Good luck, and God bless.
Have a wonderful time!
Safe travels, my friend.
Tell them all I said "Hi!"
O God, Who led the children of Israel safely through the Red Sea, and guided the Wise Men by a star to the Savior; grant us, we beseech Thee, safe journey and favorable weather; so that, under the guidance of Thy Holy Angels, we may safely reach our destination and, in due time, the gate of eternal salvation.
Through the same Christ Our Lord, Amen.
Tell us all about it!
...And avoid international incidents.
Wishing you safe travels and a wonderful trip!