The FAA Website provides a nice quick map check of general flight delays around the USA. The FAA USA flight delay map is here. For detailed information it is generally best to consult your airline rather than this map or even Airport information which seems to sometimes lag the Airline website reports by many minutes or even hours. Also, this map is only about general delays that affect the airports – there will also be specific airline/flight related delays that do not show up here.
Contacting your airline for delay information is especially important if you are travelling on international flights to or from the USA when the delays can be longer and of more inconvenience to you.
A neat trick to find quick flight information is to use Google’s search box shortcut. Typing in Airline Name + Flight Number at Google will give you flight schedule / arrival / delay information.
You can even abbreviate the airline to it’s two letter code as in “UA 22″ for United Airlines flight 22.