Most of his playing days were spent with Elche (13 seasons, 11 of those in La Liga, where he amassed totals of 252 games – a best-ever in the club – and four goals), whereas his manager career was closely associated with Mallorca, in various capacities.
Born in Inca, Majorca, Llompart signed for Elche CF in 1964 at the age of 19, after spending one season in Segunda División with local club CD Constancia.
He made his La Liga debut on 20 September 1964 in a 0–1 home loss to Sevilla FC, scoring his first goal in the competition roughly one year later, against the same opponent (1–1, same venue).
Already as captain, Llompart, who played 125 consecutive games in the top level with his main club, helped to a presence in 1969 Copa del Generalísimo final, lost against Athletic Bilbao.
In the 1990–91 campaign he first worked with the professionals, being relegated from the second division with Orihuela Deportiva CF even though he led the team to the sixth position, for financial irregularities.