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Cheap flights from Adelaide to Illinois from $1,325

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
15 Jun — 22 Jun1
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 16 May 2026.

Mon 8/606:00
ADL
-
ORD
2 stops24h 19m
Qantas Airways
Mon 22/620:55
ORD
-
ADL
2 stops47h 50m
Qantas Airways
Deal found 15/5$1,791
Sun 22/1119:00
ADL
-
ORD
3 stops28h 30m
Multiple Airlines
Fri 8/108:00
ORD
-
ADL
3 stops34h 25m
Multiple Airlines
Deal found 15/5$2,708
Thu 9/706:05
ADL
-
ORD
2 stops27h 00m
Multiple Airlines
Tue 21/716:30
ORD
-
ADL
2 stops28h 05m
Multiple Airlines
Deal found 14/5$2,805
Sun 28/620:00
ADL
-
ORD
2 stops48h 16m
United Airlines
Sun 5/721:35
ORD
-
ADL
2 stops47h 00m
United Airlines
Deal found 14/5$2,854
Sun 22/1111:55
ADL
-
ORD
2 stops25h 46m
Air New Zealand
Fri 8/115:51
ORD
-
ADL
2 stops26h 34m
Air New Zealand
Deal found 15/5$2,872
Tue 1/911:50
ADL
-
ORD
3 stops27h 08m
Multiple Airlines
Thu 1/1017:43
ORD
-
ADL
2 stops25h 12m
Multiple Airlines
Deal found 15/5$2,893
Thu 11/606:05
ADL
-
ORD
2 stops31h 24m
United Airlines
Wed 17/621:48
ORD
-
ADL
2 stops46h 47m
United Airlines
Deal found 12/5$2,907
Tue 25/813:25
ADL
-
ORD
2 stops25h 04m
Multiple Airlines
Thu 1/1017:43
ORD
-
ADL
2 stops25h 12m
Multiple Airlines
Deal found 12/5$2,914
Sun 22/1107:15
ADL
-
ORD
2 stops32h 17m
Virgin Australia
Fri 8/121:30
ORD
-
ADL
1 stop43h 30m
Virgin Australia
Deal found 15/5$2,920
Mon 8/617:35
ADL
-
ORD
2 stops35h 40m
Multiple Airlines
Mon 22/614:15
ORD
-
ADL
3 stops31h 05m
Multiple Airlines
Deal found 15/5$2,967
Sun 22/1112:00
ADL
-
ORD
1 stop41h 25m
Cathay Pacific
Fri 8/114:35
ORD
-
ADL
1 stop27h 25m
Cathay Pacific
Deal found 15/5$2,981

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 16 May 2026.

Round-trip from

$1,791

One-way from

$1,325

Popular in

June

Cheapest in

March

Average price

$1,636
Qantas Airways
  • Qantas Airways
  • 8/6-22/6
  • 4 total stops
  • 72h 09m total
  • Adelaide to Illinois
Search Deals
10/7
  • 10/7
  • 3 total stops
  • 49h 12m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($456 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($169 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 16 May 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

Sun 28/6

20:00-05:46

2 stops48h 16m

Chicago O'Hare Intl

Sun 5/7

21:35-11:05

2 stops47h 00m

$2,854
Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 1/9

11:50-00:28

3 stops27h 08m

Chicago O'Hare Intl

Thu 1/10

17:43-09:25

2 stops25h 12m

$2,893

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 11/6

06:05-22:59

2 stops31h 24m

Chicago O'Hare Intl

Wed 17/6

21:48-11:05

2 stops46h 47m

$2,907

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 25/8

20:00-14:41

2 stops33h 11m

Chicago O'Hare Intl

Thu 1/10

09:50-11:55

3 stops35h 35m

$2,992

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 9/7

12:40-00:51

3 stops26h 41m

Chicago O'Hare Intl

Tue 21/7

17:10-09:25

2 stops25h 45m

$3,018

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 1/9

22:00-15:05

1 stop31h 35m

Chicago O'Hare Intl

Thu 1/10

19:20-15:50

1 stop30h 00m

$3,352

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 8/6

18:20-16:50

2 stops37h 00m

Chicago O'Hare Intl

Mon 22/6

19:20-15:25

1 stop29h 35m

$3,481

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 11/6

18:55-14:45

2 stops34h 20m

Chicago O'Hare Intl

Wed 17/6

12:55-11:50

3 stops32h 25m

$3,545

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 28/6

22:20-15:05

1 stop31h 15m

Chicago O'Hare Intl

Sun 5/7

19:20-15:30

1 stop29h 40m

$3,833

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 8/6

20:00-22:05

3 stops40h 35m

Chicago O'Hare Intl

Mon 22/6

14:15-13:55

3 stops33h 10m

$4,497

Flights are sorted by cheapest return flights first.

Deals found on 14/5

Showing 1-10 of 14 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

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

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 16 May 2026.
Get a feel of what it's like to fly with Qantas Airways and Air Canada 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
1,037 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Boarding

7.7

Comfort

7.4

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
1,037 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Boarding

7.7

Comfort

7.4

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!
Air Canada
7.1
Good
11,046 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Boarding

7.7

Comfort

7.4

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 $2,805, Qantas Airways can have you in Illinois from Adelaide in 25h 04m. 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Adelaide to Illinois

Discover the top 2 airlines that operate flights from Adelaide to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 16 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,351Average$1,884FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,389Average$1,651FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Adelaide to Illinois?

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.

Can Cheapflights notify me if prices for flights from Adelaide to Illinois become cheaper?

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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