| Louth to Orbetello | 914.20 mi (1,471.26 km) |
| Louth to Oria | 1,211.24 mi (1,949.30 km) |
| Louth to Oristano | 1,013.85 mi (1,631.63 km) |
| Louth to Orta Nova | 1,105.47 mi (1,779.09 km) |
| Louth to Orte | 944.37 mi (1,519.82 km) |
| Louth to Ortona | 1,008.83 mi (1,623.55 km) |
| Louth to Orvieto | 921.79 mi (1,483.48 km) |
| Louth to Orzinuovi | 707.78 mi (1,139.06 km) |
| Louth to Osimo | 918.32 mi (1,477.89 km) |
| Louth to Ospitaletto | 703.04 mi (1,131.44 km) |
| Louth to Ostuni | 1,196.80 mi (1,926.06 km) |
| Louth to Ottaviano | 1,096.46 mi (1,764.59 km) |
| Louth to Ovada | 718.20 mi (1,155.82 km) |
| Louth to Ozieri | 978.17 mi (1,574.21 km) |
| Louth to Paceco | 1,219.54 mi (1,962.65 km) |
