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$899+ Cheap flights from Adelaide (ADL) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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Find 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 November 2, 2025.

This BestPriceTravel deal was found by Cheapflights users on 10/31. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:50 amADL - ORD
2 stops31h 47mQantas Airways
Mon 12/1511:55 amORD - ADL
2 stops29h 00mQantas Airways
Deal found 10/31$1,105
This BestPriceTravel deal was found by Cheapflights users on 10/31. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:00 amADL - ORD
2 stops24h 55mVirgin Australia
Mon 12/156:35 pmORD - ADL
1 stop22h 25mVirgin Australia
Deal found 10/31$1,274
This Qantas Airways deal was found by Cheapflights users on 10/31. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:10 pmADL - ORD
2 stops23h 27mMultiple Airlines
Mon 12/152:48 pmORD - ADL
3 stops27h 37mMultiple Airlines
Deal found 10/31$1,753
This Air Canada deal was found by Cheapflights users on 10/31. 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 11/156:00 amADL - ORD
3 stops30h 00mAir Canada
Mon 12/1511:15 amORD - ADL
3 stops34h 10mAir Canada
Deal found 10/31$2,035
This JetBlue deal was found by Cheapflights users on 10/31. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:00 pmADL - ORD
1 stop33h 00mJetBlue
Mon 12/156:50 pmORD - ADL
1 stop29h 45mJetBlue
Deal found 10/31$2,377

Cheap flight deals from Adelaide to Illinois

Keep the following information in mind while searching for Adelaide to Illinois flight deals. Data was last updated November 2, 2025.

Round-trip from

$899
(BestPriceTravel)

Popular in

December

Cheapest in

April

Average price

$1,552
From Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 2, 2025.
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

Thu 3/19

6:10 am-2:41 pm

2 stops24h 01m

Chicago O'Hare Intl

Tue 4/28

3:40 pm-11:50 am

2 stops29h 40m

$899

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 11/15

7:50 am-11:07 pm

2 stops31h 47m

Chicago O'Hare Intl

Mon 12/15

11:55 am-9:25 am

2 stops29h 00m

$1,105

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 3/8

6:55 pm-7:53 pm

2 stops40h 28m

Chicago O'Hare Intl

Wed 3/11

1:00 pm-10:30 pm

2 stops42h 00m

$1,256

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 11/15

6:00 am-2:25 pm

2 stops24h 55m

Chicago O'Hare Intl

Mon 12/15

6:35 pm-9:30 am

1 stop22h 25m

$1,274

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 3/8

6:05 am-12:55 pm

2 stops47h 20m

Chicago O'Hare Intl

Wed 3/11

3:35 pm-10:30 am

1 stop27h 25m

$1,470

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

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

What is the cheapest time of day to fly from ADL to IL?

Find hourly flight availability from Adelaide to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2025.

It’s optimal to fly from Adelaide to Illinois at noon. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight in the afternoon.

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 24h 01m. Fly via Air Canada or Qantas Airways 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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