The overnight service is expected to improve connectivity between the two cities, with a journey time of around 16 hours. Vande Bharat Sleeper train service between Bengaluru and Mumbai launched, set to improve rail connectivity and reduce travel time between the two cities. Bengaluru: Railway Minister Ashwini Vaishnaw on Sunday flagged off the Vande Bharat Sleeper Express connecting Bengaluru and Mumbai from Sir M. Visvesvaraya Terminal (SMVT) here on the occasion.