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Cheap flights from Adelaide to Illinois from $1,838

ADL — ORD
18 Sep — 25 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

Wed 16/906:05 -
3 stops41h 45m
Wed 23/906:30 -
3 stops44h 10m
Deal found 17/8$1,838
Tue 29/910:10 -
2 stops42h 15m
Tue 6/1016:15 -
2 stops34h 00m
Deal found 15/8$2,293
Sun 13/914:25 -
2 stops62h 25m
Sat 19/916:15 -
2 stops35h 00m
Deal found 14/8$2,294
Sun 4/1007:50 -
2 stops45h 35m
Mon 15/315:35 -
1 stop27h 25m
Deal found 15/8$2,318
Tue 29/922:00 -
2 stops35h 31m
Tue 6/1019:20 -
1 stop29h 10m
Deal found 15/8$2,334
Thu 8/1019:45 -
2 stops57h 40m
Fri 12/314:35 -
1 stop27h 25m
Deal found 15/8$2,366
Sun 4/1007:50 -
2 stops45h 35m
Tue 16/315:35 -
2 stops48h 00m
Deal found 15/8$2,409
Mon 5/1014:20 -
2 stops33h 45m
Mon 15/314:10 -
2 stops38h 30m
Deal found 15/8$2,454
Fri 2/1007:50 -
2 stops44h 35m
Fri 12/314:35 -
1 stop27h 25m
Deal found 15/8$2,456
Thu 8/1019:45 -
2 stops57h 40m
Mon 15/315:35 -
2 stops34h 40m
Deal found 15/8$2,464
Wed 7/1014:20 -
2 stops63h 05m
Wed 17/315:35 -
1 stop27h 25m
Deal found 15/8$2,516
Sun 13/922:00 -
2 stops35h 31m
Sat 19/919:20 -
1 stop29h 10m
Deal found 14/8$2,541

Find flight deals from Adelaide to Illinois

Round-trip from

$1,838

Popular in

December

Cheapest in

May

Average price

$2,286
16/9-23/9
  • 16/9-23/9
  • 6 total stops
  • 85h 55m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 33% potential increase in price ($1,447 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($304 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
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 Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Wed 16/9

06:05-09:20

3 stops41h 45m

Chicago O'Hare Intl

Wed 23/9

06:30-17:10

3 stops44h 10m

$1,838

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Sun 13/9

14:25-14:20

2 stops62h 25m

Chicago O'Hare Intl

Sat 19/9

16:15-17:45

2 stops35h 00m

$2,294

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Thu 8/10

19:45-13:55

2 stops57h 40m

Chicago O'Hare Intl

Fri 12/3

14:35-17:45

2 stops34h 40m

$2,464

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Wed 7/10

14:20-13:55

2 stops63h 05m

Chicago O'Hare Intl

Mon 15/3

15:35-10:30

1 stop27h 25m

$2,516

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Sun 13/9

22:00-19:01

2 stops35h 31m

Chicago O'Hare Intl

Sat 19/9

19:20-15:00

1 stop29h 10m

$2,541

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Fri 2/10

14:20-13:55

2 stops38h 05m

Chicago O'Hare Intl

Sun 14/3

15:35-15:45

2 stops32h 40m

$2,555

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Fri 2/10

14:20-13:55

2 stops38h 05m

Chicago O'Hare Intl

Wed 17/3

15:35-17:45

2 stops34h 40m

$2,555
Fastest return journey

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Wed 16/9

07:50-19:36

2 stops26h 16m

Chicago O'Hare Intl

Wed 23/9

17:50-11:55

2 stops27h 35m

$2,559

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Sun 13/9

20:00-22:05

3 stops40h 35m

Chicago O'Hare Intl

Sat 19/9

14:15-11:50

3 stops31h 05m

$3,137

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Wed 16/9

22:00-15:55

1 stop32h 25m

Chicago O'Hare Intl

Wed 23/9

20:35-20:05

1 stop33h 00m

$3,737

Flights are sorted by cheapest return flights first.

Deals found on 16/8

Showing 1-10 of 13 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

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?

Airfare is below average for this route at the moment.
Adelaide to Illinois flights typically cost between $2,489 and $2,866 in September.
The cheapest return price found within the last 5 days was $1,838 on Multiple Airlines (16 Sept–23 Sept).

Reviews of airlines servicing Illinois

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
1,083 reviews
Check prices

Overall

7.5

Boarding

7.7

Crew

8.1

Food

7.0

Comfort

7.4

Entertainment

7.2

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
1,083 reviews
Qantas Airways
7.5
Good
1,083 reviews
Check prices

Overall

7.5

Boarding

7.7

Crew

8.1

Food

7.0

Comfort

7.4

Entertainment

7.2

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

  • 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 $2,541, Cathay Pacific can have you in Illinois from Adelaide in 35h 31m. 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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Not ready to book yet? You can track prices for flights from Adelaide to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.

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