| Pernik to Oignies | 1,091.69 mi (1,756.91 km) |
| Pernik to Oissel | 1,146.65 mi (1,845.35 km) |
| Pernik to Olivet | 1,086.53 mi (1,748.61 km) |
| Pernik to Ollioules | 869.57 mi (1,399.43 km) |
| Pernik to Olonne-sur-Mer | 1,245.42 mi (2,004.30 km) |
| Pernik to Oloron-Sainte-Marie | 1,193.29 mi (1,920.41 km) |
| Pernik to Onet Village | 1,029.22 mi (1,656.36 km) |
| Pernik to Onnaing | 1,064.96 mi (1,713.88 km) |
| Pernik to Orange | 919.55 mi (1,479.87 km) |
| Pernik to Orchies | 1,081.64 mi (1,740.74 km) |
| Pernik to Orleans | 1,086.70 mi (1,748.87 km) |
| Pernik to Orly | 1,078.80 mi (1,736.16 km) |
| Pernik to Ormesson-sur-Marne | 1,073.19 mi (1,727.13 km) |
| Pernik to Orsay | 1,087.00 mi (1,749.36 km) |
| Pernik to Orthez | 1,199.46 mi (1,930.35 km) |
