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$839+ Cheap flights from Adelaide (ADL) to Illinois

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Cheap flight deals from Adelaide to Illinois

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 February 12, 2026.

This SmartFares deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:10 am
ADL
-
ORD
2 stops25h 01m
Multiple Airlines
Sun 3/158:40 pm
ORD
-
ADL
3 stops49h 45m
Multiple Airlines
Deal found 2/9$950
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/177:55 pm
ADL
-
ORD
2 stops35h 16m
Air Canada
Mon 3/163:35 pm
ORD
-
ADL
2 stops36h 05m
Air Canada
Deal found 2/9$983
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/177:55 pm
ADL
-
ORD
2 stops35h 16m
Air Canada
Sun 3/156:25 pm
ORD
-
ADL
3 stops52h 00m
Air Canada
Deal found 2/9$991
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:55 pm
ADL
-
ORD
3 stops42h 39m
Air Canada
Sun 3/156:25 pm
ORD
-
ADL
3 stops57h 15m
Air Canada
Deal found 2/9$1,000
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:10 am
ADL
-
ORD
2 stops25h 01m
Air Canada
Mon 3/163:35 pm
ORD
-
ADL
2 stops36h 05m
Air Canada
Deal found 2/9$1,031
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/177:55 pm
ADL
-
ORD
2 stops35h 16m
Air Canada
Wed 3/183:35 pm
ORD
-
ADL
2 stops35h 05m
Air Canada
Deal found 2/9$1,036
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:10 am
ADL
-
ORD
2 stops25h 01m
Air Canada
Wed 3/188:40 pm
ORD
-
ADL
3 stops49h 45m
Air Canada
Deal found 2/9$1,040
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:00 am
ADL
-
ORD
3 stops46h 30m
Air Canada
Mon 3/163:35 pm
ORD
-
ADL
2 stops36h 05m
Air Canada
Deal found 2/9$1,044
This Air Canada deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:00 am
ADL
-
ORD
3 stops32h 34m
Air Canada
Tue 3/178:00 am
ORD
-
ADL
3 stops42h 40m
Air Canada
Deal found 2/9$1,052
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/162:55 pm
ADL
-
ORD
1 stop21h 30m
United Airlines
Mon 3/166:17 am
ORD
-
ADL
1 stop35h 33m
United Airlines
Deal found 2/9$1,071

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 February 12, 2026.

Round-trip from

$1,091
(Qantas Airways)

One-way from

$839
(KAYAK)

Popular in

June

Cheapest in

March

Average price

$1,182
From Adelaide to Illinois
Search Deals
One-way flight from Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($204 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($86 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from Adelaide to Illinois that are best for you.

Fly from

Adelaide

Fly to

Illinois

Route

Depart

Return

Price

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 3/11

4:10 pm-11:47 pm

2 stops23h 07m

Chicago O'Hare Intl

Wed 3/18

7:29 pm-1:40 pm

2 stops26h 41m

$1,091

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 3/11

2:15 pm-8:15 pm

1 stop21h 30m

Chicago O'Hare Intl

Wed 3/18

9:15 pm-9:20 am

1 stop44h 35m

$1,123

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 2/22

6:25 am-2:53 pm

2 stops24h 58m

Chicago O'Hare Intl

Mon 3/16

4:44 pm-9:50 am

2 stops25h 36m

$1,256

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 2/22

6:25 am-2:53 pm

2 stops24h 58m

Chicago O'Hare Intl

Wed 3/11

4:44 pm-9:50 am

2 stops25h 36m

$1,256

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 2/22

8:55 pm-7:40 pm

2 stops39h 15m

Chicago O'Hare Intl

Wed 3/18

7:29 pm-1:40 pm

2 stops26h 41m

$1,295

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 4/30

1:25 pm-4:55 pm

2 stops42h 00m

Chicago O'Hare Intl

Wed 5/20

7:17 pm-11:05 am

2 stops25h 18m

$1,383

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 4/29

1:20 pm-5:47 am

2 stops30h 57m

Chicago O'Hare Intl

Sat 5/9

4:30 pm-1:40 pm

2 stops30h 40m

$1,404

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Fri 5/1

1:20 pm-5:47 am

2 stops30h 57m

Chicago O'Hare Intl

Fri 5/8

1:18 pm-9:25 am

2 stops29h 37m

$1,416

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Fri 3/27

6:10 am-2:55 pm

2 stops24h 15m

Chicago O'Hare Intl

Fri 4/3

2:15 pm-12:05 pm

2 stops30h 20m

$1,428

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 4/30

6:05 am-5:25 am

2 stops37h 50m

Chicago O'Hare Intl

Sat 5/23

9:33 pm-10:55 am

2 stops46h 52m

$1,710

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 14 results
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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 round-trip 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.

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?

    Located just 4.1 mi from the city center, Adelaide (ADL) is the airport most travelers will use when flying to Illinois from Adelaide.

  • How long is the flight from Adelaide to Illinois?

    There are many flights that can get you from Adelaide to Illinois in 21h 30m. Fly via United Airlines or American Airlines to get the fastest option. There are 9903 mi between Adelaide and Illinois. Both multi-stop and nonstop 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 vacation 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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