| Seraing to Oestrich-Winkel | 117.48 mi (189.06 km) |
| Seraing to Offenburg | 182.45 mi (293.63 km) |
| Seraing to Oftersheim | 160.63 mi (258.50 km) |
| Seraing to Ohrdruf | 229.55 mi (369.42 km) |
| Seraing to Ohringen | 202.04 mi (325.15 km) |
| Seraing to Olbernhau | 343.24 mi (552.39 km) |
| Seraing to Olching | 308.97 mi (497.23 km) |
| Seraing to Oldenburg | 211.41 mi (340.23 km) |
| Seraing to Oldenburg in Holstein | 342.37 mi (550.99 km) |
| Seraing to Olfen | 113.11 mi (182.03 km) |
| Seraing to Olpe | 106.20 mi (170.91 km) |
| Seraing to Olsberg | 140.19 mi (225.62 km) |
| Seraing to Oranienburg | 363.65 mi (585.24 km) |
| Seraing to Ortenberg | 157.12 mi (252.87 km) |
| Seraing to Oschatz | 334.72 mi (538.68 km) |
