Yup! I know pilots (now Colonels) who graduated with degrees in the Culinary Arts from the Illinois School of Art in Chicago and the Art Institute of Seattle.
Just need that degree from a 4 year Institution! No degree, no Commission, no Aviation Contract, no Flt School.
Then again, you can fly with the US Army as a Warrant Officer (don't really need a college degree) and become just as good a pilot, you just won't be a Marine.
Summary: USMC, USN, USAF = need a 4 year degree = Commission = Flt School
USA - Warrant Officer Program, no college degree needed, not a Commissioned Officer (eventually you could get a commission, if you want one and upgrade your education and such), but you still go to Flt School.