Duaa-At The Time of His Departure.

Dua at the time of his departure:
اللَّهُمَّ إِطْوِ لَهُ الْبُعْدَ وَهَوِّنْ عَلَيْهِ السَّفَرَ
"O Allah, let his journey be covered quickly and most easily".

(Tirmidhi)