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Cheap flights from Illinois to Adelaide from $991

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 August 2026.

Sat 12/906:30 -
3 stops38h 35m
Sat 19/912:35 -
3 stops35h 15m
Deal found 2/8$1,761
Tue 1/919:20 -
1 stop29h 10m
Wed 16/917:50 -
2 stops35h 45m
Deal found 4/8$1,977
Sat 12/919:20 -
2 stops33h 20m
Sat 19/922:00 -
1 stop31h 35m
Deal found 2/8$1,984
Tue 15/919:20 -
1 stop29h 10m
Tue 22/906:05 -
2 stops47h 30m
Deal found 1/8$1,997
Sat 19/915:40 -
2 stops31h 45m
Sat 26/919:35 -
2 stops33h 38m
Deal found 5/8$2,004
Sat 19/919:20 -
2 stops33h 20m
Sat 26/922:00 -
1 stop31h 35m
Deal found 5/8$2,014

Find flight deals from Illinois to Adelaide

Keep the following information in mind while searching for Illinois to Adelaide flight deals. Data was last updated 6 August 2026.

Round-trip from

$1,761

One-way from

$991
12/9-19/9
  • 12/9-19/9
  • 6 total stops
  • 73h 50m total
  • Illinois to Adelaide
Search Deals
3/9
  • 3/9
  • 3 total stops
  • 41h 45m total
  • Illinois to Adelaide
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 6 August 2026.
Use the filters below to find and compare flights from Illinois to Adelaide that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Tue 1/9

19:20-15:00

1 stop29h 10m

Adelaide

Wed 16/9

17:50-15:05

2 stops35h 45m

$1,977

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Sat 12/9

19:20-19:10

2 stops33h 20m

Adelaide

Sat 19/9

22:00-15:05

1 stop31h 35m

$1,984

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Tue 15/9

19:20-15:00

1 stop29h 10m

Adelaide

Tue 22/9

17:50-15:05

2 stops35h 45m

$2,045
Fastest return journey

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Mon 19/10

12:59-13:55

3 stops33h 26m

Adelaide

Tue 10/11

06:10-14:37

2 stops24h 57m

$2,058

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Tue 15/9

15:40-11:50

2 stops29h 40m

Adelaide

Tue 22/9

20:00-14:43

2 stops33h 13m

$2,062

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Sat 7/11

08:49-16:20

2 stops39h 01m

Adelaide

Fri 13/11

06:10-20:01

2 stops30h 21m

$2,102

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Sat 19/9

19:20-20:15

2 stops34h 25m

Adelaide

Sat 26/9

22:00-15:05

1 stop31h 35m

$2,106

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Sat 12/9

14:15-11:50

3 stops31h 05m

Adelaide

Sat 19/9

18:30-14:43

2 stops34h 43m

$2,117

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Wed 16/9

19:20-15:00

1 stop29h 10m

Adelaide

Wed 23/9

16:30-15:05

2 stops37h 05m

$2,239
Cheapest one-way

ChicagoAdelaide

ORD Chicago O'Hare Intl - ADL Adelaide

ORDADL

Chicago O'Hare Intl

Mon 31/8

09:20-10:35

3 stops34h 45m

$1,055

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 18 resultsSorted by cheapest first
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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 10m. Qatar Airways provides one of the quickest options available for as low as $1,977. 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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Deals for Illinois to Adelaide flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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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