MAH4546 is 100% right. palm beach county has plenty of residents that look for low fares, and also has a tremendous amount of those that can easily pay for a first class or business fare.
and john, before song or jetblue came along, i flew EVERY OTHER NIGHT on the DL
763 flight to LGA
. first class was consistently sold out every time and upgrades were virtually impossible to come by, even as a platinum medallion flyer, and vice versa on the flight back to PBI
, which was the 4 o'clock 763. of course PBI
-NYC flights on DL
aren't going to be high yield! they're being flown by a low fare airline! but check on the seasonal AA
flights to LGA
that start in a couple weeks and you will find that first class is always full and it's full with full-fare paying passengers.