Shares of some top airlines companies are down at 1 p.m.:

Delta Air fell $1.95 or 4.8 percent, to $38.36.

JetBlue Airways Corp. fell $.24 or 2.2 percent, to $10.74.

Southwest Airlines Co. fell $.15 or .5 percent, to $27.58.

United Continental Holdings Inc. fell $2.36 or 5.6 percent, to $39.90.