| Helsinki to Oria | 1,394.77 mi (2,244.66 km) |
| Helsinki to Oristano | 1,566.98 mi (2,521.82 km) |
| Helsinki to Orta Nova | 1,359.71 mi (2,188.24 km) |
| Helsinki to Orte | 1,333.08 mi (2,145.39 km) |
| Helsinki to Ortona | 1,309.12 mi (2,106.82 km) |
| Helsinki to Orvieto | 1,320.93 mi (2,125.83 km) |
| Helsinki to Orzinuovi | 1,191.51 mi (1,917.55 km) |
| Helsinki to Osimo | 1,248.28 mi (2,008.90 km) |
| Helsinki to Ospitaletto | 1,178.90 mi (1,897.26 km) |
| Helsinki to Ostuni | 1,379.41 mi (2,219.95 km) |
| Helsinki to Ottaviano | 1,407.84 mi (2,265.70 km) |
| Helsinki to Ovada | 1,266.34 mi (2,037.98 km) |
| Helsinki to Ozieri | 1,515.38 mi (2,438.77 km) |
| Helsinki to Paceco | 1,626.02 mi (2,616.83 km) |
| Helsinki to Pachino | 1,677.88 mi (2,700.28 km) |
