| Seymour to Orbetello | 4,789.27 mi (7,707.58 km) |
| Seymour to Oria | 5,136.31 mi (8,266.10 km) |
| Seymour to Oristano | 4,774.76 mi (7,684.23 km) |
| Seymour to Orta Nova | 5,021.81 mi (8,081.82 km) |
| Seymour to Orte | 4,837.62 mi (7,785.40 km) |
| Seymour to Ortona | 4,925.63 mi (7,927.04 km) |
| Seymour to Orvieto | 4,815.92 mi (7,750.47 km) |
| Seymour to Orzinuovi | 4,623.06 mi (7,440.10 km) |
| Seymour to Osimo | 4,842.27 mi (7,792.88 km) |
| Seymour to Ospitaletto | 4,622.96 mi (7,439.93 km) |
| Seymour to Ostuni | 5,124.28 mi (8,246.73 km) |
| Seymour to Ottaviano | 4,990.26 mi (8,031.04 km) |
| Seymour to Ovada | 4,598.34 mi (7,400.31 km) |
| Seymour to Ozieri | 4,766.61 mi (7,671.11 km) |
| Seymour to Paceco | 5,025.12 mi (8,087.15 km) |
