The flight just started yesterday so I'm not surprised they wanna fill er up now.
I just REALLY hope this flight lines up price-wise later on. Flying YVR-SFO-PTY-MDE is much more appealing than YVR-IAH-BOG-MDE or YVR-YYZ-BOG-MDE. But YVR-LAX-PTY-MDE has never really shown up as an option within a reasonable price range so I'm not optimistic.
Cuz SFO-PTY does nothing for me by itself. Even YVR-SFO-PTY I'd love, cuz I've never had a chance to go to Panama outside the airport. But usually once you add that positioning flight it becomes too pricey.