US Airways, United, Continental and Delta confirmed that they raised prices.
Jamie Baker, an analyst for J.P. Morgan Chase, said the increases of $6 to $10 were applied to last-minute tickets favored by corporate travelers. He said the move, led by US Airways, appeared to back up the company’s comments that demand for business travel has held up.
Baker said the airlines did not increase prices on tickets requiring an advance purchase. Those are usually bought by leisure travelers.