Originally Posted by
LaserSailor
Because crews fly all day and timeout on total duty hours allowed, including time added for diversion airport. I thought once they push legal they can stomach a delay, but obvisoulsy there is a limit on that at some point. This is covered in Ask a Pilot on FT somewhere...maybe UA?
I've seen FAs on delayed flights have the option to work the flight or not due to duty hour limitations. There's apparently one threshold where they can opt out and a second higher duty hour threshold after which they cannot work a flight. I've also seen FAs be swapped to another flight when they're apparently obligated to work or legal to work only a shorter flight.
I don't know whether pilots have similar rules.