| San Felice Circeo to Orbetello | 127.74 mi (205.57 km) |
| San Felice Circeo to Oria | 242.45 mi (390.18 km) |
| San Felice Circeo to Oristano | 253.57 mi (408.08 km) |
| San Felice Circeo to Orta Nova | 135.97 mi (218.82 km) |
| San Felice Circeo to Orte | 92.18 mi (148.35 km) |
| San Felice Circeo to Ortona | 102.21 mi (164.49 km) |
| San Felice Circeo to Orvieto | 114.28 mi (183.92 km) |
| San Felice Circeo to Orzinuovi | 328.68 mi (528.95 km) |
| San Felice Circeo to Osimo | 156.58 mi (251.99 km) |
| San Felice Circeo to Ospitaletto | 334.77 mi (538.77 km) |
| San Felice Circeo to Ostuni | 236.60 mi (380.77 km) |
| San Felice Circeo to Ottaviano | 76.78 mi (123.56 km) |
| San Felice Circeo to Ovada | 325.42 mi (523.71 km) |
| San Felice Circeo to Ozieri | 218.34 mi (351.38 km) |
| San Felice Circeo to Paceco | 226.56 mi (364.61 km) |
