If you have already booked your ticket from Singapore Airlines for Phnom Penh but still need their office address, then here is your Singapore Airlines Phnom Penh Office address: Unit 2-4A, Regency C, Samdech Monireth (St. 217) Tomnoubteok, Kh—Chamkamon Phnom Penh Kingdom of Cambodia. For more updates click on our website.