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Cheap flights from Adelaide to Illinois from $639

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 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
4 Mar — 11 Mar1
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 2 February 2026.

Thu 19/306:00
ADL
-
ORD
2 stops24h 11m
Air Canada
Thu 26/315:35
ORD
-
ADL
2 stops33h 05m
Air Canada
Deal found 2/2$1,460
Thu 12/321:45
ADL
-
ORD
2 stops32h 26m
Multiple Airlines
Sat 21/315:35
ORD
-
ADL
2 stops29h 35m
Multiple Airlines
Deal found 1/2$1,573
Wed 18/314:15
ADL
-
ORD
2 stops22h 44m
United Airlines
Wed 25/321:15
ORD
-
ADL
2 stops44h 35m
United Airlines
Deal found 1/2$1,599
Wed 18/319:55
ADL
-
ORD
2 stops34h 16m
Multiple Airlines
Tue 21/415:40
ORD
-
ADL
2 stops29h 45m
Multiple Airlines
Deal found 30/1$1,664
Thu 12/321:45
ADL
-
ORD
2 stops32h 26m
Air Canada
Sat 21/313:55
ORD
-
ADL
3 stops37h 45m
Air Canada
Deal found 31/1$1,711
Wed 18/319:55
ADL
-
ORD
2 stops34h 16m
Air Canada
Tue 21/414:00
ORD
-
ADL
3 stops31h 20m
Air Canada
Deal found 30/1$1,760
Wed 18/319:55
ADL
-
ORD
2 stops34h 16m
Air Canada
Wed 25/318:25
ORD
-
ADL
3 stops54h 15m
Air Canada
Deal found 1/2$1,809
Wed 18/314:15
ADL
-
ORD
1 stop24h 53m
Virgin Australia
Tue 21/416:40
ORD
-
ADL
2 stops27h 45m
Virgin Australia
Deal found 30/1$1,840
Thu 19/306:10
ADL
-
ORD
2 stops26h 25m
Virgin Australia
Thu 26/319:50
ORD
-
ADL
1 stop22h 00m
Virgin Australia
Deal found 2/2$1,909
Thu 12/306:10
ADL
-
ORD
2 stops24h 15m
United Airlines
Sat 21/316:35
ORD
-
ADL
1 stop24h 25m
United Airlines
Deal found 1/2$1,910

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 2 February 2026.

Round-trip from

$1,460

One-way from

$639

Popular in

December

Cheapest in

March

Average price

$1,520
Air Canada
  • Air Canada
  • 19/3-26/3
  • 4 total stops
  • 57h 16m total
  • Adelaide to Illinois
Search Deals
14/3
  • 14/3
  • 2 total stops
  • 31h 04m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($415 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($180 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 2 February 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 19/3

06:00-14:41

2 stops24h 11m

Chicago O'Hare Intl

Thu 26/3

13:55-16:10

3 stops34h 45m

$1,471

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 12/3

21:45-14:41

2 stops32h 26m

Chicago O'Hare Intl

Sat 21/3

15:35-12:40

2 stops29h 35m

$1,573

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 18/3

14:15-20:15

1 stop21h 30m

Chicago O'Hare Intl

Wed 25/3

21:15-09:20

1 stop44h 35m

$1,599

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 18/3

19:55-14:41

2 stops34h 16m

Chicago O'Hare Intl

Tue 21/4

15:40-11:55

2 stops29h 45m

$1,664

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 12/3

21:45-14:41

2 stops32h 26m

Chicago O'Hare Intl

Sat 21/3

13:55-19:10

3 stops37h 45m

$1,711

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 18/3

19:55-14:41

2 stops34h 16m

Chicago O'Hare Intl

Tue 21/4

14:00-11:50

3 stops31h 20m

$1,760

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 18/3

19:55-14:41

2 stops34h 16m

Chicago O'Hare Intl

Wed 25/3

18:25-16:10

3 stops54h 15m

$1,809

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 18/3

14:15-23:38

1 stop24h 53m

Chicago O'Hare Intl

Tue 21/4

16:40-10:55

2 stops27h 45m

$1,840

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Thu 19/3

06:10-17:05

2 stops26h 25m

Chicago O'Hare Intl

Thu 26/3

19:50-09:20

1 stop22h 00m

$1,909

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 14/3

13:15-04:49

2 stops31h 04m

$657

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Showing 1-10 of 15 results
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
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 2 February 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
984 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Jan 2026

WYA - ADL

Bad. Second time in a week the flight got delayed. This time for 1.5 hours. Hopefully this is not going to be a pattern.
Qantas Airways
7.5
Good
984 reviews
Qantas Airways
7.5
Good
984 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Jan 2026

WYA - ADL

Bad. Second time in a week the flight got delayed. This time for 1.5 hours. Hopefully this is not going to be a pattern.
Air Canada
7.1
Good
10,676 reviews
Qantas Airways
7.5
Good
984 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Jan 2026

WYA - ADL

Bad. Second time in a week the flight got delayed. This time for 1.5 hours. Hopefully this is not going to be a pattern.

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 $1,599, Air Canada can have you in Illinois from Adelaide in 21h 30m. 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,123Average$1,512FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,428Average$1,708FlexibilityNo 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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