Already, airlines are charging passengers for extra baggage and bottled water to recoup costs. Now the nation's smaller airports might begin to see flights cuts, The (Portland) Oregonian reported Sunday.

Industry analysts say high fuel costs alone have changed the way U.S. airlines do business.

"We are at a critical time in the industry," said Darin Lee of LECG, an economics consulting firm based in Cambridge, Mass. "What we're seeing is a very unique situation."

The newspaper reported at least six airlines have filed for Chapter 11 bankruptcy protection so far this year, while several others are on the verge of bankruptcy.

"If an airline's prices were to rise to cover their costs and also include a reasonable return, I think we'll get to a point where people who used to travel won't be able to anymore," Lee was quoted as saying.