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$707+ Cheap flights from Illinois to Adelaide (ADL)

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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
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 November 18, 2025.

This Orbitz deal was found by Cheapflights users on 11/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:04 pmORD - ADL
2 stops48h 31mMultiple Airlines
Tue 1/206:00 amADL - ORD
2 stops27h 12mMultiple Airlines
Deal found 11/16$2,558
This United Airlines deal was found by Cheapflights users on 11/18. 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.
Sat 12/134:10 pmORD - ADL
1 stop24h 50mUnited Airlines
Mon 12/292:55 pmADL - ORD
2 stops22h 54mUnited Airlines
Deal found 11/18$2,566
This Qantas Airways deal was found by Cheapflights users on 11/18. 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.
Tue 12/163:05 pmORD - ADL
2 stops30h 10mQantas Airways
Tue 12/307:50 amADL - ORD
2 stops32h 20mQantas Airways
Deal found 11/18$2,603
This United Airlines deal was found by Cheapflights users on 11/16. 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.
Sat 12/206:25 pmORD - ADL
1 stop22h 35mUnited Airlines
Tue 1/209:30 amADL - ORD
2 stops52h 26mUnited Airlines
Deal found 11/16$2,740
This Qantas Airways deal was found by Cheapflights users on 11/18. 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 12/136:17 pmORD - ADL
2 stops26h 53mQantas Airways
Mon 12/296:25 amADL - ORD
2 stops25h 38mQantas Airways
Deal found 11/18$2,775
This Mytrip deal was found by Cheapflights users on 11/18. 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.
Sat 12/137:05 amORD - ADL
3 stops35h 20mMultiple Airlines
Mon 12/291:15 pmADL - ORD
2 stops33h 20mMultiple Airlines
Deal found 11/18$3,240
This FlightHub deal was found by Cheapflights users on 11/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/208:15 pmORD - ADL
3 stops53h 25mAir Canada
Tue 1/206:00 amADL - ORD
3 stops30h 00mAir Canada
Deal found 11/16$3,647
This KAYAK deal was found by Cheapflights users on 11/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:50 pmORD - ADL
1 stop29h 45mJetBlue
Tue 12/3010:00 pmADL - ORD
1 stop33h 00mJetBlue
Deal found 11/18$3,884
This Ovago deal was found by Cheapflights users on 11/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:50 pmORD - ADL
1 stop29h 45mJetBlue
Mon 12/2910:00 pmADL - ORD
1 stop33h 00mJetBlue
Deal found 11/18$3,924

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 November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,122
(Orbitz)

One-way from

$707
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,567
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
One-way flight from Illinois to Adelaide
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($174 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($73 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 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 November 18, 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

Fri 1/9

9:05 pm-10:55 am

2 stops45h 20m

Adelaide

Sat 1/24

4:30 pm-2:50 pm

2 stops38h 50m

$1,821

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 1/9

9:05 pm-9:30 am

2 stops43h 55m

Adelaide

Sat 1/24

2:55 pm-5:44 am

1 stop31h 19m

$1,916

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

9:04 pm-2:05 pm

2 stops48h 31m

Adelaide

Tue 1/20

6:00 am-4:42 pm

2 stops27h 12m

$2,558

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/13

4:10 pm-9:30 am

1 stop24h 50m

Adelaide

Mon 12/29

2:55 pm-9:19 pm

2 stops22h 54m

$2,566

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 12/16

3:05 pm-1:45 pm

2 stops30h 10m

Adelaide

Tue 12/30

7:50 am-11:40 pm

2 stops32h 20m

$2,603

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 1/9

6:50 pm-5:05 pm

1 stop29h 45m

Adelaide

Sat 1/24

10:00 pm-2:30 pm

1 stop33h 00m

$2,709

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

6:25 pm-9:30 am

1 stop22h 35m

Adelaide

Tue 1/20

9:30 am-9:26 pm

2 stops52h 26m

$2,740

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 1/24

6:29 pm-9:30 am

1 stop22h 31m

$933

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 12/15

6:50 am-9:55 am

3 stops58h 35m

$1,158

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 12/15

9:00 am-9:30 am

1 stop32h 00m

$1,453

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 13 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 November 18, 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 New Zealand and United Airlines fly from Illinois to Adelaide in about 43h 55m. The time it takes to get you to your destination can typically vary by up to 1h 25m. 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$982Average$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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