Lets say my flight or start for the travel would be in the late morning in Ramadan and I'm willing to break my fast for the duration of my trip as it would be a kind of hardship.

What are the views of the different sects and madhabs on when or from what moment on I'm allowed to break my fast (by eating etc.).

I've read an essay of al-Albani discussing whether one should:

 1. start the day fasting until one really starts his trip  
or 
 2. one can eat even before leaving home (at day time in Ramadan). 

But it doesn't address the views of madhhabs and seems to be based on some seemingly contradictory narrations.