What is the model of the plane that was used by "flight 93" at 9/11 day? On September 11, 2001, the United Airlines Boeing 757-222, registered N591UA, was one of four planes hijacked as part of the September 11, 2001 terrorist attacks. It didn't reach its intended target, instead crashing in an empty field just outside Shanksville, Pennsylvania, about 150 miles northwest of Washington, D.C. |