Viz. Southwest: I heard something interesting today from a reasonably reliable source (can't disclose, so if that makes a difference, I accept that). Apparently, one big problem they are having is that they do not have enough flight attendants for all of their flights, and for that reason they are having to cancel flights. My understanding is that federal law requires one flight attendant per every 50 passengers on a plane, and they can't get enough staff to staff all the flights now.