| Helsingor to Oria | 1,097.31 mi (1,765.96 km) |
| Helsingor to Oristano | 1,129.40 mi (1,817.59 km) |
| Helsingor to Orta Nova | 1,025.59 mi (1,650.52 km) |
| Helsingor to Orte | 938.05 mi (1,509.64 km) |
| Helsingor to Ortona | 948.99 mi (1,527.25 km) |
| Helsingor to Orvieto | 920.44 mi (1,481.30 km) |
| Helsingor to Orzinuovi | 744.00 mi (1,197.35 km) |
| Helsingor to Osimo | 868.17 mi (1,397.19 km) |
| Helsingor to Ospitaletto | 732.44 mi (1,178.74 km) |
| Helsingor to Ostuni | 1,080.99 mi (1,739.68 km) |
| Helsingor to Ottaviano | 1,052.65 mi (1,694.08 km) |
| Helsingor to Ovada | 806.26 mi (1,297.55 km) |
| Helsingor to Ozieri | 1,079.98 mi (1,738.06 km) |
| Helsingor to Paceco | 1,247.33 mi (2,007.38 km) |
| Helsingor to Pachino | 1,339.90 mi (2,156.36 km) |
