FAA - Flight status tools

At the FAA Flight Status page you can get a lot of good information, some in real-time, about flight status, Airport delays, and more. This is generally not a good substitute for going directly to Airport websites and Airline websites for information about specific Airports and flights, but it's a good tool for a quick overview of flight information. If you need information about a specific flight you'll generally want to go to the website of the airline. This is more often than not the best information source although some airlines don't update the sites often enough, leading to some confusion.