If you meet passengers on an airplane, your friends, relatives, or a client, then most likely you will need to keep track of flight status information.
Earlier it was rather difficult to find out such information, from public sources there were only displays on airport sites that give the least information about the flight.
Now there are specialized services that even on a free basis allow you to monitor the flight you need – see the time of departure and landing, flight delays and many other useful information.
The free versions have all the necessary information, but if you want more, you can register and purchase premium access.