IND-ATL-JAX I usually fly this early Mon morning, sometimes Tues. I have always gotten upgrade on the first leg to Atlanta. From Atlanta to Jacksonville is about 50%.
JAX-BWI-IND This is usually the late afternoon flight, with a long layover in BWI. Again, I get upgraded almost all the time on the first leg, and maybe 2/3 time on the second.
One thing that bugs me, and this has happened 3 times in the past 4 weeks. I am in the connecting city, go up to agent at 40min mark and am told she is still processing upgrades, please wait. I step to side, sometimes with as many as 3 other waiting Elites. She then boards the entire plane, every single passenger, then turns those of us waiting for upgrade. Now in each case I have gotten into BC. But it is kinda maddening to have to wait like that.