| Willow Grove to Opole | 4,268.35 mi (6,869.24 km) |
| Willow Grove to Orzesze | 4,317.42 mi (6,948.21 km) |
| Willow Grove to Osowa | 4,161.15 mi (6,696.72 km) |
| Willow Grove to Ostroda | 4,238.60 mi (6,821.36 km) |
| Willow Grove to Ostroleka | 4,317.61 mi (6,948.53 km) |
| Willow Grove to Ostrow Mazowiecka | 4,339.05 mi (6,983.02 km) |
| Willow Grove to Ostrow Wielkopolski | 4,230.31 mi (6,808.02 km) |
| Willow Grove to Ostrowiec Swietokrzyski | 4,388.69 mi (7,062.91 km) |
| Willow Grove to Ostrzeszow | 4,242.60 mi (6,827.81 km) |
| Willow Grove to Oswiecim | 4,339.32 mi (6,983.46 km) |
| Willow Grove to Otwock | 4,340.90 mi (6,986.00 km) |
| Willow Grove to Ozarow Mazowiecki | 4,320.40 mi (6,953.01 km) |
| Willow Grove to Ozimek | 4,278.73 mi (6,885.95 km) |
| Willow Grove to Ozorkow | 4,273.78 mi (6,877.98 km) |
| Willow Grove to Pabianice | 4,288.51 mi (6,901.68 km) |
