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