The eminent Muslim scholar and renowned Da`iyah, Sheikh `Abdel Khaliq Hasan Ash-Shareef, states: `Umrah can be performed in a few hours in a way that enables one to perform the rituals of `Umrah including tawaf, sa`i and trimming your hair. Also, one can travel to perform `Umrah without mahram, there is nothing wrong in that as long as one is traveling in a safe company and your security is guaranteed.”
Allah Almighty knows best.