| Westmont to Orbetello | 6,268.96 mi (10,088.92 km) |
| Westmont to Oria | 6,577.84 mi (10,586.00 km) |
| Westmont to Oristano | 6,312.81 mi (10,159.49 km) |
| Westmont to Orta Nova | 6,472.37 mi (10,416.27 km) |
| Westmont to Orte | 6,305.82 mi (10,148.23 km) |
| Westmont to Ortona | 6,375.47 mi (10,260.33 km) |
| Westmont to Orvieto | 6,283.14 mi (10,111.73 km) |
| Westmont to Orzinuovi | 6,071.69 mi (9,771.45 km) |
| Westmont to Osimo | 6,285.20 mi (10,115.04 km) |
| Westmont to Ospitaletto | 6,067.97 mi (9,765.46 km) |
| Westmont to Ostuni | 6,563.18 mi (10,562.42 km) |
| Westmont to Ottaviano | 6,460.04 mi (10,396.42 km) |
| Westmont to Ovada | 6,069.94 mi (9,768.63 km) |
| Westmont to Ozieri | 6,292.01 mi (10,126.01 km) |
| Westmont to Paceco | 6,551.66 mi (10,543.88 km) |
