| Lake Ronkonkoma to Orbetello | 4,161.97 mi (6,698.04 km) |
| Lake Ronkonkoma to Oria | 4,515.02 mi (7,266.23 km) |
| Lake Ronkonkoma to Oristano | 4,131.03 mi (6,648.25 km) |
| Lake Ronkonkoma to Orta Nova | 4,399.61 mi (7,080.49 km) |
| Lake Ronkonkoma to Orte | 4,213.00 mi (6,780.17 km) |
| Lake Ronkonkoma to Ortona | 4,305.09 mi (6,928.37 km) |
| Lake Ronkonkoma to Orvieto | 4,191.90 mi (6,746.21 km) |
| Lake Ronkonkoma to Orzinuovi | 4,007.71 mi (6,449.79 km) |
| Lake Ronkonkoma to Osimo | 4,225.07 mi (6,799.60 km) |
| Lake Ronkonkoma to Ospitaletto | 4,008.74 mi (6,451.44 km) |
| Lake Ronkonkoma to Ostuni | 4,503.92 mi (7,248.36 km) |
| Lake Ronkonkoma to Ottaviano | 4,363.00 mi (7,021.57 km) |
| Lake Ronkonkoma to Ovada | 3,976.31 mi (6,399.25 km) |
| Lake Ronkonkoma to Ozieri | 4,126.49 mi (6,640.94 km) |
| Lake Ronkonkoma to Paceco | 4,381.75 mi (7,051.75 km) |
