Modernity brings convenience to our lives. Various long-distance means of transportation are easily found anywhere. Inter-state bus, continental train, ship, aircraft, or taxi. In addition, these vehicles also offer comfortability in form of food, internet, movies, or magazines. So we can enjoy our long journey without boring. We should be grateful to God for giving us these conveniences.
Alhamdulillah, these conveniences also help any women on travel. Nowadays it is not strange for a woman to travel alone, but i think it is nice for you to consider what Islam said about traveling woman. The basis of this idea can be found in the hadith narrated by Abu Said al-Khudri:
لَا يَحِلُّ لِامْرَعَةٍ تُوْمِنُ بِا اللهِ وَلْيَوْمِ الَاَخِرِ اَنْ تُسَافِرُ سَفَرًا يَكُوْنُ شَلَاشَةَ اَيَّامٍ فَصَاعِدًا اِلَّا وَمَعَهَا اَبُوهَا اَوِبْنُهَا اَوْ زَوْجُهَا اَوْاَخُوْهَا اَوْ ذُوْ مَحْرَمٍ مِنِهَا
“It is not lawful for a woman who believes in Allah and the judgement day to travel for three more days, but she must be accompanied by her father, or her child, or her husband, or her brother, or her mahram (men who not lawful to marry.)”
In the other hadith (narrated by Abdullah bin Umar) the law are repeated:
لا تسافر المراة شلاشةا ايام الا مع ذي محرم
“No woman should travel for three days, except with a mahram.”
The importance of mahram to a woman also can be found from a hadith which reported by Abdullah ibn Abbas. The Prophet said:
ل يخلون رجل بامراة الا ومعها ذو محرم و لا تسافر المرعة الا مع ذي محرم فقام رجل فقال: ان امراتي خرجت حاجة و اني اكتتبت في غزوة كذا و كذا قل: انطلق فحج مع امراتك
“Never let a man be alone with a woman unless she is accompanied by his mahram. Nor should a woman travel except with a mahram. (Hearing that) arose a man and said: “Verily, my wife has come out to perform the pilgrimage, while I have been required to follow a war.” He said: “Go and perform the Hajj with your wife.”
The hadith narated by Abu Said Al-Khudri explained what mahrom are? They are a woman’s biological father, her adult son, her male sibling (same mother, father of one mother, or different mother of a father), and the most important is Her husband when she is married. In addition, her uncle (either brother or sister of the father or mother), adult nephew, grandfather, and people from outside family who once breastfed by our mother (minimum Three times) to satiety as are counted as mahram. It is described in the hadith
يحرم من الرضاع ما يحرم من النسب
“Forbidden marriage due to breastfed as due to kinship.”
The men who are not counted as mahram:
1. Adult cousin. Cousins can be a husband or wife except he or she once breastfed by our mother at least three times.
2. Brother or sister in law.
3. Male best friend.
 Shahih. HR. Muslim (no. 3257) in chapter “Haji”. Panduan Manasik Haji & Umrah, Ustadz. Yazid bin Abdul Qadir Jawas, Jakarta: Pustaka Imam Syafii, 2010, page. 19.
Shahih. HR. Al-Bukhari (no. 1086). Ibid, page. 19.
Shahih. HR. Al-Bukhari (no. 3006) and Muslim (no. 3259)