Sometimes it’s good to have an “objective” (nonairline) tool to help you track your travel.
FlightAware: FlightAware just asks for as much information as you have (Flight number not at the top of your mind? No worries!) and delivers status information for flights matching those criteria. Statuses are easy to understand and often more timely than the airlines (“left gate” versus “took off”).
FlightView: Tracking someone else’s flight to know when it’s time to leave for the airport? FlightView is your tool. It shows flight and weather information on a map to enable you to get in front of delays and handle the fallout.
FlightStats: FlightStats gives you the important information using large-font text and color. Then, below the big bold status is all the other information you might need, including how to set up an alert.