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Cheap flights from Adelaide to Illinois from $1,541

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
27 dic — 3 gen1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Adelaide to Illinois

Enter your travel dates to find the best prices.

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 27 novembre 2025.

ven 19/1207:15ADL - ORD
2 stops26h 19mUnited Airlines
ven 2/122:10ORD - ADL
1 stop42h 50mUnited Airlines
Deal found 26/11$3,416
ven 19/1211:40ADL - ORD
3 stops45h 40mMultiple Airlines
ven 2/109:34ORD - ADL
3 stops35h 36mMultiple Airlines
Deal found 26/11$4,428
ven 19/1222:00ADL - ORD
1 stop33h 00mQatar Airways
ven 2/118:50ORD - ADL
1 stop29h 45mQatar Airways
Deal found 26/11$4,921

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 27 novembre 2025.

Round-trip from

$1,530

Popular in

December

Cheapest in

March

Average price

$2,501
Air Canada
  • Air Canada
  • 18/2-22/2
  • 4 total stops
  • 63h 26m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($420 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($87 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 27 novembre 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

mer 18/2

06:10-16:38

2 stops26h 58m

Chicago O'Hare Intl

dom 22/2

11:11-13:55

3 stops34h 14m

$1,541

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mer 18/2

14:55-19:55

1 stop21h 30m

Chicago O'Hare Intl

dom 22/2

21:10-09:30

2 stops43h 50m

$1,553

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

sab 10/1

14:55-23:59

2 stops25h 34m

Chicago O'Hare Intl

sab 17/1

12:45-09:30

1 stop28h 15m

$2,771

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

sab 10/1

14:55-06:25

1 stop32h 00m

Chicago O'Hare Intl

sab 17/1

18:29-09:30

1 stop22h 31m

$3,095

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

sab 10/1

12:00-19:29

2 stops23h 59m

Chicago O'Hare Intl

sab 17/1

13:15-10:55

3 stops29h 10m

$3,204

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

mer 18/2

14:55-19:55

1 stop21h 30m

Chicago O'Hare Intl

dom 22/2

20:20-09:30

1 stop44h 40m

$3,216

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

ven 19/12

07:15-17:04

2 stops26h 19m

Chicago O'Hare Intl

ven 2/1

22:10-09:30

1 stop42h 50m

$3,416

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

ven 19/12

11:40-16:50

3 stops45h 40m

Chicago O'Hare Intl

ven 2/1

09:34-13:40

3 stops35h 36m

$4,428

Flights are sorted by cheapest return flights first.

Deals found on 25/11

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 27 novembre 2025.

It’s typically best to fly out from Adelaide to Illinois in the afternoon. Doing so could potentially save you 21% on the flight price compared to flying in the evening, which is usually more expensive.

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 27 novembre 2025.
Get a feel of what it's like to fly with Virgin Australia and Qantas Airways 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.
Virgin Australia
7.6
Good
425 reviews
Check prices

Crew

8.2

Comfort

7.5

Boarding

7.7

Overall

7.6

Food

6.4

Entertainment

6.4

Reviews

1 / 20
6.0
Good

Andrew,June 2025

MEL - CNS

We didn’t eat or drink, but feel like a sardine. No room at all.
Virgin Australia
7.6
Good
425 reviews
Virgin Australia
7.6
Good
425 reviews
Check prices

Crew

8.2

Comfort

7.5

Boarding

7.7

Overall

7.6

Food

6.4

Entertainment

6.4

Reviews

1 / 20
6.0
Good

Andrew,June 2025

MEL - CNS

We didn’t eat or drink, but feel like a sardine. No room at all.
Qantas Airways
7.5
Good
946 reviews
Virgin Australia
7.6
Good
425 reviews
Check prices

Crew

8.2

Comfort

7.5

Boarding

7.7

Overall

7.6

Food

6.4

Entertainment

6.4

Reviews

1 / 20
6.0
Good

Andrew,June 2025

MEL - CNS

We didn’t eat or drink, but feel like a sardine. No room at all.

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 $1,553, Air Canada can have you in Illinois from Adelaide in 21h 30m. There are 15937 km between Adelaide and Illinois. Both multi-stop and direct flights can be found to your destination and back.

  • 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 27 novembre 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,203Average$1,619FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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Why should you use Cheapflights to find cheap flight tickets from Adelaide to Illinois?

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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.

Can Cheapflights notify me if prices for flights from Adelaide to Illinois become cheaper?

Not ready to book yet? You can track prices for flights from Adelaide to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.

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