| Pottstown to Nuth | 3,805.62 mi (6,124.55 km) |
| Pottstown to Oegstgeest | 3,716.28 mi (5,980.78 km) |
| Pottstown to Oirschot | 3,766.82 mi (6,062.11 km) |
| Pottstown to Oisterwijk | 3,760.66 mi (6,052.21 km) |
| Pottstown to Oldebroek | 3,765.77 mi (6,060.41 km) |
| Pottstown to Oldenzaal | 3,809.57 mi (6,130.91 km) |
| Pottstown to Ommen | 3,784.17 mi (6,090.03 km) |
| Pottstown to Oosterend | 3,757.99 mi (6,047.90 km) |
| Pottstown to Oosterhout | 3,745.47 mi (6,027.75 km) |
| Pottstown to Oosterwolde | 3,767.02 mi (6,062.43 km) |
| Pottstown to Oostzaan | 3,726.40 mi (5,997.06 km) |
| Pottstown to Opmeer | 3,722.32 mi (5,990.49 km) |
| Pottstown to Oss | 3,768.45 mi (6,064.74 km) |
| Pottstown to Oud-Beijerland | 3,722.87 mi (5,991.38 km) |
| Pottstown to Oudenbosch | 3,733.58 mi (6,008.62 km) |
