Celtic are in Bosnia to play Sarajevo in the first qualifying round of the Champions League, kick off 6.45pm BST.
Rangers face St Joseph's of Gibraltar in qualifying round one of the Europa League, kick-off 4.55pm BST.
Aberdeen are at home to RoPS of Finland on Thursday evening while Kilmarnock make their European return against Connah's Quay Nomads in Rhyl on the same night.