Having won the Balearic Karting Championship in 2016, Fluxá moved into the national championship as well as international competitions during the same year.[3] Following a full season spent driving in the Mini and Cadet categories, where he managed to finish fourth overall in his homeland, the Spaniard would move into OK Junior in 2018, competing in the European Championship for Lennox and qualifying for the final in the World Championship.[4] He ended his karting career in 2019, having competed in the OK Senior class - missing several events due to an injury.[5]
Lower formulae
Fluxá made his car racing debut in the Formula 4 UAE Championship in 2020 with Xcel Motorsport.[6] He won two races and finished on the podium eleven times throughout the campaign, being beaten only by teammate Francesco Pizzi, who won the title with 300 points to Fluxá's 274.
That year Fluxá also competed in the F4 Spanish Championship with GRS.[7] The Spaniard achieved sixth place in the drivers' standings, helping his team to finish fourth in the teams' championship with 99 points compared to the total of 26 scored by his three teammates.
In February 2021 it was announced that Fluxá would be making his debut in the Formula Regional European Championship with Van Amersfoort Racing, partnering F4 UAE title rival Francesco Pizzi and Mari Boya.[9] His best race finish would end up being a twelfth place at a rain-affected race in Belgium, as the Spaniard finished 25th in the championship, being the only Van Amersfoort driver to not score any points.
2022
At the beginning of 2022, Fluxá took part in the newly rebranded Formula Regional Asian Championship, driving for 3Y by R-ace GP.[10][11] Having scored a podium during the first round, Fluxá finished tenth in the championship.
For his main campaign Fluxá would move to R-ace GP, remaining in the Formula Regional European series.[12][13] His season started in strong fashion, as he took his first podium in the series at the season opening race at Monza.[14] However, following a late coming-together with teammate Gabriel Bortoleto in Race 2,[15] the Spaniard would have to wait for two rounds until scoring his next points, a pair of eighth-place finishes at Le Castellet.[16] More points followed at Spa-Francorchamps, where Fluxá managed to finish fifth,[17] before getting two points at the events in Austria and Spain respectively. He finished his season with another fifth place, this time at Mugello, which meant that Fluxá ended up twelfth in the standings, behind his teammates Hadrien David and Bortoleto.[18]
The Spaniard opted to remain in FRECA for a third successive season in 2023, switching to Prema Racing to partner Andrea Kimi Antonelli and Rafael Câmara.[20] Having taken fourth-place results in the opening pair of rounds, Fluxá would score his best result in his three years in the category at the Hungaroring, ending up second in race 2.[21] More points at Spa and Mugello followed, before Fluxá experienced a scoreless round in Le Castellet.
Fluxá comes from a wealthy family which founded and owns notable Spanish companies Iberostar, Lottusse [es] and Camper.[1][27] His younger brother Lucas competes in Spanish F4, and his younger sister Luna currently competes in karting.[28] Luna has been a part of the Mercedes Junior Team since 2022.