You're always one of the people who flew on the plane.
In that case it's always 50%.
Now if the question was there are n total flights and you are scheduled to get on a random flight, the probability you croak appears to be n/[2^(n+1)-2].
So if n is an infinite number of flights, that converges to zero.
You wish to fill Lionel's coffers? Yes, ha, ha, ha, yes!!!