I remember this happening to a couple of airline pilots here. I can't remember the airline, but I think they were flying from San Diego to Minneapolis, overshot, and had to fly back.
Airplane pilots doze off while flying 37,000 feet in the air: 'Deeply concerning'
Two pilots have been removed from operating planes until review is completed after they both fell asleep during a flight from Sudan to Ethiopia at 37,000 feet in the air.
www.foxnews.com