| Imperial Beach to Orbetello | 6,307.32 mi (10,150.64 km) |
| Imperial Beach to Oria | 6,621.10 mi (10,655.64 km) |
| Imperial Beach to Oristano | 6,345.03 mi (10,211.33 km) |
| Imperial Beach to Orta Nova | 6,514.37 mi (10,483.87 km) |
| Imperial Beach to Orte | 6,345.47 mi (10,212.05 km) |
| Imperial Beach to Ortona | 6,417.20 mi (10,327.49 km) |
| Imperial Beach to Orvieto | 6,322.81 mi (10,175.58 km) |
| Imperial Beach to Orzinuovi | 6,112.45 mi (9,837.03 km) |
| Imperial Beach to Osimo | 6,327.28 mi (10,182.77 km) |
| Imperial Beach to Ospitaletto | 6,109.06 mi (9,831.58 km) |
| Imperial Beach to Ostuni | 6,606.65 mi (10,632.38 km) |
| Imperial Beach to Ottaviano | 6,500.07 mi (10,460.85 km) |
| Imperial Beach to Ovada | 6,108.42 mi (9,830.55 km) |
| Imperial Beach to Ozieri | 6,325.57 mi (10,180.02 km) |
| Imperial Beach to Paceco | 6,585.94 mi (10,599.05 km) |
