That's the job of the MSM in their endeavors in informing the public.
I'd wager the automobile is more survivable.
Why?
The plane has far more critical components that are likely to fail, and likely to lead to a fatal disaster, as a result, should they happen, than the car.
That's why cars don't require annual, 100 hour, 200 hour, 300 hour, 600 hour, 1000, 1200 hour, 5000 hour, 10,000 hour tear down inspections and tractability guaranteed on every part replaced on them.
Like always, statistics can be designed to "favor" a viewpoint.
For starters, most often, you're worried about controlling motion in two dimensions in a car, instead of the additional headache of the third dimension, on a flying plane. Add to that the field of gravity...
What I'm trying to say is that one would have to take several times more rides on a car to meet with an accident statistically, than on a plane. People don't fly as much as they drive.