Amtrak operates a train from Santa Barbara to Northridge 5 times a day. Tickets cost $27 - $55 and the journey takes 1 h 49 min. Alternatively, Greyhound USA operates a bus from Santa Barbara to Northridge once daily. Tickets cost $15 - $35 and the journey takes 2 h 25 min.
From Santa Barbara Amtrak train to Chatsworth Station then bus to Nordhoff / Reseda. 2 h 31 min $41. From Santa Barbara, CA bus to Magnolia / Lankershim then bus to Roscoe / Reseda. 3 h 47 min $17. From Santa Barbara drive to Northridge. 1 h 23 min $9.