The ruling on a woman traveling by plane without a mahram

Question:
He says: Honorable Shaykh, may Allah grant you success. A woman wants to travel to visit her sick father, but her husband is unable to travel with her due to his work commitments, and she has no other mahram. Is it permissible for her to travel by plane without a mahram to visit her father, whose illness has become severe?

Answer:
The Prophet (peace and blessings be upon him) Does she not travel? And it is not obligatory for her to return to her father; she is excused. And now, praise be to Allah, with communications, the telephone, and the mobile phone, it is as if she is with him; she asks him, talks to him, and convinces him that she has no one to take care of her, or that she would come, and the like of that. Yes. And Allah the Exalted knows best, and may Allah send prayers and peace upon our Prophet Muhammad and upon his family and all his Companions.