| Parma Heights to Orbetello | 4,513.86 mi (7,264.36 km) |
| Parma Heights to Oria | 4,860.92 mi (7,822.90 km) |
| Parma Heights to Oristano | 4,500.02 mi (7,242.08 km) |
| Parma Heights to Orta Nova | 4,746.40 mi (7,638.60 km) |
| Parma Heights to Orte | 4,562.20 mi (7,342.16 km) |
| Parma Heights to Ortona | 4,650.24 mi (7,483.84 km) |
| Parma Heights to Orvieto | 4,540.50 mi (7,307.22 km) |
| Parma Heights to Orzinuovi | 4,347.75 mi (6,997.02 km) |
| Parma Heights to Osimo | 4,566.93 mi (7,349.77 km) |
| Parma Heights to Ospitaletto | 4,347.68 mi (6,996.91 km) |
| Parma Heights to Ostuni | 4,848.90 mi (7,803.56 km) |
| Parma Heights to Ottaviano | 4,714.85 mi (7,587.81 km) |
| Parma Heights to Ovada | 4,322.93 mi (6,957.08 km) |
| Parma Heights to Ozieri | 4,491.62 mi (7,228.57 km) |
| Parma Heights to Paceco | 4,750.31 mi (7,644.89 km) |
