| Sieradz to Octeville | 901.39 mi (1,450.65 km) |
| Sieradz to Oignies | 687.69 mi (1,106.73 km) |
| Sieradz to Oissel | 790.00 mi (1,271.39 km) |
| Sieradz to Olivet | 793.38 mi (1,276.82 km) |
| Sieradz to Ollioules | 838.12 mi (1,348.82 km) |
| Sieradz to Olonne-sur-Mer | 988.64 mi (1,591.05 km) |
| Sieradz to Oloron-Sainte-Marie | 1,070.51 mi (1,722.82 km) |
| Sieradz to Onet Village | 895.89 mi (1,441.80 km) |
| Sieradz to Onnaing | 663.00 mi (1,067.00 km) |
| Sieradz to Orange | 824.25 mi (1,326.50 km) |
| Sieradz to Orchies | 676.85 mi (1,089.29 km) |
| Sieradz to Orleans | 791.89 mi (1,274.43 km) |
| Sieradz to Orly | 748.49 mi (1,204.58 km) |
| Sieradz to Ormesson-sur-Marne | 741.26 mi (1,192.95 km) |
| Sieradz to Orsay | 758.36 mi (1,220.46 km) |
