I'd say taking a flight is
more than "slightly" safer than riding a car. Air accidents and fatalities happen at a much lesser frequency than road traffic accidents and fatalities.
Even so, one's most likely death from any cause is
not going to be found on the road. Depending on one's sex and age group, the most likely causes include the classics such as ischaemic heart disease, complications from Alzheimer's/dementia, cancer, and for the young 'uns like myself, accidental poisoning and suicide are more likely ends.
I know you hate cars, but it's a bad idea to let your emotions blind you to the facts.