Take care, and have a nice flight.

请保重！祝你一路顺风！

We wished her godspeed.

我们祝她一路顺风。

May you have a fine trip!

祝你一路顺风！

I hope you'll have a very pleasant journey.

祝你一路顺风，旅途快活。

Have a splendid voyage.

一路顺风。

Have a good journey!

一路顺风!

I wish both of you a fine trip.

祝你们俩一路顺风。

May you have favourable winds on the way.

一路顺风！