Originally Posted by
okazon69
As recently as 2006 I was allowed into the flight deck on board an OS flight from VIE to YUL, and this over Canada (from about Tadoussac to Quebec City). The captain said it was entirely at his discretion. No paranoid rules to follow for non-North American carriers.
OS seems to be one of the better ones for that. I've also seen it done on OS flights, including ones from the US.