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Cheap flights from Illinois to Adelaide from $2,023

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
3 Sep — 10 Sep1
1 adult

Cheap flight deals from Illinois to Adelaide

Keep the following information in mind while searching for Illinois to Adelaide flight deals. Data was last updated 29 August 2025.

Round-trip from

$2,023

Popular in

November

Cheapest in

February

Average price

$2,563
Air New Zealand
  • Air New Zealand
  • 17/10-12/11
  • 4 total stops
  • 72h 20m total
  • Illinois to Adelaide
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($1,279 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($246 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Illinois to Adelaide

Cheapest flights from Illinois to Adelaide
Explore the most affordable flight options available from Illinois to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Fri 17/1020:05ORD - ADL
2 stops47h 20mAir New Zealand
Wed 12/1111:55ADL - ORD
2 stops25h 00mAir New Zealand
Deal found 26/8$2,023
Mon 20/1021:45ORD - ADL
2 stops47h 20mMultiple Airlines
Sat 25/1013:35ADL - ORD
2 stops25h 37mMultiple Airlines
Deal found 27/8$2,071
Sat 18/1019:01ORD - ADL
2 stops26h 04mFiji Airways
Sat 8/1113:15ADL - ORD
2 stops22h 55mFiji Airways
Deal found 27/8$2,203
Sun 19/1018:03ORD - ADL
2 stops26h 32mMultiple Airlines
Wed 29/1007:50ADL - ORD
2 stops24h 30mMultiple Airlines
Deal found 27/8$2,488
Sat 6/919:20ORD - ADL
1 stop30h 00mQatar Airways
Tue 16/918:20ADL - ORD
2 stops35h 00mQatar Airways
Deal found 27/8$2,494
Sat 18/1015:47ORD - ADL
2 stops48h 58mAir New Zealand
Sun 9/1111:55ADL - ORD
2 stops35h 04mAir New Zealand
Deal found 29/8$2,526
Sun 19/1019:41ORD - ADL
2 stops35h 19mAir Canada
Wed 29/1019:55ADL - ORD
3 stops39h 05mAir Canada
Deal found 27/8$2,587
Fri 17/1021:45ORD - ADL
2 stops47h 20mMultiple Airlines
Sat 8/1113:15ADL - ORD
2 stops24h 36mMultiple Airlines
Deal found 29/8$2,603
Fri 17/1018:03ORD - ADL
2 stops37h 02mMultiple Airlines
Fri 7/1119:55ADL - ORD
2 stops35h 16mMultiple Airlines
Deal found 28/8$2,609
Fri 17/1016:50ORD - ADL
2 stops26h 35mAir New Zealand
Fri 7/1111:55ADL - ORD
2 stops25h 00mAir New Zealand
Deal found 29/8$2,615

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Adelaide 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 647,157 searches. Data last updated 29 August 2025.
Use the filters below to find and compare flights from Illinois to Adelaide that are best for you.

Fly from

Illinois

Fly to

Adelaide

Route

Depart

Return

Price

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 17/10

20:05-10:55

2 stops47h 20m

Adelaide

Wed 12/11

11:55-20:25

2 stops25h 00m

$2,023

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 20/10

21:45-12:35

2 stops47h 20m

Adelaide

Sat 25/10

13:35-23:42

2 stops25h 37m

$2,071

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 24/2

14:25-10:55

2 stops28h 00m

Adelaide

Tue 10/3

06:05-14:37

2 stops24h 02m

$2,131

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 18/10

19:01-12:35

2 stops26h 04m

Adelaide

Sat 8/11

13:15-19:40

2 stops22h 55m

$2,203

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 19/10

18:03-12:05

2 stops26h 32m

Adelaide

Wed 29/10

07:50-16:50

2 stops24h 30m

$2,488

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 24/2

15:40-16:20

2 stops32h 10m

Adelaide

Tue 10/3

06:00-21:59

3 stops31h 29m

$2,518

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 18/10

15:47-08:15

2 stops48h 58m

Adelaide

Sun 9/11

11:55-06:29

2 stops35h 04m

$2,526

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 19/10

19:41-22:30

2 stops35h 19m

Adelaide

Wed 29/10

19:55-19:30

3 stops39h 05m

$2,587

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 17/10

21:45-12:35

2 stops47h 20m

Adelaide

Sat 8/11

13:15-21:21

2 stops24h 36m

$2,603

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 17/10

18:03-22:35

2 stops37h 02m

Adelaide

Fri 7/11

19:55-14:41

2 stops35h 16m

$2,609

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 13 results
1
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Best time to book a flight from Illinois to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Illinois with our price prediction graph.
Estimated return 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 Adelaide
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Adelaide. 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 Adelaide from Illinois?

    Adelaide (ADL) is the airport you will fly into if you book a flight from Illinois to Adelaide. It is only a 6.6 km journey from Adelaide (ADL) to Adelaide’s city centre.

  • How long is the flight from Illinois to Adelaide?

    A quick flight from Illinois to Adelaide can take about 26h 04m. Air New Zealand provides one of the quickest options available for as low as $2,203. Illinois and Adelaide are separated by a distance of 15937 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Illinois to Adelaide (average of $168). Flying from Illinois to Adelaide in October is currently the most expensive (average of $241). 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 Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg
Stirling

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Why should you use Cheapflights to find cheap flight tickets from Illinois to Adelaide?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Adelaide from Illinois.

Can Cheapflights find flights from Illinois to Adelaide with no change fees?

Need flexible booking options for your flight to Adelaide from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Adelaide become cheaper?

Yes! Start tracking prices for Illinois to Adelaide flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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