Taking out whatever happened today, which if it was to do with the new caterers was hopefully a once-off glitch, I have looked over the ex-LGW flights for March, April and May of this year. During that time there were no ash clouds or extreme weather conditions as far as I recall to thwart travel plans so therefore we are talking about reasonably normal travel patterns. The information is a direct feed from Virgin Atlantic and thanks to the genius that is Pete, departures and arrivals are colour-coded - green for a departure/arrival which is either early or within 15 minutes of scheduled departure time; amber for a departure/arrival between 15-45 minutes late and red for any departure/arrival after that.
So what did I find? Well for starters the pages were awash with green with a few ambers here and there and about 4-5 red departures and arrivals per month. What was interesting was that a few red departures had green arrivals and there was one green departure with a red arrival (which was so far from the scheduled arrival time as to suggest a diversion) Most amber departures had green arrivals and a couple of green departures had amber arrivals. In other words, a fairly normal pattern of an airline which is probably replicated throughout every airline in the world
jodash wrote:So are you saying if the flight leaves the gate on time but stands on the runway for a hour it is not a delayed flight
You may be surprised to know that this is quite common in the US where flights push back on time and then go into what's known as the "penalty box" for whatever reason. On the DOT's statistics this is classified as an on-time flight.
Airlines do pad their schedules to accommodate airfield operations. Just think about the VS46 which can spend over an hour waiting for take-off in JFK and yet arrives on time in LHR. Even the best laid plans can be over-ridden by airfield operations. Her Majesty the Queen was scheduled to leave Cork after her state visit last year at a time between banks of flights arriving and departing to ensure a smooth departure. The airport was deserted apart from the Aer Lingus flight scheduled to leave some 30 minutes later. So what happened? Her plane taxied and then had to wait for a Ryanair flight from Liverpool to land. O the ignominy!

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