The penguin has spent several weeks at Massey University's wildlife centre, where it was treated for multiple lacerations, including a deep gash to one leg.
Ms Young thanked Air New Zealand for flying the penguin home, and looking after it on the way, assisting with a flight change at Christchurch.
The penguin would take another month to fully recover, at Penguin Place on Otago Peninsula, before being released to the wild. The adult bird's gender is unknown.