The straight-line distance between the Arc de Triomphe and Notre-Dame Cathedral is approximately 2.8 kilometers (1.7 miles).
On foot, the walk takes about 35–40 minutes via the most direct route (Avenue de la Grande Armée → Champs-Élysées → Place de la Concorde → Seine quays). By Metro, take Line 1 from Charles de Gaulle–Étoile to Châtelet (2 stops), then Line 4 to Cité (1 stop)—about 15 minutes total. By taxi or rideshare, allow 15–25 minutes depending on traffic.
Both landmarks lie along the historic axe historique (historical axis) of Paris, making the journey itself a sightseeing experience through the heart of the city.