Skywest: All Brasilia bases are junior to to even the most junior CRJ bases for FOs.

Brasilia: SFO, FAT, PSP. It's just about a 3 way tie for most junior. Typically FAT is always the most junior and SFO fluctuates.

CRJ: MSP, ORD, COS, IAH in that order. The most junior lineholder is around 1.5 years seniority in MSP.