Nafi' narrates from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "No woman should travel (a journey of) three days without a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5405
(a) Abu Salih narrates from Abu Sa'id (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A woman may not travel a journey of three days or more without her father, her son, her brother, her husband or a mahram."
(b) In the narration of Abu Nu'aym: (She may travel) with her husband, her father, her brother or a mahram.
(c) In the narration of al-A'mash: a journey that is three days or more.
(d) Qaza'ah bin Yahya narrates from Abu Sa'id (may Allah be pleased with him): more than three days, and in one narration: two days. Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him): a day and a night; and some narrations mention a day, some a night, and some a barid.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5406
Qaza'ah narrates from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) forbade "a woman to travel for more than three days without her mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5407
Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) says that he heard the Messenger of Allah (peace and blessings be upon him) say: "No woman should travel a journey of two days and two nights without her husband or a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5408
Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him): "It is not lawful for a woman who believes in Allah and the Last Day to travel a journey of a day and a night without a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5409
It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "It is not lawful for a woman who believes in Allah and the Last Day to travel a journey of one day without a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5410
Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "It is not lawful for a Muslim woman to travel a journey of one night without a mahram."
In the narrations of Sayyiduna Abu Hurayrah (may Allah be pleased with him), wherever the word 'a day' (yawman) occurs, its night is also meant, and wherever the word 'a night' (laylatan) occurs, its day is also meant.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5411
Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Prophet (peace and blessings be upon him) said: "No woman should travel (the distance of) a barid without her mahram."
Note: The narrations that mention one, two or three days are sahih (authentic).
The Prophet (peace and blessings be upon him) was asked whether a woman may travel for three days without a mahram, and he (peace and blessings be upon him) said: "No." He (peace and blessings be upon him) was asked about a journey of two days, and he (peace and blessings be upon him) said: "No." And he was asked about one day, and he (peace and blessings be upon him) said: "No." Each (narrator) reported what he remembered, and these numbers do not set any limit for a journey.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5412
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he (peace and blessings be upon him) said: "No man should be alone with a woman, and no woman should travel without a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5413