Have a safe trip

Have a safe trip.

 and Have a safe journey.

I hope that your journey is safe.; Be careful and assure that your journey is safe. (Said as someone is about to leave for a trip.) Bill: Well, we're off for London. Sally: Have a safe trip. Bill: You're driving all the way to San Francisco? Bob: Yes, indeed. Bill: Well, have a safe trip.

See also: have, safe, trip