| Potomac to Imola | 4,367.68 mi (7,029.10 km) |
| Potomac to Impruneta | 4,370.41 mi (7,033.49 km) |
| Potomac to Induno Olona | 4,194.89 mi (6,751.02 km) |
| Potomac to Inverigo | 4,215.00 mi (6,783.38 km) |
| Potomac to Inveruno | 4,206.19 mi (6,769.21 km) |
| Potomac to Inzago | 4,232.82 mi (6,812.07 km) |
| Potomac to Iseo | 4,253.13 mi (6,844.75 km) |
| Potomac to Isernia | 4,574.47 mi (7,361.89 km) |
| Potomac to Isola Capo Rizzuto | 4,800.25 mi (7,725.25 km) |
| Potomac to Isola del Liri | 4,542.39 mi (7,310.28 km) |
| Potomac to Isola della Scala | 4,306.73 mi (6,931.01 km) |
| Potomac to Isola Vicentina | 4,313.28 mi (6,941.56 km) |
| Potomac to Ispica | 4,785.08 mi (7,700.84 km) |
| Potomac to Istrana | 4,339.08 mi (6,983.07 km) |
| Potomac to Itri | 4,555.00 mi (7,330.57 km) |
