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Cheap flights from Illinois to Australia from $620

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Australia departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
15:35 - 08:45
ORD
-
BNE
25h 10m
1 stop
Air Canada Logo
09:45 - 14:41
BNE
-
ORD
19h 56m
1 stop
$1,270Air Canada
Tue, 24 Feb - Wed, 11 Mar
Air Canada Logo
15:40 - 07:05
ORD
-
BNE
24h 25m
1 stop
Air Canada Logo
10:00 - 14:43
BNE
-
ORD
19h 43m
1 stop
$1,271Air Canada
Tue, 31 Mar - Wed, 22 Apr
Qantas Airways Logo
18:50 - 20:50
STL
-
SYD
34h 00m
2 stops
Qantas Airways Logo
11:20 - 23:58
SYD
-
STL
28h 38m
1 stop
$1,287Qantas Airways
Mon, 9 Mar - Mon, 16 Mar
Qantas Airways Logo
18:50 - 20:50
STL
-
SYD
34h 00m
2 stops
Qantas Airways Logo
18:50 - 23:58
SYD
-
STL
21h 08m
1 stop
$1,298Qantas Airways
Mon, 23 Mar - Mon, 30 Mar
Multiple Airlines Logo
19:21 - 06:45
ORD
-
MEL
44h 24m
1 stop
Multiple Airlines Logo
13:30 - 05:50
MEL
-
ORD
31h 20m
2 stops
$1,312Multiple Airlines
Mon, 20 Apr - Mon, 11 May
Multiple Airlines Logo
19:29 - 07:30
ORD
-
SYD
44h 01m
1 stop
Multiple Airlines Logo
13:15 - 05:39
SYD
-
ORD
31h 24m
2 stops
$1,348Multiple Airlines
Tue, 31 Mar - Mon, 13 Apr
American Airlines Logo
12:45 - 05:00
STL
-
BNE
25h 15m
2 stops
American Airlines Logo
20:35 - 08:31
BNE
-
STL
26h 56m
2 stops
$1,633American Airlines
Wed, 1 Jul - Wed, 29 Jul
American Airlines Logo
06:36 - 05:00
STL
-
BNE
31h 24m
1 stop
American Airlines Logo
20:35 - 08:31
BNE
-
STL
26h 56m
2 stops
$1,647American Airlines
Wed, 1 Jul - Wed, 29 Jul
Delta Logo
12:47 - 07:00
MDW
-
MEL
26h 13m
2 stops
Delta Logo
09:10 - 17:54
MEL
-
MDW
24h 44m
2 stops
$1,976Delta
Wed, 11 Mar - Sun, 22 Mar
Delta Logo
14:05 - 07:30
MDW
-
SYD
25h 25m
2 stops
Delta Logo
09:40 - 17:22
SYD
-
MDW
23h 42m
2 stops
$1,976Delta
Tue, 10 Mar - Sun, 15 Mar

Qantas Airways flights from Illinois to Australia

Our best Qantas Airways deals on Illinois to Australia flight tickets
Qantas Airways
11 Feb
STL07:04Lambert-St Louis
32h 56m
1 stop
SYD09:00Sydney Kingsford Smith
20 Feb
SYD07:05Sydney Kingsford Smith
33h 54m
2 stops
STL23:59Lambert-St Louis
$1,271
Qantas Airways
9 Mar
STL18:50Lambert-St Louis
34h 00m
2 stops
SYD20:50Sydney Kingsford Smith
16 Mar
SYD11:20Sydney Kingsford Smith
28h 38m
1 stop
STL23:58Lambert-St Louis
$1,287
Qantas Airways
23 Mar
STL18:50Lambert-St Louis
34h 00m
2 stops
SYD20:50Sydney Kingsford Smith
30 Mar
SYD18:50Sydney Kingsford Smith
21h 08m
1 stop
STL23:58Lambert-St Louis
$1,298

ANA flights from Illinois to Australia

Our best ANA deals on Illinois to Australia flight tickets
ANA
5 Mar
ORD15:35Chicago O'Hare Intl
25h 10m
1 stop
BNE08:45Brisbane
13 Mar
BNE09:45Brisbane
19h 56m
1 stop
ORD14:41Chicago O'Hare Intl
$1,429
ANA
6 Apr
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
6 May
SYD20:55Sydney Kingsford Smith
26h 45m
1 stop
ORD08:40Chicago O'Hare Intl
$1,674

momondo Fare Finder

 
Customise your flight search to find flights from Illinois to Australia 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, momondo users made 78,305 searches. Data last updated 8 February 2026.
Use the filters below to find and compare flights from Illinois to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 24/2

15:35-08:45

1 stop25h 10m

Brisbane

Wed 11/3

09:45-14:41

1 stop19h 56m

$1,270

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 31/3

15:40-07:05

1 stop24h 25m

Brisbane

Wed 22/4

10:00-14:43

1 stop19h 43m

$1,271

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/3

18:50-20:50

2 stops34h 00m

Sydney Kingsford Smith

Mon 16/3

11:20-23:58

1 stop28h 38m

$1,287

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 23/3

18:50-20:50

2 stops34h 00m

Sydney Kingsford Smith

Mon 30/3

18:50-23:58

1 stop21h 08m

$1,298

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 20/4

19:21-06:45

1 stop44h 24m

Melbourne

Mon 11/5

13:30-05:50

2 stops31h 20m

$1,312

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 31/3

19:29-07:30

1 stop44h 01m

Sydney Kingsford Smith

Mon 13/4

13:15-05:39

2 stops31h 24m

$1,348

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 1/7

12:45-05:00

2 stops25h 15m

Brisbane

Wed 29/7

20:35-08:31

2 stops26h 56m

$1,633

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 1/7

06:36-05:00

1 stop31h 24m

Brisbane

Wed 29/7

20:35-08:31

2 stops26h 56m

$1,647

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 11/3

12:47-07:00

2 stops26h 13m

Melbourne

Sun 22/3

09:10-17:54

2 stops24h 44m

$1,976

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Tue 10/3

14:05-07:30

2 stops25h 25m

Sydney Kingsford Smith

Sun 15/3

09:40-17:22

2 stops23h 42m

$1,976

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Australia from

How to get the cheapest flight ticket from Illinois to Australia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Australia?

In general, June is the cheapest month to fly from Illinois to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,232. If you don’t want to visit Australia in June, then you should wait until May to fly from Illinois, when ticket prices are also cheap, with an average price of $1,238.

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

You are more likely to see cheaper flights to Australia from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,581 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Illinois for as low as $1,298 on momondo.

Can stopping save me money on Illinois to Australia flights?

You could potentially save up to 19% on your flight if you consider stops on a Illinois to Australia flight.

Cheap Illinois to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Australia

Fastest flight time

21h 11m

Direct flights

None
The fastest flight from Illinois to Australia takes 21h 11m
There are no direct flights from Illinois to Australia. There are no popular flight routes from Illinois to Australia.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Australia?

    Prices for flights from Illinois to Australia refresh daily.

  • How many operators does momondo search for flights from Illinois to Australia?

  • How old do you have to be to fly from Illinois to Australia?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Australia.

  • What documentation or ID do you need to fly to Australia?

    The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Australia

Compare and see reviews for airlines that fly from Illinois to Australia with momondo
Airline
Rating
Free cancellation
Price
Qantas AirwaysPriceFrom $1,216Free cancellationRating
7.5
988 reviews
Search Qantas Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Australia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Australia . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Illinois to Australia with flexible booking policies on momondo?

Flights from Illinois to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to Australia?

momondo provides multiple filters to help you find the best flight to Australia from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to Australia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Australia, momondo offers a useful price alert feature which will track prices for flights to Australia from Illinois and alert you when they change.

An easier way to manage your Australia trip

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