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Cheap flights from Adelaide to Illinois from $1,254

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 16/8. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
9 Jul — 16 Jul1
1 adult

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 4 July 2025.

Round-trip from

$1,654

One-way from

$1,254

Popular in

September

Cheapest in

April

Average price

$2,307
Air New Zealand
  • Air New Zealand
  • 20/10-18/11
  • 4 total stops
  • 55h 43m total
  • Adelaide to Illinois
Search Deals
American Airlines
  • American Airlines
  • 16/8
  • 2 total stops
  • 41h 40m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($511 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($103 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Adelaide to Illinois

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 4 July 2025.

Mon 20/1011:55ADL - ORD
2 stops24h 00mAir New Zealand
Tue 18/1110:42ORD - ADL
2 stops31h 43mAir New Zealand
Deal found 1/7$1,654
Mon 20/1006:00ADL - ORD
3 stops28h 59mAir Canada
Tue 18/1115:40ORD - ADL
2 stops34h 00mAir Canada
Deal found 1/7$2,206
Sat 16/806:00ADL - ORD
2 stops24h 25mQantas Airways
Sat 23/815:12ORD - ADL
2 stops27h 43mQantas Airways
Deal found 2/7$2,227
Sat 16/821:40ADL - ORD
2 stops38h 12mQatar Airways
Sat 23/819:20ORD - ADL
1 stop30h 00mQatar Airways
Deal found 2/7$3,048
Mon 20/1019:00ADL - ORD
2 stops34h 55mMultiple Airlines
Tue 18/1114:40ORD - ADL
2 stops32h 15mMultiple Airlines
Deal found 1/7$4,029
Mon 20/1018:35ADL - ORD
2 stops37h 58mSingapore Airlines
Tue 18/1106:45ORD - ADL
3 stops42h 05mSingapore Airlines
Deal found 1/7$4,356

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 4 July 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

Mon 20/10

11:55-20:25

2 stops24h 00m

Chicago O'Hare Intl

Tue 18/11

10:42-10:55

2 stops31h 43m

$1,654

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 20/10

06:00-19:29

3 stops28h 59m

Chicago O'Hare Intl

Tue 18/11

15:40-18:10

2 stops34h 00m

$2,206

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 16/8

06:00-15:55

2 stops24h 25m

Chicago O'Hare Intl

Sat 23/8

15:12-09:25

2 stops27h 43m

$2,227

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 16/8

21:40-21:22

2 stops38h 12m

Chicago O'Hare Intl

Sat 23/8

19:20-15:50

1 stop30h 00m

$3,048

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 20/10

19:00-14:25

2 stops34h 55m

Chicago O'Hare Intl

Tue 18/11

14:40-15:25

2 stops32h 15m

$4,029

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 20/10

18:35-17:03

2 stops37h 58m

Chicago O'Hare Intl

Tue 18/11

06:45-17:20

3 stops42h 05m

$4,356

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 16/8

12:45-15:55

2 stops41h 40m

$1,254

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 16/8

06:00-19:12

3 stops27h 42m

$2,151

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 16/8

11:40-15:05

1 stop41h 55m

$2,351

Flights are sorted by cheapest return flights first.

Deals found on 2/7

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 4 July 2025.

When flying from Adelaide to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 4 July 2025.
Get a feel of what it's like to fly with Singapore Airlines, Air New Zealand, andQantas 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.
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Singapore Airlines
8.1
Very Good
1,320 reviews
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Air New Zealand
8.0
Very Good
484 reviews
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Qantas Airways
7.5
Good
868 reviews
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Qatar Airways
7.4
Good
3,588 reviews
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
American Airlines
7.2
Good
10,000 reviews
Singapore Airlines
8.1
Very Good
1,320 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Food

7.7

Overall

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

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.

  • 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 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,191Average$1,603FlexibilityNo cancel feeOn-time74%
Search Qantas Airways 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?

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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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