| Potomac to Illzach | 4,072.66 mi (6,554.31 km) |
| Potomac to Ingre | 3,834.59 mi (6,171.17 km) |
| Potomac to Irigny | 4,026.92 mi (6,480.71 km) |
| Potomac to Isbergues | 3,792.47 mi (6,103.40 km) |
| Potomac to Issoire | 3,961.65 mi (6,375.66 km) |
| Potomac to Issoudun | 3,867.71 mi (6,224.48 km) |
| Potomac to Issy-les-Moulineaux | 3,830.08 mi (6,163.92 km) |
| Potomac to Istres | 4,099.38 mi (6,597.31 km) |
| Potomac to Ivry-sur-Seine | 3,834.91 mi (6,171.70 km) |
| Potomac to Jarville-la-Malgrange | 3,999.18 mi (6,436.06 km) |
| Potomac to Jeumont | 3,868.11 mi (6,225.13 km) |
| Potomac to Joigny | 3,900.11 mi (6,276.63 km) |
| Potomac to Joinville-le-Pont | 3,838.70 mi (6,177.79 km) |
| Potomac to Joue-les-Tours | 3,799.27 mi (6,114.34 km) |
| Potomac to Jouy-le-Moutier | 3,815.53 mi (6,140.50 km) |
