It was Arsenal's third successive FA Cup triumph, their ninth in total and their 29th major trophy in just 16 years.
Having just sealed their fifth successive Premier League title and having suffered only one defeat in more than two years of domestic football, Arsenal came into the game as favourites.
[3] Arsenal dominated from start to finish, with Smith and Sanderson both drawing saves from Carly Telford in the opening 10 minutes.
Karen Carney was also denied from close range on the quarter-hour mark, while Alex Scott was thwarted by a double save by Telford after Smith had put her through with a defence-splitting pass midway through the first half.
Smith tapped in her second goal seven minutes from time after Fleeting's shot had rebounded off a post.