Flight Records For 9/11 Planes Differ From BTS Online Database and FOIA Records

According to a Freedom of Information Act reply from the U.S. Bureau of Transportation Statistics (BTS), the last known pre-9/11 flights for three of the four aircraft involved in the terrorist attacks of September 11, 2001 took place in December, 2000, nine months before the attacks, while no pre-9/11 final flight information was provided for American Airlines flight 77 (N644AA).

However, a discovered searchable online BTS database produces the following search results for three of the four 9/11 aircraft on September 10, 2001:

AA 11 departs San Francisco (SFO): AA 09/10/2001 0198 (flight number) N334AA (tail number) BOS (destination) 22:04 (wheels-off time)

UA 175 departs San Francisco (SFO): UA 09/10/2001 0170 (flight number) N612UA (tail number) BOS (destination) 13:44 (wheels-off time)

UA 93 departs San Francisco (SFO): UA 09/10/2001 0078 (flight number) N591UA (tail number) EWR (destination) 23:15 (wheels-off time)

Detailed Statistics Departures
American Airlines Flight 11 N334AA: [Original link: https://i224.photobucket.com/albums/dd121/88Badmachine88/AABTS.jpg]
U.S. Bureau of Transportation Statistics (BTS), the last known pre-9/11 flights for three of the four aircraft involved in the terrorist attacks of September 11, 2001 took place in December, 2000, nine months before the attacks

United Airlines Flight 175 N612UA and United Airlines Flight 93 N591UA [Original link: https://i224.photobucket.com/albums/dd121/88Badmachine88/UABTS.jpg]

Detailed Statistics Departures for United Airlines Flight 175

http://i224.photobucket.com/albums/dd121/88Badmachine88/UABTS.jpg