England were well in control for the majority of the game but, as with most teams that have faced them, found the disciplined Dutch defence hard to break down.
Things changed in the 61st minute when Kelly Smith, of the Boston Breakers - which sounds more like a Lincolnshire scrap yard than a football team - swept home Eniola Aluko's cut back.
With Holland momentarily on the back foot England failed to capitalise and the Dutchesses (come on, it makes sense!) equalised three minutes later through Marlous Pieete.
England took control of the game once again but two unsuccessful penalty appeals and a sitter missed by Chelsea's Lianne Sanderson meant that the game remained 1-1 until Scott's late intervention.
The Evrton midfielder came on at the start of extra time in place of Leeds Carnegie's Jessica Clarke to add some much needed height up front.
And it proved to be a masterstroke as the 22-year-old rose highest to meet Karen Carney's corner and head England into the final.
Scott thought that she had missed he chance when she failed to connect properly an eariler effort but was delighted to have netted the winner.
Scott said: ""There was one before that which hit my shoulder and I thought, 'Oh, God!' I managed to get my head to it and thankfully it went in."
England will play the winner of today's semi final clash between Norway and Germany in the final to be held at Helsinki's Olympic stadium on Thursday.