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Cheap flights from Australia to Illinois from $780

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
30 Mar — 6 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 28 February 2026.

Thu 12/319:40
BNE
-
STL
2 stops28h 11m
American Airlines
Mon 16/314:31
STL
-
BNE
2 stops47h 29m
American Airlines
Deal found 24/2$1,099
Tue 17/308:40
BNE
-
ORD
2 stops42h 45m
American Airlines
Wed 1/411:57
ORD
-
BNE
2 stops26h 03m
American Airlines
Deal found 25/2$1,214
Wed 18/310:30
MEL
-
STL
2 stops23h 30m
United Airlines
Sun 22/314:50
STL
-
MEL
2 stops25h 40m
United Airlines
Deal found 24/2$1,254
Wed 18/316:05
MEL
-
STL
1 stop19h 24m
American Airlines
Sun 22/306:38
STL
-
MEL
1 stop34h 52m
American Airlines
Deal found 24/2$1,339
Thu 16/410:00
BNE
-
ORD
1 stop19h 43m
Air Canada
Fri 24/408:40
ORD
-
BNE
2 stops31h 25m
Air Canada
Deal found 24/2$1,342
Tue 24/312:00
MEL
-
ORD
1 stop22h 40m
Qantas Airways
Tue 31/314:40
ORD
-
MEL
1 stop24h 05m
Qantas Airways
Deal found 24/2$1,369
Thu 21/510:00
BNE
-
ORD
2 stops36h 45m
Air Canada
Tue 2/615:40
ORD
-
BNE
1 stop24h 25m
Air Canada
Deal found 26/2$1,372
Tue 19/510:00
BNE
-
ORD
2 stops34h 25m
Air Canada
Tue 2/608:45
ORD
-
BNE
2 stops31h 20m
Air Canada
Deal found 26/2$1,373
Tue 19/510:00
BNE
-
ORD
2 stops21h 35m
Air Canada
Mon 1/608:45
ORD
-
BNE
2 stops31h 20m
Air Canada
Deal found 26/2$1,376
Mon 18/510:00
BNE
-
ORD
2 stops34h 25m
Air Canada
Tue 2/612:55
ORD
-
BNE
2 stops27h 10m
Air Canada
Deal found 26/2$1,380
Mon 23/312:00
MEL
-
ORD
1 stop25h 35m
Qantas Airways
Wed 1/416:44
ORD
-
MEL
1 stop22h 01m
Qantas Airways
Deal found 25/2$1,384
Sat 28/316:25
MEL
-
STL
2 stops23h 33m
Qantas Airways
Sat 4/416:13
STL
-
MEL
1 stop21h 47m
Qantas Airways
Deal found 27/2$1,391

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 28 February 2026.

Round-trip from

$1,099

One-way from

$780

Popular in

December

Cheapest in

April

Average price

$1,516
American Airlines
  • American Airlines
  • 12/3-16/3
  • 4 total stops
  • 75h 40m total
  • Australia to Illinois
Search Deals
12/5
  • 12/5
  • 3 total stops
  • 38h 30m total
  • Australia to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($329 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($53 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 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 28 February 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

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 12/3

19:40-08:51

2 stops28h 11m

Lambert-St Louis

Mon 16/3

14:31-05:00

2 stops47h 29m

$1,099

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 17/3

08:40-12:25

2 stops42h 45m

Chicago O'Hare Intl

Wed 1/4

11:57-05:00

2 stops26h 03m

$1,214

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 18/3

12:00-21:07

2 stops25h 07m

Lambert-St Louis

Sun 22/3

06:51-09:00

1 stop34h 09m

$1,254

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 18/3

16:05-22:58

1 stop22h 53m

Lambert-St Louis

Sun 22/3

06:38-09:30

1 stop34h 52m

$1,349

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

16:25-23:58

2 stops23h 33m

Lambert-St Louis

Sat 4/4

16:13-05:00

1 stop21h 47m

$1,391

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 2/3

19:40-23:47

1 stop20h 07m

Chicago O'Hare Intl

Mon 9/3

16:44-05:00

1 stop21h 16m

$1,447

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 23/3

10:30-17:00

2 stops22h 30m

Chicago O'Hare Intl

Wed 1/4

16:10-08:30

2 stops24h 20m

$1,481

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Tue 7/4

10:55-09:00

2 stops37h 05m

Chicago O'Hare Intl

Tue 14/4

16:10-08:15

2 stops25h 05m

$1,484

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Thu 19/3

10:30-14:55

1 stop20h 25m

Chicago O'Hare Intl

Wed 20/5

16:00-08:15

2 stops25h 15m

$1,492

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:20-17:53

2 stops22h 33m

Lambert-St Louis

Mon 16/3

06:38-09:00

1 stop34h 22m

$1,495

Flights are sorted by cheapest return flights first.

Deals found on 27/2

Showing 1-10 of 60 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $853). Flying from Australia to Illinois in December is currently the most expensive (average of $1,491). 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 28 February 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
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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
605 reviews
Air New Zealand
8.0
Very Good
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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
1,000 reviews
Air New Zealand
8.0
Very Good
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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
9,362 reviews
Air New Zealand
8.0
Very Good
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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
7.2
Good
11,367 reviews
Air New Zealand
8.0
Very Good
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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
10,757 reviews
Air New Zealand
8.0
Very Good
605 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

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 Qantas Airways fly from Australia to Illinois in about 20h 07m. The time it takes to get you to your destination can typically vary by up to 8h 04m. There are 14318 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 $179. Qantas Airways flights start at $608 while deals on Air New Zealand start at $745 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, May is the cheapest month in which you can book a flight from Australia to Illinois (average of $853). Flying from Australia to Illinois in December is currently the most expensive (average of $1,491). 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 28 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$948Average$1,555FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,065Average$1,586FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,079Average$1,535FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
American AirlinesCheapest$1,096Average$1,486FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,254Average$2,024FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Cathay PacificCheapest$1,367Average$1,889FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
ANACheapest$1,476Average$1,593FlexibilityNo cancel feeOn-time80%
Search ANA flights
Japan AirlinesCheapest$1,817Average$2,243FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Qatar AirwaysCheapest$2,294Average$2,954FlexibilityNo cancel feeOn-time68%
Search Qatar 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 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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