He established the Futurist movement in Turin in 1923 at the age of 19 with a group which included Nikolay Diulgheroff, Pippo Oriani, Enrico Alimandi, Franco Costa and the sculptor Mino Rosso.
He became an exponent of L'Aeropittura (Aeropainting), the dominant Futurist style of the 1930s which applied the experience of flight to the depiction of landscape aerially; the world was no longer seen from the perspective of the person on the ground but as if from an aeroplane.
[3] Enrico Crispolti says that Fillìa and his colleagues in Turin explored an interior, psychological and subjective world, unlike other Futurists of the period such as Prampolini and Depero.
The ectoplasmic forms which appear in Fillìa's paintings of the late twenties and early thirties contrast with the rigidity of his earlier work and were taken up to explore the subconscious.
[7] Fillìa's activities as an organizer and polemicist, which he continued through his contact with the avant-garde in his numerous trips to Paris, ended with his death at Turin in 1936 at the age of thirty-two.