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Cheap flights from Adelaide to Illinois from $1,565

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
7 Sep — 14 Sep1
1 adult

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 2 September 2025.

Round-trip from

$1,565

Popular in

December

Cheapest in

April

Average price

$2,439
17/10-24/10
  • 17/10-24/10
  • 4 total stops
  • 59h 25m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($148 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($75 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 2 September 2025.

Fri 17/1006:00ADL - ORD
2 stops24h 30mMultiple Airlines
Fri 24/1015:45ORD - ADL
2 stops34h 55mMultiple Airlines
Deal found 2/9$1,565
Sat 13/1214:55ADL - ORD
1 stop24h 45mUnited Airlines
Sun 28/1222:00ORD - ADL
1 stop43h 00mUnited Airlines
Deal found 31/8$1,583
Thu 2/1020:00ADL - ORD
2 stops33h 30mMultiple Airlines
Thu 9/1008:51ORD - ADL
2 stops39h 49mMultiple Airlines
Deal found 2/9$2,019
Thu 16/1013:35ADL - ORD
2 stops27h 19mMultiple Airlines
Thu 23/1005:25ORD - ADL
2 stops39h 40mMultiple Airlines
Deal found 1/9$2,082
Thu 16/1006:00ADL - ORD
3 stops28h 54mAir Canada
Thu 23/1014:00ORD - ADL
3 stops32h 25mAir Canada
Deal found 1/9$3,035

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 2 September 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

Fri 17/10

06:00-15:00

2 stops24h 30m

Chicago O'Hare Intl

Fri 24/10

15:45-18:10

2 stops34h 55m

$1,565

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 13/12

14:55-23:10

1 stop24h 45m

Chicago O'Hare Intl

Sun 28/12

22:00-09:30

1 stop43h 00m

$1,583

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 2/10

20:00-15:00

2 stops33h 30m

Chicago O'Hare Intl

Thu 9/10

08:51-16:10

2 stops39h 49m

$2,019

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 16/10

13:35-01:24

2 stops27h 19m

Chicago O'Hare Intl

Thu 23/10

05:25-12:35

2 stops39h 40m

$2,082

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 16/10

06:00-19:24

3 stops28h 54m

Chicago O'Hare Intl

Thu 23/10

14:00-13:55

3 stops32h 25m

$3,035

Flights are sorted by cheapest return flights first.

Deals found on 2/9

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 return 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 2 September 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.

How much does it cost for a return flight from Adelaide to Illinois?

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 2 September 2025.
Get a feel of what it's like to fly with Cathay Pacific, Qantas Airways, andVirgin Australia from Adelaide to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Cathay Pacific
7.6
Good
980 reviews
Check prices

Overall

7.6

Comfort

7.6

Crew

8.1

Food

7.3

Boarding

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

anish,Aug 2025

HKG - KTM

Journey was way better than on the airbus from Toronto to Hongkong , as the economy seats were better .
Cathay Pacific
7.6
Good
980 reviews
Cathay Pacific
7.6
Good
980 reviews
Check prices

Overall

7.6

Comfort

7.6

Crew

8.1

Food

7.3

Boarding

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

anish,Aug 2025

HKG - KTM

Journey was way better than on the airbus from Toronto to Hongkong , as the economy seats were better .
Qantas Airways
7.5
Good
904 reviews
Cathay Pacific
7.6
Good
980 reviews
Check prices

Overall

7.6

Comfort

7.6

Crew

8.1

Food

7.3

Boarding

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

anish,Aug 2025

HKG - KTM

Journey was way better than on the airbus from Toronto to Hongkong , as the economy seats were better .
Virgin Australia
7.5
Good
415 reviews
Cathay Pacific
7.6
Good
980 reviews
Check prices

Overall

7.6

Comfort

7.6

Crew

8.1

Food

7.3

Boarding

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

anish,Aug 2025

HKG - KTM

Journey was way better than on the airbus from Toronto to Hongkong , as the economy seats were better .
Air Canada
7.1
Good
10,000 reviews
Cathay Pacific
7.6
Good
980 reviews
Check prices

Overall

7.6

Comfort

7.6

Crew

8.1

Food

7.3

Boarding

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

anish,Aug 2025

HKG - KTM

Journey was way better than on the airbus from Toronto to Hongkong , as the economy seats were better .

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?

    If you book a flight to Illinois from Adelaide, you will be flying from Adelaide, which is the city’s only airport. Adelaide (ADL) is located 6.6 km from the centre of Adelaide.

  • How long is the flight from Adelaide to Illinois?

    For as low as $1,583, United Airlines can have you in Illinois from Adelaide in 24h 45m. There are 15937 km between Adelaide and Illinois.

  • 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 holiday 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.

See more FAQs

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Alternative routes for Adelaide to Illinois

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Top airline flying from Adelaide to Illinois

Discover the top airline that operate flights from Adelaide to Illinois. 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 647,157 searches. Data last updated 2 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,195Average$1,608FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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Can Cheapflights find flights from Adelaide to Illinois with no change fees?

Need flexible booking options for your flight to Illinois from Adelaide? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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