| Olsztyn to Octeville | 985.11 mi (1,585.38 km) |
| Olsztyn to Oignies | 773.87 mi (1,245.43 km) |
| Olsztyn to Oissel | 883.99 mi (1,422.65 km) |
| Olsztyn to Olivet | 904.38 mi (1,455.47 km) |
| Olsztyn to Ollioules | 991.05 mi (1,594.95 km) |
| Olsztyn to Olonne-sur-Mer | 1,098.45 mi (1,767.78 km) |
| Olsztyn to Oloron-Sainte-Marie | 1,203.52 mi (1,936.88 km) |
| Olsztyn to Onet Village | 1,033.40 mi (1,663.10 km) |
| Olsztyn to Onnaing | 751.93 mi (1,210.12 km) |
| Olsztyn to Orange | 970.17 mi (1,561.34 km) |
| Olsztyn to Orchies | 763.65 mi (1,228.97 km) |
| Olsztyn to Orleans | 902.58 mi (1,452.56 km) |
| Olsztyn to Orly | 852.75 mi (1,372.36 km) |
| Olsztyn to Ormesson-sur-Marne | 845.57 mi (1,360.82 km) |
| Olsztyn to Orsay | 862.40 mi (1,387.90 km) |
