| Hoffman Estates to Oerlinghausen | 4,266.01 mi (6,865.49 km) |
| Hoffman Estates to Oestrich-Winkel | 4,316.66 mi (6,947.00 km) |
| Hoffman Estates to Offenburg | 4,373.36 mi (7,038.25 km) |
| Hoffman Estates to Oftersheim | 4,362.64 mi (7,020.99 km) |
| Hoffman Estates to Ohrdruf | 4,383.85 mi (7,055.13 km) |
| Hoffman Estates to Ohringen | 4,403.29 mi (7,086.42 km) |
| Hoffman Estates to Olbernhau | 4,482.66 mi (7,214.14 km) |
| Hoffman Estates to Olching | 4,510.87 mi (7,259.54 km) |
| Hoffman Estates to Oldenburg | 4,205.99 mi (6,768.88 km) |
| Hoffman Estates to Oldenburg in Holstein | 4,254.15 mi (6,846.39 km) |
| Hoffman Estates to Olfen | 4,229.36 mi (6,806.50 km) |
| Hoffman Estates to Olpe | 4,271.89 mi (6,874.94 km) |
| Hoffman Estates to Olsberg | 4,282.82 mi (6,892.53 km) |
| Hoffman Estates to Oranienburg | 4,394.34 mi (7,072.00 km) |
| Hoffman Estates to Ortenberg | 4,341.72 mi (6,987.32 km) |
