I'm like Carrie Ann - it totally depends on where I'm going.
Out to run errands, give me 15 minutes to throw on some clothes, splash water on my face, brush my teeth and put my hair in a pony tail.
If I'm just going out with friends, or over to a friend's house, I put on the barest of make up and toss my hair in a clip. Maybe 20 or 30 minutes.
But if I'm going someplace and I want to put on make up, do my hair and dress cute, it will take more time. Depending on how decked out I get, anywhere from 1 hour to 2 or more. Also, I like to take my time when I get ready and not rush - so I'll fix my hair and go do something else for a bit... then come back and do my make up and then take a break... and so on.