In message , at 21:20:36 on Tue, 3 Feb
2009, Richard J. remarked:
The flight time will be affected by the strength and direction of winds
at the height that the aircraft flies, so it will vary from day to day.

The departure time (which is more about ground based logistics) will
vary more on a flight of that length.

Because of that, I don't think the times in the last few days will be
of much use. The BAA flight arrivals page on www.heathrowairport.com
will give you a fairly accurate arrival time soon after the flight
leaves Tel Aviv.

Various such sites will have estimates based on the flight time the
captain files when he takes off, which will have been calculated based
on that day's actual weather.
--
Roland Perry