FLAPSSET,
I'd have to guess but I can't see the visa program requiring a dedicated "aviation" degree in this circumstance. Skywest itself doesn't mention a degree as a requirement at all. In fact, most regionals here either don't mention it or list a degree as "preferred".
This, as you've likely seen, from the visa requirements:
"...and at least the attainment of a bachelor's degree, or its equivalent, as a minimum for entry into the occupation in the United States."
With typical fuzzy government-speak, it's hard to know what "...or its equivalent..." means...sounds like a bit of wriggle room there. Skywest has likely noodled this out with the our kakistocracy.
Maybe the OP could shed some light on this ?