PHOENIX (CBS5) -
Arizona attorney general Tom Horne has joined five other states in suing to block the merger, saying fewer airlines will mean less competition and drive up rates.
At Sky Harbor International Airport, the same fears were heard among travelers.
"I'm a little bit concerned because there's going to be a lot less competition and so I'm worried that rates are going to be going up," said Cynthia Goelz.
"I don't like aggregation of business, when it becomes huge, and they make all the money, and everything else has to pay the price," said's Tom Pitner.
The potential merger of Tempe-based U.S. Airways and Dallas-based American is on a lot of people's minds because of the impact it may have on their wallets.
"You're getting charged for everything you do on an airplane," Pitner said.
"It means higher prices for airline tickets, and it means less choices," Horne said. He is joining Florida, Pennsylvania, Texas, Tennessee, Virginia and the District of Columbia in suing to stop the merger.
He said the reason isn't rocket science.
"Any high school kid who's taken economics knows when you only have four companies dominating the market, that's not real competition," Horne said.
And although a recent PriceWaterhouseCoopers study shows mergers in the past haven't done much of anything to the fares, Horne said they believe a merger this big will hurt the little guy.
"In our lawsuit, we quote an officer of one of these companies that because of consolidation, which means less companies, we have been able to raise fares," Horne said.
Some travelers are waiting to see what happens, while others come up with a backup plan.
"We need high speed rails, that's what we need," Pitner said.
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