When the Messenger of Allah (ﷺ) proceeded on journey, he would say: O Allah, Thou art the Companion in the journey, and the One Who looks after the family; O Allah, I seek refuge in Thee from the difficulty of travelling, finding harm when I return, and unhappiness in what I see coming to my family and property. O Allah, make the length of his journey short for us, and the journey easy for us.

The beautiful Dua in this Hadith is:

اللَّهُمَّ أَنْتَ الصَّاحِبُ فِي السَّفَرِ وَالْخَلِيفَةُ فِي الأَهْلِ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ وَعْثَاءِ السَّفَرِ وَكَآبَةِ الْمُنْقَلَبِ وَسُوءِ الْمَنْظَرِ فِيالأَهْلِ وَالْمَالِ اللَّهُمَّ اطْوِ لَنَا الأَرْضَ وَهَوِّنْ عَلَيْنَا السَّفَرَ