Safar ki Dua or Dua for traveling is suggested by the Holy Prophet (PBUH). He (SAW) instructed that one should recite these verses before riding and starting the journey. I have personally experienced that it works miraculously. Please download it and share it with your loved ones who often travel.
Listen Safar Ki Dua
Safar ki Dua for Family
Moreover, if you are not going on any journey but anyone of your family or friends is departing for somewhere, you can also recite a dua. It is mentioned in Sunan Abi Dawud that the Holy Prophet (PBUH) instructed this dua.