Laryngeal post-transplant lymphoproliferative disease (PTLD) is rare. Here, we describe two pediatric cases. The first, a 15-month-old who underwent liver transplantation at 5 weeks, presented with airway distress. Airway evaluation identified epiglottic and arytenoid infiltrate, and biopsy was consistent with polymorphic PTLD. The second, a 23-month-old who underwent liver transplantation at 13 months, presented with progressive stridor. Airway evaluation revealed sub-mucosal infiltrate of the epiglottis, arytenoids, post-cricoid region, and uvula. Biopsy was consistent with monomorphic PTLD. Airway findings and symptoms resolved for both after immunosuppression reduction. PTLD diagnosis requires a high index of suspicion in post-transplant patients with airway obstruction.