You're being a little too specific here. The bottom line is that you must be a Commissioned Officer to be a Marine rotary-wing aviator. As such, any of the pre-commissioning programs (USNA, NROTC, OCS) can get you there. The majority of Marine Aviators are from NROTC, as that is where the majority of Marine Officers come from. Your major is essentially immaterial, and just because you major in some sort of aviation program does not mean that you will be selected to become a Naval Aviator. The only way they are going to pay for your college tuition is if you receive a NROTC (Marine Option) Scholarship; if you do not get a scholarship, then you get to pay for it. The only thing that a scholarship does for you is pretty much guarantee that you will go active duty. For a regula commissionee, your contract is for 8 years, usually divided up between four years active duty and four years in one of the reserve components (USMCR or IRR). Your active duty time will increase if you take specialized training, i.e.: aviation.
