| Olecko to Octeville | 1,068.94 mi (1,720.29 km) |
| Olecko to Oignies | 857.90 mi (1,380.66 km) |
| Olecko to Oissel | 968.11 mi (1,558.03 km) |
| Olecko to Olivet | 988.03 mi (1,590.09 km) |
| Olecko to Ollioules | 1,065.40 mi (1,714.59 km) |
| Olecko to Olonne-sur-Mer | 1,182.26 mi (1,902.67 km) |
| Olecko to Oloron-Sainte-Marie | 1,284.63 mi (2,067.41 km) |
| Olecko to Onet Village | 1,113.37 mi (1,791.80 km) |
| Olecko to Onnaing | 836.03 mi (1,345.45 km) |
| Olecko to Orange | 1,047.55 mi (1,685.86 km) |
| Olecko to Orchies | 847.70 mi (1,364.24 km) |
| Olecko to Orleans | 986.25 mi (1,587.22 km) |
| Olecko to Orly | 936.70 mi (1,507.48 km) |
| Olecko to Ormesson-sur-Marne | 929.53 mi (1,495.93 km) |
| Olecko to Orsay | 946.37 mi (1,523.04 km) |
