LAFC overwhelms Real España in CONCACAF Champions Cup opener
Son Heung-min, David Martinez and Timothy Tillman also scored for LAFC, which will host the second leg of the two-leg, total-goals first-round matchup next Tuesday night at BMO Stadium.
Bouanga started the scoring when he converted on a penalty shot in the third minute.
Martinez scored in the 11th minute, Heung-min converted a penalty shot in the 22nd minute, then Bouanga scored again in the 24th to overwhelm the hosts at Estadio Francisco Morazán.
Tillman scored in the 39th minute for a 5-0 lead, and that was the score at halftime.
Jack Jean-Baptiste scored in the 51st minute for Real España, but that was all the 12-time Honduran champions could muster.
Bouanga added his final goal in the 71st minute to close the scoring.