I missed an unprotected international connection out of New York due to a weather 6-hour delay.

Another passenger saw me crying on the phone with my father when I had to ask him to help me buy a new ticket back home. He (and another elderly passenger) cheered me up and offered me to stay with him until the next flight out the next afternoon.

Took me (male, 21) to his room, took care of me until my flight and told me to pay it forward.

It was one of my first intentional trips and it had all gone to shit even before this event. I flew back home with like 30 euros on my account.