Search function to know game session length?

Hello everyone! I'm super new to Roll20 but have been playing D&D for a little over a year now. I was looking at some of the games on here and I see where I can search by start time but is there a way to search for session duration or is that something I have to ask the individual games I'm interested in?  I have limited time windows on the days I can play and don't want to apply just to find out I won't be able to commit to the full time for the session. Thanks for any help given!

There isn't a way to search for that, nor a way to set it on a particular game.  That is a good idea though, and might be useful for exactly the situation you're mentioning.

In my experience a typical D&D session lasts about 3 hours.