| Galway to Oria | 1,523.75 mi (2,452.24 km) |
| Galway to Oristano | 1,240.03 mi (1,995.63 km) |
| Galway to Orta Nova | 1,411.82 mi (2,272.10 km) |
| Galway to Orte | 1,234.97 mi (1,987.50 km) |
| Galway to Ortona | 1,314.37 mi (2,115.27 km) |
| Galway to Orvieto | 1,212.48 mi (1,951.29 km) |
| Galway to Orzinuovi | 1,008.24 mi (1,622.61 km) |
| Galway to Osimo | 1,227.40 mi (1,975.31 km) |
| Galway to Ospitaletto | 1,006.72 mi (1,620.16 km) |
| Galway to Ostuni | 1,510.64 mi (2,431.14 km) |
| Galway to Ottaviano | 1,389.99 mi (2,236.98 km) |
| Galway to Ovada | 995.66 mi (1,602.36 km) |
| Galway to Ozieri | 1,215.55 mi (1,956.24 km) |
| Galway to Paceco | 1,473.63 mi (2,371.57 km) |
| Galway to Pachino | 1,628.32 mi (2,620.52 km) |
