I can only guess that PHX is going junior because we're increasing flights to/from DEN up so heavily. SWA stripped MCO and BWI when they stood up LAS as a crew base. LAS went more senior for Captains than most expected. A lot of senior FOs are leaving LAS realizing their upgrade won't be as quick there as they had anticipated. I saw my seniority from BWI go from 40 from the bottom two months ago, to #2 from the bottom this month. I expect to be displaced in March when they cut 4 FOs in March.