Mine is about 17 - 19 miles one way, depending on whether I take the car on the freeway or the bus which is more direct. Bus takes 50 minutes, and I bike an additional mile at each end - total time about 65 minutes. Car takes 35 minutes and I work 7 - 4 to avoid some of the traffic. My company subsidizes the bus pass so it costs me $19 a month for unlimited Metro LA bus trips.
My daughter is at a Cal Poly, 40 miles one way in the opposite direction to my work, but she only drives Monday morning and Friday night, and lives in the dorm mid-week. Once she graduates next summer, I plan on moving closer to work - still along the bus line, so my son can get to community college, but a more bikeable distance.
My 19 year old son rides an Italian Benotto road bike to community college and his part time job - max about 3 miles one way.