| Hoffman Estates to Orbetello | 4,747.79 mi (7,640.83 km) |
| Hoffman Estates to Oria | 5,088.39 mi (8,188.97 km) |
| Hoffman Estates to Oristano | 4,747.88 mi (7,640.98 km) |
| Hoffman Estates to Orta Nova | 4,975.12 mi (8,006.69 km) |
| Hoffman Estates to Orte | 4,793.74 mi (7,714.78 km) |
| Hoffman Estates to Ortona | 4,878.10 mi (7,850.55 km) |
| Hoffman Estates to Orvieto | 4,771.65 mi (7,679.23 km) |
| Hoffman Estates to Orzinuovi | 4,573.05 mi (7,359.61 km) |
| Hoffman Estates to Osimo | 4,792.55 mi (7,712.87 km) |
| Hoffman Estates to Ospitaletto | 4,572.11 mi (7,358.09 km) |
| Hoffman Estates to Ostuni | 5,075.68 mi (8,168.52 km) |
| Hoffman Estates to Ottaviano | 4,947.81 mi (7,962.73 km) |
| Hoffman Estates to Ovada | 4,553.57 mi (7,328.26 km) |
| Hoffman Estates to Ozieri | 4,736.38 mi (7,622.46 km) |
| Hoffman Estates to Paceco | 4,996.81 mi (8,041.59 km) |
