| Halstenbek to Oestrich-Winkel | 263.00 mi (423.25 km) |
| Halstenbek to Offenburg | 366.40 mi (589.67 km) |
| Halstenbek to Oftersheim | 299.40 mi (481.84 km) |
| Halstenbek to Ohrdruf | 197.49 mi (317.84 km) |
| Halstenbek to Ohringen | 306.66 mi (493.52 km) |
| Halstenbek to Olbernhau | 252.89 mi (406.98 km) |
| Halstenbek to Olching | 380.88 mi (612.97 km) |
| Halstenbek to Oldenburg | 74.95 mi (120.62 km) |
| Halstenbek to Oldenburg in Holstein | 62.68 mi (100.88 km) |
| Halstenbek to Olfen | 167.63 mi (269.77 km) |
| Halstenbek to Olpe | 199.60 mi (321.23 km) |
| Halstenbek to Olsberg | 167.73 mi (269.93 km) |
| Halstenbek to Oranienburg | 153.25 mi (246.64 km) |
| Halstenbek to Ortenberg | 228.89 mi (368.36 km) |
| Halstenbek to Oschatz | 211.93 mi (341.06 km) |
