St Louis

Wed 3/12

3:50 pm-8:35 am

2 stops48h 45m

$1,053

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 4/9

9:20 am-2:59 pm

2 stops44h 39m

Lambert-St Louis

Wed 4/16

1:43 pm-7:20 am

2 stops26h 37m

$1,122

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/5

11:15 am-11:08 pm

1 stop28h 53m

Lambert-St Louis

Wed 3/12

6:15 am-9:00 am

1 stop34h 45m

$1,135

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 4/24

9:20 am-2:39 pm

1 stop20h 19m

Chicago O'Hare Intl

Mon 5/5

3:45 pm-7:20 am

2 stops24h 35m

$1,153

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/13

11:15 am-11:09 pm

1 stop27h 54m

Lambert-St Louis

Thu 3/20

6:15 am-9:00 am

1 stop34h 45m

$1,168

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 3/24

10:05 am-6:02 pm

2 stops23h 57m

Chicago Midway

Mon 3/31

12:51 pm-7:35 am

2 stops26h 44m

$1,183

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/9

11:50 am-7:54 pm

1 stop25h 04m

Lambert-St Louis

Fri 3/14

8:40 am-7:00 am

1 stop30h 20m

$1,243

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 6/28

11:50 am-7:16 pm

2 stops46h 26m

Chicago O'Hare Intl

Thu 7/17

5:45 pm-7:15 pm

1 stop34h 30m

$1,596

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 32 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 $320). 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 January 21, 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 January 21, 2025.
Peruse reviews from past customers who have flown with Qantas Airways and Air Canada 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

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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
1,039 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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
852 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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
1,449 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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.

Singapore Airlines
8.1
Very good
1,328 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Food

7.8

Overall

8.8

Entertainment

7.3

Crew

9.1

Boarding

8.7

Reviews

1 / 2

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?

    $448 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 United Airlines and Delta, with prices starting from $822 and $827, 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 $320). 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 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$737Average$1,230FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$884Average$1,296FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$964Average$1,593FlexibilityNo cancel feeOn-time69%
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