Upgrading of DL employee non-revs from LHR-JFK
I recently travelled from LHR-JFK and was seated in Comfort +, and therefore not expecting an upgrade as the flight was only about 50% full. Prior to boarding, a contact of mine at LHR informed me that 5 DL employees who were non-revs had been upgraded to Delta One. Is this normal practice that non-revs would be offered upgrades ahead of a revenue paying DM? I certainly didn't mind where I was sitting, but was certainly surprised to hear that this happened.