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

To fly one-way, consider booking your trip with Cathay Pacific, which is currently one of the cheapest options available, starting at $1,022. Air Canada flights start at $1,084 while deals on United Airlines start at $1,116 one-way. Find deals

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

Users have found that booking a flight from Australia to Illinois at least 38 days early can save you up to 51% on average compared to booking a flight this week. If booking 38 days before your flight isn’t an option for you, users have found flights from Australia to Illinois for as little as $1,644 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $2,541 for flights departing within the next 3 days. Find deals

What is the cheapest month to fly from Australia to Illinois?

Flights from Australia to Illinois lean towards being more expensive in December. Prices are generally better when you fly from Australia to Illinois in March, with the cheapest ticket starting at $1,019.

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.

$1,804+ Flights from Australia to Illinois

Cheap flight deals from Australia to Illinois

Round-trip from	$1,464
One-way from	$772
Popular in	December
Cheapest in	March
Average price	$1,669

Cathay Pacific
21/7-28/7
2 total stops
57h 35m total
Australia to Illinois

Search Deals

23/8
2 total stops
24h 21m total
Australia to Illinois

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($588 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($123 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Australia to Illinois

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 13 June 2025.

Mon 21/723:55BNE - ORD

1 stop29h 30mCathay Pacific

Mon 28/716:00ORD - BNE

1 stop28h 05mCathay Pacific

Deal found 9/6$1,464

Tue 21/1010:20SYD - STL

2 stops44h 58mMultiple Airlines

Tue 11/1116:43STL - SYD

2 stops23h 52mMultiple Airlines

Deal found 12/6$1,601

Thu 14/813:15SYD - ORD

2 stops24h 31mMultiple Airlines

Thu 4/906:20ORD - SYD

2 stops38h 55mMultiple Airlines

Deal found 12/6$1,606

Thu 28/822:15BNE - ORD

1 stop37h 55mEVA Air

Tue 9/900:30ORD - BNE

1 stop28h 30mEVA Air

Deal found 12/6$1,630

Mon 21/723:55BNE - ORD

1 stop29h 30mMultiple Airlines

Mon 28/716:00ORD - BNE

2 stops46h 15mMultiple Airlines

Deal found 10/6$1,635

Fri 14/1112:05MEL - ORD

2 stops24h 51mAir New Zealand

Fri 28/1115:43ORD - MEL

2 stops26h 07mAir New Zealand

Deal found 12/6$1,667

Mon 21/709:25SYD - MDW

2 stops23h 37mDelta

Sun 17/810:11MDW - SYD

2 stops29h 24mDelta

Deal found 12/6$1,678

Mon 21/709:25SYD - ORD

2 stops25h 02mDelta

Sun 17/815:50ORD - SYD

2 stops23h 45mDelta

Deal found 12/6$1,678

Mon 18/817:45SYD - STL

2 stops45h 31mAmerican Airlines

Sat 8/1113:55STL - SYD

1 stop24h 00mAmerican Airlines

Deal found 12/6$1,679

Fri 13/620:55SYD - ORD

1 stop26h 45mANA

Thu 31/709:05ORD - SYD

2 stops43h 10mANA

Deal found 12/6$1,686

Mon 18/809:25SYD - STL

2 stops28h 49mDelta

Sat 8/1112:10STL - SYD

2 stops27h 25mDelta

Deal found 12/6$1,706

Fri 14/1112:00MEL - ORD

1 stop41h 06mAmerican Airlines

Fri 28/1114:25ORD - MEL

2 stops29h 10mAmerican Airlines

Deal found 12/6$1,721

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 13 June 2025.

Mon 21/723:55BNE - ORD

1 stop29h 30mCathay Pacific

Mon 28/716:00ORD - BNE

1 stop28h 05mCathay Pacific

Deal found 9/6$1,464

Thu 14/813:15SYD - ORD

2 stops24h 31mMultiple Airlines

Thu 4/906:20ORD - SYD

2 stops38h 55mMultiple Airlines

Deal found 12/6$1,606

Mon 21/709:25SYD - MDW

2 stops24h 15mDelta

Tue 29/712:43MDW - SYD

2 stops26h 52mDelta

Deal found 12/6$1,678

Mon 18/817:45SYD - STL

2 stops45h 31mAmerican Airlines

Sat 8/1113:55STL - SYD

1 stop24h 00mAmerican Airlines

Deal found 12/6$1,679

Mon 4/820:55SYD - ORD

1 stop26h 45mANA

Mon 25/820:20ORD - SYD

2 stops31h 55mANA

Deal found 12/6$1,712

Mon 18/810:20SYD - STL

1 stop21h 25mUnited Airlines

Sat 8/1111:10STL - SYD

1 stop26h 50mUnited Airlines

Deal found 11/6$1,733

Mon 21/722:15BNE - ORD

1 stop37h 55mEVA Air

Sun 27/700:30ORD - BNE

1 stop28h 30mEVA Air

Deal found 10/6$1,739

Tue 29/709:45BNE - ORD

2 stops28h 27mAir New Zealand

Wed 6/807:10ORD - BNE

2 stops34h 20mAir New Zealand

Deal found 9/6$1,761

Mon 14/700:10PER - ORD

2 stops28h 50mJapan Airlines

Sun 27/701:30ORD - PER

2 stops34h 10mJapan Airlines

Deal found 12/6$1,854

Fri 18/717:45SYD - STL

1 stop20h 45mQantas Airways

Thu 31/706:14STL - SYD

1 stop33h 51mQantas Airways

Deal found 12/6$1,963

Thu 31/709:20SYD - ORD

2 stops37h 39mAir Canada

Thu 7/808:45ORD - SYD

2 stops31h 35mAir Canada

Deal found 12/6$1,970

Sat 19/721:40SYD - ORD

2 stops47h 00mAlaska Airlines

Wed 30/706:00ORD - SYD

2 stops46h 45mAlaska Airlines

Deal found 11/6$2,244

Last-minute flights from Australia to Illinois
Discover last-minute flight deals from Australia to Illinois. Data last updated 13 June 2025 and is based on user searches.

Fri 13/620:55SYD - ORD

1 stop26h 45mANA

Thu 31/709:05ORD - SYD

2 stops43h 10mANA

Deal found 12/6$1,686

Tue 17/609:25SYD - ORD

2 stops24h 00mDelta

Tue 29/715:54ORD - SYD

2 stops23h 41mDelta

Deal found 12/6$1,684

Tue 17/609:10SYD - ORD

1 stop20h 05mAmerican Airlines

Mon 28/722:17ORD - SYD

1 stop41h 48mAmerican Airlines

Deal found 12/6$1,885

Wed 18/609:25SYD - MDW

2 stops24h 16mDelta

Wed 30/713:46MDW - SYD

2 stops25h 49mDelta

Deal found 12/6$1,684

Wed 18/620:55SYD - ORD

1 stop26h 45mANA

Wed 30/719:40ORD - SYD

2 stops32h 35mANA

Deal found 12/6$1,712

Wed 18/617:45SYD - ORD

2 stops31h 37mMultiple Airlines

Thu 31/706:10ORD - SYD

1 stop34h 20mMultiple Airlines

Deal found 12/6$2,134

Wed 18/607:40SYD - ORD

1 stop45h 45mCathay Pacific

Sun 27/716:00ORD - SYD

2 stops52h 25mCathay Pacific

Deal found 12/6$2,237

Wed 18/600:10PER - ORD

2 stops28h 50mJapan Airlines

Mon 7/701:30ORD - PER

2 stops34h 10mJapan Airlines

Deal found 12/6$2,274

Thu 19/621:35PER - ORD

1 stop30h 20mANA

Tue 8/719:40ORD - PER

2 stops35h 20mANA

Deal found 12/6$1,804

Sat 21/606:00BNE - ORD

2 stops47h 25mMultiple Airlines

Mon 30/616:00ORD - BNE

2 stops41h 10mMultiple Airlines

Deal found 10/6$1,965

Sun 22/609:25SYD - STL

2 stops37h 58mDelta

Sun 29/606:30STL - SYD

2 stops33h 05mDelta

Deal found 11/6$1,759

Sun 22/623:55BNE - ORD

1 stop29h 30mCathay Pacific

Sun 13/716:00ORD - BNE

1 stop28h 05mCathay Pacific

Deal found 11/6$1,962

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 13 June 2025.

Sat 23/813:45SYD - ORD

2 stops24h 21mMultiple Airlines

Deal found 11/6$772

Mon 1/913:30MEL - ORD

2 stops24h 41mMultiple Airlines

Deal found 11/6$970

Sun 3/823:35BNE - ORD

3 stops44h 50mMultiple Airlines

Deal found 10/6$982

Wed 30/723:55BNE - ORD

1 stop29h 30mCathay Pacific

Deal found 10/6$1,022

Fri 15/812:00MEL - STL

3 stops41h 26mMultiple Airlines

Deal found 10/6$1,038

Tue 22/717:15ADL - ORD

3 stops44h 54mMultiple Airlines

Deal found 11/6$1,073

Thu 20/1108:00MEL - STL

3 stops48h 26mAir Canada

Deal found 12/6$1,084

Mon 17/1113:00MEL - STL

1 stop21h 03mUnited Airlines

Deal found 12/6$1,116

Mon 28/709:45MEL - ORD

1 stop22h 57mAmerican Airlines

Deal found 12/6$1,168

Fri 26/909:10SYD - ORD

1 stop23h 46mAmerican Airlines

Deal found 11/6$1,174

Sat 5/722:15BNE - ORD

1 stop37h 55mEVA Air

Deal found 9/6$1,176

Thu 26/605:10PER - ORD

3 stops46h 45mMultiple Airlines

Deal found 11/6$1,196

Cheapflights Fare Finder

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

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 21/7

23:55-14:25

1 stop29h 30m

Chicago O'Hare Intl

Mon 28/7

16:00-11:05

1 stop28h 05m

$1,464

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 14/8

13:15-22:46

2 stops24h 31m

Chicago O'Hare Intl

Thu 4/9

06:20-12:15

2 stops38h 55m

$1,606

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 21/7

23:55-14:25

1 stop29h 30m

Chicago O'Hare Intl

Mon 28/7

16:00-05:15

2 stops46h 15m

$1,635

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 21/7

09:25-18:02

2 stops23h 37m

Chicago Midway

Sun 17/8

10:11-06:35

2 stops29h 24m

$1,678

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 21/7

09:25-19:27

2 stops25h 02m

Chicago O'Hare Intl

Sun 17/8

15:50-06:35

2 stops23h 45m

$1,678

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

17:45-00:16

2 stops45h 31m

Lambert-St Louis

Sat 8/11

13:55-06:55

1 stop24h 00m

$1,679

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:25-23:14

2 stops28h 49m

Lambert-St Louis

Sat 8/11

12:10-08:35

2 stops27h 25m

$1,706

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 4/8

20:55-08:40

1 stop26h 45m

Chicago O'Hare Intl

Mon 25/8

20:20-19:15

2 stops31h 55m

$1,712

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:30-16:31

2 stops22h 01m

Lambert-St Louis

Sat 8/11

16:35-07:00

1 stop21h 25m

$1,733

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 4/8

09:10-17:42

1 stop23h 32m

Chicago O'Hare Intl

Mon 25/8

06:00-07:05

1 stop34h 05m

$1,733

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 60 results

...

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 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.

Rainfall in Illinois 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

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 a feel of what it's like to fly with Air Tahiti Nui, EVA Air and Korean Air from Australia to Illinois by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui

8.7

Very Good

64 reviews

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

EVA Air

8.4

Very Good

1,202 reviews

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Korean Air

8.4

Very Good

1,091 reviews

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Japan Airlines

8.3

Very Good

1,490 reviews

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

ANA

8.3

Very Good

882 reviews

Air Tahiti Nui

8.7

Very Good

64 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Related info for your journey

What are the cheapest airlines to fly from Australia to Illinois one-way?
To fly one-way, consider booking your trip with Cathay Pacific, which is currently one of the cheapest options available, starting at $1,022. Air Canada flights start at $1,084 while deals on United Airlines start at $1,116 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Australia to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$982	Average$1,677	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
American Airlines	Cheapest$1,137	Average$1,783	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air New Zealand	Cheapest$1,186	Average$1,665	FlexibilityNo cancel fee	On-time78%	Search Air New Zealand flights
Air Canada	Cheapest$1,277	Average$1,859	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,370	Average$2,227	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
EVA Air	Cheapest$1,542	Average$1,691	FlexibilityNo cancel fee	On-time74%	Search EVA Air flights
Cathay Pacific	Cheapest$1,564	Average$2,336	FlexibilityNo cancel fee	On-time72%	Search Cathay Pacific flights
ANA	Cheapest$1,612	Average$1,810	FlexibilityNo cancel fee	On-time80%	Search ANA flights
Virgin Australia	Cheapest$1,769	Average$2,813	FlexibilityNo cancel fee	On-time80%	Search Virgin Australia flights
Japan Airlines	Cheapest$2,074	Average$2,423	FlexibilityNo cancel fee	On-time79%	Search Japan Airlines flights

Fly with Cheapflights

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 $772

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Australia to Illinois

Keep the following information in mind while searching for Australia to Illinois flight deals. Data was last updated 13 June 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 13 June 2025.

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 13 June 2025.

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

Everything you need to know about your flight from Australia to Illinois

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

Find hourly flight availability from Australia 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 13 June 2025.

Rainfall in Illinois by month

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

Temperature in Illinois by month

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

Reviews of airlines servicing Illinois

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.

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?

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 Australia to Illinois

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

Top 10 airlines flying from Australia to Illinois

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?

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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Travel Smart

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 13 June 2025.