| South Bend to Orbetello | 4,688.45 mi (7,545.33 km) |
| South Bend to Oria | 5,031.40 mi (8,097.25 km) |
| South Bend to Oristano | 4,683.78 mi (7,537.82 km) |
| South Bend to Orta Nova | 4,917.65 mi (7,914.20 km) |
| South Bend to Orte | 4,735.23 mi (7,620.62 km) |
| South Bend to Ortona | 4,820.88 mi (7,758.45 km) |
| South Bend to Orvieto | 4,713.26 mi (7,585.27 km) |
| South Bend to Orzinuovi | 4,516.53 mi (7,268.66 km) |
| South Bend to Osimo | 4,736.04 mi (7,621.92 km) |
| South Bend to Ospitaletto | 4,515.88 mi (7,267.61 km) |
| South Bend to Ostuni | 5,018.92 mi (8,077.17 km) |
| South Bend to Ottaviano | 4,888.89 mi (7,867.91 km) |
| South Bend to Ovada | 4,495.25 mi (7,234.40 km) |
| South Bend to Ozieri | 4,673.34 mi (7,521.01 km) |
| South Bend to Paceco | 4,933.28 mi (7,939.35 km) |
