Ihram is of three kinds:
1. Qiran (combining both ‘Umrah and Hajj).
2. Tamattu’ (combining both Hajj and ‘Umrah with a break in between), and
3. Ifrad (Hajj only).
There is consensus among scholars that all these three kinds are legitimate.
‘Aishah reported: “We left (Madinah) with Allah’s Messenger (peace be upon him) to perform the Farewell Hajj. Some of us declared ihram to perform ‘Umrah, while others declared their intentions to perform both Hajj and ‘Umrah. Yet others declared their ihram to perform Hajj only. The Prophet (peace be upon him) declared ihram for Hajj only.
As for those who intended ‘Umrah, they terminated their ihram as soon as they finished the rituals of ‘Umrah. Those who intended to combine Hajj with ‘Umrah or those who intended to perform Hajj only, they did not terminate their ihram until the Slaughtering Day (Yawm un-Nahr), the 10th of Zhul-Hijjah.” (Reported by Ahmad, Bukhan, Muslim and Malik)