It was the Prophet salla Allahu alaihi wa sallam who answered a similar question by saying that it is not permissible for a woman who believes in Allah and in the day of judgment to travel without a mahram.

Therefore, she must not come alone.

I need to clear a doubt.I am working in saudi arabia.My mother is staying in India.Insha Allah this coming year we want to perform hajj.Mothers age is 55 years.Can she alone come from India without mahram.