Answered by Shaykh Faraz Rabbani
How much of Friday Khutbah do you need to listen to for your Friday prayer to be valid?
Walaikum assalam wa rahmatullah,
In the Name of Allah, Most Merciful and Compassionate
1. Attending the khutba is a necessary duty, and it is sinful to be late for the khutba. It is necessary, too, to take the means to be able to attend the khutba in full; and anything that delays one’s attendance of the khutba–even an otherwise praiseworthy matter such as a sunna ghusl for Friday–is interdicted, because of the Divine Command, “… if the call to prayer is given on Friday, then hasten to the remembrance of Allah [f: namely, the khutba] and leave your trade.” [Qur’an]
2. However, the validity of one’s Friday prayer itself is not contingent upon attending the khutba. Rather, one’s Friday prayer itself is valid and counts even if one joined the congregation at the very end.
[Ref: Ibn Abidin, Radd al-Muhtar; Shurunbulali, Maraqi al-Falah]
And Allah alone gives success.