I have only been using flightaware.com for a few months but love it, it is an awesome sight ! One flaw though for those who us it in the US who want to check arrivals/departures for a particliar US airport it seems to work much better for primarily domestic airports than airports with lots of International flights. It's works great for my home airport of LGA
, but for JFK
lots of the stuff from say Europe seems to have a lot of inaccrices. Today I was watching MIA
and certain flights would go from being do in about 90 mins to having arrived 10 mins ago in just a few minutes time ! There seemed to be lots of International flights with info for one of two days prior mixed in with todays arrivals/departures. A small nusense, if you have never tried give it a try, you can do plenty with out registering and even more after a very brief and free registration !