Abdulaziz al-Omari was a Saudi terrorist who was one of five hijackers of American Airlines Flight 11 as part of the September 11 attacks in 2001.

The hijackers in the September 11 attacks were 19 men affiliated with Islamist jihadist organization al-Qaeda. They hailed from four countries; 15 of them were citizens of Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one from Lebanon. To carry out the attacks, the hijackers were organized into four teams each led by a pilot-trained hijacker who would commandeer the flight with three or four "muscle hijackers" who were trained to help subdue the pilots, passengers, and crew. Each team was assigned to a different flight and given a unique target to crash their respective planes into. Mohamed Atta was the assigned ringleader over all 4 groups.