Bird Breeding Topics

I have been looking into different ways of organising private travel and came across the concept of empty legs. What caught my attention is that these flights are connected to an aircraft's existing schedule, so they may not follow the routes or departure times that someone would normally choose when planning a trip from scratch. I travel internationally several times a year, and sometimes my dates are flexible by a day or two. That made me wonder whether this kind of option could be worth researching. Is there a straightforward way to keep track of available routes without constantly searching from scratch?