Lindsay Lohan -- Bailed Outta Lynwood ... Again

Lindsay Lohan just walked through her own personal revolving door -- the exit way at Lynwood Correctional Facility -- after a bondsman put up the cash to spring her. 

According to the L.A. County Sheriff's Department's website ... LiLo was in custody for almost five hours and her bail was set at $75,000.

Lindsay rode out in a black SUV, with a Sheriff's vehicle leading the way.