| Siedlce to Octeville | 1,051.84 mi (1,692.78 km) |
| Siedlce to Oignies | 838.15 mi (1,348.87 km) |
| Siedlce to Oissel | 942.54 mi (1,516.88 km) |
| Siedlce to Olivet | 948.28 mi (1,526.11 km) |
| Siedlce to Ollioules | 982.60 mi (1,581.34 km) |
| Siedlce to Olonne-sur-Mer | 1,143.57 mi (1,840.40 km) |
| Siedlce to Oloron-Sainte-Marie | 1,223.88 mi (1,969.65 km) |
| Siedlce to Onet Village | 1,048.34 mi (1,687.14 km) |
| Siedlce to Onnaing | 814.05 mi (1,310.09 km) |
| Siedlce to Orange | 973.48 mi (1,566.66 km) |
| Siedlce to Orchies | 827.43 mi (1,331.61 km) |
| Siedlce to Orleans | 946.77 mi (1,523.68 km) |
| Siedlce to Orly | 902.66 mi (1,452.69 km) |
| Siedlce to Ormesson-sur-Marne | 895.43 mi (1,441.05 km) |
| Siedlce to Orsay | 912.51 mi (1,468.55 km) |
