My process is kind of spread out, but it usually takes 2-4 days before a page is complete. Sometimes it can take even longer due to the page being difficult, headaches (as I'm prone to them) or other life things.
Usually my schedule goes like this -
Sunday night : Sometimes I may refine the script of the current and/or next few pages to make sure I'm happy with everything, but either way I sketch out the page on this night. If I'm busy this part may be done on Monday instead.
Monday: Clean up sketches and ink as much of the page as I can. If things are going well, maybe do a bit of flat coloring.
Tuesday: Finish up inking and do flat coloring. If things are going well, I might even get a lot of the page done or completely finished this day...but usually...
Wednesday: This is when I do all the shading, detailing, editing, and then add in text. YAY, FINISHED.
Inking, refining and complicated backgrounds are what takes the longest with me. Kind of hate those parts. .__. I feel like I'm incredibly slow at this, actually...I use to pop out two pages a week and now I wonder how the heck I used to do that...