Southwest to fly nonstop between Los Angeles and Cancun, Los Cabos, and Puerto Vallarta American Journal of Transportation Travel to Cancun, Cabo San Lucas/Los Cabos and Puerto Vallarta is valid only on Sundays through Wednesdays. Travel from Cancun, Cabo San Lucas/Los Cabos and Puerto Vallarta is valid only on Tuesdays through Fridays. Fares are valid only on ... |