An hour will probably be plenty for PSP
. Keep in mind if you leave at the same time as a lot of other flights, security could be excessively long, but in my experience it never takes more than 15 minutes. If it's not a peak time, then you'll literally walk through. From curb to gate very rarely takes more than 20 minutes, and can be as little as 5. There isn't much to eat past security, but there is a restaurant/bar that is decent just before security. There is free wifi throughout the airport.
If you're coming from Indian Wells/Palm Desert/Rancho Mirage, give yourself plenty of time to drive to PSP
. I would say 45 minutes just to be safe. Rental car return shouldn't take long at all and is right next to the terminal. PSP
was my home airport for 6 years and I loved it, but I haven't flown out in the last year, so things might have changed a little (I doubt it). It's a very smooth airport operations wise, and a pleasant place to travel through.