| Gondomar to Orbetello | 1,018.72 mi (1,639.47 km) |
| Gondomar to Oria | 1,363.66 mi (2,194.60 km) |
| Gondomar to Oristano | 901.98 mi (1,451.60 km) |
| Gondomar to Orta Nova | 1,255.57 mi (2,020.64 km) |
| Gondomar to Orte | 1,078.47 mi (1,735.62 km) |
| Gondomar to Ortona | 1,181.47 mi (1,901.39 km) |
| Gondomar to Orvieto | 1,063.91 mi (1,712.20 km) |
| Gondomar to Orzinuovi | 971.71 mi (1,563.82 km) |
| Gondomar to Osimo | 1,132.93 mi (1,823.27 km) |
| Gondomar to Ospitaletto | 980.46 mi (1,577.89 km) |
| Gondomar to Ostuni | 1,358.24 mi (2,185.87 km) |
| Gondomar to Ottaviano | 1,196.58 mi (1,925.71 km) |
| Gondomar to Ovada | 900.48 mi (1,449.18 km) |
| Gondomar to Ozieri | 915.57 mi (1,473.47 km) |
| Gondomar to Paceco | 1,141.10 mi (1,836.43 km) |
