How long is the flight from Australia to Illinois?

Airlines like American Airlines, Cathay Pacific, and United Airlines fly from Australia to Illinois in about 22h 31m. The time it takes to get you to your destination can typically vary by up to 17h 44m. 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 $500. Air New Zealand flights start at $627 while deals on United Airlines start at $1,014 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.

$550+ 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 6 September 2026.

Wed 18/1114:05 -

1 stop24h 54m

Thu 19/1106:00 -

1 stop34h 00m

Deal found 2/9$1,361

Mon 19/1014:15 -

3 stops31h 01m

Mon 26/1006:30 -

3 stops38h 05m

Deal found 4/9$1,404

Fri 4/1221:25 -

1 stop25h 34m

Sat 5/1221:00 -

1 stop40h 25m

Deal found 3/9$1,460

Sat 17/1009:45 -

1 stop30h 01m

Sat 24/1019:10 -

1 stop41h 50m

Deal found 1/9$1,556

Mon 19/1012:20 -

1 stop40h 35m

Sun 1/1114:10 -

1 stop28h 35m

Deal found 2/9$1,567

Sat 17/1009:45 -

2 stops26h 03m

Sat 24/1011:31 -

2 stops25h 29m

Deal found 1/9$1,585

Tue 20/1010:10 -

1 stop29h 36m

Tue 27/1012:47 -

2 stops30h 58m

Deal found 4/9$1,601

Mon 12/1010:10 -

1 stop29h 36m

Thu 5/1112:58 -

1 stop24h 57m

Deal found 1/9$1,607

Wed 21/1010:10 -

2 stops43h 34m

Sat 24/1015:20 -

1 stop23h 35m

Deal found 3/9$1,614

Wed 21/1012:20 -

1 stop40h 35m

Thu 29/1015:10 -

1 stop41h 10m

Deal found 1/9$1,614

Thu 5/1112:15 -

1 stop40h 15m

Mon 9/1114:10 -

1 stop28h 35m

Deal found 2/9$1,644

Tue 22/913:25 -

3 stops31h 13m

Sun 27/906:30 -

3 stops38h 55m

Deal found 2/9$1,667

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 6 September 2026.

Wed 21/1010:10 -

1 stop29h 36m

Sat 24/1019:10 -

2 stops24h 35m

Deal found 5/9$1,644

Thu 5/1112:15 -

1 stop40h 15m

Mon 9/1114:10 -

1 stop28h 35m

Deal found 4/9$1,651

Tue 20/1010:30 -

2 stops22h 31m

Tue 27/1013:08 -

3 stops26h 57m

Deal found 4/9$1,743

Sat 14/1110:40 -

2 stops26h 29m

Mon 23/1106:13 -

2 stops33h 17m

Deal found 3/9$1,801

Wed 21/1008:40 -

2 stops28h 02m

Thu 29/1015:47 -

2 stops34h 13m

Deal found 1/9$1,941

Sat 10/1012:20 -

1 stop40h 35m

Fri 23/1016:15 -

2 stops46h 30m

Deal found 6/9$1,962

Thu 5/1121:35 -

2 stops54h 25m

Mon 9/1120:15 -

2 stops54h 10m

Deal found 5/9$2,263

Fri 5/223:40 -

2 stops35h 49m

Tue 9/213:40 -

2 stops35h 10m

Deal found 2/9$2,398

Fri 18/902:10 -

2 stops48h 45m

Sat 17/1016:15 -

2 stops43h 55m

Deal found 4/9$2,477

Mon 19/1012:20 -

1 stop40h 35m

Sun 1/1114:10 -

2 stops33h 45m

Deal found 2/9$1,786

Mon 12/1010:30 -

2 stops22h 07m

Thu 5/1111:00 -

2 stops29h 20m

Deal found 1/9$1,801

Wed 21/1012:20 -

1 stop40h 35m

Thu 29/1015:10 -

2 stops33h 45m

Deal found 1/9$1,789

Sat 14/1109:20 -

1 stop21h 53m

Mon 23/1111:00 -

1 stop27h 00m

Deal found 3/9$1,801

Sun 15/1112:10 -

2 stops26h 26m

Wed 25/1114:00 -

2 stops25h 55m

Deal found 2/9$2,018

Thu 22/1008:40 -

1 stop45h 15m

Mon 26/1015:10 -

2 stops35h 45m

Deal found 1/9$2,022

Wed 30/910:00 -

2 stops29h 44m

Wed 7/1012:28 -

2 stops28h 22m

Deal found 2/9$2,088

Sat 14/1109:20 -

1 stop21h 53m

Sun 22/1114:55 -

1 stop23h 05m

Deal found 3/9$1,801

Sat 17/1009:45 -

2 stops44h 12m

Wed 21/1006:05 -

1 stop30h 55m

Deal found 1/9$2,223

Thu 29/1019:45 -

2 stops33h 45m

Wed 11/1114:10 -

1 stop37h 40m

Deal found 4/9$2,023

Thu 5/1122:20 -

1 stop31h 10m

Mon 9/1114:10 -

1 stop37h 40m

Deal found 5/9$1,868

Tue 20/1022:45 -

2 stops35h 20m

Sat 24/1019:20 -

1 stop34h 25m

Deal found 2/9$2,480

Fri 16/1005:00 -

2 stops47h 55m

Fri 23/1016:15 -

2 stops40h 20m

Deal found 1/9$2,056

Sat 17/1011:20 -

1 stop23h 23m

Sat 24/1015:12 -

2 stops24h 53m

Deal found 2/9$1,871

Wed 21/1015:25 -

1 stop38h 30m

Sun 25/1015:10 -

1 stop39h 55m

Deal found 2/9$1,933

Sat 14/1110:40 -

2 stops26h 29m

Wed 18/1119:18 -

2 stops44h 12m

Deal found 3/9$2,346

Tue 20/1022:55 -

2 stops32h 40m

Sat 24/1008:29 -

2 stops40h 51m

Deal found 5/9$2,467

Sat 17/1022:45 -

1 stop29h 20m

Sat 24/1016:26 -

2 stops37h 19m

Deal found 1/9$2,545

Sat 14/1110:40 -

2 stops23h 01m

Thu 19/1109:45 -

2 stops29h 45m

Deal found 3/9$2,346

Thu 1/1020:45 -

3 stops24h 35m

Wed 14/1015:49 -

2 stops35h 01m

Deal found 2/9$2,162

Sun 15/1115:30 -

1 stop38h 00m

Wed 25/1114:10 -

1 stop29h 20m

Deal found 5/9$1,993

Find flight deals from Australia to Illinois

Round-trip from	$1,361
One-way from	$550
Popular in	May
Cheapest in	October
Average price	$1,751

Qantas Airways
18/11-19/11
2 total stops
58h 54m total
Australia to Illinois

Search Deals

20/10-31/12
2 total stops
32h 19m total
Australia to Illinois

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($264 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($72 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD Sydney Kingsford Smith - MDW Chicago Midway

SYDMDW

Sydney Kingsford Smith

Tue 20/10

14:15-23:43

3 stops49h 28m

Chicago Midway

Wed 31/12

00:00-16:00

Nonstop0h 00m

$659

MelbourneChicago

MEL Melbourne - MDW Chicago Midway

MELMDW

Melbourne

Tue 20/10

14:25-14:35

3 stops40h 10m

Chicago Midway

Wed 31/12

00:00-16:00

Nonstop0h 00m

$759

MelbourneChicago

MEL Melbourne - MDW Chicago Midway

MELMDW

Melbourne

Thu 22/10

14:20-23:43

3 stops49h 23m

Chicago Midway

Wed 31/12

00:00-16:00

Nonstop0h 00m

$802

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Mon 2/11

10:10-21:09

2 stops27h 59m

Lambert-St Louis

Wed 31/12

00:00-16:00

Nonstop0h 00m

$855

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 7/11

21:30-07:55

1 stop51h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,025

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Thu 22/10

17:10-15:05

1 stop37h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,032

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Wed 30/9

17:20-15:40

1 stop37h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,068

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Wed 7/10

17:10-15:05

1 stop37h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,073

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Tue 13/10

17:10-15:05

1 stop37h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,082

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 17/10

10:10-18:20

2 stops24h 10m

Lambert-St Louis

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,103

Flights are sorted by cheapest return flights first.

Deals found on 5/9

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-STL

SYD-ORD

MEL-STL

BNE-ORD

MEL-ORD

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-STL

SYD-ORD

MEL-STL

BNE-ORD

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 $1,560). Flying from Australia to Illinois in July is currently the most expensive (average of $1,914). 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 35 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

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Air New Zealand

8.0

Very Good

668 reviews

Air New Zealand

8.0

Very Good

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Qantas Airways

7.5

Good

1,090 reviews

Air New Zealand

8.0

Very Good

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

United Airlines

7.4

Good

10,172 reviews

Air New Zealand

8.0

Very Good

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

American Airlines

7.1

Good

12,039 reviews

Air New Zealand

8.0

Very Good

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Air Canada

7.1

Good

11,592 reviews

Air New Zealand

8.0

Very Good

668 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

Related info for your journey

How long is the flight from Australia to Illinois?
Airlines like American Airlines, Cathay Pacific, and United Airlines fly from Australia to Illinois in about 22h 31m. The time it takes to get you to your destination can typically vary by up to 17h 44m. 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 $500. Air New Zealand flights start at $627 while deals on United Airlines start at $1,014 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 $1,560). Flying from Australia to Illinois in July is currently the most expensive (average of $1,914). 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

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Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

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$579	Average$1,605	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest$1,051	Average$1,608	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,218	Average$1,805	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Qantas Airways	Cheapest$1,228	Average$2,016	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
Air New Zealand	Cheapest$1,304	Average$1,495	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights
Japan Airlines	Cheapest$1,353	Average$2,764	FlexibilityNo cancel fee	On-time79%	Search Japan Airlines flights
Cathay Pacific	Cheapest$1,651	Average$1,933	FlexibilityNo cancel fee	On-time72%	Search Cathay Pacific flights
Virgin Australia	Cheapest$2,107	Average$2,134	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 $550

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. 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 6 September 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 6 September 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 6 September 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 6 September 2026.

Last-minute flights from Australia to IllinoisDiscover last-minute flight deals from Australia to Illinois. Data last updated 6 September 2026 and is based on user searches.

Discover last-minute flight deals from Australia to Illinois. Data last updated 6 September 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 6 September 2026.

Search for one-way flight options from Australia to Illinois. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.

Find flight deals from Australia to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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 35 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 6 September 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 6 September 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 6 September 2026.

Last-minute flights from Australia to Illinois
Discover last-minute flight deals from Australia to Illinois. Data last updated 6 September 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 6 September 2026.