Irvine continued to play for Northern Ireland, winning caps against Mexico, England and Scotland, but it was almost two-and-a-half years before he scored again in international football. His two goals in a friendly match against Israel were his last for Northern Ireland, although he did win another five caps for his country. After leaving Burnley in 1968, his inclusion in the Northern Ireland squad became less frequent and between 1969 and 1972 he did not make an appearance for the team.
Irvine continued to play for Northern Ireland, scoring against Mexico, England, and Scotland, but it took almost two-and-a-half years for him to score again in international football. His last goals for Northern Ireland were scored in a friendly match against Israel, after which he won another five caps. After leaving Burnley in 1968, his appearances for the Northern Ireland squad became less frequent, and between 1969 and 1972 he did not play for the team.