| Holbeach to Orbetello | 883.65 mi (1,422.09 km) |
| Holbeach to Oria | 1,185.84 mi (1,908.42 km) |
| Holbeach to Oristano | 978.89 mi (1,575.36 km) |
| Holbeach to Orta Nova | 1,078.91 mi (1,736.34 km) |
| Holbeach to Orte | 915.23 mi (1,472.92 km) |
| Holbeach to Ortona | 981.94 mi (1,580.27 km) |
| Holbeach to Orvieto | 892.59 mi (1,436.49 km) |
| Holbeach to Orzinuovi | 679.18 mi (1,093.03 km) |
| Holbeach to Osimo | 891.76 mi (1,435.14 km) |
| Holbeach to Ospitaletto | 674.90 mi (1,086.15 km) |
| Holbeach to Ostuni | 1,171.59 mi (1,885.50 km) |
| Holbeach to Ottaviano | 1,068.06 mi (1,718.88 km) |
| Holbeach to Ovada | 686.70 mi (1,105.13 km) |
| Holbeach to Ozieri | 943.90 mi (1,519.06 km) |
| Holbeach to Paceco | 1,187.11 mi (1,910.47 km) |
