I was in the PLC program while serving as an NCO in the Marine Reserve. Completed PLC jr. course at Quantico but left the program when my enlistment contract ended and I left the Marines. (Best choice I ever made. But that's another thread.)
When you say, "duty station", are you on active duty? If you are, only programs like ECP and MECEP are available to you.(ECP is for Marines who already have a degree.) The PLC program is not available to active duty Marines, that's what MECEP is for. Just like dukeflr said, PLC is for civilians and reservists, NROTC for civilians.
In PLC, you attend college and go to an event or two per month sponsored by the OSO shop. No uniforms or military classes, and you go to Quantico for either two six week sessions during the summers between your sophomore and senior years or to a single ten week course summer before your senior year, depending on when you contract. You are commissioned upon graduation providing you have completed all of OCS. Air contracts are available.
In my opinion based on 8 years as an enlisted Marine, if your goal is simply to fly, look elsewhere. If you want to be a Marine officer, go be a Marine officer and maybe you'll get to fly something. Joining a Marine officer program because all you want to do is fly is like joining the Air Force because all you want to do is be an infantryman.
I did my time, decided flying was my priority, now I'm in the Air Force trying to get a slot. I wish I had decided to go this route a long time ago...