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Cheap flights from Adelaide to Illinois from $1,835

ADL — ORD
23 Sep — 30 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

Tue 6/1006:00 -
3 stops45h 21m
Mon 19/1006:30 -
3 stops44h 10m
Deal found 21/8$1,835
Thu 27/806:05 -
3 stops38h 24m
Mon 14/906:30 -
3 stops37h 05m
Deal found 19/8$1,846
Tue 1/920:10 -
2 stops48h 19m
Thu 17/906:00 -
3 stops38h 25m
Deal found 20/8$2,040
Thu 5/1118:30 -
2 stops35h 31m
Mon 9/1121:06 -
2 stops48h 44m
Deal found 21/8$2,139
Thu 5/1110:10 -
2 stops43h 15m
Mon 9/1114:35 -
1 stop27h 25m
Deal found 20/8$2,299
Fri 4/919:45 -
2 stops57h 05m
Mon 21/916:15 -
2 stops50h 40m
Deal found 22/8$2,327
Thu 3/1212:05 -
2 stops29h 08m
Mon 7/1215:00 -
2 stops27h 25m
Deal found 23/8$2,505

Find flight deals from Adelaide to Illinois

Round-trip from

$1,835

Popular in

December

Cheapest in

May

Average price

$2,263
6/10-19/10
  • 6/10-19/10
  • 6 total stops
  • 89h 31m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 35% potential increase in price ($1,611 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($293 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

Thu 5/11

10:10-12:55

2 stops43h 15m

Chicago O'Hare Intl

Mon 9/11

14:35-10:30

1 stop27h 25m

$2,299

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Thu 3/12

06:00-19:58

3 stops30h 28m

Chicago O'Hare Intl

Mon 7/12

15:30-14:05

2 stops30h 05m

$2,579

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Tue 6/10

20:00-19:48

3 stops39h 18m

Chicago O'Hare Intl

Mon 12/10

15:40-12:10

2 stops29h 00m

$2,669

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Wed 7/10

06:00-19:48

3 stops29h 18m

Chicago O'Hare Intl

Wed 14/10

15:40-18:25

2 stops35h 15m

$2,673

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Thu 3/12

06:10-07:13

2 stops41h 33m

Chicago O'Hare Intl

Thu 7/1

06:00-09:30

1 stop35h 00m

$2,752

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Thu 5/11

06:10-14:37

2 stops24h 57m

Chicago O'Hare Intl

Mon 9/11

12:50-18:10

3 stops36h 50m

$2,791
Fastest return journey

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Mon 5/10

07:40-21:37

2 stops29h 27m

Chicago O'Hare Intl

Mon 12/10

15:35-12:10

2 stops29h 05m

$2,885

AdelaideChicago

ADL Adelaide - ORD Chicago O'Hare Intl

ADLORD

Adelaide

Fri 4/9

22:00-16:16

2 stops56h 46m

Chicago O'Hare Intl

Mon 21/9

19:20-15:00

1 stop29h 10m

$3,317

Flights are sorted by cheapest return flights first.

Deals found on 20/8

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

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 $1,976 and $2,367 in October.
The cheapest return price found within the last 5 days was $1,835 on Multiple Airlines (6 Oct–19 Oct).

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
1,085 reviews
Check prices

Comfort

7.4

Overall

7.5

Entertainment

7.2

Crew

8.1

Food

7.0

Boarding

7.7

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
1,085 reviews
Qantas Airways
7.5
Good
1,085 reviews
Check prices

Comfort

7.4

Overall

7.5

Entertainment

7.2

Crew

8.1

Food

7.0

Boarding

7.7

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 $2,669, Cathay Pacific can have you in Illinois from Adelaide in 39h 18m. 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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Cheapflights helps you search for flights from Adelaide to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Adelaide to Illinois by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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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