If you're looking for a Yves Saint Laurent L'Homme fragrance, this might suit you. The 40-ml packaging is small enough for you to bring in your carry-on on a plane.
From OnBuy
Yves Saint Laurent L'Homme Eau De Toilette Spray 40ml/1.3oz
Perfumes Club
Yves Saint Laurent L’HOMME eau de toilette spray 40 ml