| Royal Palm Beach to Orbetello | 5,067.20 mi (8,154.87 km) |
| Royal Palm Beach to Oria | 5,425.38 mi (8,731.31 km) |
| Royal Palm Beach to Oristano | 5,002.01 mi (8,049.96 km) |
| Royal Palm Beach to Orta Nova | 5,310.22 mi (8,545.97 km) |
| Royal Palm Beach to Orte | 5,122.31 mi (8,243.57 km) |
| Royal Palm Beach to Ortona | 5,220.14 mi (8,401.00 km) |
| Royal Palm Beach to Orvieto | 5,102.67 mi (8,211.95 km) |
| Royal Palm Beach to Orzinuovi | 4,936.24 mi (7,944.11 km) |
| Royal Palm Beach to Osimo | 5,147.10 mi (8,283.46 km) |
| Royal Palm Beach to Ospitaletto | 4,939.04 mi (7,948.61 km) |
| Royal Palm Beach to Ostuni | 5,416.10 mi (8,716.37 km) |
| Royal Palm Beach to Ottaviano | 5,264.88 mi (8,473.00 km) |
| Royal Palm Beach to Ovada | 4,894.26 mi (7,876.55 km) |
| Royal Palm Beach to Ozieri | 5,005.96 mi (8,056.31 km) |
| Royal Palm Beach to Paceco | 5,248.80 mi (8,447.13 km) |
