I flew with Austrian Airlines between two high-security airports … without trace

My return flight was cancelled because ‘I hadn’t showed up’ for the departure, but I’d been through passport control on the way outIn March I flew on an Austrian Airlines flight from Vienna to Brussels. I checked in online and went through passport control and all the security checks before boarding. Two days later I tried to check in online for my return flight, but couldn’t. At the airport I was told my reservation had been cancelled as I had missed the outbound f