This Chanel EdP could work well for a number of occasions. The 60-ml packaging is small enough for you to bring in your carry-on on a plane.
From Notino
Chanel N°5 eau de parfum refill with atomiser for women 60 ml
AllBeauty
Chanel - No. 5 60ml Eau de Parfum Refill Spray for Women
Perfumes Club
Nº 5 eau de parfum spray refill 60 ml