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Cheap flights from Adelaide to Illinois from $1,656

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
20 Jul — 27 Jul1
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 20 June 2026.

Mon 3/808:55
ADL
-
ORD
2 stops26h 04m
Multiple Airlines
Mon 10/815:54
ORD
-
ADL
2 stops25h 36m
Multiple Airlines
Deal found 19/6$1,656
Mon 3/807:50
ADL
-
ORD
2 stops26h 24m
Qantas Airways
Mon 10/815:54
ORD
-
ADL
2 stops27h 01m
Qantas Airways
Deal found 20/6$1,693
Sat 1/806:00
ADL
-
ORD
2 stops28h 14m
Qantas Airways
Sat 8/821:06
ORD
-
ADL
2 stops45h 49m
Qantas Airways
Deal found 17/6$1,713
Tue 21/706:00
ADL
-
ORD
2 stops24h 29m
Qantas Airways
Tue 28/715:21
ORD
-
ADL
2 stops27h 34m
Qantas Airways
Deal found 16/6$2,071
Tue 1/911:50
ADL
-
ORD
2 stops26h 10m
Qantas Airways
Thu 1/1013:50
ORD
-
ADL
2 stops29h 05m
Qantas Airways
Deal found 19/6$2,168
Thu 2/711:50
ADL
-
ORD
2 stops47h 50m
Multiple Airlines
Sat 18/700:30
ORD
-
ADL
2 stops44h 10m
Multiple Airlines
Deal found 16/6$2,536
Tue 21/706:00
ADL
-
ORD
2 stops24h 29m
Multiple Airlines
Tue 28/715:07
ORD
-
ADL
3 stops29h 28m
Multiple Airlines
Deal found 18/6$2,576
Tue 21/722:00
ADL
-
ORD
2 stops38h 28m
Qatar Airways
Tue 28/719:20
ORD
-
ADL
1 stop29h 10m
Qatar Airways
Deal found 19/6$2,628

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 20 June 2026.

Round-trip from

$1,656

Popular in

December

Cheapest in

April

Average price

$3,313
3/8-10/8
  • 3/8-10/8
  • 4 total stops
  • 51h 40m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($1,285 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($263 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 20 June 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
Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 3/8

08:55-20:29

2 stops26h 04m

Chicago O'Hare Intl

Mon 10/8

15:54-08:00

2 stops25h 36m

$1,656

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 1/8

06:00-19:44

2 stops28h 14m

Chicago O'Hare Intl

Sat 8/8

21:06-09:25

2 stops45h 49m

$1,713

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 2/7

11:50-21:10

2 stops47h 50m

Chicago O'Hare Intl

Sat 18/7

00:30-11:10

2 stops44h 10m

$2,536

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 21/7

06:00-15:59

2 stops24h 29m

Chicago O'Hare Intl

Tue 28/7

15:07-11:05

3 stops29h 28m

$2,576

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 3/8

22:00-21:58

2 stops38h 28m

Chicago O'Hare Intl

Mon 10/8

19:20-15:00

1 stop29h 10m

$2,784

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 19/7

20:00-14:35

2 stops33h 05m

Chicago O'Hare Intl

Sun 26/7

21:30-10:05

2 stops46h 05m

$2,830

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 21/7

20:00-08:00

3 stops50h 30m

Chicago O'Hare Intl

Tue 28/7

15:40-11:50

2 stops29h 40m

$2,872

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 3/8

20:00-22:05

3 stops40h 35m

Chicago O'Hare Intl

Mon 10/8

14:15-11:50

3 stops31h 05m

$2,888

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 1/7

06:05-18:35

2 stops27h 00m

Chicago O'Hare Intl

Thu 23/7

15:26-11:05

2 stops29h 09m

$2,902

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Sorted by cheapest first

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

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

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 $1,713, Qantas Airways can have you in Illinois from Adelaide in 28h 14m. There are 15937 km between Adelaide and Illinois.

  • 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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