Find flights
When to book
Airlines
FAQs

Cheap flights from Adelaide to Illinois from $1,914

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — ORD
23 Apr — 30 Apr1
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 18 April 2025.

Round-trip from

$2,408

Popular in

September

Cheapest in

April

Average price

$1,562
Singapore Airlines
  • Singapore Airlines
  • 6/6-24/9
  • 4 total stops
  • 81h 53m total
  • Adelaide to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($524 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 April 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 18 April 2025.

Wed 17/1206:00ADL - ORD
2 stops24h 45mQantas Airways
Sat 17/116:45ORD - ADL
2 stops26h 15mQantas Airways
Deal found 16/4$1,914
Fri 6/617:35ADL - ORD
2 stops37h 57mSingapore Airlines
Wed 24/920:59ORD - ADL
2 stops43h 56mSingapore Airlines
Deal found 17/4$2,408
Sun 1/619:00ADL - ORD
2 stops57h 55mCathay Pacific
Sun 8/616:00ORD - ADL
2 stops57h 05mCathay Pacific
Deal found 17/4$2,592
Sun 1/606:25ADL - ORD
3 stops38h 47mMultiple Airlines
Sun 8/615:35ORD - ADL
2 stops29h 45mMultiple Airlines
Deal found 17/4$2,889
Wed 17/1214:55ADL - ORD
2 stops22h 48mUnited Airlines
Thu 15/109:05ORD - ADL
1 stop31h 55mUnited Airlines
Deal found 16/4$3,068
Sun 1/621:40ADL - ORD
2 stops38h 44mQatar Airways
Sun 8/619:20ORD - ADL
1 stop30h 00mQatar Airways
Deal found 17/4$3,209
Sat 20/1213:15ADL - ORD
2 stops24h 34mFiji Airways
Sat 17/117:40ORD - ADL
2 stops26h 05mFiji Airways
Deal found 16/4$3,575
Fri 19/1207:15ADL - ORD
2 stops39h 23mVirgin Australia
Sat 17/114:35ORD - ADL
2 stops30h 50mVirgin Australia
Deal found 16/4$3,601
Sun 1/620:00ADL - ORD
3 stops38h 00mAir Canada
Sun 8/613:01ORD - ADL
3 stops32h 19mAir Canada
Deal found 16/4$3,729
Sat 20/1222:40ADL - ORD
1 stop32h 45mEmirates
Thu 15/119:45ORD - ADL
1 stop32h 35mEmirates
Deal found 16/4$4,688

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 18 April 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

Fri 6/6

17:35-17:02

2 stops37h 57m

Chicago O'Hare Intl

Wed 24/9

20:59-07:25

2 stops43h 56m

$2,408

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/6

11:00-23:59

2 stops27h 29m

Chicago O'Hare Intl

Sun 8/6

20:36-12:05

2 stops48h 59m

$2,477

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/6

19:00-14:25

2 stops57h 55m

Chicago O'Hare Intl

Sun 8/6

16:00-15:35

2 stops57h 05m

$2,592

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/6

06:25-06:42

3 stops38h 47m

Chicago O'Hare Intl

Sun 8/6

15:35-11:50

2 stops29h 45m

$2,889

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/6

21:40-21:54

2 stops38h 44m

Chicago O'Hare Intl

Sun 8/6

19:20-15:50

1 stop30h 00m

$3,209

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sun 1/6

20:00-19:30

3 stops38h 00m

Chicago O'Hare Intl

Sun 8/6

13:01-11:50

3 stops32h 19m

$3,729

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 28/6

21:50-15:45

1 stop32h 25m

Chicago O'Hare Intl

Thu 17/7

20:35-20:05

1 stop33h 00m

$4,776

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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 18 April 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 18 April 2025.
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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
1,288 reviews
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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.
Emirates
8.0
Very Good
3,200 reviews
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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
820 reviews
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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.
Cathay Pacific
7.5
Good
849 reviews
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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
3,554 reviews
Singapore Airlines
8.1
Very Good
1,288 reviews
Check prices

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Overall

8.1

Crew

8.6

Food

7.7

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

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.

Alternative routes for Adelaide to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Adelaide to Los Angeles flights
Adelaide to Dallas/Fort Worth flights
Adelaide to Seattle flights
Adelaide to O'Hare Intl flights
Adelaide to San Francisco flights
Adelaide to John F Kennedy Intl flights
Adelaide to Newark flights
Adelaide to Honolulu flights
Adelaide to Miami flights
Adelaide to LaGuardia flights
Adelaide to Atlanta flights
Adelaide to Las Vegas flights
Adelaide to San Jose flights
Adelaide to Philadelphia flights
Adelaide to Portland flights
Adelaide to Boston flights
Adelaide to Fort Lauderdale flights
Adelaide to Hobby flights
Adelaide to Kahului flights
Adelaide to Minneapolis flights
Adelaide to Richmond flights
Adelaide to Reno flights
Adelaide to George Bush Intcntl flights
Adelaide to Salt Lake City flights
Adelaide to Tampa flights

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 18 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,229Average$1,655FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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.
Site
©2025 Cheapflights