Lets start with some hard facts.
UK Fatal accident rate in certified light aircraft - about 1 per 70,000 hrs.
Ditto microlight, gliders, light helicopters - about 1 per 50,000 hours
Ditto homebuilts - about 1 per 34,000 hours
Ditto Gyroplanes - about 1 per 6,000 hours.
On British roads, about 3,500 people are killed each year.
Starting with driving, there are about 60 million of us in this island, and I think we can assume virtually nobody fails to go near the road or travel by car. So, in a given year that gives a risk of about 1 in 1700 of any of us dying in a car-crash in any given year.
At the fatal accident rate for certified light aircraft (your typical club Piper) you'd have to fly about 41 hours per year to hit the same probability of death. In a microlight, glider or helicopter about 30 hours.
So, speaking for myself in an average year I drive regularly, fly about 40 hours in light aircraft and around 60 hours in microlights. That means I'm about 3 times as likely to die flying as I am driving, but from all three my risk of being killed in any given year is about 1 in 400.
Put otherwise, in, let's say a reasonably active 50 year career of flying and driving, I'll at the end have had an overal risk of about 1 in 34 of being killed in or by a car, about 1 in 35 of being killed in an aeroplane, and about 1 in 17 of being killed in a microlight. This adds up to about a 1 in 8½ chance of failing to reach 70 due to one or t'other.
Dangerous world we live in isn't it !
Of-course, as others have said, the odds are just an average. We can all do a great deal by the way we behave to improve or worsen the odds by the way we carry out all our activities, whether it's flying, driving, eating, smoking, etc. etc. At the end of the day, the statistics only really apply to the whole population not to any one individual.
G