This 100-ml packaging is small enough for you to bring in your carry-on on a plane. A Miller Harris EdP could work well for a number of occasions.
From Amazon
Miller Harris Poirier d'un Soir Eau de Parfum | Woody, Fruity, Pear Perfume (100ml)
Notino
Miller Harris Poirier D'un Soir eau de parfum unisex 100 ml