Find flights
When to book
FAQs

Cheap flights from Adelaide to Illinois from $1,154

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
11 Aug — 18 Aug1
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 12 July 2026.

Mon 24/810:10
ADL
-
ORD
2 stops24h 02m
Qantas Airways
Mon 31/815:54
ORD
-
ADL
2 stops27h 01m
Qantas Airways
Deal found 10/7$1,678
Tue 25/806:00
ADL
-
ORD
2 stops24h 24m
Qantas Airways
Thu 1/1018:00
ORD
-
ADL
2 stops26h 35m
Qantas Airways
Deal found 11/7$2,318
Tue 21/718:30
ADL
-
ORD
2 stops35h 59m
Multiple Airlines
Thu 30/717:10
ORD
-
ADL
2 stops25h 45m
Multiple Airlines
Deal found 11/7$2,364
Mon 24/813:25
ADL
-
ORD
3 stops25h 33m
Multiple Airlines
Mon 31/817:16
ORD
-
ADL
2 stops25h 39m
Multiple Airlines
Deal found 10/7$2,579
Sun 23/820:00
ADL
-
ORD
2 stops35h 35m
United Airlines
Sun 30/821:28
ORD
-
ADL
2 stops47h 07m
United Airlines
Deal found 9/7$2,824
Tue 4/818:55
ADL
-
ORD
2 stops33h 55m
Multiple Airlines
Mon 10/816:00
ORD
-
ADL
2 stops35h 35m
Multiple Airlines
Deal found 7/7$2,828
Tue 25/820:00
ADL
-
ORD
3 stops50h 30m
Air Canada
Thu 1/1015:40
ORD
-
ADL
2 stops33h 45m
Air Canada
Deal found 11/7$2,996

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 12 July 2026.

Round-trip from

$1,678

One-way from

$1,154

Popular in

December

Cheapest in

May

Average price

$2,361
Qantas Airways
  • Qantas Airways
  • 24/8-31/8
  • 4 total stops
  • 51h 03m total
  • Adelaide to Illinois
Search Deals
26/11
  • 26/11
  • 3 total stops
  • 38h 20m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 36% potential increase in price ($1,729 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($314 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 12 July 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
Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 24/8

13:25-00:28

3 stops25h 33m

Chicago O'Hare Intl

Mon 31/8

17:16-09:25

2 stops25h 39m

$2,579

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 4/8

18:55-14:20

2 stops33h 55m

Chicago O'Hare Intl

Mon 10/8

16:00-18:05

2 stops35h 35m

$2,828

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 4/8

22:00-21:58

2 stops38h 28m

Chicago O'Hare Intl

Mon 10/8

19:20-15:00

1 stop29h 10m

$3,131

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 6/8

13:30-14:54

2 stops39h 54m

Chicago O'Hare Intl

Mon 10/8

14:57-09:25

2 stops27h 58m

$3,166

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 6/8

22:00-16:58

2 stops57h 28m

Chicago O'Hare Intl

Mon 10/8

19:20-15:00

1 stop29h 10m

$3,241

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 24/8

20:00-08:00

3 stops50h 30m

Chicago O'Hare Intl

Mon 31/8

14:15-13:55

3 stops33h 10m

$3,347

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 23/8

22:00-15:05

1 stop31h 35m

Chicago O'Hare Intl

Sun 30/8

19:20-15:00

1 stop29h 10m

$4,008

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 23/8

06:00-15:45

2 stops48h 15m

Chicago O'Hare Intl

Sun 30/8

20:35-20:05

1 stop33h 00m

$4,098
Cheapest one-way

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 26/11

13:15-11:05

3 stops38h 20m

$1,154
Fastest single journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 26/11

22:00-14:30

1 stop33h 00m

$2,147

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Sorted by cheapest first

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.

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 $1,678, Qantas Airways can have you in Illinois from Adelaide in 24h 02m. 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.