The company advertises and sells Taylair, Vice City Air and East Sky Airlines plane tickets to their customers. CJ, however, can neither enter the store nor buy any tickets from there. The company plays no role in the storyline whatsoever. The logo on the other hand clearly showcases an out of control plane that is on the verge of crashing.
Written on the sign is "Agencia De viajes", or "Travel Agency" in Spanish, implying that the company focuses on the Hispanic/Latino community of Los Santos, and/or is a Latin American-based company.
Uni-Tel may take its name from a now-defunct real-life travel agency located in Los Angeles, which was active during the early 2000s.