The ruling on a woman traveling without a mahram and the distance for which a mahram is required?

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the ruling on a woman traveling without a mahram? And what is the distance for which she needs a mahram? And is this distance calculated by time?

Answer:
And her traveling without a mahram is forbidden. His saying (peace and blessings be upon him): "It is not permissible." What does "it is not permissible" mean? It means it is forbidden. It is not permissible for a woman to travel except with a mahram. A mahram is required for the journey of shortening (qasr). The journey in which one shortens the prayer. As for the short journey in which one does not shorten the prayer, this does not require a mahram.
But she has to be careful, she has to be careful of the people of open sinfulness and be cautious, and be with a group of women or a group of people or passengers in the car. This is for journeys less than the distance for shortening. For the journey [of shortening], a mahram is necessary, even if she is in a car, plane, or boat. A mahram is necessary. Yes.