Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa. – Volume 11, Page 20, Fatwa No. 5866
Question: What is the ruling regarding a wife who leaves to perform the obligatory {first] Hajj without her husband’s permission?
Response: The obligatory Hajj is [only] obligatory if [all] its conditions are satisfied and [seeking] the permission of the husband is not from amongst them. It is not permissible for him to prevent her, rather, it is legislated for him to assist her in performing this obligation.
And with Allaah lies all success and may Allaah send prayers and salutations upon our Prophet ﷺ and his family and his companions.