I've gotten teary-eyed at some of the sad movies on planes. I've also cried (quietly) when flying to my mom & dad's funerals.

Only time I cried at the gate was years & years ago. Had to go to Houston from O'Hare for a critical meeting for my company. Was on the last UA flight. Was tired & sick (shouldn't have been flying, but it was a critical mtg & I had to be there). Two gate doors literally right next to each other. Go down what I think is the correct one. Get on plane, settle into seat, & hear them announce that the plane is going to (can't remember where, but it wasn't Houston). Get off the plane asap & go to gate agent. Can I get on the Houston flight? Nope; it's gone from the gate. It's late, I'm tired, I have to be in Houston for this meeting, and I lost it (not hysterics but started crying due to stress/tired/sick). They realized there was a flight leaving shortly on AA & UA switched me to that. Of course nowadays, they'd say tough patootie but back then there was still cust service. Only time I've really cried at the airport. Luckily it was late & not many to see me.

Cheers.