Response: It is impermissible for a woman to travel for the Hajj or other than the Hajj except with a mahram, whether she is a maid or not, for that which the Prophet said (sal-Allaahu `alayhe wa sallam) has said:
((It is not permissible for a woman who believes in Allaah and the Last Day to travel the distance of two days, except with a mahram)), [al-Bukhaaree, volume 2, pages 35-36].
And a group of women does not constitute a mahram and, likewise, nor does the Hajj package group and this does not remove her from that which is forbidden in the mentioned ahadeeth.
Shaykh Ibn Fowzaan
al-Muntaqaa min Fataawa Ibn Fowzaan – Volume 3, Page 168, Fatwa No.252.fatwaonline.com