| Wittmund to Oerlinghausen | 117.13 mi (188.50 km) |
| Wittmund to Oestrich-Winkel | 247.19 mi (397.81 km) |
| Wittmund to Offenburg | 353.01 mi (568.12 km) |
| Wittmund to Oftersheim | 292.54 mi (470.80 km) |
| Wittmund to Ohrdruf | 227.22 mi (365.67 km) |
| Wittmund to Ohringen | 311.21 mi (500.85 km) |
| Wittmund to Olbernhau | 309.46 mi (498.03 km) |
| Wittmund to Olching | 401.96 mi (646.89 km) |
| Wittmund to Oldenburg | 34.73 mi (55.89 km) |
| Wittmund to Oldenburg in Holstein | 135.75 mi (218.47 km) |
| Wittmund to Olfen | 129.47 mi (208.37 km) |
| Wittmund to Olpe | 176.78 mi (284.49 km) |
| Wittmund to Olsberg | 156.55 mi (251.94 km) |
| Wittmund to Oranienburg | 232.94 mi (374.89 km) |
| Wittmund to Ortenberg | 228.94 mi (368.44 km) |
