Who owns the airplanes of an airline?

American Airlines for example has almost 1,600 airplanes in their fleet. Does that means there's someone out there that owns almost 1,600 jetliners?

Can I have a companion for premier access United Airlines?

I'm 17 and I bought a first class ticket which included many privileges, one of them being premier access. I know for boarding I probably can't, but for security lane would it be okay? I'm traveling with my mom who decided to stick to regular economy so I don't want to be separated from her for a long time and I really don't want to let my privileges go to waste- I did spend a lot on it.

American Airlines No-Show?

I bought an American Airlines ticket a few weeks ago One-Way for May 30th, due to unfortunate instances I have to reschedule my flight to the 21st. I paid $149 for my ticket on the 30th. When I checked on reservations and attempted to have my flight changed, I realized that in order to change my flight I would have to pay $184 plus the $200 for changing flight fee which ultimately costs me an extra $384. I found another ticket a few days later of the 21st costing $125. I'm thinking that instead of paying the $384 for the flight change, I do a "no-show" to my flight on the 30th and just purchase the ticket that costs $125. What I'm unsure of is if American Airlines has a "no-show" policy that will then try to charge me for missing the flight. Will American Airlines charge me for not showing up to my flight?