2017 + 2018 retirements (early 2017 tally)(base size nearest 50) -

CLT - 210. Base size -1550. 13.5%
PHL - 159. Base size - 1300. 12.2%

Assuming 85% of retirements are Captains 24% of both the CLT and PHL CA’s are retiring in 2017-2028.

For comparison -

DFW - 81/2500. 3.2%. 6.2% of CA’s
LAX - 56/1350. 4.1%. 8.1%
MIA - 75/2100. 3.6%. 6.8%

Retirements don’t necessarily mean movement if the flying shifts elsewhere (comment for people new to the industry).