Actually, you don’t have to tell Southwest anything, because after it basically did away with its most-loved passenger perk, another airline – the much-smaller, Frontier Airlines – saw an opportunity to send the same message.

On March 18, the airline announced low fares, free checked bags and free flight changes. Frontier seized the opportunity after Southwest discontinued its long-standing free checke

Frontier Airlines took a swipe at Southwest Airlines’ plan to start charging for seat assignments and checked luggage by doing the opposite.