Yes, but there are rules. Make sure to follow these UPS guidelines when transporting flammable liquids (such as perfumes containing alcohol):
It can only be sent via road or rail transportation.
It must be packed in sealed, waterproof containers.
It must be marked with easy to read orientation arrows and the nature of the liquid contents.
Liquid shipments of more than 4 ounces must be packed in 3 special layers.