<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by terenz:
Door close time, ready for departure seems to be it. The rest is out of the airline's hand.</font>
Except, of course, when the crew close the door/push back in full knowledge of any delays, making pax sweat in their seats for ever, so that that they can get paid for the waiting time...