A couple of years ago, but worthy of mention is Virgin Airline staff out in Orlando.
Went over for a "holiday of a lifetime" but had to cut short & fly home immediately because of death of a parent. Called Virgin and got flights rearranged - we have allergies in the family so not as easy and they promised to "do what they could" and we were split over two flights.
Arrived at Orlando Airport and joined queue only to have the supervisor come over and ask if we were the family travelling etc. Took us away to one side and quietly and efficiently had everything processed on our behalf including getting us all moved onto one flight, all meals sorted out etc Kindness personified with just the right words for my wife.
Same on board the aircraft despite a busy flight.
It was the freely given time despite everything else going on that was the "extra mile" and I remain grateful to this day.