Is it permissible for a woman to travel by plane without a mahram if it is difficult for her mahram to go out with her?

Question:
Honorable Shaykh, may Allah grant you success. A questioner asks: What is the ruling on a woman traveling by plane without a mahram if her guardian is unable to go with her?

Answer:
This is not permissible, and it is not lawful. The Messenger (peace and blessings be upon him) said: Suppose she went by plane, and the plane changed its route and went to another country; who would receive her? Suppose she fell ill on the plane; who would take care of her? Who would carry her or transport her? This is not permissible. Yes.