59 for me.
ATL, BDL, BHM, BOS, BUF, CAE, CLE, CLT, CMH, COS, CVG, DCA, DEN (2), DET, DFW, DTW, EWR, FLL, GSO, HNL, HOU, IAD, IAH, IND, ITO, JFK, KOA, LAS, LAX, LGA, LGB, LIH, MCO, MHT, MIA, MSP, MSY, OGG, ONT, ORD, ORF, PDX, PHL, PHX, PIT, PWM, RDU, ROC, RST, SAN, SAT, SEA, SFO, SJC, SJU, SLC, SNA, STL
One of my little airport "claims to fame" was that I flew into Stapleton and out of DIA while on a business trip
Plus 20 Intl...
AUA, BKK, CCS, CUN, EZE, FRA, GRU, HKG (2), JHB, KIX, LHR, NRT, SIN, SYD, YEG, YUL, YVR, YWG, YYZ