Flight 11 -1st jet

7:59		Take off
8:13		Boston Control Center: “AAL11 turn 20 degrees right.” AAL11: “20 right AAL11.” Controller: “AAL11 now climb maintain FL350 [35,000 feet].” Controller: “AAL11 climb maintain FL350.” Controller: “AAL11 Boston.”8:00:00 Plane takes off.
8:14:33		Controller A: “AAL11 ah the American on the frequency how do you hear me?” Controller B breaks in: “This is Athens.” A: “This is Boston. I turned American 20 left and I was going to climb him he will not respond to me now at all.” B: “Looks like he’s turning right.“ A: “Yea, I turned him right.” B:“Oh, O.K.” A: “And he’s only going to um I think 29.” B: “Sure that’s fine.” A: “Eh, but I'm not talking to him.” B: “He won‘t answer you. He’s nordo [no radar] roger. Thanks.”
8:24:38		Hijackers’ voices heard: “We have some planes just stay quiet and you will be O.K. we are returning to the airport. Nobody move everything will be O.K. if you try to make any moves you’ll endanger yourself and the airplane just stay quiet.”
8:25:00		The control tower notifies several air traffic control centers that a hijack is in progress.
8:33:59		Hijackers’ voices heard: “Nobody move please we are going back to the airport don’t try to make any stupid moves.”
8:47:00	........	Plane crashes into the north tower of the World Trade Center..

7:59		American Airlines flight 11 takes off from Boston's Logan International Airport.
8:20		American Airlines flight 11 stops transmitting IFF beacon signal while over the Hudson River.
8:38		Boston air traffic center notifies NORAD that American Airlines flight 11 has been hijacked.
8:46		American Airlines flight 11 strikes the World Trade Center's north tower.

NORAD timeline

American Airlines Flight 11 – Boston enroute to Los Angeles

FAA Notification to NEADS 0840*

Fighter Scramble Order (Otis Air National Guard Base, Falmouth, Mass. Two F-15s) 0846**

Fighters Airborne 0852

Airline Impact Time (World Trade Center 1) 0846 (estimated)***

Fighter Time/Distance from Airline Impact Location Aircraft not airborne/153 miles