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Cheap flights from Adelaide to Illinois from $1,629

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

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 16 January 2026.

Round-trip from

$1,629

Popular in

December

Cheapest in

March

Average price

$1,566
Air Canada
  • Air Canada
  • 12/2-16/2
  • 4 total stops
  • 65h 56m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($450 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($196 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 16 January 2026.

Thu 12/206:10
ADL
-
ORD
2 stops25h 01m
Air Canada
Mon 16/213:05
ORD
-
ADL
2 stops40h 55m
Air Canada
Deal found 13/1$1,629
Sun 1/320:55
ADL
-
ORD
2 stops36h 12m
Qantas Airways
Sun 8/316:44
ORD
-
ADL
2 stops27h 36m
Qantas Airways
Deal found 15/1$1,749
Sun 1/306:10
ADL
-
ORD
2 stops25h 01m
Air Canada
Sun 8/320:40
ORD
-
ADL
3 stops49h 45m
Air Canada
Deal found 15/1$1,807
Sun 1/319:55
ADL
-
ORD
2 stops35h 20m
Virgin Australia
Sun 8/321:15
ORD
-
ADL
1 stop43h 45m
Virgin Australia
Deal found 15/1$1,873
Thu 12/210:10
ADL
-
ORD
2 stops43h 15m
Cathay Pacific
Mon 16/214:35
ORD
-
ADL
1 stop27h 25m
Cathay Pacific
Deal found 14/1$2,632

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 16 January 2026.
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

Thu 12/2

06:10-14:41

2 stops25h 01m

Chicago O'Hare Intl

Mon 16/2

13:05-22:30

2 stops40h 55m

$1,629

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/3

20:55-16:37

2 stops36h 12m

Chicago O'Hare Intl

Sun 8/3

16:44-11:50

2 stops27h 36m

$1,749

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/3

06:10-14:41

2 stops25h 01m

Chicago O'Hare Intl

Sun 8/3

20:40-13:55

3 stops49h 45m

$1,807

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/3

19:55-14:45

2 stops35h 20m

Chicago O'Hare Intl

Sun 8/3

21:15-08:30

1 stop43h 45m

$1,873

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 12/2

10:10-12:55

2 stops43h 15m

Chicago O'Hare Intl

Mon 16/2

14:35-10:30

1 stop27h 25m

$2,632

Flights are sorted by cheapest return flights first.

Deals found on 13/1

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
No data available for this route at this time. Please check back soon.

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 16 January 2026.
Get a feel of what it's like to fly with Qantas Airways and Air Canada 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.
Qantas Airways
7.5
Good
971 reviews
Check prices

Overall

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Qantas Airways
7.5
Good
971 reviews
Qantas Airways
7.5
Good
971 reviews
Check prices

Overall

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Air Canada
7.1
Good
10,624 reviews
Qantas Airways
7.5
Good
971 reviews
Check prices

Overall

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

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 $1,629, Air Canada can have you in Illinois from Adelaide in 25h 01m. 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 2 airlines flying from Adelaide to Illinois

Discover the top 2 airlines 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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,170Average$1,574FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,487Average$1,779FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Adelaide to Illinois?

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

Cheapflights simply makes it quick and affordable to book flights from Adelaide to Illinois by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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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