Dubai doesn't observe daylight saving time but Porto Alegre does. DST in Porto Alegre started on 04 November 2018 and ended on 17 February 2019. When DST is observed in Porto Alegre the time difference between Porto Alegre and Dubai is 6:0 hours.
Time zone: BRT - Brasilia time (UTC/GMT -3)DST started on 04 November 2018DST ended on 17 February 2019Time zone difference / Flight distance
Time zone: GST - Gulf Standard Time (UTC/GMT +4)Time zone difference / Flight distance