Not quite as impressive a list for 2004 as Norm, but brutal nonetheless:

AAR, AUS, BOS, CLT, DCA, DFW, DTW, FLL, FLR, FRA, HNL, IAD, JFK, LAS, LHR, MCO, MIA, MSY, ORD, PVD, RDU, SEA, SFO, SJC, YVR

This year, I spent way too much time on planes and in airports! I've already got a full plate for the first 4 months of 2005:

BOS, PVD, RDU, LAS, MSY, PHX, YVR

Indispensable investments in 2004: this and this. They helped preserve my sanity on more than one occasion.