Travelling without a Mahram

Q: Please advise on the following situation: 

My wife has one sister, who is younger than her and unmarried. Their mother passed away last year. Her sister is working and currently stays alone. 

My wife has asked if her sister can join us on holiday as she has no one to travel with. 

Furthermore, my wife has proposed that if I do not agree to her sister joining us on holiday, she will have no option but to travel alone with her sister and our children to either Durban or Cape Town.

 My wife does not feel comfortable leaving her sister alone at home, nor does she feel comfortable with her sister travelling alone. 

Please advise if any of these options put forward by my wife are permissible. Are there any other options that can be considered?

Q: There is a hadith about women travelling, Abu Hurairah (radhiyallahu anhu) reported: The Messenger of Allah (sallallahu alaihi wasallam) said, 

"It is not permissible for a woman who believes in Allah and the last day to make a journey of one day and night unless she is accompanied by a mahram (husband or male relative whom she is prohibited to marry)." (Al Bukhari and Muslim) 

According to the hadith, if a woman travels alone will her prayers not be accepted?

Q: Can a woman travel from a mahram to a mahram via a flight less than 3 hours?

Q: In todays times, women travel all over without a mahram. If I organise a lift for my sister, will I be sinful in doing so? She says that she always travels on her own so it is not a sin on me. Please advice.

Q: I want to ask about travelling alone. My sister lives in Australia and she wants to visit us in India. She cannot come with her husband or son because of their work and school. My other sister is also coming from Saudi with her children so we can reunite as my mother is not well

My question is, is it permissible for her to travel alone as she is confused?

Q: Is it permissable to travel with your mother's mahram whilst your mother is present? I don't have a mahram who can take me to go and see my sick nani. So is it permissable if I travel with my mother and my brother in law and his wife (which is my sister)? Pardah will be observed as well.

Q: I, my younger sister, mother, my elder sister and her husband have to travel from India to Saudi Arabia.

Can I and my sister travel with my elder sister's husband as our mahram?

Q: One of my cousins and her friends are planning to go on a holiday, which requires 1.5 hours to 3 hours flight journey and staying there for 7 days in a friend's known family guest house.

My question is, can they travel without a mahram? They are taking the fact that a woman can travel from one safe place to another.

Q: My wife and daughter (25 years old) want to go to visit Dubai from the UK. Is it permissible for them to travel together without a male.

Q: I am a woman who lives in Canada and I need to get my passport renewed in order to go to Turkey where the rest of my family has settled. I am not financially independent so I cannot live here on my own. However the place where I need to go to get my passport renewed is over 100 km from where I live. I have no mahrams here and my father who is in Turkey is not religious and would not come to Canada just to drive me 100 km to get my passport. I can drive myself but I know that I cannot go that far without a mahram normally. In this situation can I just drive myself? If not what would you advise I do?