In my experience LAS is one of the easiest airports to commute to if you’re coming from another west coast city. High frequency from most major cities, mostly mainline operations, very little competition for the jumpseat (just a few NK and SWA commuters), and weather is very rarely if ever an issue. I was planning on moving to base when I first came here but decided to just stay put and commute because it has been so painless. I’m not a PHX or DFW commuter so I can’t speak to those specifically but I’ve flown with quite a few PHX commuters and most seem to think it’s pretty easy as far as commutes go.