Un Neutred Male cat gone missing 2 days ago.?

He is an indoor/outdoor cat and gets let out in the morning then usually comes home at night. However he did not come home one night. I have checked with my neighbours if they had seen him and the neighbour said he saw him chasing a female cat (in season) but apart from that no luck. Is there a chance he could be wondering for a mate? He usually stays in the neighborhood but could he venture farther and longer for a female? Please only serious answers, or educated ones would be best. Cheers