HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$1,078+ 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Adelaide with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 9, 2025.

This FlightHub deal was found by Cheapflights users on 12/8. 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.
Tue 12/161:15 pmORD - ADL
2 stops29h 30mQantas Airways
Tue 12/306:35 amADL - ORD
2 stops33h 35mQantas Airways
Deal found 12/8$2,592
This Ovago deal was found by Cheapflights users on 12/7. 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.
Tue 12/167:45 pmORD - ADL
1 stop32h 35mEmirates
Tue 12/3010:40 pmADL - ORD
1 stop32h 45mEmirates
Deal found 12/7$3,676
This oojo deal was found by Cheapflights users on 12/7. 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.
Tue 12/166:50 pmORD - ADL
2 stops35h 05mQatar Airways
Tue 12/3010:00 pmADL - ORD
1 stop33h 00mQatar Airways
Deal found 12/7$3,690
This Singapore Airlines deal was found by Cheapflights users on 12/7. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:00 amORD - ADL
3 stops41h 50mMultiple Airlines
Tue 12/3010:15 amADL - ORD
3 stops51h 49mMultiple Airlines
Deal found 12/7$4,234
This FlightHub deal was found by Cheapflights users on 12/7. 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.
Tue 12/162:00 pmORD - ADL
3 stops31h 25mAir Canada
Tue 12/306:55 pmADL - ORD
2 stops41h 29mAir Canada
Deal found 12/7$4,556

Find flight deals from Illinois to Adelaide

Keep the following information in mind while searching for Illinois to Adelaide flight deals. Data was last updated December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,078
(Air Canada)

Popular in

December

Cheapest in

February

Average price

$2,298
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. 7% potential increase in price ($129 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($76 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 9, 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 1/23

3:35 pm-8:45 pm

2 stops36h 40m

Adelaide

Fri 1/30

6:10 am-2:41 pm

2 stops25h 01m

$1,078

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 1/22

6:40 pm-1:45 pm

2 stops26h 35m

Adelaide

Thu 1/29

7:05 am-2:57 pm

2 stops24h 22m

$1,274

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 2/25

3:35 pm-10:30 pm

2 stops38h 25m

Adelaide

Sun 3/1

6:55 pm-2:41 pm

2 stops36h 16m

$1,291

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 2/25

2:35 pm-10:30 am

1 stop27h 25m

Adelaide

Sun 3/1

12:00 pm-12:55 pm

1 stop41h 25m

$1,864

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 12/16

1:15 pm-11:15 am

2 stops29h 30m

$1,536

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

9:04 pm-5:45 pm

2 stops52h 11m

$1,594

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 12/20

10:35 am-9:30 am

2 stops30h 25m

$1,615

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 12/19

10:00 pm-9:30 am

2 stops43h 00m

$1,621

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

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 December 9, 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 Qantas Airways fly from Illinois to Adelaide in about 26h 35m. The time it takes to get you to your destination can typically vary by up to 10h 05m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$982Average$1,158FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,303Average$1,534FlexibilityNo cancel feeOn-time78%
Fiji AirwaysCheapest$1,351Average$1,438FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,673Average$2,028FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.