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Cheap flights from Illinois to Sydney from $948

ORD — SYD
12 Nov — 19 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Sydney

Sun 25/1006:55 -
2 stops33h 40m
Sun 8/1107:30 -
2 stops31h 10m
Deal found 8/10$1,881
Wed 11/1106:30 -
3 stops33h 05m
Wed 18/1107:30 -
3 stops33h 51m
Deal found 12/10$1,885
Wed 28/1006:00 -
2 stops35h 50m
Sun 1/1111:30 -
2 stops34h 32m
Deal found 12/10$1,887
Mon 19/1006:00 -
2 stops35h 00m
Thu 5/1111:30 -
2 stops34h 32m
Deal found 13/10$1,889
Wed 21/1006:00 -
2 stops35h 00m
Thu 5/1111:30 -
2 stops34h 32m
Deal found 8/10$1,891
Fri 23/1006:25 -
2 stops34h 10m
Wed 4/1114:05 -
2 stops24h 57m
Deal found 8/10$1,902
Wed 25/1115:30 -
1 stop25h 05m
Wed 2/1211:20 -
1 stop20h 17m
Deal found 11/10$1,905
Sat 7/1119:55 -
2 stops43h 40m
Fri 13/1114:05 -
2 stops23h 32m
Deal found 12/10$1,915
Tue 17/1110:34 -
2 stops29h 01m
Fri 11/1214:05 -
2 stops23h 32m
Deal found 10/10$1,921

Find flight deals from Illinois to Sydney

Round-trip from

$1,879

One-way from

$948

Popular in

December

Cheapest in

February

Average price

$2,303
Air New Zealand
  • Air New Zealand
  • 11/4-17/4
  • 4 total stops
  • 84h 05m total
  • Illinois to Sydney
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26/11-31/12
  • 26/11-31/12
  • 2 total stops
  • 53h 15m total
  • Illinois to Sydney
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Illinois to Sydney that are best for you.

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Route

Depart

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Price

Cheapest return flight

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 10/11

21:04-09:50

2 stops67h 46m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,004

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 19/3

23:45-10:45

1 stop43h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,040

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 10/11

07:20-06:25

3 stops30h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,208

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 23/12

07:00-06:25

2 stops30h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,478

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 4/11

06:29-09:50

2 stops34h 21m

Sydney Kingsford Smith

Sun 15/11

11:30-05:02

2 stops34h 32m

$1,891

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sat 2/1

21:50-09:05

1 stop42h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$2,092

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 29/12

11:45-19:25

2 stops38h 40m

Sydney Kingsford Smith

Tue 12/1

21:35-10:00

2 stops53h 25m

$2,136

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 29/12

11:45-19:25

2 stops38h 40m

Sydney Kingsford Smith

Tue 2/2

21:35-10:00

2 stops53h 25m

$2,136

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 6/1

20:15-19:25

2 stops54h 10m

Sydney Kingsford Smith

Thu 21/1

21:35-18:20

2 stops37h 45m

$2,139

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 29/12

11:45-19:25

2 stops38h 40m

Sydney Kingsford Smith

Sat 23/1

21:35-10:00

2 stops53h 25m

$2,222

Flights are sorted by cheapest return flights first.

Deals found on 10/10

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 return price

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 $1,755). Flying from Illinois to Sydney in December is currently the most expensive (average of $2,513). 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.

How much does it cost for a return flight from Illinois to Sydney?

Airfare is typical for this route at the moment.
Illinois to Sydney flights typically cost between $1,780 and $2,371 in April.
The cheapest return price found within the last 5 days was $1,879 on Air New Zealand (11 Apr–17 Apr).

How far ahead should I book a flight from Illinois to Sydney?

The price you pay for your flight from Illinois to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Related info for your journey

  • What airport do you fly into for flights to Sydney from Illinois?

    Located just 7.5 km from the city centre, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Sydney from Illinois.

  • How long is the flight from Illinois to Sydney?

    A quick flight from Illinois to Sydney can take about 38h 40m. Turkish Airlines provides one of the quickest options available for as low as $2,136. The distance between Illinois and Sydney is about 14851 km.

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

    When deciding which route to take from Illinois to Sydney, consider Chicago O'Hare Intl - Sydney Kingsford Smith, Chicago Midway - Sydney Kingsford Smith or Lambert-St Louis - Sydney Kingsford Smith, as they are the most popular.

  • 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 holiday 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 $1,755). Flying from Illinois to Sydney in December is currently the most expensive (average of $2,513). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Manly
Lithgow
Cronulla
Terrigal
Katoomba
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Illinois to Sydney

AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$2,270Average$2,338FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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When you search for this flight from Illinois to Sydney, 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.

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Yes! Cheapflights helps users easily find flights from Illinois to Sydney with no change fees.

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