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Cheap flights from Adelaide to Illinois from $1,634

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
21 Jan — 28 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Adelaide to Illinois

Enter your travel dates to find the best prices.

Best flights from Adelaide to Illinois
Discover carefully curated flight deals from Adelaide to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 December 2025.

Sat 21/316:10ADL - ORD
2 stops23h 14mMultiple Airlines
Wed 22/417:30ORD - ADL
2 stops25h 25mMultiple Airlines
Deal found 20/12$1,634
Tue 13/107:15ADL - ORD
2 stops29h 40mUnited Airlines
Tue 27/116:16ORD - ADL
2 stops29h 24mUnited Airlines
Deal found 21/12$1,870
Sat 21/313:55ADL - ORD
1 stop31h 54mVirgin Australia
Wed 22/418:20ORD - ADL
2 stops26h 05mVirgin Australia
Deal found 20/12$1,905
Sat 21/306:10ADL - ORD
2 stops24h 01mAir Canada
Wed 22/414:00ORD - ADL
3 stops31h 20mAir Canada
Deal found 20/12$2,296
Thu 5/216:10ADL - ORD
2 stops24h 19mMultiple Airlines
Thu 12/216:30ORD - ADL
2 stops24h 50mMultiple Airlines
Deal found 22/12$1,643
Sat 21/313:55ADL - ORD
1 stop23h 11mUnited Airlines
Wed 22/414:15ORD - ADL
2 stops30h 10mUnited Airlines
Deal found 21/12$1,944
Wed 4/206:10ADL - ORD
2 stops25h 01mAir Canada
Sun 8/215:35ORD - ADL
2 stops38h 25mAir Canada
Deal found 19/12$2,428

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 22 December 2025.

Round-trip from

$1,634

Popular in

December

Cheapest in

March

Average price

$2,519
21/3-22/4
  • 21/3-22/4
  • 4 total stops
  • 48h 39m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($309 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($86 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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 22 December 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

Sat 21/3

16:10-23:54

2 stops23h 14m

Chicago O'Hare Intl

Wed 22/4

17:30-09:25

2 stops25h 25m

$1,634

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 5/2

16:10-23:59

2 stops24h 19m

Chicago O'Hare Intl

Thu 12/2

16:30-09:50

2 stops24h 50m

$1,643

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Tue 13/1

07:15-20:25

2 stops29h 40m

Chicago O'Hare Intl

Tue 27/1

16:16-14:10

2 stops29h 24m

$1,870

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 21/3

13:55-06:19

1 stop31h 54m

Chicago O'Hare Intl

Wed 22/4

18:20-10:55

2 stops26h 05m

$1,905

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 21/3

13:55-21:36

1 stop23h 11m

Chicago O'Hare Intl

Wed 22/4

14:15-10:55

2 stops30h 10m

$1,944

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 21/3

06:10-14:41

2 stops24h 01m

Chicago O'Hare Intl

Wed 22/4

14:00-11:50

3 stops31h 20m

$2,296

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 4/2

06:10-14:41

2 stops25h 01m

Chicago O'Hare Intl

Sun 8/2

15:35-22:30

2 stops38h 25m

$2,428

Flights are sorted by cheapest return flights first.

Deals found on 20/12

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 22 December 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 22 December 2025.
Get a feel of what it's like to fly with Virgin Australia, Qantas Airways, andAir 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.
Virgin Australia
7.6
Good
429 reviews
Check prices

Comfort

7.5

Overall

7.6

Boarding

7.7

Crew

8.2

Entertainment

6.4

Food

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
429 reviews
Virgin Australia
7.6
Good
429 reviews
Check prices

Comfort

7.5

Overall

7.6

Boarding

7.7

Crew

8.2

Entertainment

6.4

Food

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
949 reviews
Virgin Australia
7.6
Good
429 reviews
Check prices

Comfort

7.5

Overall

7.6

Boarding

7.7

Crew

8.2

Entertainment

6.4

Food

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.
Air Canada
7.1
Good
10,551 reviews
Virgin Australia
7.6
Good
429 reviews
Check prices

Comfort

7.5

Overall

7.6

Boarding

7.7

Crew

8.2

Entertainment

6.4

Food

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 $2,296, United Airlines can have you in Illinois from Adelaide in 24h 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 22 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,183Average$1,592FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,504Average$1,799FlexibilityNo 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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