Fearing my miles expiring I did a quick calculation for a 1 way from PHL to Cun (I have a ticket booked w/ Southwest already)
Sat/Sun is 25,000 PP Mon is 15,000 PP based on the cash cost of the tickets the points are worth 0.005 ea
That's minus the $50 +/- fees I'll pay either way, I'd also have to add bag fees to the total, which I'm not paying on SW