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$518+ Cheap flights from Adelaide (ADL) to Illinois

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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Cheap flight deals from Adelaide to Illinois

Keep the following information in mind while searching for Adelaide to Illinois flight deals. Data was last updated julio 31, 2025.

Round-trip from

$937
(BYOjet)

One-way from

$518
(Kiwi.com)

Popular in

September

Cheapest in

April

Average price

$1,522
From Adelaide to Illinois
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One-way flight from Adelaide to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($220 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($44 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 Adelaide to Illinois

Cheapest flights from Adelaide to Illinois
Explore the most affordable flight options available from Adelaide to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This BYOjet deal was found by Cheapflights users on 7/30. 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.
mar. 8/126:10 amADL - ORD
2 stops23h 14mMultiple Airlines
mar. 9/167:41 pmORD - ADL
2 stops32h 39mMultiple Airlines
Deal found 7/30$937
This BYOjet deal was found by Cheapflights users on 7/29. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/126:50 pmADL - ORD
2 stops34h 34mAir Canada
mar. 9/163:40 pmORD - ADL
2 stops39h 55mAir Canada
Deal found 7/29$948
This BYOjet deal was found by Cheapflights users on 7/31. 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.
dom. 9/149:40 pmADL - ORD
2 stops37h 39mQatar Airways
dom. 9/217:20 pmORD - ADL
1 stop30h 00mQatar Airways
Deal found 7/31$1,699

Cheapflights Fare Finder

 
Customize your flight search to find flights from Adelaide to Illinois 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 julio 31, 2025.
Use the filters below to find and compare flights from Adelaide to Illinois that are best for you.

Fly from

Adelaide

Fly to

Illinois

Route

Depart

Return

Price

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mar. 8/12

6:10 am-2:54 pm

2 stops23h 14m

Chicago O'Hare Intl

mar. 9/16

7:41 pm-6:50 pm

2 stops32h 39m

$937

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mar. 8/12

6:50 pm-2:54 pm

2 stops34h 34m

Chicago O'Hare Intl

mar. 9/16

3:40 pm-10:05 pm

2 stops39h 55m

$948

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

dom. 9/14

9:40 pm-8:49 pm

2 stops37h 39m

Chicago O'Hare Intl

dom. 9/21

7:20 pm-3:50 pm

1 stop30h 00m

$1,699

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mié. 10/15

6:25 am-2:50 pm

3 stops47h 55m

$518

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

lun. 12/15

2:55 pm-9:08 pm

2 stops22h 43m

$1,252

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mié. 10/15

9:40 pm-3:05 pm

1 stop32h 55m

$1,348

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Adelaide to Illinois

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

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

Find hourly flight availability from Adelaide to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 31, 2025.

When flying from Adelaide to Illinois, 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated julio 31, 2025.
Read reviews from past customers who have flown Qatar Airways, United Airlines, and Air Canada from Adelaide to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Qatar Airways
7.4
Good
3,609 reviews

Comfort

7.4

Overall

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

preeti,Jan 2025

DOH - PHL

Can improve a lot from food to crew training to entertainment etc.
Qatar Airways
7.4
Good
3,609 reviews
Qatar Airways
7.4
Good
3,609 reviews

Comfort

7.4

Overall

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

preeti,Jan 2025

DOH - PHL

Can improve a lot from food to crew training to entertainment etc.
United Airlines
7.4
Good
8,900 reviews
Qatar Airways
7.4
Good
3,609 reviews

Comfort

7.4

Overall

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

preeti,Jan 2025

DOH - PHL

Can improve a lot from food to crew training to entertainment etc.
Air Canada
7.1
Good
9,851 reviews
Qatar Airways
7.4
Good
3,609 reviews

Comfort

7.4

Overall

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

preeti,Jan 2025

DOH - PHL

Can improve a lot from food to crew training to entertainment etc.

Related info for your journey

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

    Located just 4.1 mi from the city center, Adelaide (ADL) is the airport most travelers will use when flying to Illinois from Adelaide.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Adelaide to Illinois 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 Adelaide to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Adelaide to Illinois (average of $245). Flying from Adelaide to Illinois in March is currently the most expensive (average of $321). 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.

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