Cylindrical Object Seen Next To Airplane

Saw an airplane size cylindrical object whooshing flying east past the airplane, enroute west to Laughlin. Had no wings whatsoever and left a white contrail of sorts. It must have been about a hundred feet long and rocket shaped. And passed the airplane about two football fields away from the airplane at the same elevation. It was whitish to grey in color and had no windows, no lights and no markings of any kind.. Was seen by at least another passenger as well. The airplane was from Frontier on flight #5878 flying from El Paso to Laughlin at 3:30 in the afternoon.