This seems to result in every plane leaving either empty or delayed.<p>Realistically it would have to be done with an interval of boarding. Whether this interval is known to the passengers or not I don&#x27;t think matter.<p>So boarding is between 10:00 and 10:30. The first passenger to arrive after boarding starts will be the first to board, since they would be at the end of the line at that time. And so would the next one, and so on.