Right-sided aortic arches are rare, affecting approximately 0.1% of the population. They are a result of abnormal development
of the primitive aortic arches and may present later in life with later life with aneurysmal expansion of the aberrant left
subclavian artery ‘Kommerell’s diverticulum’. These can be challenging to treat effectively. We report a rare case presenting
with mild dysphagia and right-sided aneurysmal aortic arch with aneurysmal aberrant left-sided. The patient underwent
hybrid endovascular repair incorporating bilateral carotid–subclavian bypasses and dual-arch-branch endograft placement to
the left and right common carotid arteries. Although endovascular approaches have been described, there are no reports of
branched endografts in this scenario. Right-sided aneurysmal aortic arch and the aneurysmal aberrant left subclavian artery
are rare and represent a significant therapeutic challenge. Endovascular repair in conjunction with extra-anatomical bypass
utilising a custom-made branched thoracic endograft is feasible.