Home Postcode finder WA Flynn Flynn postcode WA Flynn is a locality in Western Australia covered by postcode 6302. Postcode 6302 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Flynn business listing Be the first listing in Flynn Common questionsWhat is the postcode for Flynn?Flynn, WA has the postcode 6302.What state is Flynn in?Flynn is in Western Australia (WA).Does postcode 6302 cover more than one suburb?Yes. Postcode 6302 covers 23 localities, so the postcode alone does not identify Flynn. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.