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Founded in 2010 as Torre Pacheco Fútbol Club Pinatar in San Pedro del Pinatar, the club took the place of Club Deportivo Dolores Torre Pacheco and started playing in the Preferente Autonómica, fifth tier. The club were renamed to Fútbol Club Pinatar in 2011, and to Fútbol Club Pinatar Arena in the following year due to sponsorship reasons.
Pinatar Arena achieved their first-ever promotion to Tercera División in 2014, and moved back to their previous name FC Pinatar in the following year. In 2018, the club moved to La Unión and were renamed to Fútbol Club La Unión Atlético, due to financial problems.