| Pecos to Orbetello | 5,869.58 mi (9,446.17 km) |
| Pecos to Oria | 6,208.27 mi (9,991.24 km) |
| Pecos to Oristano | 5,870.58 mi (9,447.79 km) |
| Pecos to Orta Nova | 6,095.48 mi (9,809.73 km) |
| Pecos to Orte | 5,914.98 mi (9,519.25 km) |
| Pecos to Ortona | 5,998.28 mi (9,653.31 km) |
| Pecos to Orvieto | 5,892.82 mi (9,483.57 km) |
| Pecos to Orzinuovi | 5,692.71 mi (9,161.53 km) |
| Pecos to Osimo | 5,912.10 mi (9,514.61 km) |
| Pecos to Ospitaletto | 5,691.48 mi (9,159.55 km) |
| Pecos to Ostuni | 6,195.35 mi (9,970.45 km) |
| Pecos to Ottaviano | 6,069.29 mi (9,767.58 km) |
| Pecos to Ovada | 5,674.75 mi (9,132.63 km) |
| Pecos to Ozieri | 5,859.20 mi (9,429.47 km) |
| Pecos to Paceco | 6,119.61 mi (9,848.56 km) |
