There have been 20 commercial aviation incidents in the last 20 years in the US of any type and size that included any fatalities by any means. 7 of those included jets, with 1 being a 777, one a 767, and everything else 737 or smaller. A 767 costs about 100 million (list price 200, but the internet says you always get discounts..?)

So we'll ridiculously overestimate the per year cost of airplanes at 100 million, assuming fallaciously that these airplanes are always totaled (they're not) and that they're always 767s (they're not).

On the other hand, let's assume (optimistically) that fatal car crashes always total two people per car, and that they all occur in affordable $10,000 cars (the average new car last year cost almost 5x that at 47K). That gets you 10,000*20,000, or 200 million per year in auto costs.