The Wizard of Wishaw ran out a 6-1 winner with breaks of 76, 125, 74 そして 98.
Higgins was in ruthless form at the Venue Cymru, Llandudno where he cruised to a fifth win in six meetings with his old rival in 2021.
Scotland’s four-time world champion, who has never won the Scottish title, rattled in breaks of 76 そして 125 to race into a 3-0 鉛.
O’Sullivan stopped the rot with the aid of an 86 break but Higgins continued his impressive form with breaks of 74 そして 98 to run out a comfortable winner.
“I did get a bit of a run of the ball but you take them because sometimes it goes against you,” Higgins said on Eurosport.
Higgins, 誰が持っている 31 ranking titles to his name, had battled back from 3-0 down to beat David Gilbert 5-3 in the quarter-finals and said that fightback helped inspire Saturday’s performance.
“I think it helped yesterday, the way I came back against Dave ” he said. “I felt I was beginning to hit through the ball a lot better and I just took that into today’s game.
“Even when I lost the fourth frame, I was disappointed but I was thinking to myself it may be better to be 3-1 よりも 4-0 なぜなら, if you go 4-0 アップ, you’re thinking ‘it’s mine to lose now’, whereas at 3-1 I was still focused, it’s still a 50-50 game.”
Higgins is through to his fourth final of the season and, having lost in the deciders of the English Open, Northern Ireland Open and Champion of Champions, he will hope to go one better against either Anthony McGill or Luca Brecel on Sunday.
Higgins was runner-up in the inaugural year of the Scottish Open in 2016, 負け 9-4 to Marco Fu in the final.