| Holland to Orbetello | 4,635.52 mi (7,460.15 km) |
| Holland to Oria | 4,976.93 mi (8,009.60 km) |
| Holland to Oristano | 4,634.24 mi (7,458.09 km) |
| Holland to Orta Nova | 4,863.49 mi (7,827.04 km) |
| Holland to Orte | 4,681.75 mi (7,534.55 km) |
| Holland to Ortona | 4,766.55 mi (7,671.02 km) |
| Holland to Orvieto | 4,659.70 mi (7,499.06 km) |
| Holland to Orzinuovi | 4,461.73 mi (7,180.47 km) |
| Holland to Osimo | 4,681.25 mi (7,533.75 km) |
| Holland to Ospitaletto | 4,460.90 mi (7,179.12 km) |
| Holland to Ostuni | 4,964.31 mi (7,989.28 km) |
| Holland to Ottaviano | 4,835.69 mi (7,782.29 km) |
| Holland to Ovada | 4,441.62 mi (7,148.10 km) |
| Holland to Ozieri | 4,623.01 mi (7,440.02 km) |
| Holland to Paceco | 4,883.33 mi (7,858.96 km) |
