| Alsip to Orbetello | 4,748.26 mi (7,641.59 km) |
| Alsip to Oria | 5,089.87 mi (8,191.35 km) |
| Alsip to Oristano | 4,746.28 mi (7,638.40 km) |
| Alsip to Orta Nova | 4,976.40 mi (8,008.74 km) |
| Alsip to Orte | 4,794.57 mi (7,716.11 km) |
| Alsip to Ortona | 4,879.47 mi (7,852.75 km) |
| Alsip to Orvieto | 4,772.53 mi (7,680.64 km) |
| Alsip to Orzinuovi | 4,574.69 mi (7,362.26 km) |
| Alsip to Osimo | 4,794.21 mi (7,715.54 km) |
| Alsip to Ospitaletto | 4,573.87 mi (7,360.94 km) |
| Alsip to Ostuni | 5,077.26 mi (8,171.05 km) |
| Alsip to Ottaviano | 4,948.47 mi (7,963.80 km) |
| Alsip to Ovada | 4,554.46 mi (7,329.69 km) |
| Alsip to Ozieri | 4,735.25 mi (7,620.64 km) |
| Alsip to Paceco | 4,995.48 mi (8,039.45 km) |
