PIA
Could it be the type of aircraft?
BHX is an all 777 operation and I would have said from local knowledge
that PIA's time keeping is very good for a long-haul operation.
However flightstats did not quite back up my theory for the period
15/2/10-15/04/10 as it only showed it went on time 53% of the time
with an average delay of 32 minutes.
However this could be skewed by snow closures but I can't remember.
I stand by my initial statement that PIA are generally very good.
Pete