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$615+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
Sep 8 — Sep 151
Mon 9/8
Mon 9/15
1 adult, Economy
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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 September 3, 2025.

Round-trip from

$1,159
(Trip.com)

One-way from

$615
(oojo)

Popular in

November

Cheapest in

February

Average price

$1,548
From Illinois to Adelaide
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One-way flight from Illinois to Adelaide
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Highest demand for flights based on searches. 26% potential increase in price ($543 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($104 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 3, 2025.

This Trip.com deal was found by Cheapflights users on 9/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:25 amORD - ADL
2 stops37h 40mMultiple Airlines
Sat 11/81:15 pmADL - ORD
2 stops26h 15mMultiple Airlines
Deal found 9/1$1,159
This FlightHub deal was found by Cheapflights users on 9/2. 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 10/257:01 pmORD - ADL
2 stops26h 04mFiji Airways
Sat 11/81:15 pmADL - ORD
2 stops22h 55mFiji Airways
Deal found 9/2$1,294
This FlightHub deal was found by Cheapflights users on 9/2. 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 10/187:01 pmORD - ADL
2 stops26h 04mFiji Airways
Sat 11/81:15 pmADL - ORD
2 stops22h 55mFiji Airways
Deal found 9/2$1,466
This oojo deal was found by Cheapflights users on 9/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:21 pmORD - ADL
2 stops29h 04mAir New Zealand
Thu 11/68:55 pmADL - ORD
2 stops39h 05mAir New Zealand
Deal found 9/1$1,573
This Gotogate deal was found by Cheapflights users on 9/2. 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.
Mon 11/173:40 pmORD - ADL
2 stops29h 45mMultiple Airlines
Mon 12/18:00 pmADL - ORD
2 stops35h 11mMultiple Airlines
Deal found 9/2$1,584
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/183:45 pmORD - ADL
2 stops35h 55mMultiple Airlines
Mon 11/107:55 pmADL - ORD
2 stops35h 16mMultiple Airlines
Deal found 9/2$1,628
This KAYAK deal was found by Cheapflights users on 9/2. 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.
Sat 10/183:40 pmORD - ADL
2 stops49h 05mAir New Zealand
Sun 11/911:55 amADL - ORD
2 stops29h 34mAir New Zealand
Deal found 9/2$1,636
This Air Canada deal was found by Cheapflights users on 9/2. 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.
Mon 11/1711:15 amORD - ADL
3 stops34h 10mAir Canada
Mon 12/16:55 pmADL - ORD
2 stops36h 16mAir Canada
Deal found 9/2$1,644
This Expedia deal was found by Cheapflights users on 9/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/193:45 pmORD - ADL
2 stops33h 25mMultiple Airlines
Mon 11/106:00 amADL - ORD
2 stops25h 11mMultiple Airlines
Deal found 9/1$1,655
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:01 pmORD - ADL
2 stops26h 04mMultiple Airlines
Sat 11/86:00 amADL - ORD
3 stops30h 00mMultiple Airlines
Deal found 9/2$1,679
This Orbitz deal was found by Cheapflights users on 9/2. 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 10/183:45 pmORD - ADL
2 stops35h 55mMultiple Airlines
Sun 11/96:00 amADL - ORD
2 stops25h 11mMultiple Airlines
Deal found 9/2$1,683

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 September 3, 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

Sat 10/18

7:25 am-12:35 pm

2 stops37h 40m

Adelaide

Sat 11/8

1:15 pm-11:00 pm

2 stops26h 15m

$1,159

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 10/25

7:01 pm-12:35 pm

2 stops26h 04m

Adelaide

Sat 11/8

1:15 pm-7:40 pm

2 stops22h 55m

$1,294

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 11/20

8:14 pm-10:55 am

2 stops46h 11m

Adelaide

Fri 12/5

11:55 am-8:25 pm

2 stops25h 00m

$1,466

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 10/18

7:01 pm-12:35 pm

2 stops26h 04m

Adelaide

Sat 11/8

1:15 pm-7:40 pm

2 stops22h 55m

$1,466

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 10/31

2:21 pm-10:55 am

2 stops29h 04m

Adelaide

Thu 11/6

8:55 pm-7:30 pm

2 stops39h 05m

$1,573

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 11/17

3:40 pm-1:55 pm

2 stops29h 45m

Adelaide

Mon 12/1

8:00 pm-2:41 pm

2 stops35h 11m

$1,584

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 10/18

3:45 pm-7:10 pm

2 stops35h 55m

Adelaide

Mon 11/10

7:55 pm-2:41 pm

2 stops35h 16m

$1,628

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 10/18

3:40 pm-8:15 am

2 stops49h 05m

Adelaide

Sun 11/9

11:55 am-12:59 am

2 stops29h 34m

$1,636

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 11/18

6:03 pm-12:15 pm

2 stops25h 42m

$615

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 11/15

10:00 am-8:45 am

3 stops54h 15m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 16 results
1
2

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 September 3, 2025.

When flying from Illinois to Adelaide, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Illinois to Adelaide?

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 Fiji Airways fly from Illinois to Adelaide in about 26h 04m. The time it takes to get you to your destination can typically vary by up to . There are 9903 mi between Illinois and Adelaide.

  • 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.

  • What is the cheapest month to book a flight from Illinois to Adelaide?

    Currently, August is the cheapest month in which you can book a flight from Illinois to Adelaide (average of $1,214). Flying from Illinois to Adelaide in December is currently the most expensive (average of $2,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Adelaide?

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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Illinois to Adelaide

Discover the top 2 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 September 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$987Average$1,097FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,303Average$1,422FlexibilityNo cancel feeOn-time78%

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