If you have a specific flight in mind, with the flight number, you can use FlightAware, which has pretty good global coverage for most airlines. The duration is shown on the right: actual duration for completed flights and scheduled duration for upcoming/in progress ones.
Hipmunk gives you a nice graphical representation of flights and their duration.
Credit:stackoverflow.com‘
4 Mar, 2024
5 Mar, 2024
4 Mar, 2024