| McComb to Orbetello | 5,331.21 mi (8,579.75 km) |
| McComb to Oria | 5,683.01 mi (9,145.92 km) |
| McComb to Oristano | 5,301.93 mi (8,532.64 km) |
| McComb to Orta Nova | 5,567.76 mi (8,960.45 km) |
| McComb to Orte | 5,381.66 mi (8,660.94 km) |
| McComb to Ortona | 5,472.72 mi (8,807.50 km) |
| McComb to Orvieto | 5,360.39 mi (8,626.72 km) |
| McComb to Orzinuovi | 5,173.47 mi (8,325.89 km) |
| McComb to Osimo | 5,391.63 mi (8,676.99 km) |
| McComb to Ospitaletto | 5,174.10 mi (8,326.91 km) |
| McComb to Ostuni | 5,671.64 mi (9,127.62 km) |
| McComb to Ottaviano | 5,532.34 mi (8,903.44 km) |
| McComb to Ovada | 5,144.13 mi (8,278.68 km) |
| McComb to Ozieri | 5,297.38 mi (8,525.31 km) |
| McComb to Paceco | 5,552.65 mi (8,936.12 km) |
