| Guernica y Luno to Orbetello | 704.52 mi (1,133.81 km) |
| Guernica y Luno to Oria | 1,059.05 mi (1,704.38 km) |
| Guernica y Luno to Oristano | 626.87 mi (1,008.86 km) |
| Guernica y Luno to Orta Nova | 946.83 mi (1,523.77 km) |
| Guernica y Luno to Orte | 763.27 mi (1,228.37 km) |
| Guernica y Luno to Ortona | 865.80 mi (1,393.38 km) |
| Guernica y Luno to Orvieto | 746.66 mi (1,201.63 km) |
| Guernica y Luno to Orzinuovi | 638.14 mi (1,026.99 km) |
| Guernica y Luno to Osimo | 809.56 mi (1,302.86 km) |
| Guernica y Luno to Ospitaletto | 646.51 mi (1,040.46 km) |
| Guernica y Luno to Ostuni | 1,051.87 mi (1,692.82 km) |
| Guernica y Luno to Ottaviano | 893.82 mi (1,438.47 km) |
| Guernica y Luno to Ovada | 569.38 mi (916.33 km) |
| Guernica y Luno to Ozieri | 628.05 mi (1,010.75 km) |
| Guernica y Luno to Paceco | 876.94 mi (1,411.29 km) |
