I'm a bit of the opposite, I love flying, even went to school at an early age to learn HOW to fly so iv been up there as a passenger and a pilot (sorta, i stopped paying for lessons when it got too expensive for the family)
My mom is a very nervous flyer though, even now, after she's had dozens of flights for work and trips etc. I think for her it helps if she has an aisle seat, she also will take travel sick medication that makes her drowsy.
Someone once told her that a big reason people fear flying, is the lack of control, after that she started drilling me with questions about how airplanes flew and what this or that button did or what caused turbulence etc. xD That actually seemed to help her a bit, knowing the ins and outs of things. :p It also might help to know, that Airplanes actually WANT to stay in the air, they are built so aerodynamic that even if an engine or prop is lost, that it will continue gliding through the sky, dropping in altitude horizontally allowing the pilot to find a place to land. Even when I was still in school at age 16, we were up in a small cessna and my instructor completely killed the engine and we just glided there for a few minutes like a kite until he started it back up, it was probably one of the most liberating moments of my life. :p