I was surprised to see that Big Sky has scheduled several flights from Salt Lake City tomorrow. They ceased operating in March. No aircraft types are listed.
I suspect a glitch. The routes/flight numbers look a lot like SkyWest Brasilia routes (SLC-EKO, SLC-PIH, SLC-SUN), but come up as BSY3580 instead of SKW3580.
Come to think of it, the corresponding SkyWest flights are not listed as scheduled. Only CRJ flights are listed.