This however is implying that the distance traveled is the metric to measure against, which might skew data. It plays a role, but in aviation, other factors play important rules as well, like starts, landings, touch-and-gos, bad weather conditions flying hours, (as opposed good weather flying hours which relates to distance traveled) and so on. For military aircraft, even more metrics might exist, like contour flying hours, desert flying hours and whatnot.

If (accidents / distance traveled) was the only important metric, the safest means of transport would possibly be space travel.