Should Virgin, Qantas shareholders be worried about Koala Airlines entering the market?

Australia’s two aviation heavyweights, Qantas Airways Ltd (ASX: QAN) and Virgin Australia Holding Ltd (ASX: VGN), could face stiff competition from a new budget airline, Koala Airlines.

What is Koala Airlines, and where did it come from?

The new budget airline carrier plans to launch and begin…