| Porterville to Opole | 5,898.10 mi (9,492.07 km) |
| Porterville to Orzesze | 5,947.68 mi (9,571.87 km) |
| Porterville to Osowa | 5,693.92 mi (9,163.48 km) |
| Porterville to Ostroda | 5,769.03 mi (9,284.35 km) |
| Porterville to Ostroleka | 5,840.87 mi (9,399.97 km) |
| Porterville to Ostrow Mazowiecka | 5,863.81 mi (9,436.89 km) |
| Porterville to Ostrow Wielkopolski | 5,838.78 mi (9,396.61 km) |
| Porterville to Ostrowiec Swietokrzyski | 5,963.51 mi (9,597.34 km) |
| Porterville to Ostrzeszow | 5,854.95 mi (9,422.63 km) |
| Porterville to Oswiecim | 5,965.50 mi (9,600.54 km) |
| Porterville to Otwock | 5,890.56 mi (9,479.93 km) |
| Porterville to Ozarow Mazowiecki | 5,874.36 mi (9,453.87 km) |
| Porterville to Ozimek | 5,904.49 mi (9,502.36 km) |
| Porterville to Ozorkow | 5,854.76 mi (9,422.32 km) |
| Porterville to Pabianice | 5,875.49 mi (9,455.69 km) |
