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Cheap flights from Illinois to Adelaide from $1,228

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Illinois to Adelaide

Enter your travel dates to find the best prices.

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 28 October 2025.

Wed 10/1218:17ORD - ADL
2 stops29h 38mMultiple Airlines
Wed 17/1206:25ADL - ORD
2 stops26h 07mMultiple Airlines
Deal found 26/10$1,519
Sun 23/1118:25ORD - ADL
2 stops27h 15mUnited Airlines
Sun 30/1107:15ADL - ORD
2 stops39h 44mUnited Airlines
Deal found 26/10$1,736
Wed 10/1215:11ORD - ADL
2 stops27h 14mQantas Airways
Wed 17/1206:25ADL - ORD
2 stops26h 07mQantas Airways
Deal found 26/10$1,791
Wed 10/1221:05ORD - ADL
2 stops43h 55mUnited Airlines
Wed 17/1214:55ADL - ORD
1 stop30h 35mUnited Airlines
Deal found 26/10$1,860
Thu 11/1216:10ORD - ADL
1 stop24h 50mUnited Airlines
Sat 20/1214:55ADL - ORD
1 stop23h 07mUnited Airlines
Deal found 27/10$2,613
Sun 23/1111:42ORD - ADL
3 stops32h 48mMultiple Airlines
Sun 30/1120:55ADL - ORD
3 stops34h 16mMultiple Airlines
Deal found 26/10$2,946
Sun 23/1114:00ORD - ADL
3 stops31h 25mAir Canada
Sun 30/1106:10ADL - ORD
2 stops25h 01mAir Canada
Deal found 26/10$3,043
Tue 16/1218:17ORD - ADL
2 stops26h 13mMultiple Airlines
Tue 30/1206:25ADL - ORD
2 stops25h 38mMultiple Airlines
Deal found 26/10$3,547
Wed 10/1211:15ORD - ADL
3 stops34h 10mAir Canada
Wed 17/1206:10ADL - ORD
2 stops25h 01mAir Canada
Deal found 26/10$3,662
Tue 16/1218:35ORD - ADL
2 stops35h 25mUnited Airlines
Tue 30/1208:30ADL - ORD
2 stops29h 32mUnited Airlines
Deal found 27/10$3,789

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 28 October 2025.

Round-trip from

$1,228

Popular in

December

Cheapest in

February

Average price

$2,228
Air Canada
  • Air Canada
  • 23/2-4/3
  • 4 total stops
  • 54h 46m total
  • Illinois to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($755 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($163 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 28 October 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

Mon 23/2

15:40-13:55

2 stops29h 45m

Adelaide

Wed 4/3

06:10-14:41

2 stops25h 01m

$1,228

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 3/2

13:05-16:20

2 stops34h 45m

Adelaide

Tue 24/2

06:10-14:41

2 stops25h 01m

$1,234

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 23/2

11:05-09:30

1 stop29h 55m

Adelaide

Wed 4/3

14:55-23:26

1 stop25h 01m

$1,315

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 10/12

18:17-16:25

2 stops29h 38m

Adelaide

Wed 17/12

06:25-16:02

2 stops26h 07m

$1,519

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 23/2

14:00-13:55

3 stops31h 25m

Adelaide

Wed 4/3

06:10-14:41

2 stops25h 01m

$1,623

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 23/11

18:25-14:10

2 stops27h 15m

Adelaide

Sun 30/11

07:15-06:29

2 stops39h 44m

$1,736

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 10/12

15:11-10:55

2 stops27h 14m

Adelaide

Wed 17/12

06:25-16:02

2 stops26h 07m

$1,791

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 11/12

16:10-09:30

1 stop24h 50m

Adelaide

Sat 20/12

14:55-21:32

1 stop23h 07m

$2,613

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 20/12

21:04-16:25

2 stops50h 51m

$2,330

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 20/12

18:25-09:30

1 stop22h 35m

$2,466

Flights are sorted by cheapest return flights first.

Deals found on 25/10

Showing 1-10 of 13 results
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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 29h 55m. Air Canada provides one of the quickest options available for as low as $1,315. 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.

See more FAQs

Travelling to a place near Adelaide?

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

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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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