Atrial arrhythmias (AA) are common post-lung transplant (LT). While the majority tend to be organized flutters, mechanistic data is lacking. We studied all LT recipients undergoing AA ablation at our institution over a 7-year period. We identified 20 ablations in 16 patients. The most common primary AA identified was macro-reentrant flutter originating at the pulmonary vein anastomosis sites. During follow-up, 9 patients experienced recurrence and 4 required repeat ablations. In univariable analysis, only left atrial enlargement was associated with repeat ablation. Our study demonstrates the safety and efficacy of AA ablation in a contemporary cohort of LT recipients.