I have found that Copa has a lot of cheap flights if playing with departure/arrival cities. Into Panama City, is always expensive (that is where I leave from/need to get to). I have found just by searching that North American city to airports in Brazil/Bolivia, back to PTY and the back to North American city are around the same price as North American city to Pty round trip. Making it a multi city doubles the miles.

Is there a way to put a open ended search in or is it just trying on the website.