Long time lurker on this site but never really posted. I had two fun celebrity sightings in my many years of US Air travel.
First, Larry Brown (PHL-ORD) while he was still coaching the 76ers. We chatted while in line to check in at the airport and then after he landed where he was waiting Mo' Cheeks' (assist coach at the time) father to pick him up in Chicago.
Second, Jeremy Roenick (PHL-LAX) while he was still with the Flyers. I was sitting right behind him and his wife who were in 1A/1C. It was very entertaining. First I was hearing his cell phone convo to someone complaining how his new skates were making him slow. And then had to listen to his wife talk about lots of other people and how much money they had and spent on beach houses, etc.