| Seacombe to Orbetello | 1,000.89 mi (1,610.78 km) |
| Seacombe to Oria | 1,312.15 mi (2,111.70 km) |
| Seacombe to Oristano | 1,080.48 mi (1,738.86 km) |
| Seacombe to Orta Nova | 1,203.66 mi (1,937.10 km) |
| Seacombe to Orte | 1,035.61 mi (1,666.66 km) |
| Seacombe to Ortona | 1,106.32 mi (1,780.44 km) |
| Seacombe to Orvieto | 1,012.93 mi (1,630.15 km) |
| Seacombe to Orzinuovi | 801.38 mi (1,289.69 km) |
| Seacombe to Osimo | 1,016.81 mi (1,636.40 km) |
| Seacombe to Ospitaletto | 797.96 mi (1,284.19 km) |
| Seacombe to Ostuni | 1,298.18 mi (2,089.23 km) |
| Seacombe to Ottaviano | 1,189.61 mi (1,914.50 km) |
| Seacombe to Ovada | 802.31 mi (1,291.20 km) |
| Seacombe to Ozieri | 1,048.80 mi (1,687.88 km) |
| Seacombe to Paceco | 1,298.15 mi (2,089.17 km) |
