| Longford to Oria | 1,491.39 mi (2,400.16 km) |
| Longford to Oristano | 1,223.75 mi (1,969.43 km) |
| Longford to Orta Nova | 1,380.57 mi (2,221.81 km) |
| Longford to Orte | 1,206.47 mi (1,941.62 km) |
| Longford to Ortona | 1,283.02 mi (2,064.83 km) |
| Longford to Orvieto | 1,183.86 mi (1,905.24 km) |
| Longford to Orzinuovi | 976.69 mi (1,571.83 km) |
| Longford to Osimo | 1,195.02 mi (1,923.20 km) |
| Longford to Ospitaletto | 974.52 mi (1,568.34 km) |
| Longford to Ostuni | 1,477.95 mi (2,378.53 km) |
| Longford to Ottaviano | 1,361.41 mi (2,190.98 km) |
| Longford to Ovada | 968.48 mi (1,558.62 km) |
| Longford to Ozieri | 1,197.12 mi (1,926.57 km) |
| Longford to Paceco | 1,453.16 mi (2,338.64 km) |
| Longford to Pachino | 1,605.58 mi (2,583.93 km) |
