CA base seniority
It's not quite that easy once you upgrade. I've got a table of my own going to keep an eye on the trends for CA bases.
Least senior to most senior CA bases and the span of the bottom 10 DOHs...
EWR: 12/15 to 9/15
LGA: 12/15 to 6/15
PIT: 7/15 to 6/14
DCA: 4/15 to 10/14
CMH: 3/15 to 9/14
MIA: 3/15 to 3/13
PHL: 12/14 to 9/13
IND: 10/14 to 1/14
MCI: 5/14 to 3/11
IAH: 11/13 to 3/07
ORD: 11/13 to 6/07