Can Muslim women go alone on hajj without a male companion?

No, there are certain conditions required to be fulfilled that makes Hajj an obligation on Muslim women. The first condition which makes Hajj obligatory on Muslim women is the presence of Mahram (male companion/allowable escort during travel). A woman who intends to perform Hajj should find a company of a mahram. It is also necessary to provide all the related documents which are evident to the relationship of a woman with her mahram.

An exception to the rule of the necessity of a Mahram
According to the rules and regulation set forth by the Saudi government, a woman who is above an age of 45 is allowed to go on a religious journey of Hajj with fellow pilgrims. In this case, she is required to submit N.O.C from her mahram and must travel with an organized group.

Hajj Conditions for a Married Woman
It is recommended for a married woman to request her husband’s permission before beginning her journey for a grand pilgrimage.

Hajj Conditions for a Widow
In case of a widow, she is not allowed to embark on any journey even if it’s Hajj. Once she is free of the post-divorce or mourning period (iddah), she may perform her religious obligations provided all other conditions are fulfilled.