In the course of her fourth season in the reserve ranks, Oihane made her first-team debut in a league match against Atlético Madrid on 5 January 2019.

[4] Athletic had previously finished the Spanish championship in a disappointing eleventh place, and fared only slightly better in the two subsequent campaigns (seventh in 2021–22, tenth in 2022–23).

By now established as a regular on the right flank, Oihane had made 109 competitive appearances, scoring three goals, for Athletic by the time of departing the club in the summer of 2023.

[6] On 14 February 2025, Oihane transferred to NWSL club Orlando Pride, signing a two-year contract with a mutual option.

On 2 September 2022, Oihane made her Spain senior national team debut in the penultimate game of World Cup qualifiers against Hungary, when she came on as a 77th-minute substitute for Olga Carmona.