The only regional I'm aware of with exclusively day trips is Cape Air. But it definitely is no 9 to 5, and you would have to relocate to one of their domiciles to be 'home' every night. Commuting is not really possible here. Silver advertises day trips too but who knows how senior you would have to be to hold that. If you want to work 9 to 5 and be home every night, I suggest being a CFI