| Fall River to Orbetello | 4,041.01 mi (6,503.38 km) |
| Fall River to Oria | 4,394.13 mi (7,071.67 km) |
| Fall River to Oristano | 4,010.15 mi (6,453.72 km) |
| Fall River to Orta Nova | 4,278.71 mi (6,885.92 km) |
| Fall River to Orte | 4,092.07 mi (6,585.55 km) |
| Fall River to Ortona | 4,184.22 mi (6,733.85 km) |
| Fall River to Orvieto | 4,070.98 mi (6,551.61 km) |
| Fall River to Orzinuovi | 3,886.99 mi (6,255.50 km) |
| Fall River to Osimo | 4,104.29 mi (6,605.21 km) |
| Fall River to Ospitaletto | 3,888.05 mi (6,257.21 km) |
| Fall River to Ostuni | 4,383.05 mi (7,053.83 km) |
| Fall River to Ottaviano | 4,242.04 mi (6,826.90 km) |
| Fall River to Ovada | 3,855.44 mi (6,204.73 km) |
| Fall River to Ozieri | 4,005.55 mi (6,446.31 km) |
| Fall River to Paceco | 4,260.88 mi (6,857.22 km) |
