Airlines companies shares up at 10 a.m.

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

Delta Air rose $.50 or 1.1 percent, to $45.26.

JetBlue Airways Corp. rose $.09 or .5 percent, to $19.51.

Southwest Airlines Co. rose $.34 or .8 percent, to $42.13.

United Continental Holdings Inc. rose $.24 or .4 percent, to $61.73.