Blending online delivery methods with traditional face-to-face instruction has emerged in an effort to accommodate an increasingly diverse student population whilst adding value to the learning environ-ment. A large number of research studies have shown a positive effect of blended learning for teaching and learning. However, designing a successful blended learning course is still challenging for many academics in the higher education sector. A major design problem is selecting the most appropriate delivery methods to achieve the course outcomes. This study contributes to addressing this problem by: (i) identifying criteria that teachers should consider when selecting delivery methods for their blended learning courses; and (ii) rating the importance of each of these criteria. It employs a two-round online modified Delphi survey to achieve its aims.