| Pottstown to Octeville | 3,527.87 mi (5,677.56 km) |
| Pottstown to Oignies | 3,700.27 mi (5,955.01 km) |
| Pottstown to Oissel | 3,649.82 mi (5,873.81 km) |
| Pottstown to Olivet | 3,722.27 mi (5,990.41 km) |
| Pottstown to Ollioules | 4,034.00 mi (6,492.10 km) |
| Pottstown to Olonne-sur-Mer | 3,597.11 mi (5,788.98 km) |
| Pottstown to Oloron-Sainte-Marie | 3,740.16 mi (6,019.21 km) |
| Pottstown to Onet Village | 3,850.91 mi (6,197.44 km) |
| Pottstown to Onnaing | 3,727.07 mi (5,998.14 km) |
| Pottstown to Orange | 3,956.42 mi (6,367.25 km) |
| Pottstown to Orchies | 3,710.38 mi (5,971.28 km) |
| Pottstown to Orleans | 3,721.60 mi (5,989.34 km) |
| Pottstown to Orly | 3,719.88 mi (5,986.57 km) |
| Pottstown to Ormesson-sur-Marne | 3,724.90 mi (5,994.65 km) |
| Pottstown to Orsay | 3,712.42 mi (5,974.57 km) |
