Ok I'm terrified of flying, and the fear makes me sick. I spent much of my last flight throwing up.
However, I have found one tactic that really helps:
Focus on the flight attendants. Really study them. They are people like me and you! Look, this lady has a wedding ring. She might have kids. This man looks bored, and is stifling a yawn.
Why would someone with a husband, kids, a whole life, risk flying multiple flights per day, several days a week if it was dangerous? They dont get paid much - look it up. Not enough to risk your life for.
The man who looks bored at work? How can he be bored if every flight is risking his life?
I have spoken to the flight attendants and asked them how many flights they have done that day. On a flight to Dublin the man answered five! And he still had to fly home later on.
I was in such a state on one flight that I was actually invited to meet the pilot. He was a nice, intelligent man who certainly looked as though he had no desire to die.
I hope this helps you (or someone else reading). It has saved my sanity before now.