اللَّهُمَّ إِنِّي أَسْأَلُكَ الْعَافِيَةَ فِي الدُّنْيَا وَالْآخِرَةِ
Allahumma inni as'alukal-'afiyata fid-dunya wal-akhirah
O Allah, I ask You for well-being in this world and the Hereafter.
A general dua suitable for travel and all occasions
Asking for complete well-being in both worlds.