Every time I fly (Delta), the captain comes on and as well as the general welcome stuff, weather at destination etc., he says something like "and the flight time will be xx hours and yy minutes".

I've often wondered how accurate that is, for surely "10 hours and 58 minutes" can't be right, so why not say "around 11 hours".??

Anyway, I just came back from NRT to LAX, and the captain announced "flight time 9 hours 12 minutes". So, I set that time in my timer app, and on wheels up hit Start.

I stopped it when we touched down.

9 hours, 12 minutes, 20 seconds later.

I was impressed.