A round-trip ticket from New York to Houston sold Thursday for $5 on the United Airlines booking system.
The sale was one of an unknown number of ticket sold after a computer glitch at one of the nation's largest airlines began to spit out ultra-low fares for about two hours.
How low? How about $2.50 for a flight from Washington, D.C., to Austin, Texas?
United Airlines officials briefly shut down the online reservation system before announcing that the problem had been fixed by early afternoon.
An airline spokeswoman said the carrier had yet to decide whether it would honor the super-low fares. But fliers who bought the ultra-cheap tickets already were pressing United through its Twitter page to make good on the deals.