Airlines companies shares down at 10 a.m.

Shares of some top airlines companies are down at 10 a.m.:

Delta Air fell $.47 or 1.2 percent, to $38.13.

JetBlue Airways Corp. fell $.16 or 1.4 percent, to $10.74.

Southwest Airlines Co. fell $.23 or .8 percent, to $27.48.

United Continental Holdings Inc. fell $.37 or .9 percent, to $39.51.