Singapore doesn't observe daylight saving time but Portland does. DST in Portland started on 10 March 2019 and will end on 03 November 2019. Once DST ends in Portland the time difference between Portland and Singapore will be 16:0 hours.
Time zone: PDT - Pacific Daylight Time (UTC/GMT -7)DST started on 10 March 2019DST will end on 03 November 2019Time zone difference / Flight distance
Time zone: SGT - Singapore Time (UTC/GMT +8)Time zone difference / Flight distance