| Purmerend to Orbetello | 753.45 mi (1,212.57 km) |
| Purmerend to Oria | 1,022.14 mi (1,644.97 km) |
| Purmerend to Oristano | 887.13 mi (1,427.70 km) |
| Purmerend to Orta Nova | 921.67 mi (1,483.28 km) |
| Purmerend to Orte | 774.76 mi (1,246.86 km) |
| Purmerend to Ortona | 827.28 mi (1,331.37 km) |
| Purmerend to Orvieto | 752.79 mi (1,211.50 km) |
| Purmerend to Orzinuovi | 539.85 mi (868.80 km) |
| Purmerend to Osimo | 736.30 mi (1,184.97 km) |
| Purmerend to Ospitaletto | 532.69 mi (857.29 km) |
| Purmerend to Ostuni | 1,007.05 mi (1,620.69 km) |
| Purmerend to Ottaviano | 921.20 mi (1,482.52 km) |
| Purmerend to Ovada | 568.62 mi (915.10 km) |
| Purmerend to Ozieri | 845.14 mi (1,360.12 km) |
| Purmerend to Paceco | 1,067.55 mi (1,718.05 km) |
