First of all, when you're the CEO of what, 5 companies at the same time? you're probably not working that much. Or being a CEO should be a part time job, 20% of regular working hours.

Secondly:

Twitter is in San Francisco, Neuralink is in San Francisco, Tesla is in Austin, The Boring Company is in an Austin suburb, SpaceX is in the LA metro area.

I'm quite sure there are regular commercial flights each day between Austin, San Francisco and LA.

Let's be real here, he just uses a private jet because it's cool and convenient.