Most trips in STL from what I see may or may not be commutable. Some months I get 15+ days off, other months it's 12 days off. I don't commute so life is easy. From what I know, ORD is by far the best base for commuters. On a side note, Gojet is not the nightmare others make it out to be. 8 months in you can hold a really good line with almost any days off you request. Captain upgrades are quick and the pilot group is super tight knit. Good luck with your choice.