I was trying to go from LAX to Cancun the other day on Alaska Air #240. The flight originates in Seattles, stops and unloads in Los Angeles, then reloads and heads on to Cancun. There was one seat left and the gate agent had to give it to a guest pass pax who originated in Seattle. I think its a stange policy but it evidently came about to protect non-rev passengers traveling on flights through Alaska. Also, under this policy, a non-rev passenger from another airline would still get priority over an Alaska employee or dependent trying to get on in the stop-over city. (Another F/A told me how she tried to get her family of 4 from LAX to Cancun last years but was bumped by a NW family of five who originated in Seattle.) Does any other airline have a similar policy?