Is companionship of 'mahram' (husband, father,son etc) is as necessary for women to go to Hajj or Umra as it was in the past. Now the travel . has become much more fast, secure and comfortable, and women alone can easy make this travel.
Yes! Just like in the past, in the present times as well, a woman must have a mahram (unmarriageable male relative) as her companion during her travel for Hajj, Umra, or for whatever reason she may undertake a journey that amounts to 78km or more (شرعی مسافت).