Prayer: If I work 35 km away and stay in the work city for a few nights, do I pray full or qasr? What about visiting relatives in another city like Semnan?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If I work 35 km away and stay in the work city for a few nights, do I pray full or qasr? What about visiting relatives in another city like Semnan?

English:

Question #643:

I am an employee at a government office in a city, and the distance between my work place and residence is about 35 km. Every day, I travel this distance to reach my work place. How am I to perform my prayers when I have a special assignment and intend to stay in the city (place of my work) for several nights? Is it obligatory to perform my prayer in full? If, for example, I travel to the city of Semnan on Friday to visit my relatives, is it obligatory to perform my prayer in full or not?

Answer #643:

If the journey is not for the sake of your job for which you travel daily, the rule of traveling for work will not apply to it. But if the journey is for the sake of the job itself and during it you do other things in the place of your work, such as visiting relatives and friends, and sometimes you stay there for one or more nights, the rule of traveling for work will not change because of this, and you will perform your prayers in full and fast.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer