| Massillon to Orbetello | 4,528.20 mi (7,287.43 km) |
| Massillon to Oria | 4,876.23 mi (7,847.54 km) |
| Massillon to Oristano | 4,511.81 mi (7,261.05 km) |
| Massillon to Orta Nova | 4,761.54 mi (7,662.96 km) |
| Massillon to Orte | 4,576.94 mi (7,365.87 km) |
| Massillon to Ortona | 4,665.57 mi (7,508.51 km) |
| Massillon to Orvieto | 4,555.31 mi (7,331.06 km) |
| Massillon to Orzinuovi | 4,363.64 mi (7,022.60 km) |
| Massillon to Osimo | 4,582.68 mi (7,375.10 km) |
| Massillon to Ospitaletto | 4,363.72 mi (7,022.72 km) |
| Massillon to Ostuni | 4,864.33 mi (7,828.39 km) |
| Massillon to Ottaviano | 4,729.27 mi (7,611.02 km) |
| Massillon to Ovada | 4,337.92 mi (6,981.21 km) |
| Massillon to Ozieri | 4,504.01 mi (7,248.50 km) |
| Massillon to Paceco | 4,762.26 mi (7,664.11 km) |
