The wing venation doesn't fit with Musca domestica, Max. Vein M1 runs straight ahead to the wing apex in the fly in your photo, whereas in Musca and all other calyptrate flies it curves distally. The one exception is the calyptrate family Anthomyiidae, in which that vein does run straight ahead. Some members of this family do otherwise look like Musca. But I can't positively identify your fly as one of those.