About 3 weeks or 14 days.
First week is Ground Week 5 days. Second Week is Tower Week (thats where the sissy's usually chicken out), 5 days as well, and then Jump Week. You jump on Monday Tuesday and Wednesday, with Thursday as a rain day.
Do it you'll love it ...... and this is coming from an Air Force guy!
http://www.benning.army.mil/airborne/airborne/