While I think flights to FLL and MIA are definitely a good add- I would argue that most people in the PDX catchment area would rather vacation in Hawaii than Florida. I personally like Florida, but it's definitely not considered as nice a destination as Hawaii by many people around here (aside from the Theme Parks)
I agree that PDX to S. Florida is a matter of when & not if. You would not need to argue your point, it's quite factual that Northwesterners vacation in Hawaii more often than Florida, despite equal travel times. Disney excluded, it's not even a horse race.
I & every one I know here, do agree that Hawaii is a nicer place to hit the tropics for two weeks, my folks own a condo there, so do most of their friends & the large groups we'd go with the first two weeks of August, every year from 1979 onwards feel the same way today.
I also know 3 different folks that live here & have condos in Palm Beach or Ft Lauderdale, they go back & forth twice a year, but Hawaii is the king of vacations from Oregon still.
707 717 720 727-1/2 737-1/2/3/4/5/6/7/8/9 747-1/2/3/4 757-2/3 767-2/3/4 777-2/3 DC8 DC9 MD80/2/7/8 D10-1/3/4 M11 L10-1/2/5 A300/310/320
AA AC AQ AS BA BD BN CO CS DL EA EZ HA HG HP KL KN MP MW NK NW OZ PA PS QX RC RH RW SA TG TW UA US VS WA WC WN WP YS 8M