Having already secured final spots in the League Cup and West Wales Cups Saturday's win in Llanelli secured a second Welsh Cup final place for Mark Jones' side.
Jones said, "It's tremendous for a club that has suffered bad times recently and I'm absolutely delighted.
"It was thoroughly deserved. We dominated 80 per cent of the game and the winning goal by Kevin Ahearne-Evans would not have been out of place at Anfield."
Carmarthen's goal came in the 67th minute - Luke Hardy's arrowlike corner finding the Aherne-Evans' whose flick on redirected the ball into the back of Lee Kendall's net.
Haverfordwest player-manager Deryn Brace had no complaints
about his side's defeat.
"I've got no qualms about the result. I want to give
"It was men against boys and it hurts me to say that as I'm always a great advocate for my players, but we were very poor today."