A feisty but consistent left-back, he earned international recognition towards the end of his seven-season spell at Turf Moor, making his Scotland debut against Norway in May 1954, at the age of 28. He was then selected in the squad for the upcoming World Cup finals and was one of only 13 players who actually travelled to Switzerland, the SFA opting not to use the full complement of 22 permitted. He played in both matches at the finals as Scotland capitulated in the first round, losing to Austria (0-1) and Uruguay (0-7).
The following year, Aird left Burnley and emigrated to Gisbourne in New Zealand. There he played for Eastern Union FC, eventually earning selection for the national side. Aird played 2 full internationals for New Zealand, notably scoring in a 3-2 defeat by the Australian national side.