A method of forming a flexible display apparatus includes: forming a flexible substrate on a support substrate; forming a light-emitting diode on the flexible substrate; forming a first encapsulation layer on the light-emitting diode; forming a second encapsulation layer; bonding the first encapsulation layer to the second encapsulation layer using an adhesive layer between the first encapsulation layer and the second encapsulation layer; separating the support substrate from the flexible substrate and cutting the flexible substrate to form the flexible display apparatus; and forming a polarizing plate on the second encapsulation layer.