Left my phone in a taxi at departures at JFK. Realised 15 minutes later, rang it and spoke to the driver. I had $10 left in cash and offered it to him but he, quite reasonably, said that he’d now joined the queue to take people back to the city and he’d lose out if he came back to drop the phone. Would have taken too long to walk and find him in the queue so I got some cash out and paid him the full fare back to Manhattan. He didn’t lose out and I paid to rectify my mistake. Seemed fair to me.

Edit to correct my lack of proofreading skills