I spent a lot of time in the 80s between the ages of 8 and 11 doing grueling last-minute multi-segment TATL round trips with one or both of my parents for family funerals, final goodbyes of terminally ill relatives, etc. At the time, I was prone to horrible airsickness and pretty much dreaded/hated the experience of flying because of it. I don't explicitly remember crying in any of the airports, but it wouldn't surprise me if I did. I do remember my parents crying in the airports; we found out my grandfather had died from a payphone @ JFK after one of the ocean crossings.

I think I see more emotional people (sad and happy) at airports than I see at any other place I might frequent in life except hospitals.