For traveling, the definition of boutique comes from boutique hotels, where the term refers to an intimate and stylish establishments providing incomparable experiences. Generally, boutique is also used to refer to themed lifestyle or design hotels as an opposite to big monopolies of hotel brands simply offering comfort and convenience in unsurprising and standardized package.
Boutique Airline is an airline that differentiates from the competition through unique customer experience and personalization.
In the same way as Boutique Hotels, Boutique Airline is equally significant for business, a honeymoon, and a vacation. It is a category of its own, with strong lifestyle meaning and thus positions Airline outside the traditional segmentation of four/five star Airlines.