| Effingham to Opole | 4,809.23 mi (7,739.70 km) |
| Effingham to Orzesze | 4,859.52 mi (7,820.65 km) |
| Effingham to Osowa | 4,670.64 mi (7,516.67 km) |
| Effingham to Ostroda | 4,749.34 mi (7,643.32 km) |
| Effingham to Ostroleka | 4,828.18 mi (7,770.20 km) |
| Effingham to Ostrow Mazowiecka | 4,850.59 mi (7,806.27 km) |
| Effingham to Ostrow Wielkopolski | 4,764.06 mi (7,667.02 km) |
| Effingham to Ostrowiec Swietokrzyski | 4,916.18 mi (7,911.82 km) |
| Effingham to Ostrzeszow | 4,777.78 mi (7,689.10 km) |
| Effingham to Oswiecim | 4,880.71 mi (7,854.75 km) |
| Effingham to Otwock | 4,859.86 mi (7,821.19 km) |
| Effingham to Ozarow Mazowiecki | 4,840.14 mi (7,789.46 km) |
| Effingham to Ozimek | 4,818.67 mi (7,754.90 km) |
| Effingham to Ozorkow | 4,800.41 mi (7,725.52 km) |
| Effingham to Pabianice | 4,817.26 mi (7,752.63 km) |
