While both حج and عمرہ are حجs to the Sacred Mosque (al-مسجد الحرام) in مکہ مکرمہ involving طواف and سعی, they differ significantly in their timing, scope, obligation, and spiritual weight. حج is the 'greater حج' and can only be performed during the specific days of Dhul Hijjah — the 8th through the 12th or 13th of the month. It involves a comprehensive set of rites spread across multiple locations: مکہ مکرمہ, منیٰ, عرفات, and مزدلفہ. عمرہ, often called the 'lesser حج,' can be performed at any time throughout the year and consists of only four acts: entering احرام, performing طواف around the کعبۃ اللہ, performing سعی between Safa and Marwah, and shaving or cutting the hair.
In terms of obligation, حج is unanimously considered one of the five pillars of Islam and is واجب (fard) once in a lifetime for every able Muslim. عمرہ's obligation is debated: the Shafi'i and Hanbali schools consider it واجب once in a lifetime, while the Hanafi and Maliki schools consider it a strongly مستحب Sunnah (sunnah mu'akkadah) but not واجب. Both حجs begin with entering the state of احرام at the designated miqat points and share the rites of طواف and سعی, but حج adds the critical rites of standing at عرفات, spending the night at مزدلفہ, stoning the three pillars at منیٰ, offering an animal sacrifice, and performing a farewell طواف.
Practically, حج typically requires 5-6 days to complete all rites (some حجاج stay longer), while عمرہ can be completed in as little as 2-4 hours for the actual rituals, though most حجاج spend several days in مکہ مکرمہ. حج is significantly more expensive (ranging from $5,000 to $15,000+ depending on the country of origin and package) due to the fixed timing creating high demand, while عمرہ is more affordable and flexible. Both are deeply rewarding spiritual experiences, and نبی کریم (صلی اللہ علیہ وسلم) said that 'عمرہ to عمرہ is an expiation for the sins between them, and an accepted حج has no reward but Paradise.'