All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
This woman should not travel without a Mahram, because this is forbidden in the Shariah. Ibn ‘Abbaas, may Allah be pleased with him, narrated that the Prophet said, “A woman must not travel except with a Mahram.” [Al-Bukhaari and Muslim]
If she does not find a Mahram to accompany her, it is more appropriate for her to find a means to renew her passport without traveling, such as sending it by mail, for example. If this is not possible and she needs to travel without a Mahram, then there is no harm on her to travel provided that she takes precautions to be safe during her travel. Some scholars gave concession for a woman to travel with safe company in every permissible travel.
The Hanbali scholar Ibn Muflih said in Al-Furoo’:
“Our Shaykh said, ‘Every woman is permitted to make Hajj without a Mahram if she is safe (in her travel).’ He also said, ‘This applies to every travel of obedience.’ This is what he said. Al-Karaabeesi quoted this from Ash-Shaafi’i in regard to an optional Hajj. Some of his companions said the same thing about the optional Hajj and about every travel that is not obligatory, such as a travel for visiting or for trade. The Maaliki scholar Al-Baaji also said this in regard to an old woman who is not desired for sexual intercourse. Abul-Khattaab mentioned the narration by Al-Marwathi and then said, ‘The apparent meaning is that she is permitted to travel without a Mahram.’ This is what our shaykh said in regard to an old woman who attends the congregational prayer.”
The fact that she migrated from that country before in order to preserve her religion and honor does not prevent her from traveling to that country for her need if she feels secure, provided that she does not stay there, except if the reason for which she had migrated from her country no longer exists, as has been stated by some scholars.
There is no harm in her visiting her family.
Allah knows best.