Low cost and regional airlines cannot be compared with full service airlines as they offer an entirely different product on typically far shorter routes where the frills do not matter as much. Our rating system for full service airlines reflects the current market offering to passengers and we have adopted what has become a travel industry standard of seven stars to reflect the very best in full service airline offerings. Low cost and regional airlines simply cannot offer a seven-star budget product, because seven stars denotes excellence. Therefore you will notice we have adopted a simple easy to follow five-star system which reflects the most important features to passengers for regional and low cost carriers. - See more at: http://www.airlineratings.com/full_service_rating_criteria.php#sthash.AKSfmVop.dpuf