Car deaths in 2024 in America: 44k as per the National Safety Council

Flu deaths in 2024 in America: 45k as per the CDC, but 2024 was higher for flu deaths than some other years.

So it varies, but in North America the number of people who die from flu vs. car accidents is between 60 and 102% as likely.

Car deaths are much higher in some countries than in others, and the same applies to flu deaths, but in places where people are flying more miles are going to have good enough health care to deal with the flu and have traffic safety laws that bring the risk down to the level of flu deaths.

Edit: just saw your edit so looks like we're mostly on the same page. But even in the EU, do you really think most of them realize that you're only twice as likely to die from as car crash as you are from the flu?