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Cheap flights from Adelaide to Illinois from $1,398

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 23/7. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
4 Jun — 11 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 May 2026.

Wed 28/1010:15
ADL
-
ORD
2 stops47h 35m
Multiple Airlines
Mon 30/1120:42
ORD
-
ADL
2 stops43h 38m
Multiple Airlines
Deal found 4/5$2,271
Sun 14/606:05
ADL
-
ORD
3 stops61h 32m
Multiple Airlines
Sun 21/607:20
ORD
-
ADL
3 stops47h 10m
Multiple Airlines
Deal found 30/4$2,343
Wed 28/1011:55
ADL
-
ORD
2 stops25h 21m
Air New Zealand
Wed 2/1214:15
ORD
-
ADL
2 stops28h 10m
Air New Zealand
Deal found 4/5$2,406
Fri 24/712:05
ADL
-
ORD
2 stops25h 41m
Air New Zealand
Mon 27/717:45
ORD
-
ADL
2 stops26h 40m
Air New Zealand
Deal found 2/5$2,619
Tue 3/1109:00
ADL
-
ORD
2 stops24h 45m
Qantas Airways
Tue 17/1116:45
ORD
-
ADL
2 stops25h 40m
Qantas Airways
Deal found 4/5$2,688
Thu 23/711:50
ADL
-
ORD
2 stops26h 47m
Qantas Airways
Fri 31/719:08
ORD
-
ADL
2 stops25h 27m
Qantas Airways
Deal found 2/5$2,772
Tue 3/1106:25
ADL
-
ORD
3 stops27h 20m
Multiple Airlines
Tue 17/1118:03
ORD
-
ADL
2 stops27h 07m
Multiple Airlines
Deal found 4/5$2,773
Wed 17/618:20
ADL
-
ORD
2 stops35h 15m
Qatar Airways
Wed 24/613:44
ORD
-
ADL
2 stops35h 16m
Qatar Airways
Deal found 3/5$2,774
Mon 8/606:05
ADL
-
ORD
2 stops31h 24m
United Airlines
Mon 22/618:20
ORD
-
ADL
2 stops26h 15m
United Airlines
Deal found 3/5$2,822
Wed 28/1007:50
ADL
-
ORD
2 stops45h 35m
Cathay Pacific
Mon 30/1114:35
ORD
-
ADL
1 stop27h 25m
Cathay Pacific
Deal found 4/5$2,851

Find flight deals from Adelaide to Illinois

Keep the following information in mind while searching for Adelaide to Illinois flight deals. Data was last updated 5 May 2026.

Round-trip from

$2,271

One-way from

$1,398

Popular in

June

Cheapest in

March

Average price

$1,631
28/10-30/11
  • 28/10-30/11
  • 4 total stops
  • 91h 13m total
  • Adelaide to Illinois
Search Deals
23/7
  • 23/7
  • 2 total stops
  • 38h 22m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($370 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($154 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
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 5 May 2026.
Use the filters below to find and compare flights from Adelaide to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 14/6

06:05-05:07

3 stops61h 32m

Chicago O'Hare Intl

Sun 21/6

07:20-21:00

3 stops47h 10m

$2,343

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 28/10

19:00-08:43

3 stops29h 13m

Chicago O'Hare Intl

Wed 2/12

18:17-13:40

2 stops26h 53m

$2,774

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 28/10

19:00-08:43

3 stops29h 13m

Chicago O'Hare Intl

Mon 30/11

16:45-11:50

2 stops26h 35m

$2,792

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 8/6

06:05-22:59

2 stops31h 24m

Chicago O'Hare Intl

Mon 22/6

18:20-11:05

2 stops26h 15m

$2,822

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 14/6

06:05-18:40

2 stops27h 05m

Chicago O'Hare Intl

Sun 21/6

15:57-11:05

2 stops28h 38m

$2,859

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 6/7

06:00-18:12

2 stops26h 42m

Chicago O'Hare Intl

Mon 17/8

15:50-09:25

2 stops27h 05m

$2,909

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 31/5

19:45-13:55

2 stops56h 40m

Chicago O'Hare Intl

Sun 7/6

16:15-09:25

2 stops50h 40m

$2,934

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 16/6

18:20-15:05

2 stops35h 15m

Chicago O'Hare Intl

Tue 23/6

16:33-15:30

2 stops32h 27m

$2,972

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 6/7

12:40-00:51

3 stops26h 41m

Chicago O'Hare Intl

Mon 17/8

19:00-11:05

2 stops25h 35m

$2,985
Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 16/6

13:25-00:28

3 stops25h 33m

Chicago O'Hare Intl

Tue 23/6

18:59-11:55

2 stops26h 26m

$3,188

Flights are sorted by cheapest return flights first.

Deals found on 1/5

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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

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 5 May 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
1,030 reviews
Check prices

Overall

7.5

Comfort

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Qantas Airways
7.5
Good
1,030 reviews
Qantas Airways
7.5
Good
1,030 reviews
Check prices

Overall

7.5

Comfort

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Air Canada
7.1
Good
10,998 reviews
Qantas Airways
7.5
Good
1,030 reviews
Check prices

Overall

7.5

Comfort

7.5

Food

7.0

Entertainment

7.2

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.

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 $2,859, United Airlines can have you in Illinois from Adelaide in 27h 05m. 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

Browse thousands of different options on Cheapflights for your next trip

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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 5 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,347Average$1,879FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,385Average$1,646FlexibilityNo 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?

Cheapflights helps you search for flights from Adelaide to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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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