aletsch glacier

Are you talking about from the top of Eggishorn down to Fiescheralp? I have only done it in reverse (hiked up, rode down) but it wasn't long. We started from Bettmernal so have to add that time too in my recollections, but we were up on top of Eggishorn for lunch. So I think between one and 2 hours, but I don't recall for sure. If you have a full day, I highly recommend hiking down to the Märjelinsee and beyond, to the point where you are right alongside the glacier. It is spectacular. http://en.wikipedia.org/wiki/File:Aletschgletscher_M%C3%A4rjelensee.jpg You can hike back to Fiescheralp by means of a tunnel through the ridge, and a road that winds along the steep hillside.

yes, from the top of eggishorn to fiescheralp

also, how long is cable car ride from fiescheralp down to Fiesch?

I haven't done it and don't want to be thought to be Steve-ing you but since nobody else answered I took 2 seconds and composed a Google search of 3 words "seilbahn fiescheralp Fiesch" which came back with the result http://www.eggishorn.ch/jwa/en/home.jsp If you go there you can click on the second button down on the left, click on the timetable and not only does it say how long the ride is but when it goes.

SBB has the schedule. It says seven minutes from Fiescheralp down to Fiesch.