boa viagem
viagem = trip, travel
Viagem (travel)
fique seguro
Viagens seguras
Tenha uma boa viagem (have a good trip) would be the most common.
Turvallista matkaa!
"Bezpiecznej podróży!"
khair nal jao
We don't say "safe journey" - well, not literally, anyway. Our equivalent is "good journey" (boa viagem)
"Želáme Vám bezpečnú cestu"
eka suraksita yatra hai
ασφαλές ταξίδι [asfales taxeethi]