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$551+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ADL
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$1,135
(CheapTickets)

One-way from

$551
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$1,629
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 ($545 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($105 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This CheapTickets deal was found by Cheapflights users on 6/30. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/147:05 amORD - ADL
2 stops38h 00mMultiple Airlines
Thu 8/2112:35 pmADL - ORD
2 stops31h 35mMultiple Airlines
Deal found 6/30$1,135
This BestPriceTravel deal was found by Cheapflights users on 6/30. 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.
Mon 11/31:00 pmORD - ADL
2 stops29h 25mAir New Zealand
Tue 11/1811:55 amADL - ORD
2 stops24h 05mAir New Zealand
Deal found 6/30$1,398
This BYOjet deal was found by Cheapflights users on 6/30. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:00 amORD - ADL
3 stops35h 25mAir Canada
Tue 11/187:55 pmADL - ORD
3 stops40h 05mAir Canada
Deal found 6/30$1,581
This Gotogate deal was found by Cheapflights users on 6/30. 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 11/36:55 pmORD - ADL
1 stop29h 40mQatar Airways
Tue 11/186:20 pmADL - ORD
2 stops36h 40mQatar Airways
Deal found 6/30$1,608
This Ovago deal was found by Cheapflights users on 6/29. 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.
Sun 7/273:21 pmORD - ADL
2 stops28h 29mQantas Airways
Sun 8/36:00 amADL - ORD
2 stops31h 22mQantas Airways
Deal found 6/29$1,804

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 July 1, 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

Thu 8/14

7:05 am-11:35 am

2 stops38h 00m

Adelaide

Thu 8/21

12:35 pm-5:40 am

2 stops31h 35m

$1,135

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Mon 8/4

3:40 pm-6:10 pm

2 stops36h 00m

Adelaide

Mon 8/11

6:50 pm-5:38 am

2 stops49h 18m

$1,710

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 7/4

12:45 pm-10:55 am

2 stops31h 40m

Adelaide

Thu 7/24

8:10 pm-6:55 pm

2 stops37h 15m

$1,743

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 7/27

3:21 pm-10:20 am

2 stops28h 29m

Adelaide

Sun 8/3

6:00 am-10:52 pm

2 stops31h 22m

$1,804

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 9/23

3:20 pm-7:00 pm

3 stops37h 10m

$551

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 9/23

6:30 pm-11:35 am

2 stops26h 35m

$669

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 9/23

7:20 pm-3:50 pm

1 stop30h 00m

$1,434

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 8/15

12:07 pm-4:20 pm

3 stops37h 43m

$1,566

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 July 1, 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.

Reviews of airlines servicing Adelaide

Get insights into the airlines that provide service to Adelaide. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Adelaide. Reviews last updated July 1, 2025.
Read through reviews of airlines operating flights from Illinois to Adelaide, such as Singapore Airlines, Fiji Airways, and Air New Zealand. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Singapore Airlines
8.1
Very good
1,320 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Fiji Airways
8.0
Very good
202 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Air New Zealand
8.0
Very good
486 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Qantas Airways
7.5
Good
870 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Qatar Airways
7.4
Good
3,593 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Food

7.7

Overall

8.1

Crew

8.6

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

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.

  • What are the cheapest airlines to fly from Illinois to Adelaide one-way?

    One-way options have recently been found by users for as low as $669 on Fiji Airways. Other airlines that offer cheap prices include Qatar Airways from $1,434 and Singapore Airlines from $1,566 one-way.

  • 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 Illinois?

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Top airline flying from Illinois to Adelaide

Discover the top airline 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$987Average$1,201FlexibilityNo cancel feeOn-time74%

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