| Helsinki to Oignies | 1,083.75 mi (1,744.13 km) |
| Helsinki to Oissel | 1,198.43 mi (1,928.68 km) |
| Helsinki to Olivet | 1,251.97 mi (2,014.85 km) |
| Helsinki to Ollioules | 1,421.94 mi (2,288.39 km) |
| Helsinki to Olonne-sur-Mer | 1,431.78 mi (2,304.23 km) |
| Helsinki to Oloron-Sainte-Marie | 1,584.35 mi (2,549.76 km) |
| Helsinki to Onet Village | 1,429.67 mi (2,300.83 km) |
| Helsinki to Onnaing | 1,069.69 mi (1,721.50 km) |
| Helsinki to Orange | 1,386.36 mi (2,231.13 km) |
| Helsinki to Orchies | 1,075.91 mi (1,731.51 km) |
| Helsinki to Orleans | 1,249.65 mi (2,011.11 km) |
| Helsinki to Orly | 1,190.63 mi (1,916.13 km) |
| Helsinki to Ormesson-sur-Marne | 1,184.15 mi (1,905.70 km) |
| Helsinki to Orsay | 1,199.08 mi (1,929.73 km) |
| Helsinki to Orthez | 1,572.02 mi (2,529.92 km) |
