Ok, I'm bored:

LAN,FNT,GRR,DTW,TOL,CLE,PHL,LGA,EWR,BOS,MHT,DCA,IA D,BWI,CHS,SAV,ATL,JAX,MCO,MIA,TPA,GPT,MSY,MEM,CVG, ORD,MDW,MKE,MSP,FAR,OMA,LIT,DFW,SAT,DFW,ABQ,PHX,DE N,BZN,SEA,PDX,SFO,LAX,ONT,PSP,SAN,SMF,RNO,LAS,AMS, LGW,NAS,CUN,YYZ,YEG,YVR,ABE. All on NW or NW Airlink, I think that's 57.