my trip to france
To say have a great trip in French it's " Ayez un grand voyage!"
bon voyage!
she is going on a trip = elle part en voyage
Notre voyage en France
"pendant le voyage"
Have a nice trip = Bon voyage! (Not sure what you mean by "When you are flight".
vous partez en voyage
comment se passe votre voyage?
Faites un bon voyage
comment s'est passé ton excursion
"bon voyage !" or "faites bon voyage !"