Los Santos Air

San Fierro air is a fictional airline mentioned in Grand Theft Auto V. It has terminal at Los Santos  International Airport. Its headquarters are possibly at San Fierro. No aircrafts are seen at LSIA and the airline is not advertised. Only a sign can be seen at terminal 4 writing Los Santos Air.

Trivia

 * Maybe Rockstar was planing to add planes and advertiements of the company.
 * there is an Unknown private jet at the background of the shamal picture at the Elitas Travel purchase page in Grand Theft Auto V. It is possible that these planes belonged to this company or they are San Fierro Air belongings.