United mistakenly uses flight 93 and 175.

by David Veloz

United flight 93 and 175 briefly reappeared on United’s automated flight designation system today, sparking a bit of controversy between the airline and the unions representing pilots and flight attendants.  United said the error was due to two Continental flights being designated as flights 93 and 175.  The company has now said it has permanently retired both flight designations.  Mistakes happens.