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Cheap flights from Adelaide to Illinois from $986

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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
30 Aug — 6 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Adelaide to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Adelaide to Illinois
Explore the most affordable flight options available from Adelaide to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2026.

Tue 8/920:00
ADL
-
ORD
2 stops33h 13m
Air Canada
Sun 13/915:40
ORD
-
ADL
2 stops31h 45m
Air Canada
Deal found 30/7$1,582
Sun 13/921:20
ADL
-
ORD
2 stops31h 53m
Air Canada
Sun 20/919:48
ORD
-
ADL
2 stops24h 52m
Air Canada
Deal found 29/7$1,618
Thu 27/820:00
ADL
-
ORD
2 stops33h 06m
Air Canada
Mon 31/815:40
ORD
-
ADL
2 stops31h 45m
Air Canada
Deal found 27/7$1,628
Fri 11/920:00
ADL
-
ORD
2 stops33h 13m
Air Canada
Fri 18/915:40
ORD
-
ADL
2 stops33h 45m
Air Canada
Deal found 28/7$1,794
Sat 12/909:30
ADL
-
ORD
2 stops43h 43m
Multiple Airlines
Sat 19/915:40
ORD
-
ADL
2 stops38h 50m
Multiple Airlines
Deal found 29/7$1,817
Fri 11/912:25
ADL
-
ORD
2 stops40h 48m
Multiple Airlines
Fri 18/909:55
ORD
-
ADL
3 stops38h 50m
Multiple Airlines
Deal found 28/7$1,830

Find flight deals from Adelaide to Illinois

Keep the following information in mind while searching for Adelaide to Illinois flight deals. Data was last updated 31 July 2026.

Round-trip from

$1,582

One-way from

$986

Popular in

December

Cheapest in

May

Average price

$1,828
Air Canada
  • Air Canada
  • 8/9-13/9
  • 4 total stops
  • 64h 58m total
  • Adelaide to Illinois
Search Deals
6/8
  • 6/8
  • 2 total stops
  • 32h 12m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 34% potential increase in price ($1,563 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($322 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Adelaide to Illinois 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 31 July 2026.
Use the filters below to find and compare flights from Adelaide to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Fri 11/9

12:05-05:01

2 stops31h 26m

Chicago O'Hare Intl

Fri 18/9

16:30-10:55

2 stops27h 55m

$2,225

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Fri 11/9

20:00-19:48

3 stops38h 18m

Chicago O'Hare Intl

Fri 18/9

21:18-11:50

3 stops48h 02m

$2,237

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 12/9

17:10-14:43

2 stops36h 03m

Chicago O'Hare Intl

Sat 19/9

14:52-13:55

3 stops32h 33m

$2,283

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 14/10

10:10-13:55

2 stops67h 15m

Chicago O'Hare Intl

Mon 9/11

14:35-10:30

1 stop27h 25m

$2,310

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 12/9

12:40-14:20

2 stops64h 10m

Chicago O'Hare Intl

Sat 19/9

16:15-09:25

2 stops50h 40m

$2,405

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 27/8

20:00-14:36

2 stops33h 06m

Chicago O'Hare Intl

Mon 31/8

15:40-13:55

2 stops31h 45m

$2,478

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 13/9

22:00-21:58

2 stops38h 28m

Chicago O'Hare Intl

Sun 20/9

19:20-15:00

1 stop29h 10m

$2,721
Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 13/10

06:10-18:34

2 stops27h 54m

Chicago O'Hare Intl

Wed 11/11

16:35-13:00

2 stops27h 55m

$2,798

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 11/8

20:00-19:52

3 stops38h 22m

Chicago O'Hare Intl

Fri 14/8

20:40-11:50

3 stops48h 40m

$3,054

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 27/8

22:00-08:52

2 stops73h 22m

Chicago O'Hare Intl

Mon 31/8

19:20-15:00

1 stop29h 10m

$3,130

Flights are sorted by cheapest return flights first.

Deals found on 28/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from Adelaide to Illinois

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

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated 31 July 2026.
Get a feel of what it's like to fly with Qantas Airways from Adelaide to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
1,073 reviews
Check prices

Comfort

7.4

Boarding

7.7

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
Qantas Airways
7.5
Good
1,073 reviews
Qantas Airways
7.5
Good
1,073 reviews
Check prices

Comfort

7.4

Boarding

7.7

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!

Related info for your journey

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

    If you book a flight to Illinois from Adelaide, you will be flying from Adelaide, which is the city’s only airport. Adelaide (ADL) is located 6.6 km from the centre of Adelaide.

  • How long is the flight from Adelaide to Illinois?

    For as low as $2,225, Air New Zealand can have you in Illinois from Adelaide in 31h 26m. There are 15937 km between Adelaide and Illinois. Both multi-stop and direct flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Adelaide to Illinois 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

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

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

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

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