The airline continues in business
but credit card problems led to the action.
"The low-fare carrier said its filing Friday came after an unexpected attempt by its principal credit card processor to start withholding significant proceeds from the sale of Frontier tickets, which threatened to hurt Frontier's liquidity.
The Chapter 11 filing in U.S. Bankruptcy Court in New York prevents the credit card processor from increasing its ''holdback,'' Frontier CEO Sean Menke said."