Surgical correction of brachycephalic airway syndrome (BAS) in dogs has been reported to result in low complication rates and good long-term outcomes. Previous reports have not identified risk factors for the development of complications following BAS surgery. This retrospective study evaluated a wide variety of patient- and procedure-related, pre-operative, intra-operative, and post-operative factors for an association with the development of major postoperative complications in the short-term period following BAS surgery. The overall major complication rate, including death or euthanasia, was 4/55 (7%) dogs. Temporary tracheostomy was the only major surgical complication identified (n = 3). Multiple logistic regression identified postoperative radiographic evidence of pneumonia as associated with the development of any major complication overall, requirement of a temporary tracheostomy postoperatively, and death or euthanasia, within the short-term postoperative period. Future prospective studies should evaluate specific risk factors for an association with major complications following BAS surgery in dogs to improve patient outcomes.