 Del Solar earned 74 caps for Peru, in which he scored nine goals.He made his debut on 28 January 1986 against China (1–3), playing his last international match on 8 November 2001 against Argentina (0–2), 20 days before his 34th birthday.Del Solar was selected to six Copa América tournaments, netting three times in four matches – twice through penalties – as the national team reached the quarter-finals in the 1993 edition, in Ecuador.