You're conflating two different issues, one question is are car crashes more common than planes? (which is a big yes) and second question is which accident is more fatal? (A plane crash).
Did you read this post?
Ever ride in a car? Your chances of dying in a fiery car crash are significantly higher than dying in a plane crash.
http://reason.com/archives/2006/08/11/dont-be-terrorized
Chance of dying in a car crash= ~1 in 83
Chance of dying in a plane crash= ~1 in 5000
It doesn't say "chances of having a car/plane crash". It says chances of dying in one. So everyday that you get in a car you have more chances of dying than when you get on a plane. And yet people get in cars every day.