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$406+ Cheap flights from Illinois to Sydney (SYD)

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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Cheap flight deals from Illinois to Sydney

Keep the following information in mind while searching for Illinois to Sydney flight deals. Data was last updated julio 31, 2025.

Round-trip from

$800
(lol.travel)

One-way from

$406
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,071
From Illinois to Sydney Kingsford Smith
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One-way flight from Illinois to Sydney Kingsford Smith
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Highest demand for flights based on searches. 15% potential increase in price ($181 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Illinois to Sydney

Cheapest flights from Illinois to Sydney
Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This lol.travel deal was found by Cheapflights users on 7/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/243:40 pmORD - SYD
1 stop24h 40mAir Canada
mar. 9/99:20 amSYD - ORD
1 stop20h 40mAir Canada
Deal found 7/30$800
This Air Canada deal was found by Cheapflights users on 7/29. 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.
lun. 12/14:05 pmSTL - SYD
2 stops45h 50mAir Canada
dom. 2/111:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 7/29$899
This Trip.com deal was found by Cheapflights users on 7/30. 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.
lun. 10/206:20 amORD - SYD
2 stops38h 25mMultiple Airlines
dom. 11/22:00 pmSYD - ORD
2 stops25h 59mMultiple Airlines
Deal found 7/30$964
This Air Canada deal was found by Cheapflights users on 7/31. 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.
mié. 10/291:35 pmSTL - SYD
2 stops27h 00mMultiple Airlines
sáb. 11/1511:20 amSYD - STL
2 stops45h 09mMultiple Airlines
Deal found 7/31$969
This lol.travel deal was found by Cheapflights users on 7/31. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/213:20 pmSTL - SYD
2 stops24h 35mUnited Airlines
dom. 10/511:20 amSYD - STL
2 stops25h 26mUnited Airlines
Deal found 7/31$1,083
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/11:20 pmSTL - SYD
1 stop24h 35mQantas Airways
dom. 2/17:20 amSYD - STL
2 stops21h 24mQantas Airways
Deal found 7/29$1,084
This American Airlines deal was found by Cheapflights users on 7/30. 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.
jue. 9/118:50 amSTL - SYD
1 stop31h 05mAmerican Airlines
jue. 9/185:45 pmSYD - STL
1 stop20h 14mAmerican Airlines
Deal found 7/30$1,166
This United Airlines deal was found by Cheapflights users on 7/30. 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.
mar. 8/126:45 amPIA - SYD
2 stops33h 15mUnited Airlines
mar. 9/169:30 amSYD - PIA
2 stops26h 22mUnited Airlines
Deal found 7/30$1,233
This oojo deal was found by Cheapflights users on 7/31. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/286:15 amSTL - SYD
2 stops35h 15mAir New Zealand
dom. 12/1411:45 amSYD - STL
2 stops27h 13mAir New Zealand
Deal found 7/31$1,262
This American Airlines deal was found by Cheapflights users on 7/30. 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. 8/125:09 pmPIA - SYD
1 stop22h 46mAmerican Airlines
mar. 9/1612:10 pmSYD - PIA
1 stop26h 13mAmerican Airlines
Deal found 7/30$1,346
This Delta deal was found by Cheapflights users on 7/31. 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. 10/61:48 pmMDW - SYD
2 stops25h 47mDelta
dom. 10/1910:25 amSYD - MDW
2 stops24h 00mDelta
Deal found 7/31$1,465
This American Airlines deal was found by Cheapflights users on 7/30. 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.
lun. 8/255:46 pmEVV - SYD
1 stop22h 09mAmerican Airlines
lun. 9/112:10 pmSYD - EVV
1 stop19h 55mAmerican Airlines
Deal found 7/30$1,646

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Sydney 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 julio 31, 2025.
Use the filters below to find and compare flights from Illinois to Sydney that are best for you.

Fly from

Illinois

Fly to

Sydney

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 8/24

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

mar. 9/9

9:20 am-3:00 pm

1 stop20h 40m

$800

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

lun. 12/1

4:05 pm-6:55 am

2 stops45h 50m

Sydney Kingsford Smith

dom. 2/1

11:20 am-3:29 pm

2 stops45h 09m

$899

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 10/20

6:20 am-12:45 pm

2 stops38h 25m

Sydney Kingsford Smith

dom. 11/2

2:00 pm-11:59 pm

2 stops25h 59m

$964

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

mié. 10/29

1:35 pm-8:35 am

2 stops27h 00m

Sydney Kingsford Smith

sáb. 11/15

11:20 am-3:29 pm

2 stops45h 09m

$969

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

dom. 9/21

3:20 pm-6:55 am

2 stops24h 35m

Sydney Kingsford Smith

dom. 10/5

11:20 am-8:46 pm

2 stops25h 26m

$1,083

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

lun. 12/1

1:20 pm-6:55 am

1 stop24h 35m

Sydney Kingsford Smith

dom. 2/1

7:20 am-11:44 am

2 stops21h 24m

$1,084

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

jue. 9/11

8:50 am-6:55 am

1 stop31h 05m

Sydney Kingsford Smith

jue. 9/18

5:45 pm-10:59 pm

1 stop20h 14m

$1,166

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

mar. 8/12

6:45 am-7:00 am

2 stops33h 15m

Sydney Kingsford Smith

mar. 9/16

9:30 am-8:52 pm

2 stops26h 22m

$1,233

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

vie. 11/28

6:15 am-10:30 am

2 stops35h 15m

Sydney Kingsford Smith

dom. 12/14

11:45 am-9:58 pm

2 stops27h 13m

$1,262

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

mar. 8/12

5:09 pm-6:55 am

1 stop22h 46m

Sydney Kingsford Smith

mar. 9/16

12:10 pm-11:23 pm

1 stop26h 13m

$1,346

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 27 results
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Best time to book a flight from Illinois to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Illinois 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 Illinois to Sydney

What is the cheapest month to book a flight from Illinois to Sydney?

Currently, February is the cheapest month in which you can book a flight from Illinois to Sydney (average of $1,028). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,619). 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 IL to SYD?

Find hourly flight availability from Illinois to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Sydney as you normally would.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated julio 31, 2025.
Read reviews from past customers who have flown ANA, Japan Airlines, and Fiji Airways from Illinois to Sydney. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
ANA
8.4
Very good
922 reviews
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Japan Airlines
8.3
Very good
1,536 reviews
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Fiji Airways
8.0
Very good
202 reviews
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Delta
8.0
Very good
7,981 reviews
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Air New Zealand
8.0
Very good
501 reviews
ANA
8.4
Very good
922 reviews

Food

7.7

Entertainment

7.9

Boarding

8.5

Overall

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Kenneth,Jul 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!

Related info for your journey

Find useful and relevant information for your journey from Illinois to Sydney. 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 into for flights to Sydney from Illinois?

    If you book a flight to Sydney from Illinois, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.

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

    For one-way options, check prices for Qantas Airways. According to our data, you can fly for as low as $792. Users have also found prices from $799 and $815 on ANA and Fiji Airways, respectively.

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

    While some choose either Chicago Midway - Sydney Kingsford Smith or Lambert-St Louis - Sydney Kingsford Smith, Chicago O'Hare Intl - Sydney Kingsford Smith is the most popular route from Illinois to Sydney.

  • Can I find deals for flights from Illinois to Sydney that include hotel bookings?

    Yes. In addition to deals on Illinois to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Sydney.

  • Can I find deals for business class flights from Illinois to Sydney?

    Yes. Cheapflights offers flight deals from Illinois to Sydney 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 Illinois to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Sydney (average of $1,028). Flying from Illinois to Sydney in December is currently the most expensive (average of $1,619). 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.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
Parramatta
Manly
Coogee

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Top 8 airlines flying from Illinois to Sydney

Discover the top 8 airlines that operate flights from Illinois to Sydney. 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$679Average$1,177FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$812Average$946FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$823Average$1,417FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$849Average$1,181FlexibilityNo cancel feeOn-time74%
DeltaCheapest$851Average$978FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$876Average$1,256FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$992Average$1,241FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,275Average$1,506FlexibilityNo cancel feeOn-time78%

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