How long is the flight from Australia to Illinois?

Airlines like American Airlines, Qantas Airways, and United Airlines fly from Australia to Illinois in about 20h 56m. The time it takes to get you to your destination can typically vary by up to 4h 46m. There are 14571 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 Qantas Airways, which is currently one of the cheapest options available, starting at $511. Air New Zealand flights start at $750 while deals on United Airlines start at $1,112 one-way.

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.

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).

What is the cheapest time of day to fly from AU to IL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Australia to Illinois as you normally would.

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.

$705+ Cheap Flights from Australia to Illinois

Cheap flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 11 August 2026.

Tue 8/913:15 -

3 stops37h 36m

Tue 22/906:20 -

3 stops38h 30m

Deal found 11/8$1,252

Sun 9/811:30 -

2 stops32h 54m

Sat 22/815:22 -

1 stop24h 23m

Deal found 8/8$1,335

Wed 7/1006:05 -

3 stops43h 35m

Wed 21/1010:35 -

3 stops34h 15m

Deal found 9/8$1,337

Mon 10/809:10 -

1 stop28h 49m

Sun 23/806:00 -

2 stops36h 20m

Deal found 7/8$1,602

Mon 19/1018:25 -

2 stops33h 18m

Tue 3/1115:30 -

2 stops38h 10m

Deal found 9/8$1,614

Mon 12/1018:25 -

2 stops33h 18m

Wed 28/1015:30 -

2 stops39h 10m

Deal found 11/8$1,617

Mon 2/1117:50 -

2 stops34h 47m

Tue 17/1115:30 -

2 stops38h 10m

Deal found 10/8$1,634

Thu 5/1109:40 -

2 stops24h 37m

Mon 9/1114:54 -

1 stop23h 36m

Deal found 6/8$1,636

Fri 6/1121:10 -

2 stops31h 27m

Sun 22/1115:30 -

2 stops35h 05m

Deal found 10/8$1,655

Mon 2/1117:50 -

2 stops34h 47m

Wed 18/1115:30 -

2 stops38h 10m

Deal found 6/8$1,672

Wed 7/1010:10 -

1 stop29h 36m

Wed 21/1006:04 -

1 stop34h 01m

Deal found 9/8$1,672

Thu 5/1109:40 -

1 stop24h 35m

Mon 9/1119:05 -

1 stop19h 25m

Deal found 7/8$1,682

Best flights from Australia to Illinois
Discover carefully curated flight deals from Australia to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Mon 2/1117:50 -

2 stops34h 47m

Tue 17/1115:30 -

2 stops38h 10m

Deal found 10/8$1,634

Thu 5/1109:40 -

2 stops25h 42m

Mon 9/1113:20 -

2 stops25h 10m

Deal found 6/8$1,636

Wed 21/1018:50 -

1 stop20h 56m

Sat 14/1114:54 -

1 stop23h 01m

Deal found 8/8$1,711

Wed 23/910:55 -

2 stops24h 44m

Sat 24/1013:25 -

2 stops28h 05m

Deal found 7/8$1,805

Wed 9/909:15 -

2 stops26h 20m

Sat 19/908:00 -

2 stops31h 50m

Deal found 6/8$1,811

Mon 14/922:15 -

1 stop37h 30m

Tue 15/900:30 -

1 stop28h 30m

Deal found 8/8$1,839

Mon 16/1108:35 -

1 stop22h 20m

Mon 30/1122:45 -

1 stop42h 35m

Deal found 8/8$1,851

Thu 5/1111:15 -

2 stops27h 11m

Mon 9/1106:15 -

2 stops35h 45m

Deal found 9/8$1,943

Tue 3/1100:40 -

1 stop28h 15m

Fri 20/1114:35 -

1 stop40h 35m

Deal found 10/8$1,988

Mon 2/1122:45 -

2 stops37h 45m

Tue 17/1118:50 -

1 stop33h 55m

Deal found 8/8$2,749

Mon 2/1121:55 -

1 stop29h 55m

Thu 5/1110:30 -

1 stop43h 40m

Deal found 9/8$2,750

Sun 20/906:00 -

3 stops28h 48m

Sun 27/912:59 -

3 stops30h 41m

Deal found 8/8$3,298

Thu 5/1109:40 -

1 stop18h 48m

Mon 9/1113:58 -

2 stops24h 32m

Deal found 7/8$1,713

Mon 12/1010:10 -

1 stop29h 36m

Thu 5/1106:02 -

1 stop33h 58m

Deal found 6/8$1,810

Sun 11/1000:45 -

3 stops50h 58m

Wed 28/1015:30 -

3 stops49h 20m

Deal found 11/8$1,847

Sat 12/922:15 -

1 stop37h 30m

Thu 24/900:30 -

1 stop28h 30m

Deal found 8/8$1,902

Thu 5/1112:10 -

1 stop40h 45m

Sun 22/1114:35 -

2 stops57h 20m

Deal found 10/8$2,005

Wed 2/909:55 -

2 stops27h 32m

Thu 3/911:15 -

2 stops30h 30m

Deal found 8/8$2,099

Sun 18/1012:20 -

1 stop40h 35m

Tue 20/1016:15 -

2 stops33h 45m

Deal found 7/8$1,980

Thu 5/1112:10 -

1 stop40h 45m

Sat 21/1114:35 -

2 stops33h 20m

Deal found 10/8$2,005

Fri 28/823:45 -

2 stops30h 44m

Fri 11/917:50 -

2 stops30h 55m

Deal found 10/8$2,076

Wed 26/809:10 -

2 stops38h 14m

Sun 30/818:45 -

1 stop21h 10m

Deal found 10/8$2,077

Mon 19/1018:50 -

2 stops39h 47m

Tue 3/1114:22 -

2 stops41h 58m

Deal found 11/8$2,201

Tue 3/1110:40 -

2 stops23h 07m

Tue 17/1112:30 -

2 stops27h 00m

Deal found 7/8$2,438

Wed 21/1011:55 -

3 stops27h 49m

Sat 14/1113:40 -

3 stops27h 55m

Deal found 8/8$2,032

Sat 31/1012:10 -

1 stop40h 45m

Wed 18/1114:35 -

1 stop40h 35m

Deal found 10/8$2,039

Wed 7/1011:00 -

1 stop22h 50m

Wed 14/1007:10 -

2 stops33h 40m

Deal found 7/8$2,438

Wed 20/111:50 -

3 stops26h 09m

Sat 13/213:30 -

3 stops26h 05m

Deal found 6/8$2,033

Wed 23/913:35 -

1 stop25h 08m

Sat 24/1005:40 -

1 stop31h 20m

Deal found 7/8$2,250

Wed 18/1100:40 -

1 stop28h 15m

Fri 20/1114:35 -

2 stops49h 00m

Deal found 10/8$2,067

Find flight deals from Australia to Illinois

Round-trip from	$1,252
One-way from	$705
Popular in	July
Cheapest in	August
Average price	$1,529

8/9-22/9
6 total stops
76h 06m total
Australia to Illinois

Search Deals

4/9
2 total stops
32h 02m total
Australia to Illinois

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($47 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 August 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PerthChicago

PER Perth - ORD Chicago O'Hare Intl

PERORD

Perth

Mon 2/11

17:50-14:37

2 stops34h 47m

Chicago O'Hare Intl

Tue 17/11

15:30-19:40

2 stops38h 10m

$1,634

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 5/11

09:40-19:22

2 stops25h 42m

Lambert-St Louis

Mon 9/11

13:20-06:30

2 stops25h 10m

$1,636

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

18:50-23:46

1 stop20h 56m

Lambert-St Louis

Sat 14/11

14:54-06:55

1 stop23h 01m

$1,711

Fastest return journey

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 5/11

09:40-12:28

1 stop18h 48m

Lambert-St Louis

Mon 9/11

13:58-06:30

2 stops24h 32m

$1,713

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Wed 23/9

10:55-20:39

2 stops24h 44m

Lambert-St Louis

Sat 24/10

13:25-09:30

2 stops28h 05m

$1,805

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 12/10

10:10-23:46

1 stop29h 36m

Lambert-St Louis

Thu 5/11

06:02-09:00

1 stop33h 58m

$1,810

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/9

09:15-20:35

2 stops26h 20m

Lambert-St Louis

Sat 19/9

08:00-06:50

2 stops31h 50m

$1,811

BrisbaneChicago

BNE Brisbane - ORD Chicago O'Hare Intl

BNEORD

Brisbane

Mon 14/9

22:15-20:45

1 stop37h 30m

Chicago O'Hare Intl

Tue 15/9

00:30-20:00

1 stop28h 30m

$1,839

PerthChicago

PER Perth - ORD Chicago O'Hare Intl

PERORD

Perth

Sun 11/10

00:45-14:43

3 stops50h 58m

Chicago O'Hare Intl

Wed 28/10

15:30-05:50

3 stops49h 20m

$1,847

PerthChicago

PER Perth - ORD Chicago O'Hare Intl

PERORD

Perth

Mon 16/11

08:35-16:55

1 stop22h 20m

Chicago O'Hare Intl

Mon 30/11

22:45-07:20

1 stop42h 35m

$1,851

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

SYD-ORD

BNE-ORD

MEL-ORD

SYD-MDW

BNE-MDW

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

AU0-USIL

SYD-ORD

BNE-ORD

MEL-ORD

SYD-MDW

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

Currently, October is the cheapest month in which you can book a flight from Australia to Illinois (average of $1,586). Flying from Australia to Illinois in July is currently the most expensive (average of $1,984). 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.

How far ahead should I book a flight from Australia to Illinois?

The price you pay for your flight from Australia to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Illinois

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

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Air New Zealand

8.0

Very Good

659 reviews

Air New Zealand

8.0

Very Good

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Qantas Airways

7.5

Good

1,081 reviews

Air New Zealand

8.0

Very Good

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

United Airlines

7.4

Good

10,102 reviews

Air New Zealand

8.0

Very Good

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

American Airlines

7.1

Good

11,902 reviews

Air New Zealand

8.0

Very Good

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Air Canada

7.1

Good

11,461 reviews

Air New Zealand

8.0

Very Good

659 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Related info for your journey

How long is the flight from Australia to Illinois?
Airlines like American Airlines, Qantas Airways, and United Airlines fly from Australia to Illinois in about 20h 56m. The time it takes to get you to your destination can typically vary by up to 4h 46m. There are 14571 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 Qantas Airways, which is currently one of the cheapest options available, starting at $511. Air New Zealand flights start at $750 while deals on United Airlines start at $1,112 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, October is the cheapest month in which you can book a flight from Australia to Illinois (average of $1,586). Flying from Australia to Illinois in July is currently the most expensive (average of $1,984). 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

Airlines

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

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Popular flights

Return Flight Options

Top destinations

Airlines flying to Illinois

American Airlines flights to Illinois

Air Canada flights to Illinois

Qantas Airways flights to Illinois

Air New Zealand flights to Illinois

United Airlines flights to Illinois

Top 8 airlines flying from Australia to Illinois

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$591	Average$1,651	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest$1,073	Average$1,670	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,243	Average$1,850	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Qantas Airways	Cheapest$1,250	Average$1,935	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
Air New Zealand	Cheapest$1,331	Average$1,532	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights
Japan Airlines	Cheapest$1,381	Average$2,820	FlexibilityNo cancel fee	On-time79%	Search Japan Airlines flights
Cathay Pacific	Cheapest$1,685	Average$1,973	FlexibilityNo cancel fee	On-time72%	Search Cathay Pacific flights
Virgin Australia	Cheapest$2,150	Average$2,178	FlexibilityNo cancel fee	On-time80%	Search Virgin Australia flights

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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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Cheap flights from Australia to Illinois from $705

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Australia to Illinois

Cheapest flights from Australia to IllinoisExplore 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 11 August 2026.

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 11 August 2026.

Best flights from Australia to IllinoisDiscover carefully curated flight deals from Australia to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Discover carefully curated flight deals from Australia to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Last-minute flights from Australia to IllinoisDiscover last-minute flight deals from Australia to Illinois. Data last updated 11 August 2026 and is based on user searches.

Discover last-minute flight deals from Australia to Illinois. Data last updated 11 August 2026 and is based on user searches.

One-way flights from Australia to IllinoisSearch for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.

Search for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.

Find flight deals from Australia to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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Use the filters below to find and compare flights from Australia to Illinois that are best for you.

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.

Cheapflights Insights

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

How far ahead should I book a flight from Australia to Illinois?

The price you pay for your flight from Australia to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Illinois

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.

Related info for your journey

How long is the flight from Australia to Illinois?

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

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

How can I find direct flights from Australia to Illinois?

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

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

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.

Airlines flying to Illinois

Alternative routes for Australia to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Australia to Illinois by cabin class

Find flights from Australia to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Australia and Illinois flights

Browse other Australia and Illinois flight options. Last updated on 11 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Find a return flight route from Illinois

Find the right flight back to Australia after your stay in Illinois

Australia to Illinois flights

Consider these flights travelling from Australia to Illinois.

Top 8 airlines flying from Australia to Illinois

Fly with Cheapflights

How does Cheapflights help users find flights from Australia to Illinois?

Why should you use Cheapflights to find cheap flight tickets from Australia to Illinois?

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

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

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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 11 August 2026.

Best flights from Australia to Illinois
Discover carefully curated flight deals from Australia to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 August 2026.

Last-minute flights from Australia to Illinois
Discover last-minute flight deals from Australia to Illinois. Data last updated 11 August 2026 and is based on user searches.

One-way flights from Australia to Illinois
Search for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated 11 August 2026.