Why does Alan Stanwyk have his own name on his flight reservation?
When Fletch goes to the airport ticket counter, the ticket agent advises Fletch that the reservation is under the name of "Alan Stanwyk", but Alan's scheme is to kill Fletch's alter ego, Ted Nugent, and then fly to Rio with his passport.
Would have made sense for him to book the flight under Ted Nugent because Fletch used that as his name when he met him, could have backfired if he really killed Fletch or maybe he thought that nobody would ever catch on because he thought that Fletch was just a Drifter and Junkie so nobody would notice if he just disappeared.