I know a few frum (hobbyist) pilots, I'm even related to one
I also met a Shomer Shabbos fellow who flew (international?) for Delta, this was like 8 years ago, should've kept in touch.
How many hours of flying do you need till you become a pilot that can fly for Commercial airlines?
It's much more complicated than that, besides for tons of hours you need to get lots of training and certification, there are lots of levels in between the most basic pilots license and piloting A380s.