‏الحج : Hadeeth No:3098 'Abdullah b. Umar (Allaah -be pleased with them) reported Allaah's Prophet (sallAllaahu alayhi wa sallam) as saying: It is not lawful for a woman who believes in Allaah and the Hereafter to travel for more than three nights journey except when there is a Mahram with her....

‏البر والصلة والآداب‏ : Hadeeth No:6269 This hadith has been reported on the authority of Ibn Munkadir with the same chain of transmitters but with a slight variation of wording....