This is a comparison of Quarter 4 (October, November, December) 2017 vs 2018 passengers stats of where people fly to/from SAT. These numbers are PDEW (Passengers Daily Each Way) to see which routes are growing/shrinking. Divide the number by 2, as its counts passengers flying DFW-SAT and SAT-DFW each day. These numbers are passengers final destinations, do not include connections ie if someone flies SAT-DFW-DCA, it does not count towards the passenger count of SAT-DFW, only SAT-DCA. To save time, I only compared airports with at least 100 PDEW to/from SAT.