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$804+ Cheap flights from Illinois to Adelaide (ADL)

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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Find flight deals from Illinois to Adelaide

Cheapest flights from Illinois to Adelaide
Explore the most affordable flight options available from Illinois to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Qantas Airways deal was found by Cheapflights users on 10/26. 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.
Wed 12/106:17 pmORD - ADL
2 stops29h 38mMultiple Airlines
Wed 12/176:25 amADL - ORD
2 stops26h 07mMultiple Airlines
Deal found 10/26$995
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Sun 11/236:25 pmORD - ADL
2 stops27h 15mUnited Airlines
Sun 11/307:15 amADL - ORD
2 stops39h 44mUnited Airlines
Deal found 10/26$1,137
This Qantas Airways deal was found by Cheapflights users on 10/26. 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.
Wed 12/103:11 pmORD - ADL
2 stops27h 14mQantas Airways
Wed 12/176:25 amADL - ORD
2 stops26h 07mQantas Airways
Deal found 10/26$1,173
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 12/109:05 pmORD - ADL
2 stops43h 55mUnited Airlines
Wed 12/172:55 pmADL - ORD
1 stop30h 35mUnited Airlines
Deal found 10/26$1,218
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 12/114:10 pmORD - ADL
1 stop24h 50mUnited Airlines
Sat 12/202:55 pmADL - ORD
1 stop23h 07mUnited Airlines
Deal found 10/27$1,711
This Gotogate deal was found by Cheapflights users on 10/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:35 pmORD - ADL
2 stops35h 10mCathay Pacific
Mon 11/177:00 pmADL - ORD
2 stops34h 25mCathay Pacific
Deal found 10/28$1,916
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2311:42 amORD - ADL
3 stops32h 48mMultiple Airlines
Sun 11/308:55 pmADL - ORD
3 stops34h 16mMultiple Airlines
Deal found 10/26$1,929
This Air Canada deal was found by Cheapflights users on 10/26. 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.
Sun 11/232:00 pmORD - ADL
3 stops31h 25mAir Canada
Sun 11/306:10 amADL - ORD
2 stops25h 01mAir Canada
Deal found 10/26$1,993
This BestPriceTravel deal was found by Cheapflights users on 10/28. 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.
Fri 12/1211:55 amORD - ADL
2 stops29h 00mQantas Airways
Fri 12/196:00 amADL - ORD
2 stops26h 03mQantas Airways
Deal found 10/28$2,059
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:48 amORD - ADL
3 stops33h 22mMultiple Airlines
Fri 12/196:05 amADL - ORD
3 stops29h 03mMultiple Airlines
Deal found 10/28$2,073

Cheap flight deals from Illinois to Adelaide

Keep the following information in mind while searching for Illinois to Adelaide flight deals. Data was last updated October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$804
(Orbitz)

Popular in

December

Cheapest in

February

Average price

$1,459
Provider with most accurate pricing for Chicago (CHI)-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Adelaide flights.
Search Deals
From Illinois to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($324 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($70 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Adelaide 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 October 28, 2025.
Use the filters below to find and compare flights from Illinois to Adelaide that are best for you.

Fly from

Illinois

Fly to

Adelaide

Route

Depart

Return

Price

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 2/23

3:40 pm-1:55 pm

2 stops29h 45m

Adelaide

Wed 3/4

6:10 am-2:41 pm

2 stops25h 01m

$804

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 2/3

1:05 pm-4:20 pm

2 stops34h 45m

Adelaide

Tue 2/24

6:10 am-2:41 pm

2 stops25h 01m

$808

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 2/23

11:05 am-9:30 am

1 stop29h 55m

Adelaide

Wed 3/4

2:55 pm-11:26 pm

1 stop25h 01m

$861

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 12/10

6:17 pm-4:25 pm

2 stops29h 38m

Adelaide

Wed 12/17

6:25 am-4:02 pm

2 stops26h 07m

$995

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 2/23

2:00 pm-1:55 pm

3 stops31h 25m

Adelaide

Wed 3/4

6:10 am-2:41 pm

2 stops25h 01m

$1,063

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 11/23

6:25 pm-2:10 pm

2 stops27h 15m

Adelaide

Sun 11/30

7:15 am-6:29 am

2 stops39h 44m

$1,137

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 12/10

3:11 pm-10:55 am

2 stops27h 14m

Adelaide

Wed 12/17

6:25 am-4:02 pm

2 stops26h 07m

$1,173

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 2/10

3:40 pm-4:25 pm

2 stops32h 15m

Adelaide

Tue 3/3

6:10 am-2:41 pm

2 stops25h 01m

$1,321

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

9:04 pm-4:25 pm

2 stops50h 51m

$1,526

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

6:25 pm-9:30 am

1 stop22h 35m

$1,615

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 11 results
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Best time to book a flight from Illinois to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Illinois 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 Illinois to Adelaide

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

Find hourly flight availability from Illinois to Adelaide. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

When flying from Illinois to Adelaide, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 46% versus a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Adelaide. 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 into for flights to Adelaide from Illinois?

    If you book a flight to Adelaide from Illinois, you will be flying to Adelaide, which is the city’s only airport. Adelaide (ADL) is located 4.1 mi from the center of Adelaide.

  • How long is the flight from Illinois to Adelaide?

    Airlines like Air Canada and United Airlines fly from Illinois to Adelaide in about 29h 55m. The time it takes to get you to your destination can typically vary by up to 4h 50m. There are 9903 mi between Illinois and Adelaide. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Illinois to Adelaide that include hotel bookings?

    Yes. In addition to deals on Illinois to Adelaide flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Adelaide?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Adelaide.

  • Can I find deals for business class flights from Illinois to Adelaide?

    Yes. Cheapflights offers flight deals from Illinois to Adelaide 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

Traveling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg

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Top 4 airlines flying from Illinois to Adelaide

Discover the top 4 airlines that operate flights from Illinois to Adelaide. 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 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$987Average$1,190FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,303Average$1,590FlexibilityNo cancel feeOn-time78%
Fiji AirwaysCheapest$1,351Average$1,438FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,885Average$2,028FlexibilityNo cancel feeOn-time69%

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