On 18 January 2013, Mehmet terminated his contract with Perth Glory in the A-League after agreeing to sign with Thai Premier League side Bangkok Glass. Billy Mehmet scored in his first pre-season match for Bangkok Glass vs Singapore Armed Forces in a 3–1 victory at the Leo Stadium. Mehmet made his league debut for Bangkok Glass on 3 February 2013, losing 1–0 to Songkhla United.
