Kammala jumla mai zuwa: Bayan nasarar gasar zakarun Turai, kakar 2014-15 ta ga Casillas ya dawo ya zama mai tsaron gidan farko na kulob din, duk da gasar daga sabon zuwan Keylor Navas, yayin da ya ci gaba da lashe gasar UEFA Super Cup, tare da Real Madrid ta doke Sevilla 2-0 a ranar 12 ga Agusta 2014. Daga nan kuma ya lashe gasar
FIFA Club World Cup daga baya a waccan shekarar, yana buga wasan 700 na Madrid a ranar 20 ga Disamba, 2014, a wasan karshe na FIFA Club World Cup na 2014, yayin da Real Madrid ta doke San Lorenzo 2 <unk> 0. A watan Mayu na 2015, Casillas ya buga wasan kusa da na karshe na gasar zakarun Turai da Juventus, inda tawagarsa ta yi rashin nasara da 3-2.