I flew Druk to Paro and left my laptop on my seat (it looked like one of the Druk pillows in its cover). The Paro station manager dropped it off that night at my hotel, after the hotel manager called the airport.
Leaving (to KTM) I left a bag with souvenirs and a digital camera at Paro airport. The KTM station manager said they'd put it on the flight the next day and I could collect at the KTM sales office. Which they did.
Pretty Druk good.
p.s. I hardly ever lose anything, so I blame a Bhutanese spell.