| Streamwood to Orbetello | 4,750.90 mi (7,645.83 km) |
| Streamwood to Oria | 5,091.53 mi (8,194.03 km) |
| Streamwood to Oristano | 4,750.90 mi (7,645.84 km) |
| Streamwood to Orta Nova | 4,978.26 mi (8,011.73 km) |
| Streamwood to Orte | 4,796.86 mi (7,719.80 km) |
| Streamwood to Ortona | 4,881.24 mi (7,855.60 km) |
| Streamwood to Orvieto | 4,774.77 mi (7,684.26 km) |
| Streamwood to Orzinuovi | 4,576.20 mi (7,364.68 km) |
| Streamwood to Osimo | 4,795.70 mi (7,717.94 km) |
| Streamwood to Ospitaletto | 4,575.26 mi (7,363.17 km) |
| Streamwood to Ostuni | 5,078.83 mi (8,173.59 km) |
| Streamwood to Ottaviano | 4,950.92 mi (7,967.74 km) |
| Streamwood to Ovada | 4,556.69 mi (7,333.29 km) |
| Streamwood to Ozieri | 4,739.42 mi (7,627.35 km) |
| Streamwood to Paceco | 4,999.84 mi (8,046.47 km) |
