It is advisable and masnun that except for emergent and compelling needs one must not travel alone, and that at least two men should go together. (This is the verdict of the scholars of traditions and theologians). It is masnun to set out on a journey on Thursday. Monday is also commendable.
The Holy Prophet (Sallallahu Alaihi Wa Sallam) has directed that one should return to his home as soon as the object of a journey has been achieved. It is not desirable to prolong the journey unnecessarily. On returning from a long journey, it is masnun that one should not enter his house all of a sudden. He should first inform the family about his arrival and then enter the house. If the family has advance information about one’s program and is expecting him, then there is no harm in entering his house straightway. By conforming to Sunnah, one gains the good of this world as well as of the next.
It is masnun that on return from a journey one should offer two rakaats of Saiaah before entering the house. [Zadul Ma’ad]