| Plonsk to Octeville | 973.29 mi (1,566.35 km) |
| Plonsk to Oignies | 759.95 mi (1,223.03 km) |
| Plonsk to Oissel | 866.40 mi (1,394.34 km) |
| Plonsk to Olivet | 877.48 mi (1,412.16 km) |
| Plonsk to Ollioules | 936.88 mi (1,507.76 km) |
| Plonsk to Olonne-sur-Mer | 1,072.65 mi (1,726.27 km) |
| Plonsk to Oloron-Sainte-Marie | 1,163.77 mi (1,872.91 km) |
| Plonsk to Onet Village | 990.51 mi (1,594.08 km) |
| Plonsk to Onnaing | 736.47 mi (1,185.23 km) |
| Plonsk to Orange | 921.36 mi (1,482.79 km) |
| Plonsk to Orchies | 749.36 mi (1,205.98 km) |
| Plonsk to Orleans | 875.85 mi (1,409.54 km) |
| Plonsk to Orly | 829.47 mi (1,334.90 km) |
| Plonsk to Ormesson-sur-Marne | 822.24 mi (1,323.27 km) |
| Plonsk to Orsay | 839.27 mi (1,350.67 km) |
