Visit the airline's website to find the most accurate and up-to-date information about a flight. Look for a section entitled "Flight Status" to search for flights by city pair or flight number.
Many airlines also offer apps that you can install on your phone or tablet to locate flight information. Some apps enable you to save specific flights for quick reference and set up notifications that push updates directly to your phone or email.
Once you locate a specific flight, the airline's website or app provides a wealth of details. Before the flight, you can check for delays and see the estimated departure time. Many airlines provide seat maps, upgrade and standby lists, gate information and boarding totals. You can also find details about the aircraft that operates the route, including the number of passengers it can carry and whether or not it offers snacks or Wi-Fi.
When you want information about a flight that is already in progress, most websites and apps provide information about the takeoff time and the expected time of touch-down. Look also for gate information at the destination airport. United Airlines also enables users to track a flight; when you click the "Where is this aircraft?" link, the system displays a real-time flight map.