Since the launch of iOS 9 and macOS 10.11, Apple has made it possible, via its own operating system (natively), to view information related to flights. Because the developer Josh Parnham decided to take this resource and take it to the macOS Notification Center, making things easier for those who want to check such information. Thus, the TodayFlights.
When you download the free app, you open it for the first time, go to the Notification Center, click on the “Edit” button and add the widget TodayFlights. Then just click on the “i” so that the widget turn around and you can put the flight information on yourself.
In the field Airline Code you enter the airline code (in my example, JJ, from LATAM); j no Route Number you enter the flight number itself (in my case, 3901). I did some tests here with national airlines / flights and in only one of Azul he was unable to get the information.
The available information is: flight status, departure and destination airport, terminals and sizes involved, in addition to departure and arrival times.
So, here's the tip: if you want to have access to simple information about a particular flight (be it from a family member or friend who is traveling, for example), TodayFlights is worth having in the Notification Center. 😉