Ónega was born in
Madrid on 30 November 1977. The daughter of journalist and speechwriter
Fernando Ónega and Marisol Salcedo, she received a journalism degree from the
Universidad CEU San Pablo in Madrid. She is the sister of fellow journalist Cristina Ónega. She started her journalism career at
CNN+ and joined
Noticias Cuatro upon the launch of
Cuatro in 2005. In 2008 she jumped ship to
Informativos Telecinco, where she was parliamentary correspondent at the
Congreso de los Diputados for ten years. In 2004, she started a literary career with her short story
Calle Habana, esquina Obispo, and followed it up with
Donde Dios no estuvo, based on the
2004 train bombings. Her greatest success came in 2017 with the novel
Después del amor, set in the
Second Republic. In 2017, she was awarded the
Fernando Lara Novel Award for her novel
Después del amor todo son palabras (). In 2018, she left her journalism post to host
Telecinco chat show
Ya es mediodía, and in 2020 she presented reality show
La casa fuerte. In 2022, she moved to
Antena 3, disillusioned with Telecinco, to present daytime chat show
Y ahora Sonsoles. The show received good ratings, and was brought back for a second series. In 2023, she was awarded with the
Premio Planeta de Novela for her novel Las hijas de la criada (). ==Private life==