| Sierpc to Octeville | 944.72 mi (1,520.38 km) |
| Sierpc to Oignies | 731.76 mi (1,177.66 km) |
| Sierpc to Oissel | 839.32 mi (1,350.75 km) |
| Sierpc to Olivet | 853.32 mi (1,373.29 km) |
| Sierpc to Ollioules | 924.97 mi (1,488.59 km) |
| Sierpc to Olonne-sur-Mer | 1,048.25 mi (1,687.00 km) |
| Sierpc to Oloron-Sainte-Marie | 1,144.74 mi (1,842.28 km) |
| Sierpc to Onet Village | 972.80 mi (1,565.57 km) |
| Sierpc to Onnaing | 708.67 mi (1,140.49 km) |
| Sierpc to Orange | 906.50 mi (1,458.88 km) |
| Sierpc to Orchies | 721.25 mi (1,160.75 km) |
| Sierpc to Orleans | 851.63 mi (1,370.57 km) |
| Sierpc to Orly | 804.07 mi (1,294.03 km) |
| Sierpc to Ormesson-sur-Marne | 796.86 mi (1,282.42 km) |
| Sierpc to Orsay | 813.84 mi (1,309.75 km) |
