So I have a planet that is slightly larger than Earth, orbits an orange star slightly closer than earth orbits the sun, has extreme weather patterns and volatile tectonics. It has bad storms, temperature extremes, radiation storms, intense magnetic fields, high winds, you name it. Obviously the planet is very dangerous to live on, and even more dangerous to travel across. However, I need something a little more than dangerous for my purposes.
I want to ensure that air and space travel are both exceedingly difficult and dangerous, to the point that space travel is all but impossible, and air travel is considered almost as good as suicide. So obviously the dangerous weather and unpredictable radiation is a downside but I would like to know if I'm missing something here. What could make air travel on a planet so dangerous that it would be effectively non-existent?