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Cheap flights from Illinois to Perth from $1,062

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 Perth departing on 21/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Illinois to Perth

Cheap return flights

Enter your travel dates to find the best prices.
Qatar Airways Logo
07:00 - 18:45
STL
-
PER
45h 45m
2 stops
Qatar Airways Logo
22:45 - 23:59
PER
-
STL
39h 14m
2 stops
$2,233Qatar Airways
Tue, 1 Dec - Sat, 5 Dec
Multiple Airlines Logo
08:40 - 21:40
STL
-
PER
48h 00m
2 stops
Multiple Airlines Logo
13:15 - 14:02
PER
-
STL
61h 47m
2 stops
$2,474Multiple Airlines
Tue, 30 Jun - Wed, 22 Jul
United Airlines Logo
06:01 - 12:30
STL
-
PER
41h 29m
3 stops
United Airlines Logo
15:30 - 18:17
PER
-
STL
39h 47m
2 stops
$2,528United Airlines
Tue, 30 Jun - Wed, 22 Jul
American Airlines Logo
15:20 - 11:15
ORD
-
PER
30h 55m
2 stops
American Airlines Logo
23:45 - 15:53
PER
-
ORD
29h 08m
2 stops
$2,701American Airlines
Fri, 18 Sep - Sun, 27 Sep
Qantas Airways Logo
15:14 - 12:05
ORD
-
PER
31h 51m
2 stops
Qantas Airways Logo
11:35 - 06:26
PER
-
ORD
31h 51m
2 stops
$2,712Qantas Airways
Fri, 16 Oct - Sun, 1 Nov
American Airlines Logo
15:21 - 13:35
ORD
-
PER
33h 14m
2 stops
American Airlines Logo
23:45 - 15:54
PER
-
ORD
29h 09m
2 stops
$2,718American Airlines
Sun, 2 Aug - Sun, 9 Aug
American Airlines Logo
15:14 - 12:05
ORD
-
PER
31h 51m
2 stops
American Airlines Logo
22:35 - 17:45
PER
-
ORD
33h 10m
2 stops
$2,719American Airlines
Fri, 16 Oct - Sun, 1 Nov
American Airlines Logo
15:00 - 12:25
ORD
-
PER
31h 25m
2 stops
American Airlines Logo
22:35 - 16:54
PER
-
ORD
32h 19m
2 stops
$2,726American Airlines
Sat, 7 Nov - Tue, 15 Dec
Qatar Airways Logo
19:20 - 11:55
ORD
-
PER
27h 35m
1 stop
Qatar Airways Logo
14:20 - 15:05
PER
-
ORD
37h 45m
2 stops
$2,729Qatar Airways
Fri, 18 Sep - Sun, 27 Sep
Qantas Airways Logo
20:14 - 13:35
STL
-
PER
76h 21m
3 stops
Qantas Airways Logo
10:35 - 08:46
PER
-
STL
35h 11m
3 stops
$2,817Qantas Airways
Tue, 30 Jun - Wed, 22 Jul

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Qatar Airways flights from Illinois to Perth

Our best Qatar Airways deals on Illinois to Perth flight tickets
Qatar Airways
1 Dec
STL07:00Lambert-St Louis
45h 45m
2 stops
PER18:45Perth
5 Dec
PER22:45Perth
39h 14m
2 stops
STL23:59Lambert-St Louis
$2,233
Qatar Airways
18 Sept
ORD19:20Chicago O'Hare Intl
27h 35m
1 stop
PER11:55Perth
27 Sept
PER14:20Perth
37h 45m
2 stops
ORD15:05Chicago O'Hare Intl
$2,729
Qatar Airways
16 Oct
ORD19:20Chicago O'Hare Intl
34h 15m
1 stop
PER18:35Perth
1 Nov
PER13:20Perth
39h 10m
2 stops
ORD15:30Chicago O'Hare Intl
$2,769

American Airlines flights from Illinois to Perth

Our best American Airlines deals on Illinois to Perth flight tickets
American Airlines
18 Sept
ORD15:20Chicago O'Hare Intl
30h 55m
2 stops
PER11:15Perth
27 Sept
PER23:45Perth
29h 08m
2 stops
ORD15:53Chicago O'Hare Intl
$2,701
American Airlines
2 Aug
ORD15:21Chicago O'Hare Intl
33h 14m
2 stops
PER13:35Perth
9 Aug
PER23:45Perth
29h 09m
2 stops
ORD15:54Chicago O'Hare Intl
$2,718
American Airlines
16 Oct
ORD15:14Chicago O'Hare Intl
31h 51m
2 stops
PER12:05Perth
1 Nov
PER22:35Perth
33h 10m
2 stops
ORD17:45Chicago O'Hare Intl
$2,719

momondo Fare Finder

 
Customise your flight search to find flights from Illinois to Perth 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 14 June 2026.
Use the filters below to find and compare flights from Illinois to Perth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 1/12

07:00-18:45

2 stops45h 45m

Perth

Sat 5/12

22:45-23:59

2 stops39h 14m

$2,233

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 30/6

08:40-21:40

2 stops48h 00m

Perth

Wed 22/7

13:15-14:02

2 stops61h 47m

$2,474

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 30/6

06:01-12:30

3 stops41h 29m

Perth

Wed 22/7

15:30-18:17

2 stops39h 47m

$2,528
Fastest return journey

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 18/9

15:20-11:15

2 stops30h 55m

Perth

Sun 27/9

23:45-15:53

2 stops29h 08m

$2,701

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 16/10

15:14-12:05

2 stops31h 51m

Perth

Sun 1/11

11:35-06:26

2 stops31h 51m

$2,712

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 2/8

15:21-13:35

2 stops33h 14m

Perth

Sun 9/8

23:45-15:54

2 stops29h 09m

$2,718

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 16/10

15:14-12:05

2 stops31h 51m

Perth

Sun 1/11

22:35-17:45

2 stops33h 10m

$2,719

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 7/11

15:00-12:25

2 stops31h 25m

Perth

Tue 15/12

22:35-16:54

2 stops32h 19m

$2,726

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 18/9

19:20-11:55

1 stop27h 35m

Perth

Sun 27/9

14:20-15:05

2 stops37h 45m

$2,729

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 30/6

20:14-13:35

3 stops76h 21m

Perth

Wed 22/7

10:35-08:46

3 stops35h 11m

$2,817

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Perth from

How to get the cheapest flight ticket from Illinois to Perth

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

Can stopping save me money on Illinois to Perth flights?

You could potentially save up to 14% on your flight if you consider stops on a Illinois to Perth flight.

Cheap Illinois to Perth flight deals and tips

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

Fastest flight time

26h 20m

Direct flights

None
The fastest flight from Illinois to Perth takes 26h 20m
There are no direct flights from Illinois to Perth. There are no popular flight routes from Illinois to Perth.
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Frequently asked questions about flying from Illinois to Perth

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

    Prices for flights from Illinois to Perth Airport were last updated today.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Perth Airport.

  • What documentation or ID do you need to fly to Perth Airport?

    The necessary travel and health documents for your Perth Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Perth?

Book flights to Perth if you plan to visit one of these locations
Mandurah
Fremantle
Scarborough
Rottnest Island

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Perth. momondo saves you time and could save you money on your trip.

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

All flight searches from Illinois to Perth on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Perth 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 Perth right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to Perth flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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