JFK or MIA would take about a year to a year and a half depending on exactly where you fell with the 767 seat locks expiring. It's a crap shoot now a days because you may end up on the 767 for 3 years before being able to hold the 747. Then you'd probably be able to hold everything except for PAE and IAH.

I've been here 3.25 years and still can't hold IAH yet. After 3.25 years I'd be in the bottom 20% at MIA and the bottom 33% at JFK. I'm top half in HSV and close to the top 50% in CVG. For the West Coast guys I'd be bottom 20% in LAX, the last guy at PAE, and top 20% in ANC.