| Horizon West to Oerlinghausen | 4,707.46 mi (7,575.92 km) |
| Horizon West to Oestrich-Winkel | 4,723.78 mi (7,602.19 km) |
| Horizon West to Offenburg | 4,755.77 mi (7,653.67 km) |
| Horizon West to Oftersheim | 4,762.79 mi (7,664.97 km) |
| Horizon West to Ohrdruf | 4,817.74 mi (7,753.40 km) |
| Horizon West to Ohringen | 4,805.59 mi (7,733.86 km) |
| Horizon West to Olbernhau | 4,927.63 mi (7,930.25 km) |
| Horizon West to Olching | 4,907.70 mi (7,898.18 km) |
| Horizon West to Oldenburg | 4,663.90 mi (7,505.83 km) |
| Horizon West to Oldenburg in Holstein | 4,741.81 mi (7,631.21 km) |
| Horizon West to Olfen | 4,660.84 mi (7,500.89 km) |
| Horizon West to Olpe | 4,694.34 mi (7,554.81 km) |
| Horizon West to Olsberg | 4,713.68 mi (7,585.93 km) |
| Horizon West to Oranienburg | 4,869.76 mi (7,837.12 km) |
| Horizon West to Ortenberg | 4,759.77 mi (7,660.12 km) |
