MH 2324080 Economy KHR SIN Singapore SG Singapore REP Siem Reap KH Cambodia airfare.com 2009-12-10T00:00:00Z VN 2796420 Economy KHR SIN Singapore SG Singapore REP Siem Reap KH Cambodia airfare.com 2009-12-10T00:00:00Z PG 3849780 Economy KHR SIN Singapore SG Singapore REP Siem Reap KH Cambodia airfare.com 2009-12-10T00:00:00Z