Later that year, La Malfa fled Italy to escape arrest, only to return to Rome in order to take part in the resistance movement with the Partito d'Azione and the Comitato di Liberazione Nazionale.
Later that year, La Malfa fled Italy to escape arrest, he went to Switzerland, where he had contacts with representatives of the British Special Operations Executive. Later he returned to Rome in order to take part in the resistance movement with the Partito d'Azione and the Comitato di Liberazione Nazionale.