Translation of Laufzeit

In England, a man would still open a door to a woman, but in other countries this habbit is less common. In a way, habits that existed hundred years ago slowly loose their meaning and importance.
Let me continue to tell you about my adventures. So, as I have told you in my last writing I returned to the airport and scheduled a new date for my flight. This time I left myself five more days.
She could not join me since her flight to Israel was supposed to leave in less than 48 hours. I helped her carrying the bag to a hostel in Cancun and we went together to the airport. I postponed my flight again.