In a day and age where everything is available online, all-in-one sites which give you realtime information on airports and flights are no exception. While (I believe) all individual airlines offer flight information in realtime, a valuable web site which offers information from all airlines and major airports in a single place is Flight Stats.

Using Flight Stats you can not only track departure and arrival time of flights, but also see, in realtime, the flight path and where the plane is on a map overlay. Additionally, you can check the overall “delay level” at major airports to help get an idea of how this may effect your travel plans.

Of course, this site does come with ’sign up for our [fill in the blank] service’ notices scattered about the site, but this is to be expected. Overall, for people travelling (or waiting to pick someone up from the airport) this site could prove to be a handy resource.