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Cheap flights from Australia to Illinois from $735

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
9 Apr — 16 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Australia to Illinois
Explore the most affordable flight options available from Australia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 March 2026.

Mon 20/409:45
MEL
-
STL
1 stop29h 12m
American Airlines
Mon 27/414:37
STL
-
MEL
2 stops25h 08m
American Airlines
Deal found 6/3$1,281
Sun 19/413:15
SYD
-
ORD
2 stops31h 20m
Multiple Airlines
Sun 26/405:15
ORD
-
SYD
2 stops39h 35m
Multiple Airlines
Deal found 5/3$1,284
Tue 17/308:40
BNE
-
ORD
2 stops42h 45m
American Airlines
Wed 1/409:25
ORD
-
BNE
1 stop28h 35m
American Airlines
Deal found 6/3$1,306
Wed 25/310:30
MEL
-
STL
2 stops22h 19m
United Airlines
Sun 29/318:05
STL
-
MEL
2 stops46h 25m
United Airlines
Deal found 5/3$1,345
Wed 27/513:25
MEL
-
ORD
2 stops30h 58m
Multiple Airlines
Fri 5/612:44
ORD
-
MEL
2 stops32h 21m
Multiple Airlines
Deal found 5/3$1,385
Mon 25/510:00
BNE
-
ORD
1 stop34h 40m
Air Canada
Mon 8/615:40
ORD
-
BNE
1 stop24h 25m
Air Canada
Deal found 7/3$1,390
Tue 21/410:00
BNE
-
ORD
1 stop25h 15m
Air Canada
Tue 28/408:40
ORD
-
BNE
2 stops31h 25m
Air Canada
Deal found 7/3$1,417
Mon 1/613:30
MEL
-
ORD
2 stops30h 53m
Multiple Airlines
Wed 10/612:44
ORD
-
MEL
2 stops32h 16m
Multiple Airlines
Deal found 9/3$1,418
Sun 10/510:00
BNE
-
ORD
2 stops21h 35m
Air Canada
Sun 24/515:40
ORD
-
BNE
1 stop24h 25m
Air Canada
Deal found 7/3$1,432
Thu 23/410:00
BNE
-
ORD
2 stops37h 00m
Air Canada
Thu 30/415:45
ORD
-
BNE
2 stops48h 20m
Air Canada
Deal found 9/3$1,445
Mon 11/513:15
SYD
-
ORD
2 stops31h 35m
Multiple Airlines
Mon 1/612:44
ORD
-
SYD
2 stops32h 21m
Multiple Airlines
Deal found 8/3$1,445
Fri 5/611:55
SYD
-
ORD
2 stops26h 20m
Air New Zealand
Fri 19/616:30
ORD
-
SYD
2 stops27h 10m
Air New Zealand
Deal found 5/3$1,447

Find flight deals from Australia to Illinois

Keep the following information in mind while searching for Australia to Illinois flight deals. Data was last updated 10 March 2026.

Round-trip from

$1,281

One-way from

$735

Popular in

December

Cheapest in

August

Average price

$1,583
American Airlines
  • American Airlines
  • 20/4-27/4
  • 3 total stops
  • 54h 20m total
  • Australia to Illinois
Search Deals
19/8
  • 19/8
  • 3 total stops
  • 48h 33m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Australia 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 10 March 2026.
Use the filters below to find and compare flights from Australia to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 20/4

14:05-23:57

2 stops24h 52m

Lambert-St Louis

Mon 27/4

14:37-06:45

2 stops25h 08m

$1,323

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 25/3

10:30-16:49

2 stops22h 19m

Lambert-St Louis

Sun 29/3

18:05-08:30

2 stops46h 25m

$1,345

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 25/5

10:00-09:05

2 stops38h 05m

Chicago O'Hare Intl

Mon 8/6

15:40-07:05

1 stop24h 25m

$1,411

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Wed 22/4

10:00-00:30

2 stops29h 30m

Chicago O'Hare Intl

Sun 26/4

18:01-07:05

2 stops46h 04m

$1,476

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 20/4

10:00-14:55

2 stops43h 55m

Chicago O'Hare Intl

Mon 27/4

15:40-07:05

1 stop24h 25m

$1,556

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Mon 20/4

21:20-20:15

2 stops37h 25m

Chicago O'Hare Intl

Mon 27/4

14:00-11:50

3 stops31h 20m

$1,562

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:10-23:56

1 stop29h 46m

Lambert-St Louis

Sun 31/5

14:37-07:05

2 stops25h 28m

$1,580

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 23/3

12:00-05:57

1 stop33h 57m

Chicago O'Hare Intl

Wed 1/4

16:44-06:45

1 stop22h 01m

$1,583

MelbourneChicago

MEL - MDW

MELMDW

Melbourne

Wed 22/4

10:00-22:28

2 stops27h 28m

Chicago Midway

Wed 29/4

14:12-07:50

2 stops26h 38m

$1,586

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 20/4

20:35-05:47

1 stop24h 12m

Chicago O'Hare Intl

Mon 27/4

16:30-05:00

1 stop21h 30m

$1,587

Flights are sorted by cheapest return flights first.

Deals found on 7/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight from Australia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Australia 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 Australia to Illinois

What is the cheapest month to book a flight from Australia to Illinois?

Currently, April is the cheapest month in which you can book a flight from Australia to Illinois (average of $951). Flying from Australia to Illinois in December is currently the most expensive (average of $1,511). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 10 March 2026.
Read reviews from past customers who have flown with Air New Zealand,Qantas Airways, andUnited Airlines from Australia to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air New Zealand
8.0
Very Good
608 reviews
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Qantas Airways
7.5
Good
1,002 reviews
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
United Airlines
7.4
Good
9,409 reviews
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
American Airlines
7.1
Good
11,414 reviews
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air Canada
7.1
Good
10,800 reviews
Air New Zealand
8.0
Very Good
608 reviews
Check prices

Food

7.4

Comfort

8.0

Entertainment

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.

Related info for your journey

Find useful and relevant information for your journey from Australia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Australia to Illinois?

    Airlines like American Airlines, United Airlines, and Air Canada fly from Australia to Illinois in about 22h 19m. The time it takes to get you to your destination can typically vary by up to 15h 46m. There are 15255 km between Australia and Illinois. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Australia to Illinois one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $181. Qantas Airways flights start at $616 while deals on Air Canada start at $751 one-way.

  • Can I find deals for flights from Australia to Illinois that include hotel bookings?

    Yes. In addition to deals on Australia to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Australia to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Australia to Illinois.

  • Can I find deals for business class flights from Australia to Illinois?

    Yes. Cheapflights offers flight deals from Australia 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.

  • What is the cheapest month to book a flight from Australia to Illinois?

    Currently, April is the cheapest month in which you can book a flight from Australia to Illinois (average of $951). Flying from Australia to Illinois in December is currently the most expensive (average of $1,511). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

Top 9 airlines flying from Australia to Illinois

Discover the top 9 airlines that operate flights from Australia 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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$968Average$1,764FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,079Average$1,610FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,093Average$1,557FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,110Average$1,455FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,257Average$1,940FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,385Average$1,914FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,496Average$1,614FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,841Average$2,272FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Virgin AustraliaCheapest$2,162Average$2,190FlexibilityNo cancel feeOn-time80%
Search Virgin Australia 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 Australia to Illinois?

Cheapflights helps you search for flights from Australia 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 Australia to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Australia.

Can Cheapflights find flights from Australia to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Australia to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Australia to Illinois become cheaper?

Yes, Cheapflights offers price alerts on Australia to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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