Southwest has customers sounding off after the airline announced an end to its checked bag policy, leading some flyers to say they'll "boycott" the airline.

Bags fly free no more at Southwest Airlines, a perk that has been one the big selling points for the company in its 54-year history. On Tuesday, a new page is being written as the airline goes through some turbulent changes.

Southwest Airlines said on Tuesday it would start charging some customers for checked bags, ending a unique free policy, as the company's lackluster earnings have fueled pressure to revamp its business model.

Who doesn't like to save money when flying? For many, that savings came in not paying for baggage on Southwest Airlines. That is changing.

It was a quiet Tuesday morning at Dallas Love Field, the birthplace and headquarters of Southwest Airlines, as travelers meandered in to check their bags. Some customers were unaware of Tuesday’s news that soon the service would no longer be free.