Women are permitted to combine and shorten prayers during Hajj in exactly the same manner as men. There is no distinction between men and women regarding the concessions of combining (jam) and shortening (qasr) prayers during travel and at the specific Hajj sites. All scholars agree that the rulings of combining prayers at Arafat and Muzdalifah apply equally to women.
At Arafat, all pilgrims — men and women — combine Dhuhr and Asr prayers at the time of Dhuhr (jam taqdim), shortening each to two rak'ahs. At Muzdalifah, they combine Maghrib and Isha at the time of Isha (jam ta'khir), with Isha shortened to two rak'ahs. Sheikh Ibn Baz confirmed that these concessions are Sunnah and apply to every pilgrim regardless of gender.
Sheikh Ibn Uthaymeen further clarified that women who are traveling for Hajj may shorten the four-rak'ah prayers (Dhuhr, Asr, and Isha) to two rak'ahs throughout their journey, just as male travelers do. The shortening applies when they are considered travelers, and the combining applies at the specific Hajj locations as part of the Sunnah of the Prophet. Women who are residents of Makkah shorten at Arafat and Muzdalifah due to the Sunnah of the rite, not due to travel.