Singapore Airlines' Frankfurt city office is at Hahnstraße 31-35, 60528 Frankfurt/Main. They also operate at Frankfurt Airport Terminal 1, Hall C, counters 704–709, for check-in only. Contact the service center at +1-866-829-1086 (German: Mon-Fri, 8 a.m.–6 p.m.; English: 24 hours daily). Jauntlet.comhttps://jauntlet.com/